mirror of https://gitee.com/openkylin/linux.git
KVM: Move assigned device code to own file
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity
parent
367e1319b2
commit
bfd99ff5d4
|
|
@ -49,7 +49,7 @@ EXTRA_CFLAGS += -Ivirt/kvm -Iarch/ia64/kvm/
|
|||
EXTRA_AFLAGS += -Ivirt/kvm -Iarch/ia64/kvm/
|
||||
|
||||
common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \
|
||||
coalesced_mmio.o irq_comm.o)
|
||||
coalesced_mmio.o irq_comm.o assigned-dev.o)
|
||||
|
||||
ifeq ($(CONFIG_IOMMU_API),y)
|
||||
common-objs += $(addprefix ../../../virt/kvm/, iommu.o)
|
||||
|
|
|
|||
|
|
@ -6,7 +6,8 @@ CFLAGS_svm.o := -I.
|
|||
CFLAGS_vmx.o := -I.
|
||||
|
||||
kvm-y += $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \
|
||||
coalesced_mmio.o irq_comm.o eventfd.o)
|
||||
coalesced_mmio.o irq_comm.o eventfd.o \
|
||||
assigned-dev.o)
|
||||
kvm-$(CONFIG_IOMMU_API) += $(addprefix ../../../virt/kvm/, iommu.o)
|
||||
|
||||
kvm-y += x86.o mmu.o emulate.o i8259.o irq.o lapic.o \
|
||||
|
|
|
|||
|
|
@ -577,4 +577,21 @@ static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu)
|
|||
return vcpu->kvm->bsp_vcpu_id == vcpu->vcpu_id;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef __KVM_HAVE_DEVICE_ASSIGNMENT
|
||||
|
||||
long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
|
||||
unsigned long arg);
|
||||
|
||||
#else
|
||||
|
||||
static inline long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
|
||||
unsigned long arg)
|
||||
{
|
||||
return -ENOTTY;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
#endif
|
||||
|
||||
|
|
|
|||
|
|
@ -0,0 +1,818 @@
|
|||
/*
|
||||
* Kernel-based Virtual Machine - device assignment support
|
||||
*
|
||||
* Copyright (C) 2006-9 Red Hat, Inc
|
||||
*
|
||||
* This work is licensed under the terms of the GNU GPL, version 2. See
|
||||
* the COPYING file in the top-level directory.
|
||||
*
|
||||
*/
|
||||
|
||||
#include <linux/kvm_host.h>
|
||||
#include <linux/kvm.h>
|
||||
#include <linux/uaccess.h>
|
||||
#include <linux/vmalloc.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/spinlock.h>
|
||||
#include <linux/pci.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include "irq.h"
|
||||
|
||||
static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
|
||||
int assigned_dev_id)
|
||||
{
|
||||
struct list_head *ptr;
|
||||
struct kvm_assigned_dev_kernel *match;
|
||||
|
||||
list_for_each(ptr, head) {
|
||||
match = list_entry(ptr, struct kvm_assigned_dev_kernel, list);
|
||||
if (match->assigned_dev_id == assigned_dev_id)
|
||||
return match;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int find_index_from_host_irq(struct kvm_assigned_dev_kernel
|
||||
*assigned_dev, int irq)
|
||||
{
|
||||
int i, index;
|
||||
struct msix_entry *host_msix_entries;
|
||||
|
||||
host_msix_entries = assigned_dev->host_msix_entries;
|
||||
|
||||
index = -1;
|
||||
for (i = 0; i < assigned_dev->entries_nr; i++)
|
||||
if (irq == host_msix_entries[i].vector) {
|
||||
index = i;
|
||||
break;
|
||||
}
|
||||
if (index < 0) {
|
||||
printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
return index;
|
||||
}
|
||||
|
||||
static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work)
|
||||
{
|
||||
struct kvm_assigned_dev_kernel *assigned_dev;
|
||||
struct kvm *kvm;
|
||||
int i;
|
||||
|
||||
assigned_dev = container_of(work, struct kvm_assigned_dev_kernel,
|
||||
interrupt_work);
|
||||
kvm = assigned_dev->kvm;
|
||||
|
||||
spin_lock_irq(&assigned_dev->assigned_dev_lock);
|
||||
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
|
||||
struct kvm_guest_msix_entry *guest_entries =
|
||||
assigned_dev->guest_msix_entries;
|
||||
for (i = 0; i < assigned_dev->entries_nr; i++) {
|
||||
if (!(guest_entries[i].flags &
|
||||
KVM_ASSIGNED_MSIX_PENDING))
|
||||
continue;
|
||||
guest_entries[i].flags &= ~KVM_ASSIGNED_MSIX_PENDING;
|
||||
kvm_set_irq(assigned_dev->kvm,
|
||||
assigned_dev->irq_source_id,
|
||||
guest_entries[i].vector, 1);
|
||||
}
|
||||
} else
|
||||
kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
|
||||
assigned_dev->guest_irq, 1);
|
||||
|
||||
spin_unlock_irq(&assigned_dev->assigned_dev_lock);
|
||||
}
|
||||
|
||||
static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id)
|
||||
{
|
||||
unsigned long flags;
|
||||
struct kvm_assigned_dev_kernel *assigned_dev =
|
||||
(struct kvm_assigned_dev_kernel *) dev_id;
|
||||
|
||||
spin_lock_irqsave(&assigned_dev->assigned_dev_lock, flags);
|
||||
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
|
||||
int index = find_index_from_host_irq(assigned_dev, irq);
|
||||
if (index < 0)
|
||||
goto out;
|
||||
assigned_dev->guest_msix_entries[index].flags |=
|
||||
KVM_ASSIGNED_MSIX_PENDING;
|
||||
}
|
||||
|
||||
schedule_work(&assigned_dev->interrupt_work);
|
||||
|
||||
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) {
|
||||
disable_irq_nosync(irq);
|
||||
assigned_dev->host_irq_disabled = true;
|
||||
}
|
||||
|
||||
out:
|
||||
spin_unlock_irqrestore(&assigned_dev->assigned_dev_lock, flags);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/* Ack the irq line for an assigned device */
|
||||
static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian)
|
||||
{
|
||||
struct kvm_assigned_dev_kernel *dev;
|
||||
unsigned long flags;
|
||||
|
||||
if (kian->gsi == -1)
|
||||
return;
|
||||
|
||||
dev = container_of(kian, struct kvm_assigned_dev_kernel,
|
||||
ack_notifier);
|
||||
|
||||
kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0);
|
||||
|
||||
/* The guest irq may be shared so this ack may be
|
||||
* from another device.
