qemu/hw/tpm/tpm_tis_common.c

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Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/*
* tpm_tis_common.c - QEMU's TPM TIS interface emulator
* device agnostic functions
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
*
* Copyright (C) 2006,2010-2013 IBM Corporation
*
* Authors:
* Stefan Berger <stefanb@us.ibm.com>
* David Safford <safford@us.ibm.com>
*
* Xen 4 support: Andrease Niederl <andreas.niederl@iaik.tugraz.at>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*
* Implementation of the TIS interface according to specs found at
* http://www.trustedcomputinggroup.org. This implementation currently
* supports version 1.3, 21 March 2013
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
* In the developers menu choose the PC Client section then find the TIS
* specification.
*
* TPM TIS for TPM 2 implementation following TCG PC Client Platform
* TPM Profile (PTP) Specification, Familiy 2.0, Revision 00.43
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
*/
#include "qemu/osdep.h"
#include "hw/irq.h"
#include "hw/isa/isa.h"
2016-03-14 16:01:28 +08:00
#include "qapi/error.h"
#include "qemu/module.h"
#include "hw/acpi/tpm.h"
#include "hw/pci/pci_ids.h"
#include "hw/qdev-properties.h"
#include "migration/vmstate.h"
#include "sysemu/tpm_backend.h"
#include "sysemu/tpm_util.h"
#include "tpm_ppi.h"
#include "trace.h"
#include "tpm_tis.h"
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
#define DEBUG_TIS 0
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* local prototypes */
static uint64_t tpm_tis_mmio_read(void *opaque, hwaddr addr,
unsigned size);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* utility functions */
static uint8_t tpm_tis_locality_from_addr(hwaddr addr)
{
return (uint8_t)((addr >> TPM_TIS_LOCALITY_SHIFT) & 0x7);
}
/*
* Set the given flags in the STS register by clearing the register but
* preserving the SELFTEST_DONE and TPM_FAMILY_MASK flags and then setting
* the new flags.
*
* The SELFTEST_DONE flag is acquired from the backend that determines it by
* peeking into TPM commands.
*
* A VM suspend/resume will preserve the flag by storing it into the VM
* device state, but the backend will not remember it when QEMU is started
* again. Therefore, we cache the flag here. Once set, it will not be unset
* except by a reset.
*/
static void tpm_tis_sts_set(TPMLocality *l, uint32_t flags)
{
l->sts &= TPM_TIS_STS_SELFTEST_DONE | TPM_TIS_STS_TPM_FAMILY_MASK;
l->sts |= flags;
}
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/*
* Send a request to the TPM.
*/
static void tpm_tis_tpm_send(TPMState *s, uint8_t locty)
{
tpm_util_show_buffer(s->buffer, s->be_buffer_size, "To TPM");
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/*
* rw_offset serves as length indicator for length of data;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
* it's reset when the response comes back
*/
s->loc[locty].state = TPM_TIS_STATE_EXECUTION;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
s->cmd = (TPMBackendCmd) {
.locty = locty,
.in = s->buffer,
.in_len = s->rw_offset,
.out = s->buffer,
.out_len = s->be_buffer_size,
};
tpm_backend_deliver_request(s->be_driver, &s->cmd);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
/* raise an interrupt if allowed */
static void tpm_tis_raise_irq(TPMState *s, uint8_t locty, uint32_t irqmask)
{
if (!TPM_TIS_IS_VALID_LOCTY(locty)) {
return;
}
if ((s->loc[locty].inte & TPM_TIS_INT_ENABLED) &&
(s->loc[locty].inte & irqmask)) {
trace_tpm_tis_raise_irq(irqmask);
qemu_irq_raise(s->irq);
s->loc[locty].ints |= irqmask;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
}
static uint32_t tpm_tis_check_request_use_except(TPMState *s, uint8_t locty)
{
uint8_t l;
for (l = 0; l < TPM_TIS_NUM_LOCALITIES; l++) {