|
||||
*/
|
||||
spin_lock_irqsave(&dev->assigned_dev_lock, flags);
|
||||
if (dev->host_irq_disabled) {
|
||||
enable_irq(dev->host_irq);
|
||||
dev->host_irq_disabled = false;
|
||||
}
|
||||
spin_unlock_irqrestore(&dev->assigned_dev_lock, flags);
|
||||
}
|
||||
|
||||
static void deassign_guest_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *assigned_dev)
|
||||
{
|
||||
kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier);
|
||||
assigned_dev->ack_notifier.gsi = -1;
|
||||
|
||||
if (assigned_dev->irq_source_id != -1)
|
||||
kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id);
|
||||
assigned_dev->irq_source_id = -1;
|
||||
assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_GUEST_MASK);
|
||||
}
|
||||
|
||||
/* The function implicit hold kvm->lock mutex due to cancel_work_sync() */
|
||||
static void deassign_host_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *assigned_dev)
|
||||
{
|
||||
/*
|
||||
* In kvm_free_device_irq, cancel_work_sync return true if:
|
||||
* 1. work is scheduled, and then cancelled.
|
||||
* 2. work callback is executed.
|
||||
*
|
||||
* The first one ensured that the irq is disabled and no more events
|
||||
* would happen. But for the second one, the irq may be enabled (e.g.
|
||||
* for MSI). So we disable irq here to prevent further events.
|
||||
*
|
||||
* Notice this maybe result in nested disable if the interrupt type is
|
||||
* INTx, but it's OK for we are going to free it.
|
||||
*
|
||||
* If this function is a part of VM destroy, please ensure that till
|
||||
* now, the kvm state is still legal for probably we also have to wait
|
||||
* interrupt_work done.
|
||||
*/
|
||||
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
|
||||
int i;
|
||||
for (i = 0; i < assigned_dev->entries_nr; i++)
|
||||
disable_irq_nosync(assigned_dev->
|
||||
host_msix_entries[i].vector);
|
||||
|
||||
cancel_work_sync(&assigned_dev->interrupt_work);
|
||||
|
||||
for (i = 0; i < assigned_dev->entries_nr; i++)
|
||||
free_irq(assigned_dev->host_msix_entries[i].vector,
|
||||
(void *)assigned_dev);
|
||||
|
||||
assigned_dev->entries_nr = 0;
|
||||
kfree(assigned_dev->host_msix_entries);
|
||||
kfree(assigned_dev->guest_msix_entries);
|
||||
pci_disable_msix(assigned_dev->dev);
|
||||
} else {
|
||||
/* Deal with MSI and INTx */
|
||||
disable_irq_nosync(assigned_dev->host_irq);
|
||||
cancel_work_sync(&assigned_dev->interrupt_work);
|
||||
|
||||
free_irq(assigned_dev->host_irq, (void *)assigned_dev);
|
||||
|
||||
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI)
|
||||
pci_disable_msi(assigned_dev->dev);
|
||||
}
|
||||
|
||||
assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_HOST_MASK);
|
||||
}
|
||||
|
||||
static int kvm_deassign_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *assigned_dev,
|
||||
unsigned long irq_requested_type)
|
||||
{
|
||||
unsigned long guest_irq_type, host_irq_type;
|
||||
|
||||
if (!irqchip_in_kernel(kvm))
|
||||
return -EINVAL;
|
||||
/* no irq assignment to deassign */
|
||||
if (!assigned_dev->irq_requested_type)
|
||||
return -ENXIO;
|
||||
|
||||
host_irq_type = irq_requested_type & KVM_DEV_IRQ_HOST_MASK;
|
||||
guest_irq_type = irq_requested_type & KVM_DEV_IRQ_GUEST_MASK;
|
||||
|
||||
if (host_irq_type)
|
||||
deassign_host_irq(kvm, assigned_dev);
|
||||
if (guest_irq_type)
|
||||
deassign_guest_irq(kvm, assigned_dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void kvm_free_assigned_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *assigned_dev)
|
||||
{
|
||||
kvm_deassign_irq(kvm, assigned_dev, assigned_dev->irq_requested_type);
|
||||
}
|
||||
|
||||
static void kvm_free_assigned_device(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel
|
||||
*assigned_dev)
|
||||
{
|
||||
kvm_free_assigned_irq(kvm, assigned_dev);
|
||||
|
||||
pci_reset_function(assigned_dev->dev);
|
||||
|
||||
pci_release_regions(assigned_dev->dev);
|
||||
pci_disable_device(assigned_dev->dev);
|
||||
pci_dev_put(assigned_dev->dev);
|
||||
|
||||
list_del(&assigned_dev->list);
|
||||
kfree(assigned_dev);
|
||||
}
|
||||
|
||||
void kvm_free_all_assigned_devices(struct kvm *kvm)
|
||||
{
|
||||
struct list_head *ptr, *ptr2;
|
||||
struct kvm_assigned_dev_kernel *assigned_dev;
|
||||
|
||||
list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) {
|
||||
assigned_dev = list_entry(ptr,
|
||||
struct kvm_assigned_dev_kernel,
|
||||
list);
|
||||
|
||||
kvm_free_assigned_device(kvm, assigned_dev);
|
||||
}
|
||||
}
|
||||
|
||||
static int assigned_device_enable_host_intx(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev)
|
||||
{
|
||||
dev->host_irq = dev->dev->irq;
|
||||
/* Even though this is PCI, we don't want to use shared
|
||||
* interrupts. Sharing host devices with guest-assigned devices
|
||||
* on the same interrupt line is not a happy situation: there
|
||||
* are going to be long delays in accepting, acking, etc.
|
||||
*/
|
||||
if (request_irq(dev->host_irq, kvm_assigned_dev_intr,
|
||||
0, "kvm_assigned_intx_device", (void *)dev))
|
||||
return -EIO;
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef __KVM_HAVE_MSI
|
||||
static int assigned_device_enable_host_msi(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev)
|
||||
{
|
||||
int r;
|
||||
|
||||
if (!dev->dev->msi_enabled) {
|
||||
r = pci_enable_msi(dev->dev);
|
||||
if (r)
|
||||
return r;
|
||||
}
|
||||
|
||||
dev->host_irq = dev->dev->irq;
|
||||
if (request_irq(dev->host_irq, kvm_assigned_dev_intr, 0,
|
||||
"kvm_assigned_msi_device", (void *)dev)) {
|
||||
pci_disable_msi(dev->dev);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
static int assigned_device_enable_host_msix(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev)
|
||||
{
|
||||
int i, r = -EINVAL;
|
||||
|
||||
/* host_msix_entries and guest_msix_entries should have been
|
||||
* initialized */
|
||||
if (dev->entries_nr == 0)
|
||||
return r;
|
||||
|
||||
r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr);
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
for (i = 0; i < dev->entries_nr; i++) {
|
||||
r = request_irq(dev->host_msix_entries[i].vector,
|
||||
kvm_assigned_dev_intr, 0,
|
||||
"kvm_assigned_msix_device",
|
||||
(void *)dev);
|
||||
/* FIXME: free requested_irq's on failure */
|
||||
if (r)
|
||||
return r;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
static int assigned_device_enable_guest_intx(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev,
|
||||
struct kvm_assigned_irq *irq)
|
||||
{
|
||||
dev->guest_irq = irq->guest_irq;
|
||||
dev->ack_notifier.gsi = irq->guest_irq;
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef __KVM_HAVE_MSI
|
||||
static int assigned_device_enable_guest_msi(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev,
|
||||
struct kvm_assigned_irq *irq)
|
||||
{
|
||||
dev->guest_irq = irq->guest_irq;
|
||||
dev->ack_notifier.gsi = -1;
|
||||
dev->host_irq_disabled = false;
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
static int assigned_device_enable_guest_msix(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev,
|
||||
struct kvm_assigned_irq *irq)
|
||||
{
|
||||
dev->guest_irq = irq->guest_irq;
|
||||
dev->ack_notifier.gsi = -1;
|
||||
dev->host_irq_disabled = false;
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int assign_host_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev,
|
||||
__u32 host_irq_type)
|
||||
{
|
||||
int r = -EEXIST;
|
||||
|
||||
if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK)
|
||||
return r;
|
||||
|
||||
switch (host_irq_type) {
|
||||
case KVM_DEV_IRQ_HOST_INTX:
|
||||
r = assigned_device_enable_host_intx(kvm, dev);
|
||||
break;
|
||||
#ifdef __KVM_HAVE_MSI
|
||||
case KVM_DEV_IRQ_HOST_MSI:
|
||||
r = assigned_device_enable_host_msi(kvm, dev);
|
||||
break;
|
||||
#endif
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
case KVM_DEV_IRQ_HOST_MSIX:
|
||||
r = assigned_device_enable_host_msix(kvm, dev);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
r = -EINVAL;
|
||||
}
|
||||
|
||||
if (!r)
|
||||
dev->irq_requested_type |= host_irq_type;
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
static int assign_guest_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev,
|
||||
struct kvm_assigned_irq *irq,
|
||||
unsigned long guest_irq_type)
|
||||
{
|
||||
int id;
|
||||
int r = -EEXIST;
|
||||
|
||||
if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK)
|
||||
return r;
|
||||
|
||||
id = kvm_request_irq_source_id(kvm);
|
||||
if (id < 0)
|
||||
return id;
|
||||
|
||||
dev->irq_source_id = id;
|
||||
|
||||
switch (guest_irq_type) {
|
||||
case KVM_DEV_IRQ_GUEST_INTX:
|
||||
r = assigned_device_enable_guest_intx(kvm, dev, irq);
|
||||
break;
|
||||
#ifdef __KVM_HAVE_MSI
|
||||
case KVM_DEV_IRQ_GUEST_MSI:
|
||||
r = assigned_device_enable_guest_msi(kvm, dev, irq);
|
||||
break;
|
||||
#endif
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
case KVM_DEV_IRQ_GUEST_MSIX:
|
||||
r = assigned_device_enable_guest_msix(kvm, dev, irq);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
r = -EINVAL;
|
||||
}
|
||||
|
||||
if (!r) {
|
||||
dev->irq_requested_type |= guest_irq_type;
|
||||
kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier);
|
||||
} else
|
||||
kvm_free_irq_source_id(kvm, dev->irq_source_id);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
/* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */
|
||||
static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_irq *assigned_irq)
|
||||
{
|
||||
int r = -EINVAL;
|
||||
struct kvm_assigned_dev_kernel *match;
|
||||
unsigned long host_irq_type, guest_irq_type;
|
||||
|
||||
if (!capable(CAP_SYS_RAWIO))
|
||||
return -EPERM;
|
||||
|
||||
if (!irqchip_in_kernel(kvm))
|
||||
return r;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
r = -ENODEV;
|
||||
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
assigned_irq->assigned_dev_id);
|
||||
if (!match)
|
||||
goto out;
|
||||
|
||||
host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK);
|
||||
guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK);
|
||||
|
||||
r = -EINVAL;
|
||||
/* can only assign one type at a time */
|
||||
if (hweight_long(host_irq_type) > 1)
|
||||
goto out;
|
||||
if (hweight_long(guest_irq_type) > 1)
|
||||
goto out;
|
||||
if (host_irq_type == 0 && guest_irq_type == 0)
|
||||
goto out;
|
||||
|
||||
r = 0;
|
||||
if (host_irq_type)
|
||||
r = assign_host_irq(kvm, match, host_irq_type);
|
||||
if (r)
|
||||
goto out;
|
||||
|
||||
if (guest_irq_type)
|
||||
r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type);
|
||||
out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_irq
|
||||
*assigned_irq)
|
||||
{
|
||||
int r = -ENODEV;
|
||||
struct kvm_assigned_dev_kernel *match;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
|
||||
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
assigned_irq->assigned_dev_id);
|
||||
if (!match)
|
||||
goto out;
|
||||
|