if (l == locty) {
continue;
}
if ((s->loc[l].access & TPM_TIS_ACCESS_REQUEST_USE)) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
return 1;
}
}
return 0;
}
static void tpm_tis_new_active_locality(TPMState *s, uint8_t new_active_locty)
{
bool change = (s->active_locty != new_active_locty);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
bool is_seize;
uint8_t mask;
if (change && TPM_TIS_IS_VALID_LOCTY(s->active_locty)) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
is_seize = TPM_TIS_IS_VALID_LOCTY(new_active_locty) &&
s->loc[new_active_locty].access & TPM_TIS_ACCESS_SEIZE;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
if (is_seize) {
mask = ~(TPM_TIS_ACCESS_ACTIVE_LOCALITY);
} else {
mask = ~(TPM_TIS_ACCESS_ACTIVE_LOCALITY|
TPM_TIS_ACCESS_REQUEST_USE);
}
/* reset flags on the old active locality */
s->loc[s->active_locty].access &= mask;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
if (is_seize) {
s->loc[s->active_locty].access |= TPM_TIS_ACCESS_BEEN_SEIZED;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
}
s->active_locty = new_active_locty;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
trace_tpm_tis_new_active_locality(s->active_locty);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
if (TPM_TIS_IS_VALID_LOCTY(new_active_locty)) {
/* set flags on the new active locality */
s->loc[new_active_locty].access |= TPM_TIS_ACCESS_ACTIVE_LOCALITY;
s->loc[new_active_locty].access &= ~(TPM_TIS_ACCESS_REQUEST_USE |
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
TPM_TIS_ACCESS_SEIZE);
}
if (change) {
tpm_tis_raise_irq(s, s->active_locty, TPM_TIS_INT_LOCALITY_CHANGED);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
}
/* abort -- this function switches the locality */
static void tpm_tis_abort(TPMState *s)
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
{
s->rw_offset = 0;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
trace_tpm_tis_abort(s->next_locty);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/*
* Need to react differently depending on who's aborting now and
* which locality will become active afterwards.
*/
if (s->aborting_locty == s->next_locty) {
s->loc[s->aborting_locty].state = TPM_TIS_STATE_READY;
tpm_tis_sts_set(&s->loc[s->aborting_locty],
TPM_TIS_STS_COMMAND_READY);
tpm_tis_raise_irq(s, s->aborting_locty, TPM_TIS_INT_COMMAND_READY);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
/* locality after abort is another one than the current one */
tpm_tis_new_active_locality(s, s->next_locty);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
s->next_locty = TPM_TIS_NO_LOCALITY;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* nobody's aborting a command anymore */
s->aborting_locty = TPM_TIS_NO_LOCALITY;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
/* prepare aborting current command */
static void tpm_tis_prep_abort(TPMState *s, uint8_t locty, uint8_t newlocty)
{
uint8_t busy_locty;
assert(TPM_TIS_IS_VALID_LOCTY(newlocty));
s->aborting_locty = locty; /* may also be TPM_TIS_NO_LOCALITY */
s->next_locty = newlocty; /* locality after successful abort */
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/*
* only abort a command using an interrupt if currently executing
* a command AND if there's a valid connection to the vTPM.
*/
for (busy_locty = 0; busy_locty < TPM_TIS_NUM_LOCALITIES; busy_locty++) {
if (s->loc[busy_locty].state == TPM_TIS_STATE_EXECUTION) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/*
* request the backend to cancel. Some backends may not
* support it
*/
tpm_backend_cancel_cmd(s->be_driver);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
return;
}
}
tpm_tis_abort(s);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
/*
* Callback from the TPM to indicate that the response was received.