||||
r = kvm_deassign_irq(kvm, match, assigned_irq->flags);
|
||||
out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
|
||||
struct kvm_assigned_pci_dev *assigned_dev)
|
||||
{
|
||||
int r = 0;
|
||||
struct kvm_assigned_dev_kernel *match;
|
||||
struct pci_dev *dev;
|
||||
|
||||
down_read(&kvm->slots_lock);
|
||||
mutex_lock(&kvm->lock);
|
||||
|
||||
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
assigned_dev->assigned_dev_id);
|
||||
if (match) {
|
||||
/* device already assigned */
|
||||
r = -EEXIST;
|
||||
goto out;
|
||||
}
|
||||
|
||||
match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL);
|
||||
if (match == NULL) {
|
||||
printk(KERN_INFO "%s: Couldn't allocate memory\n",
|
||||
__func__);
|
||||
r = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
dev = pci_get_bus_and_slot(assigned_dev->busnr,
|
||||
assigned_dev->devfn);
|
||||
if (!dev) {
|
||||
printk(KERN_INFO "%s: host device not found\n", __func__);
|
||||
r = -EINVAL;
|
||||
goto out_free;
|
||||
}
|
||||
if (pci_enable_device(dev)) {
|
||||
printk(KERN_INFO "%s: Could not enable PCI device\n", __func__);
|
||||
r = -EBUSY;
|
||||
goto out_put;
|
||||
}
|
||||
r = pci_request_regions(dev, "kvm_assigned_device");
|
||||
if (r) {
|
||||
printk(KERN_INFO "%s: Could not get access to device regions\n",
|
||||
__func__);
|
||||
goto out_disable;
|
||||
}
|
||||
|
||||
pci_reset_function(dev);
|
||||
|
||||
match->assigned_dev_id = assigned_dev->assigned_dev_id;
|
||||
match->host_busnr = assigned_dev->busnr;
|
||||
match->host_devfn = assigned_dev->devfn;
|
||||
match->flags = assigned_dev->flags;
|
||||
match->dev = dev;
|
||||
spin_lock_init(&match->assigned_dev_lock);
|
||||
match->irq_source_id = -1;
|
||||
match->kvm = kvm;
|
||||
match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq;
|
||||
INIT_WORK(&match->interrupt_work,
|
||||
kvm_assigned_dev_interrupt_work_handler);
|
||||
|
||||
list_add(&match->list, &kvm->arch.assigned_dev_head);
|
||||
|
||||
if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) {
|
||||
if (!kvm->arch.iommu_domain) {
|
||||
r = kvm_iommu_map_guest(kvm);
|
||||
if (r)
|
||||
goto out_list_del;
|
||||
}
|
||||
r = kvm_assign_device(kvm, match);
|
||||
if (r)
|
||||
goto out_list_del;
|
||||
}
|
||||
|
||||
out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
up_read(&kvm->slots_lock);
|
||||
return r;
|
||||
out_list_del:
|
||||
list_del(&match->list);
|
||||
pci_release_regions(dev);
|
||||
out_disable:
|
||||
pci_disable_device(dev);
|
||||
out_put:
|
||||
pci_dev_put(dev);
|
||||
out_free:
|
||||
kfree(match);
|
||||
mutex_unlock(&kvm->lock);
|
||||
up_read(&kvm->slots_lock);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int kvm_vm_ioctl_deassign_device(struct kvm *kvm,
|
||||
struct kvm_assigned_pci_dev *assigned_dev)
|
||||
{
|
||||
int r = 0;
|
||||
struct kvm_assigned_dev_kernel *match;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
|
||||
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
assigned_dev->assigned_dev_id);
|
||||
if (!match) {
|
||||
printk(KERN_INFO "%s: device hasn't been assigned before, "
|
||||
"so cannot be deassigned\n", __func__);
|
||||
r = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
|
||||
kvm_deassign_device(kvm, match);
|
||||
|
||||
kvm_free_assigned_device(kvm, match);
|
||||
|
||||
out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
return r;
|
||||
}
|
||||
|
||||
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm,
|
||||
struct kvm_assigned_msix_nr *entry_nr)
|
||||
{
|
||||
int r = 0;
|
||||
struct kvm_assigned_dev_kernel *adev;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
|
||||
adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
entry_nr->assigned_dev_id);
|
||||
if (!adev) {
|
||||
r = -EINVAL;
|
||||
goto msix_nr_out;
|
||||
}
|
||||
|
||||
if (adev->entries_nr == 0) {
|
||||
adev->entries_nr = entry_nr->entry_nr;
|
||||
if (adev->entries_nr == 0 ||
|
||||
adev->entries_nr >= KVM_MAX_MSIX_PER_DEV) {
|
||||
r = -EINVAL;
|
||||
goto msix_nr_out;
|
||||
}
|
||||
|
||||
adev->host_msix_entries = kzalloc(sizeof(struct msix_entry) *
|
||||
entry_nr->entry_nr,
|
||||
GFP_KERNEL);
|
||||
if (!adev->host_msix_entries) {
|
||||
r = -ENOMEM;
|
||||
goto msix_nr_out;
|
||||
}
|
||||
adev->guest_msix_entries = kzalloc(
|
||||
sizeof(struct kvm_guest_msix_entry) *
|
||||
entry_nr->entry_nr, GFP_KERNEL);
|
||||
if (!adev->guest_msix_entries) {
|
||||
kfree(adev->host_msix_entries);
|
||||
r = -ENOMEM;
|
||||
goto msix_nr_out;
|
||||
}
|
||||
} else /* Not allowed set MSI-X number twice */
|
||||
r = -EINVAL;
|
||||
msix_nr_out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm,
|
||||
struct kvm_assigned_msix_entry *entry)
|
||||
{
|
||||
int r = 0, i;
|
||||
struct kvm_assigned_dev_kernel *adev;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
|
||||
adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
entry->assigned_dev_id);
|
||||
|
||||
if (!adev) {
|
||||
r = -EINVAL;
|
||||
goto msix_entry_out;
|
||||
}
|
||||
|
||||
for (i = 0; i < adev->entries_nr; i++)
|
||||
if (adev->guest_msix_entries[i].vector == 0 ||
|
||||
adev->guest_msix_entries[i].entry == entry->entry) {
|
||||
adev->guest_msix_entries[i].entry = entry->entry;
|
||||
adev->guest_msix_entries[i].vector = entry->gsi;
|
||||
adev->host_msix_entries[i].entry = entry->entry;
|
||||
break;
|
||||
}
|
||||
if (i == adev->entries_nr) {
|
||||
r = -ENOSPC;
|
||||
goto msix_entry_out;
|
||||
}
|
||||
|
||||
msix_entry_out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
|
||||
return r;
|
||||
}
|
||||
#endif
|
||||
|
||||
long kvm_vm_ioctl_assigned_device(struct kvm *kvm, unsigned ioctl,
|
||||
unsigned long arg)
|
||||
{
|
||||
void __user *argp = (void __user *)arg;
|
||||
int r = -ENOTTY;
|
||||
|
||||
switch (ioctl) {
|
||||
case KVM_ASSIGN_PCI_DEVICE: {
|
||||
struct kvm_assigned_pci_dev assigned_dev;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
case KVM_ASSIGN_IRQ: {
|
||||
r = -EOPNOTSUPP;
|
||||
break;
|
||||
}
|
||||
#ifdef KVM_CAP_ASSIGN_DEV_IRQ
|
||||
case KVM_ASSIGN_DEV_IRQ: {
|
||||
struct kvm_assigned_irq assigned_irq;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
case KVM_DEASSIGN_DEV_IRQ: {
|
||||
struct kvm_assigned_irq assigned_irq;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_deassign_dev_irq(kvm, &assigned_irq);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
|
||||
case KVM_DEASSIGN_PCI_DEVICE: {
|
||||
struct kvm_assigned_pci_dev assigned_dev;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
#ifdef KVM_CAP_IRQ_ROUTING
|
||||
case KVM_SET_GSI_ROUTING: {
|
||||
struct kvm_irq_routing routing;
|
||||
struct kvm_irq_routing __user *urouting;
|
||||
struct kvm_irq_routing_entry *entries;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&routing, argp, sizeof(routing)))
|
||||
goto out;
|
||||
r = -EINVAL;
|
||||
if (routing.nr >= KVM_MAX_IRQ_ROUTES)
|
||||
goto out;
|
||||
if (routing.flags)
|
||||
goto out;
|
||||
r = -ENOMEM;
|
||||
entries = vmalloc(routing.nr * sizeof(*entries));
|
||||
if (!entries)
|
||||
goto out;
|
||||
r = -EFAULT;
|
||||
urouting = argp;
|
||||
if (copy_from_user(entries, urouting->entries,
|
||||
routing.nr * sizeof(*entries)))
|
||||
goto out_free_irq_routing;
|
||||
r = kvm_set_irq_routing(kvm, entries, routing.nr,
|
||||
routing.flags);
|
||||
out_free_irq_routing:
|
||||
vfree(entries);
|
||||
break;
|
||||
}
|
||||
#endif /* KVM_CAP_IRQ_ROUTING */
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
case KVM_ASSIGN_SET_MSIX_NR: {
|
||||
struct kvm_assigned_msix_nr entry_nr;
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&entry_nr, argp, sizeof entry_nr))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_set_msix_nr(kvm, &entry_nr);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
case KVM_ASSIGN_SET_MSIX_ENTRY: {
|
||||
struct kvm_assigned_msix_entry entry;
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&entry, argp, sizeof entry))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_set_msix_entry(kvm, &entry);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
}
|
||||
out:
|
||||
return r;
|
||||
}
|
||||
|
||||
|
|
@ -53,12 +53,6 @@
|
|||
#include "coalesced_mmio.h"
|
||||
#endif
|
||||
|
||||
#ifdef KVM_CAP_DEVICE_ASSIGNMENT
|
||||
#include <linux/pci.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include "irq.h"
|
||||
#endif
|
||||
|
||||
#define CREATE_TRACE_POINTS
|
||||
#include <trace/events/kvm.h>
|
||||
|
||||
|
|
@ -90,608 +84,6 @@ static bool kvm_rebooting;
|
|||
|
||||
static bool largepages_enabled = true;
|
||||
|
||||
#ifdef KVM_CAP_DEVICE_ASSIGNMENT
|
||||
static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
|
||||
int assigned_dev_id)
|
||||
{
|
||||
struct list_head *ptr;
|
||||
struct kvm_assigned_dev_kernel *match;
|
||||
|
||||
list_for_each(ptr, head) {
|
||||
match = list_entry(ptr, struct kvm_assigned_dev_kernel, list);
|
||||
if (match->assigned_dev_id == assigned_dev_id)
|
||||
return match;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int find_index_from_host_irq(struct kvm_assigned_dev_kernel
|
||||
*assigned_dev, int irq)
|
||||
{
|
||||
int i, index;
|
||||
struct msix_entry *host_msix_entries;
|
||||
|
||||
host_msix_entries = assigned_dev->host_msix_entries;
|
||||
|
||||
index = -1;
|
||||
for (i = 0; i < assigned_dev->entries_nr; i++)
|
||||
if (irq == host_msix_entries[i].vector) {
|
||||
index = i;
|
||||
break;
|
||||
}
|
||||
if (index < 0) {
|
||||
printk(KERN_WARNING "Fail to find correlated MSI-X entry!\n");
|
||||
return 0;
|
||||
}
|
||||
|
||||
return index;
|
||||
}
|
||||
|
||||
static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work)
|
||||
{
|
||||
struct kvm_assigned_dev_kernel *assigned_dev;
|
||||
struct kvm *kvm;
|
||||
int i;
|
||||
|
||||
assigned_dev = container_of(work, struct kvm_assigned_dev_kernel,
|
||||
interrupt_work);
|
||||
kvm = assigned_dev->kvm;
|
||||
|
||||
spin_lock_irq(&assigned_dev->assigned_dev_lock);
|
||||
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
|
||||
struct kvm_guest_msix_entry *guest_entries =
|
||||
assigned_dev->guest_msix_entries;
|
||||
for (i = 0; i < assigned_dev->entries_nr; i++) {
|
||||
if (!(guest_entries[i].flags &
|
||||
KVM_ASSIGNED_MSIX_PENDING))
|
||||
continue;
|
||||
guest_entries[i].flags &= ~KVM_ASSIGNED_MSIX_PENDING;
|
||||
kvm_set_irq(assigned_dev->kvm,
|
||||
assigned_dev->irq_source_id,
|
||||
guest_entries[i].vector, 1);
|
||||
}
|
||||
} else
|
||||
kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
|
||||
assigned_dev->guest_irq, 1);
|
||||
|
||||
spin_unlock_irq(&assigned_dev->assigned_dev_lock);
|
||||
}
|
||||
|
||||
static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id)
|
||||
{
|
||||
unsigned long flags;
|
||||
struct kvm_assigned_dev_kernel *assigned_dev =
|
||||
(struct kvm_assigned_dev_kernel *) dev_id;
|
||||
|
||||
spin_lock_irqsave(&assigned_dev->assigned_dev_lock, flags);
|
||||
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
|
||||
int index = find_index_from_host_irq(assigned_dev, irq);
|
||||
if (index < 0)
|
||||
goto out;
|
||||
assigned_dev->guest_msix_entries[index].flags |=
|
||||
KVM_ASSIGNED_MSIX_PENDING;
|
||||
}
|
||||
|
||||
schedule_work(&assigned_dev->interrupt_work);
|
||||
|
||||
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_GUEST_INTX) {
|
||||
disable_irq_nosync(irq);
|
||||
assigned_dev->host_irq_disabled = true;
|
||||
}
|
||||
|
||||
out:
|
||||
spin_unlock_irqrestore(&assigned_dev->assigned_dev_lock, flags);
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
/* Ack the irq line for an assigned device */
|
||||
static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian)
|
||||
{
|
||||
struct kvm_assigned_dev_kernel *dev;
|
||||
unsigned long flags;
|
||||
|
||||
if (kian->gsi == -1)
|
||||
return;
|
||||
|
||||
dev = container_of(kian, struct kvm_assigned_dev_kernel,
|
||||
ack_notifier);
|
||||
|
||||
kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0);
|
||||
|
||||
/* The guest irq may be shared so this ack may be
|
||||
* from another device.