*/
void tpm_tis_request_completed(TPMState *s, int ret)
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
{
uint8_t locty = s->cmd.locty;
uint8_t l;
assert(TPM_TIS_IS_VALID_LOCTY(locty));
if (s->cmd.selftest_done) {
for (l = 0; l < TPM_TIS_NUM_LOCALITIES; l++) {
s->loc[l].sts |= TPM_TIS_STS_SELFTEST_DONE;
}
}
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* FIXME: report error if ret != 0 */
tpm_tis_sts_set(&s->loc[locty],
TPM_TIS_STS_VALID | TPM_TIS_STS_DATA_AVAILABLE);
s->loc[locty].state = TPM_TIS_STATE_COMPLETION;
s->rw_offset = 0;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
tpm_util_show_buffer(s->buffer, s->be_buffer_size, "From TPM");
if (TPM_TIS_IS_VALID_LOCTY(s->next_locty)) {
tpm_tis_abort(s);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
tpm_tis_raise_irq(s, locty,
TPM_TIS_INT_DATA_AVAILABLE | TPM_TIS_INT_STS_VALID);
}
/*
* Read a byte of response data
*/
static uint32_t tpm_tis_data_read(TPMState *s, uint8_t locty)
{
uint32_t ret = TPM_TIS_NO_DATA_BYTE;
uint16_t len;
if ((s->loc[locty].sts & TPM_TIS_STS_DATA_AVAILABLE)) {
len = MIN(tpm_cmd_get_size(&s->buffer),
s->be_buffer_size);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
ret = s->buffer[s->rw_offset++];
if (s->rw_offset >= len) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* got last byte */
tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
tpm_tis_raise_irq(s, locty, TPM_TIS_INT_STS_VALID);
}
trace_tpm_tis_data_read(ret, s->rw_offset - 1);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
return ret;
}
#ifdef DEBUG_TIS
static void tpm_tis_dump_state(TPMState *s, hwaddr addr)
{
static const unsigned regs[] = {
TPM_TIS_REG_ACCESS,
TPM_TIS_REG_INT_ENABLE,
TPM_TIS_REG_INT_VECTOR,
TPM_TIS_REG_INT_STATUS,
TPM_TIS_REG_INTF_CAPABILITY,
TPM_TIS_REG_STS,
TPM_TIS_REG_DID_VID,
TPM_TIS_REG_RID,
0xfff};
int idx;
uint8_t locty = tpm_tis_locality_from_addr(addr);
hwaddr base = addr & ~0xfff;
printf("tpm_tis: active locality : %d\n"
"tpm_tis: state of locality %d : %d\n"
"tpm_tis: register dump:\n",
s->active_locty,
locty, s->loc[locty].state);
for (idx = 0; regs[idx] != 0xfff; idx++) {
printf("tpm_tis: 0x%04x : 0x%08x\n", regs[idx],
(int)tpm_tis_mmio_read(s, base + regs[idx], 4));
}
printf("tpm_tis: r/w offset : %d\n"
"tpm_tis: result buffer : ",
s->rw_offset);
for (idx = 0;
idx < MIN(tpm_cmd_get_size(&s->buffer), s->be_buffer_size);
idx++) {
printf("%c%02x%s",
s->rw_offset == idx ? '>' : ' ',
s->buffer[idx],
((idx & 0xf) == 0xf) ? "\ntpm_tis: " : "");
}
printf("\n");
}
#endif
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/*
* Read a register of the TIS interface
* See specs pages 33-63 for description of the registers
*/
static uint64_t tpm_tis_mmio_read(void *opaque, hwaddr addr,
unsigned size)
{
TPMState *s = opaque;
uint16_t offset = addr & 0xffc;
uint8_t shift = (addr & 0x3) * 8;
uint32_t val = 0xffffffff;
uint8_t locty = tpm_tis_locality_from_addr(addr);
uint32_t avail;
uint8_t v;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
if (tpm_backend_had_startup_error(s->be_driver)) {
return 0;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
switch (offset) {
case TPM_TIS_REG_ACCESS:
/* never show the SEIZE flag even though we use it internally */
val = s->loc[locty].access & ~TPM_TIS_ACCESS_SEIZE;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* the pending flag is always calculated */
if (tpm_tis_check_request_use_except(s, locty)) {
val |= TPM_TIS_ACCESS_PENDING_REQUEST;
}
val |= !tpm_backend_get_tpm_established_flag(s->be_driver);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
case TPM_TIS_REG_INT_ENABLE:
val = s->loc[locty].inte;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
case TPM_TIS_REG_INT_VECTOR:
val = s->irq_num;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
case TPM_TIS_REG_INT_STATUS:
val = s->loc[locty].ints;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
case TPM_TIS_REG_INTF_CAPABILITY:
switch (s->be_tpm_version) {
case TPM_VERSION_UNSPEC:
val = 0;
break;
case TPM_VERSION_1_2:
val = TPM_TIS_CAPABILITIES_SUPPORTED1_3;
break;
case TPM_VERSION_2_0:
val = TPM_TIS_CAPABILITIES_SUPPORTED2_0;
break;
}
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
case TPM_TIS_REG_STS:
if (s->active_locty == locty) {
if ((s->loc[locty].sts & TPM_TIS_STS_DATA_AVAILABLE)) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
val = TPM_TIS_BURST_COUNT(
MIN(tpm_cmd_get_size(&s->buffer),
s->be_buffer_size)
- s->rw_offset) | s->loc[locty].sts;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
} else {
avail = s->be_buffer_size - s->rw_offset;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/*
* byte-sized reads should not return 0x00 for 0x100
* available bytes.