|
||||
*/
|
||||
spin_lock_irqsave(&dev->assigned_dev_lock, flags);
|
||||
if (dev->host_irq_disabled) {
|
||||
enable_irq(dev->host_irq);
|
||||
dev->host_irq_disabled = false;
|
||||
}
|
||||
spin_unlock_irqrestore(&dev->assigned_dev_lock, flags);
|
||||
}
|
||||
|
||||
static void deassign_guest_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *assigned_dev)
|
||||
{
|
||||
kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier);
|
||||
assigned_dev->ack_notifier.gsi = -1;
|
||||
|
||||
if (assigned_dev->irq_source_id != -1)
|
||||
kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id);
|
||||
assigned_dev->irq_source_id = -1;
|
||||
assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_GUEST_MASK);
|
||||
}
|
||||
|
||||
/* The function implicit hold kvm->lock mutex due to cancel_work_sync() */
|
||||
static void deassign_host_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *assigned_dev)
|
||||
{
|
||||
/*
|
||||
* In kvm_free_device_irq, cancel_work_sync return true if:
|
||||
* 1. work is scheduled, and then cancelled.
|
||||
* 2. work callback is executed.
|
||||
*
|
||||
* The first one ensured that the irq is disabled and no more events
|
||||
* would happen. But for the second one, the irq may be enabled (e.g.
|
||||
* for MSI). So we disable irq here to prevent further events.
|
||||
*
|
||||
* Notice this maybe result in nested disable if the interrupt type is
|
||||
* INTx, but it's OK for we are going to free it.
|
||||
*
|
||||
* If this function is a part of VM destroy, please ensure that till
|
||||
* now, the kvm state is still legal for probably we also have to wait
|
||||
* interrupt_work done.
|
||||
*/
|
||||
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSIX) {
|
||||
int i;
|
||||
for (i = 0; i < assigned_dev->entries_nr; i++)
|
||||
disable_irq_nosync(assigned_dev->
|
||||
host_msix_entries[i].vector);
|
||||
|
||||
cancel_work_sync(&assigned_dev->interrupt_work);
|
||||
|
||||
for (i = 0; i < assigned_dev->entries_nr; i++)
|
||||
free_irq(assigned_dev->host_msix_entries[i].vector,
|
||||
(void *)assigned_dev);
|
||||
|
||||
assigned_dev->entries_nr = 0;
|
||||
kfree(assigned_dev->host_msix_entries);
|
||||
kfree(assigned_dev->guest_msix_entries);
|
||||
pci_disable_msix(assigned_dev->dev);
|
||||
} else {
|
||||
/* Deal with MSI and INTx */
|
||||
disable_irq_nosync(assigned_dev->host_irq);
|
||||
cancel_work_sync(&assigned_dev->interrupt_work);
|
||||
|
||||
free_irq(assigned_dev->host_irq, (void *)assigned_dev);
|
||||
|
||||
if (assigned_dev->irq_requested_type & KVM_DEV_IRQ_HOST_MSI)
|
||||
pci_disable_msi(assigned_dev->dev);
|
||||
}
|
||||
|
||||
assigned_dev->irq_requested_type &= ~(KVM_DEV_IRQ_HOST_MASK);
|
||||
}
|
||||
|
||||
static int kvm_deassign_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *assigned_dev,
|
||||
unsigned long irq_requested_type)
|
||||
{
|
||||
unsigned long guest_irq_type, host_irq_type;
|
||||
|
||||
if (!irqchip_in_kernel(kvm))
|
||||
return -EINVAL;
|
||||
/* no irq assignment to deassign */
|
||||
if (!assigned_dev->irq_requested_type)
|
||||
return -ENXIO;
|
||||
|
||||
host_irq_type = irq_requested_type & KVM_DEV_IRQ_HOST_MASK;
|
||||
guest_irq_type = irq_requested_type & KVM_DEV_IRQ_GUEST_MASK;
|
||||
|
||||
if (host_irq_type)
|
||||
deassign_host_irq(kvm, assigned_dev);
|
||||
if (guest_irq_type)
|
||||
deassign_guest_irq(kvm, assigned_dev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void kvm_free_assigned_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *assigned_dev)
|
||||
{
|
||||
kvm_deassign_irq(kvm, assigned_dev, assigned_dev->irq_requested_type);
|
||||
}
|
||||
|
||||
static void kvm_free_assigned_device(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel
|
||||
*assigned_dev)
|
||||
{
|
||||
kvm_free_assigned_irq(kvm, assigned_dev);
|
||||
|
||||
pci_reset_function(assigned_dev->dev);
|
||||
|
||||
pci_release_regions(assigned_dev->dev);
|
||||
pci_disable_device(assigned_dev->dev);
|
||||
pci_dev_put(assigned_dev->dev);
|
||||
|
||||
list_del(&assigned_dev->list);
|
||||
kfree(assigned_dev);
|
||||
}
|
||||
|
||||
void kvm_free_all_assigned_devices(struct kvm *kvm)
|
||||
{
|
||||
struct list_head *ptr, *ptr2;
|
||||
struct kvm_assigned_dev_kernel *assigned_dev;
|
||||
|
||||
list_for_each_safe(ptr, ptr2, &kvm->arch.assigned_dev_head) {
|
||||
assigned_dev = list_entry(ptr,
|
||||
struct kvm_assigned_dev_kernel,
|
||||
list);
|
||||
|
||||
kvm_free_assigned_device(kvm, assigned_dev);
|
||||
}
|
||||
}
|
||||
|
||||
static int assigned_device_enable_host_intx(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev)
|
||||
{
|
||||
dev->host_irq = dev->dev->irq;
|
||||
/* Even though this is PCI, we don't want to use shared
|
||||
* interrupts. Sharing host devices with guest-assigned devices
|
||||
* on the same interrupt line is not a happy situation: there
|
||||
* are going to be long delays in accepting, acking, etc.
|
||||
*/
|
||||
if (request_irq(dev->host_irq, kvm_assigned_dev_intr,
|
||||
0, "kvm_assigned_intx_device", (void *)dev))
|
||||
return -EIO;
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef __KVM_HAVE_MSI
|
||||
static int assigned_device_enable_host_msi(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev)
|
||||
{
|
||||
int r;
|
||||
|
||||
if (!dev->dev->msi_enabled) {
|
||||
r = pci_enable_msi(dev->dev);
|
||||
if (r)
|
||||
return r;
|
||||
}
|
||||
|
||||
dev->host_irq = dev->dev->irq;
|
||||
if (request_irq(dev->host_irq, kvm_assigned_dev_intr, 0,
|
||||
"kvm_assigned_msi_device", (void *)dev)) {
|
||||
pci_disable_msi(dev->dev);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
static int assigned_device_enable_host_msix(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev)
|
||||
{
|
||||
int i, r = -EINVAL;
|
||||
|
||||
/* host_msix_entries and guest_msix_entries should have been
|
||||
* initialized */
|
||||
if (dev->entries_nr == 0)
|
||||
return r;
|
||||
|
||||
r = pci_enable_msix(dev->dev, dev->host_msix_entries, dev->entries_nr);
|
||||
if (r)
|
||||
return r;
|
||||
|
||||
for (i = 0; i < dev->entries_nr; i++) {
|
||||
r = request_irq(dev->host_msix_entries[i].vector,
|
||||
kvm_assigned_dev_intr, 0,
|
||||
"kvm_assigned_msix_device",
|
||||
(void *)dev);
|
||||
/* FIXME: free requested_irq's on failure */
|
||||
if (r)
|
||||
return r;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
static int assigned_device_enable_guest_intx(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev,
|
||||
struct kvm_assigned_irq *irq)
|
||||
{
|
||||
dev->guest_irq = irq->guest_irq;
|
||||
dev->ack_notifier.gsi = irq->guest_irq;
|
||||
return 0;
|
||||
}
|
||||
|
||||
#ifdef __KVM_HAVE_MSI
|
||||
static int assigned_device_enable_guest_msi(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev,
|
||||
struct kvm_assigned_irq *irq)
|
||||
{
|
||||
dev->guest_irq = irq->guest_irq;
|
||||
dev->ack_notifier.gsi = -1;
|
||||
dev->host_irq_disabled = false;
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
static int assigned_device_enable_guest_msix(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev,
|
||||
struct kvm_assigned_irq *irq)
|
||||
{
|
||||
dev->guest_irq = irq->guest_irq;
|
||||
dev->ack_notifier.gsi = -1;
|
||||
dev->host_irq_disabled = false;
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int assign_host_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev,
|
||||
__u32 host_irq_type)
|
||||
{
|
||||
int r = -EEXIST;
|
||||
|
||||
if (dev->irq_requested_type & KVM_DEV_IRQ_HOST_MASK)
|
||||
return r;
|
||||
|
||||
switch (host_irq_type) {
|
||||
case KVM_DEV_IRQ_HOST_INTX:
|
||||
r = assigned_device_enable_host_intx(kvm, dev);
|
||||
break;
|
||||
#ifdef __KVM_HAVE_MSI
|
||||
case KVM_DEV_IRQ_HOST_MSI:
|
||||
r = assigned_device_enable_host_msi(kvm, dev);
|
||||
break;
|
||||
#endif
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
case KVM_DEV_IRQ_HOST_MSIX:
|
||||
r = assigned_device_enable_host_msix(kvm, dev);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
r = -EINVAL;
|
||||
}
|
||||
|
||||
if (!r)
|
||||
dev->irq_requested_type |= host_irq_type;
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
static int assign_guest_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_dev_kernel *dev,
|
||||
struct kvm_assigned_irq *irq,
|
||||
unsigned long guest_irq_type)
|
||||
{
|
||||
int id;
|
||||
int r = -EEXIST;
|
||||
|
||||
if (dev->irq_requested_type & KVM_DEV_IRQ_GUEST_MASK)
|
||||
return r;
|
||||
|
||||
id = kvm_request_irq_source_id(kvm);
|
||||
if (id < 0)
|
||||
return id;
|
||||
|
||||
dev->irq_source_id = id;
|
||||
|
||||
switch (guest_irq_type) {
|
||||
case KVM_DEV_IRQ_GUEST_INTX:
|
||||
r = assigned_device_enable_guest_intx(kvm, dev, irq);
|
||||
break;
|
||||
#ifdef __KVM_HAVE_MSI
|
||||
case KVM_DEV_IRQ_GUEST_MSI:
|
||||
r = assigned_device_enable_guest_msi(kvm, dev, irq);
|
||||
break;
|
||||
#endif
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
case KVM_DEV_IRQ_GUEST_MSIX:
|
||||
r = assigned_device_enable_guest_msix(kvm, dev, irq);
|
||||
break;
|
||||
#endif
|
||||
default:
|
||||
r = -EINVAL;
|
||||
}
|
||||
|
||||
if (!r) {
|
||||
dev->irq_requested_type |= guest_irq_type;
|
||||
kvm_register_irq_ack_notifier(kvm, &dev->ack_notifier);
|
||||
} else
|
||||
kvm_free_irq_source_id(kvm, dev->irq_source_id);
|
||||
|
||||
return r;
|
||||
}
|
||||
|
||||
/* TODO Deal with KVM_DEV_IRQ_ASSIGNED_MASK_MSIX */
|
||||
static int kvm_vm_ioctl_assign_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_irq *assigned_irq)
|
||||
{
|
||||
int r = -EINVAL;
|
||||
struct kvm_assigned_dev_kernel *match;
|
||||
unsigned long host_irq_type, guest_irq_type;
|
||||
|
||||
if (!capable(CAP_SYS_RAWIO))
|
||||
return -EPERM;
|
||||
|
||||
if (!irqchip_in_kernel(kvm))
|
||||
return r;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
r = -ENODEV;
|
||||
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
assigned_irq->assigned_dev_id);
|
||||
if (!match)
|
||||
goto out;
|
||||
|
||||
host_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_HOST_MASK);
|
||||
guest_irq_type = (assigned_irq->flags & KVM_DEV_IRQ_GUEST_MASK);
|
||||
|
||||
r = -EINVAL;
|
||||
/* can only assign one type at a time */
|
||||
if (hweight_long(host_irq_type) > 1)
|
||||
goto out;
|
||||
if (hweight_long(guest_irq_type) > 1)
|
||||
goto out;
|
||||