*/
if (size == 1 && avail > 0xff) {
avail = 0xff;
}
val = TPM_TIS_BURST_COUNT(avail) | s->loc[locty].sts;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
}
break;
case TPM_TIS_REG_DATA_FIFO:
case TPM_TIS_REG_DATA_XFIFO ... TPM_TIS_REG_DATA_XFIFO_END:
if (s->active_locty == locty) {
if (size > 4 - (addr & 0x3)) {
/* prevent access beyond FIFO */
size = 4 - (addr & 0x3);
}
val = 0;
shift = 0;
while (size > 0) {
switch (s->loc[locty].state) {
case TPM_TIS_STATE_COMPLETION:
v = tpm_tis_data_read(s, locty);
break;
default:
v = TPM_TIS_NO_DATA_BYTE;
break;
}
val |= (v << shift);
shift += 8;
size--;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
shift = 0; /* no more adjustments */
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
break;
case TPM_TIS_REG_INTERFACE_ID:
val = s->loc[locty].iface_id;
break;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
case TPM_TIS_REG_DID_VID:
val = (TPM_TIS_TPM_DID << 16) | TPM_TIS_TPM_VID;
break;
case TPM_TIS_REG_RID:
val = TPM_TIS_TPM_RID;
break;
#ifdef DEBUG_TIS
case TPM_TIS_REG_DEBUG:
tpm_tis_dump_state(s, addr);
break;
#endif
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
if (shift) {
val >>= shift;
}
trace_tpm_tis_mmio_read(size, addr, val);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
return val;
}
/*
* Write a value to a register of the TIS interface
* See specs pages 33-63 for description of the registers
*/
static void tpm_tis_mmio_write(void *opaque, hwaddr addr,
uint64_t val, unsigned size)
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
{
TPMState *s = opaque;
uint16_t off = addr & 0xffc;
uint8_t shift = (addr & 0x3) * 8;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
uint8_t locty = tpm_tis_locality_from_addr(addr);
uint8_t active_locty, l;
int c, set_new_locty = 1;
uint16_t len;
uint32_t mask = (size == 1) ? 0xff : ((size == 2) ? 0xffff : ~0);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
trace_tpm_tis_mmio_write(size, addr, val);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
if (locty == 4) {
trace_tpm_tis_mmio_write_locty4();
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
return;
}
if (tpm_backend_had_startup_error(s->be_driver)) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
return;
}
val &= mask;
if (shift) {
val <<= shift;
mask <<= shift;
}
mask ^= 0xffffffff;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
switch (off) {
case TPM_TIS_REG_ACCESS:
if ((val & TPM_TIS_ACCESS_SEIZE)) {
val &= ~(TPM_TIS_ACCESS_REQUEST_USE |
TPM_TIS_ACCESS_ACTIVE_LOCALITY);
}
active_locty = s->active_locty;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
if ((val & TPM_TIS_ACCESS_ACTIVE_LOCALITY)) {
/* give up locality if currently owned */
if (s->active_locty == locty) {
trace_tpm_tis_mmio_write_release_locty(locty);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
uint8_t newlocty = TPM_TIS_NO_LOCALITY;
/* anybody wants the locality ? */
for (c = TPM_TIS_NUM_LOCALITIES - 1; c >= 0; c--) {
if ((s->loc[c].access & TPM_TIS_ACCESS_REQUEST_USE)) {
trace_tpm_tis_mmio_write_locty_req_use(c);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
newlocty = c;
break;
}
}
trace_tpm_tis_mmio_write_next_locty(newlocty);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
if (TPM_TIS_IS_VALID_LOCTY(newlocty)) {
set_new_locty = 0;
tpm_tis_prep_abort(s, locty, newlocty);
} else {
active_locty = TPM_TIS_NO_LOCALITY;
}
} else {
/* not currently the owner; clear a pending request */
s->loc[locty].access &= ~TPM_TIS_ACCESS_REQUEST_USE;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
}
if ((val & TPM_TIS_ACCESS_BEEN_SEIZED)) {
s->loc[locty].access &= ~TPM_TIS_ACCESS_BEEN_SEIZED;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
if ((val & TPM_TIS_ACCESS_SEIZE)) {
/*
* allow seize if a locality is active and the requesting
* locality is higher than the one that's active
* OR
* allow seize for requesting locality if no locality is
* active
*/
while ((TPM_TIS_IS_VALID_LOCTY(s->active_locty) &&
locty > s->active_locty) ||
!TPM_TIS_IS_VALID_LOCTY(s->active_locty)) {
bool higher_seize = false;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* already a pending SEIZE ? */
if ((s->loc[locty].access & TPM_TIS_ACCESS_SEIZE)) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
}
/* check for ongoing seize by a higher locality */
for (l = locty + 1; l < TPM_TIS_NUM_LOCALITIES; l++) {
if ((s->loc[l].access & TPM_TIS_ACCESS_SEIZE)) {
higher_seize = true;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
}
}
if (higher_seize) {
break;
}
/* cancel any seize by a lower locality */
for (l = 0; l < locty; l++) {
s->loc[l].access &= ~TPM_TIS_ACCESS_SEIZE;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
s->loc[locty].access |= TPM_TIS_ACCESS_SEIZE;
trace_tpm_tis_mmio_write_locty_seized(locty, s->active_locty);
trace_tpm_tis_mmio_write_init_abort();
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
set_new_locty = 0;
tpm_tis_prep_abort(s, s->active_locty, locty);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
}
}
if ((val & TPM_TIS_ACCESS_REQUEST_USE)) {
if (s->active_locty != locty) {
if (TPM_TIS_IS_VALID_LOCTY(s->active_locty)) {
s->loc[locty].access |= TPM_TIS_ACCESS_REQUEST_USE;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
} else {
/* no locality active -> make this one active now */
active_locty = locty;
}
}
}
if (set_new_locty) {
tpm_tis_new_active_locality(s, active_locty);
}
break;
case TPM_TIS_REG_INT_ENABLE:
if (s->active_locty != locty) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
}
s->loc[locty].inte &= mask;
s->loc[locty].inte |= (val & (TPM_TIS_INT_ENABLED |
TPM_TIS_INT_POLARITY_MASK |
TPM_TIS_INTERRUPTS_SUPPORTED));
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
case TPM_TIS_REG_INT_VECTOR:
/* hard wired -- ignore */
break;
case TPM_TIS_REG_INT_STATUS:
if (s->active_locty != locty) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
}
/* clearing of interrupt flags */
if (((val & TPM_TIS_INTERRUPTS_SUPPORTED)) &&
(s->loc[locty].ints & TPM_TIS_INTERRUPTS_SUPPORTED)) {
s->loc[locty].ints &= ~val;
if (s->loc[locty].ints == 0) {
qemu_irq_lower(s->irq);
trace_tpm_tis_mmio_write_lowering_irq();
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
}
s->loc[locty].ints &= ~(val & TPM_TIS_INTERRUPTS_SUPPORTED);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
case TPM_TIS_REG_STS:
if (s->active_locty != locty) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
}
if (s->be_tpm_version == TPM_VERSION_2_0) {
/* some flags that are only supported for TPM 2 */
if (val & TPM_TIS_STS_COMMAND_CANCEL) {
if (s->loc[locty].state == TPM_TIS_STATE_EXECUTION) {
/*
* request the backend to cancel. Some backends may not
* support it
*/
tpm_backend_cancel_cmd(s->be_driver);
}
}
if (val & TPM_TIS_STS_RESET_ESTABLISHMENT_BIT) {
if (locty == 3 || locty == 4) {
tpm_backend_reset_tpm_established_flag(s->be_driver, locty);
}
}
}
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
val &= (TPM_TIS_STS_COMMAND_READY | TPM_TIS_STS_TPM_GO |
TPM_TIS_STS_RESPONSE_RETRY);
if (val == TPM_TIS_STS_COMMAND_READY) {
switch (s->loc[locty].state) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
case TPM_TIS_STATE_READY:
s->rw_offset = 0;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
case TPM_TIS_STATE_IDLE:
tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_COMMAND_READY);
s->loc[locty].state = TPM_TIS_STATE_READY;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
tpm_tis_raise_irq(s, locty, TPM_TIS_INT_COMMAND_READY);
break;
case TPM_TIS_STATE_EXECUTION:
case TPM_TIS_STATE_RECEPTION:
/* abort currently running command */
trace_tpm_tis_mmio_write_init_abort();
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
tpm_tis_prep_abort(s, locty, locty);
break;
case TPM_TIS_STATE_COMPLETION:
s->rw_offset = 0;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* shortcut to ready state with C/R set */
s->loc[locty].state = TPM_TIS_STATE_READY;
if (!(s->loc[locty].sts & TPM_TIS_STS_COMMAND_READY)) {
tpm_tis_sts_set(&s->loc[locty],
TPM_TIS_STS_COMMAND_READY);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
tpm_tis_raise_irq(s, locty, TPM_TIS_INT_COMMAND_READY);
}
s->loc[locty].sts &= ~(TPM_TIS_STS_DATA_AVAILABLE);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
}
} else if (val == TPM_TIS_STS_TPM_GO) {
switch (s->loc[locty].state) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
case TPM_TIS_STATE_RECEPTION:
if ((s->loc[locty].sts & TPM_TIS_STS_EXPECT) == 0) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
tpm_tis_tpm_send(s, locty);
}
break;
default:
/* ignore */
break;
}
} else if (val == TPM_TIS_STS_RESPONSE_RETRY) {
switch (s->loc[locty].state) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
case TPM_TIS_STATE_COMPLETION:
s->rw_offset = 0;
tpm_tis_sts_set(&s->loc[locty],
TPM_TIS_STS_VALID|
TPM_TIS_STS_DATA_AVAILABLE);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
default:
/* ignore */
break;
}
}
break;
case TPM_TIS_REG_DATA_FIFO:
case TPM_TIS_REG_DATA_XFIFO ... TPM_TIS_REG_DATA_XFIFO_END:
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* data fifo */
if (s->active_locty != locty) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
break;
}
if (s->loc[locty].state == TPM_TIS_STATE_IDLE ||
s->loc[locty].state == TPM_TIS_STATE_EXECUTION ||
s->loc[locty].state == TPM_TIS_STATE_COMPLETION) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* drop the byte */
} else {
trace_tpm_tis_mmio_write_data2send(val, size);
if (s->loc[locty].state == TPM_TIS_STATE_READY) {
s->loc[locty].state = TPM_TIS_STATE_RECEPTION;
tpm_tis_sts_set(&s->loc[locty],
TPM_TIS_STS_EXPECT | TPM_TIS_STS_VALID);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
val >>= shift;
if (size > 4 - (addr & 0x3)) {
/* prevent access beyond FIFO */
size = 4 - (addr & 0x3);
}
while ((s->loc[locty].sts & TPM_TIS_STS_EXPECT) && size > 0) {
if (s->rw_offset < s->be_buffer_size) {
s->buffer[s->rw_offset++] =
(uint8_t)val;
val >>= 8;
size--;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
} else {
tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
}
/* check for complete packet */
if (s->rw_offset > 5 &&
(s->loc[locty].sts & TPM_TIS_STS_EXPECT)) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/* we have a packet length - see if we have all of it */
bool need_irq = !(s->loc[locty].sts & TPM_TIS_STS_VALID);
len = tpm_cmd_get_size(&s->buffer);
if (len > s->rw_offset) {
tpm_tis_sts_set(&s->loc[locty],
TPM_TIS_STS_EXPECT | TPM_TIS_STS_VALID);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
} else {
/* packet complete */
tpm_tis_sts_set(&s->loc[locty], TPM_TIS_STS_VALID);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
if (need_irq) {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
tpm_tis_raise_irq(s, locty, TPM_TIS_INT_STS_VALID);
}
}
}
break;
case TPM_TIS_REG_INTERFACE_ID:
if (val & TPM_TIS_IFACE_ID_INT_SEL_LOCK) {
for (l = 0; l < TPM_TIS_NUM_LOCALITIES; l++) {
s->loc[l].iface_id |= TPM_TIS_IFACE_ID_INT_SEL_LOCK;
}
}
break;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
}
const MemoryRegionOps tpm_tis_memory_ops = {
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
.read = tpm_tis_mmio_read,
.write = tpm_tis_mmio_write,
.endianness = DEVICE_LITTLE_ENDIAN,
.valid = {
.min_access_size = 1,
.max_access_size = 4,
},
};
/*
* Get the TPMVersion of the backend device being used
*/
enum TPMVersion tpm_tis_get_tpm_version(TPMState *s)
{
if (tpm_backend_had_startup_error(s->be_driver)) {
return TPM_VERSION_UNSPEC;
}
return tpm_backend_get_tpm_version(s->be_driver);
}
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
/*
* This function is called when the machine starts, resets or due to
* S3 resume.
*/
void tpm_tis_reset(TPMState *s)
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
{
int c;
s->be_tpm_version = tpm_backend_get_tpm_version(s->be_driver);
s->be_buffer_size = MIN(tpm_backend_get_buffer_size(s->be_driver),
TPM_TIS_BUFFER_MAX);
if (s->ppi_enabled) {
tpm_ppi_reset(&s->ppi);
}
tpm_backend_reset(s->be_driver);
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
s->active_locty = TPM_TIS_NO_LOCALITY;
s->next_locty = TPM_TIS_NO_LOCALITY;
s->aborting_locty = TPM_TIS_NO_LOCALITY;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
for (c = 0; c < TPM_TIS_NUM_LOCALITIES; c++) {
s->loc[c].access = TPM_TIS_ACCESS_TPM_REG_VALID_STS;
switch (s->be_tpm_version) {
case TPM_VERSION_UNSPEC:
break;
case TPM_VERSION_1_2:
s->loc[c].sts = TPM_TIS_STS_TPM_FAMILY1_2;
s->loc[c].iface_id = TPM_TIS_IFACE_ID_SUPPORTED_FLAGS1_3;
break;
case TPM_VERSION_2_0:
s->loc[c].sts = TPM_TIS_STS_TPM_FAMILY2_0;
s->loc[c].iface_id = TPM_TIS_IFACE_ID_SUPPORTED_FLAGS2_0;
break;
}
s->loc[c].inte = TPM_TIS_INT_POLARITY_LOW_LEVEL;
s->loc[c].ints = 0;
s->loc[c].state = TPM_TIS_STATE_IDLE;
s->rw_offset = 0;
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
if (tpm_backend_startup_tpm(s->be_driver, s->be_buffer_size) < 0) {
exit(1);
}
Add TPM (frontend) hardware interface (TPM TIS) to QEMU This patch adds the main code of the TPM frontend driver, the TPM TIS interface, to QEMU. The code is largely based on the previous implementation for Xen but has been significantly extended to meet the standard's requirements, such as the support for changing of localities and all the functionality of the available flags. Communication with the backend (i.e., for Xen or the libtpms-based one) is cleanly separated through an interface which the backend driver needs to implement. Whenever the frontend has collected a complete packet, it will submit a task to the backend, which then starts processing the command. Once the result has been returned, the backend invokes a callback function (tpm_tis_receive_cb()). Testing the proper functioning of the different flags and localities cannot be done from user space when running in Linux for example, since access to the address space of the TPM TIS interface is not possible. Also the Linux driver itself does not exercise all functionality. So, for testing there is a fairly extensive test suite as part of the SeaBIOS patches since from within the BIOS one can have full access to all the TPM's registers. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Reviewed-by: Corey Bryant <coreyb@linux.vnet.ibm.com> Reviewed-by: Joel Schopp <jschopp@linux.vnet.ibm.com> Message-id: 1361987275-26289-3-git-send-email-stefanb@linux.vnet.ibm.com Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2013-02-28 01:47:50 +08:00
}
/* persistent state handling */
int tpm_tis_pre_save(TPMState *s)
{
uint8_t locty = s->active_locty;
trace_tpm_tis_pre_save(locty, s->rw_offset);
if (DEBUG_TIS) {
tpm_tis_dump_state(s, 0);
}
/*
* Synchronize with backend completion.
*/
tpm_backend_finish_sync(s->be_driver);
return 0;
}
const VMStateDescription vmstate_locty = {
.name = "tpm-tis/locty",
.version_id = 0,
.fields = (VMStateField[]) {
VMSTATE_UINT32(state, TPMLocality),
VMSTATE_UINT32(inte, TPMLocality),
VMSTATE_UINT32(ints, TPMLocality),
VMSTATE_UINT8(access, TPMLocality),
VMSTATE_UINT32(sts, TPMLocality),
VMSTATE_UINT32(iface_id, TPMLocality),
VMSTATE_END_OF_LIST(),
}
};