if (host_irq_type == 0 && guest_irq_type == 0)
|
||||
goto out;
|
||||
|
||||
r = 0;
|
||||
if (host_irq_type)
|
||||
r = assign_host_irq(kvm, match, host_irq_type);
|
||||
if (r)
|
||||
goto out;
|
||||
|
||||
if (guest_irq_type)
|
||||
r = assign_guest_irq(kvm, match, assigned_irq, guest_irq_type);
|
||||
out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int kvm_vm_ioctl_deassign_dev_irq(struct kvm *kvm,
|
||||
struct kvm_assigned_irq
|
||||
*assigned_irq)
|
||||
{
|
||||
int r = -ENODEV;
|
||||
struct kvm_assigned_dev_kernel *match;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
|
||||
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
assigned_irq->assigned_dev_id);
|
||||
if (!match)
|
||||
goto out;
|
||||
|
||||
r = kvm_deassign_irq(kvm, match, assigned_irq->flags);
|
||||
out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int kvm_vm_ioctl_assign_device(struct kvm *kvm,
|
||||
struct kvm_assigned_pci_dev *assigned_dev)
|
||||
{
|
||||
int r = 0;
|
||||
struct kvm_assigned_dev_kernel *match;
|
||||
struct pci_dev *dev;
|
||||
|
||||
down_read(&kvm->slots_lock);
|
||||
mutex_lock(&kvm->lock);
|
||||
|
||||
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
assigned_dev->assigned_dev_id);
|
||||
if (match) {
|
||||
/* device already assigned */
|
||||
r = -EEXIST;
|
||||
goto out;
|
||||
}
|
||||
|
||||
match = kzalloc(sizeof(struct kvm_assigned_dev_kernel), GFP_KERNEL);
|
||||
if (match == NULL) {
|
||||
printk(KERN_INFO "%s: Couldn't allocate memory\n",
|
||||
__func__);
|
||||
r = -ENOMEM;
|
||||
goto out;
|
||||
}
|
||||
dev = pci_get_bus_and_slot(assigned_dev->busnr,
|
||||
assigned_dev->devfn);
|
||||
if (!dev) {
|
||||
printk(KERN_INFO "%s: host device not found\n", __func__);
|
||||
r = -EINVAL;
|
||||
goto out_free;
|
||||
}
|
||||
if (pci_enable_device(dev)) {
|
||||
printk(KERN_INFO "%s: Could not enable PCI device\n", __func__);
|
||||
r = -EBUSY;
|
||||
goto out_put;
|
||||
}
|
||||
r = pci_request_regions(dev, "kvm_assigned_device");
|
||||
if (r) {
|
||||
printk(KERN_INFO "%s: Could not get access to device regions\n",
|
||||
__func__);
|
||||
goto out_disable;
|
||||
}
|
||||
|
||||
pci_reset_function(dev);
|
||||
|
||||
match->assigned_dev_id = assigned_dev->assigned_dev_id;
|
||||
match->host_busnr = assigned_dev->busnr;
|
||||
match->host_devfn = assigned_dev->devfn;
|
||||
match->flags = assigned_dev->flags;
|
||||
match->dev = dev;
|
||||
spin_lock_init(&match->assigned_dev_lock);
|
||||
match->irq_source_id = -1;
|
||||
match->kvm = kvm;
|
||||
match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq;
|
||||
INIT_WORK(&match->interrupt_work,
|
||||
kvm_assigned_dev_interrupt_work_handler);
|
||||
|
||||
list_add(&match->list, &kvm->arch.assigned_dev_head);
|
||||
|
||||
if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) {
|
||||
if (!kvm->arch.iommu_domain) {
|
||||
r = kvm_iommu_map_guest(kvm);
|
||||
if (r)
|
||||
goto out_list_del;
|
||||
}
|
||||
r = kvm_assign_device(kvm, match);
|
||||
if (r)
|
||||
goto out_list_del;
|
||||
}
|
||||
|
||||
out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
up_read(&kvm->slots_lock);
|
||||
return r;
|
||||
out_list_del:
|
||||
list_del(&match->list);
|
||||
pci_release_regions(dev);
|
||||
out_disable:
|
||||
pci_disable_device(dev);
|
||||
out_put:
|
||||
pci_dev_put(dev);
|
||||
out_free:
|
||||
kfree(match);
|
||||
mutex_unlock(&kvm->lock);
|
||||
up_read(&kvm->slots_lock);
|
||||
return r;
|
||||
}
|
||||
#endif
|
||||
|
||||
#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
|
||||
static int kvm_vm_ioctl_deassign_device(struct kvm *kvm,
|
||||
struct kvm_assigned_pci_dev *assigned_dev)
|
||||
{
|
||||
int r = 0;
|
||||
struct kvm_assigned_dev_kernel *match;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
|
||||
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
assigned_dev->assigned_dev_id);
|
||||
if (!match) {
|
||||
printk(KERN_INFO "%s: device hasn't been assigned before, "
|
||||
"so cannot be deassigned\n", __func__);
|
||||
r = -EINVAL;
|
||||
goto out;
|
||||
}
|
||||
|
||||
if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
|
||||
kvm_deassign_device(kvm, match);
|
||||
|
||||
kvm_free_assigned_device(kvm, match);
|
||||
|
||||
out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
return r;
|
||||
}
|
||||
#endif
|
||||
|
||||
inline int kvm_is_mmio_pfn(pfn_t pfn)
|
||||
{
|
||||
if (pfn_valid(pfn)) {
|
||||
|
|
@ -1824,88 +1216,6 @@ static int kvm_vcpu_ioctl_set_sigmask(struct kvm_vcpu *vcpu, sigset_t *sigset)
|
|||
return 0;
|
||||
}
|
||||
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
static int kvm_vm_ioctl_set_msix_nr(struct kvm *kvm,
|
||||
struct kvm_assigned_msix_nr *entry_nr)
|
||||
{
|
||||
int r = 0;
|
||||
struct kvm_assigned_dev_kernel *adev;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
|
||||
adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
entry_nr->assigned_dev_id);
|
||||
if (!adev) {
|
||||
r = -EINVAL;
|
||||
goto msix_nr_out;
|
||||
}
|
||||
|
||||
if (adev->entries_nr == 0) {
|
||||
adev->entries_nr = entry_nr->entry_nr;
|
||||
if (adev->entries_nr == 0 ||
|
||||
adev->entries_nr >= KVM_MAX_MSIX_PER_DEV) {
|
||||
r = -EINVAL;
|
||||
goto msix_nr_out;
|
||||
}
|
||||
|
||||
adev->host_msix_entries = kzalloc(sizeof(struct msix_entry) *
|
||||
entry_nr->entry_nr,
|
||||
GFP_KERNEL);
|
||||
if (!adev->host_msix_entries) {
|
||||
r = -ENOMEM;
|
||||
goto msix_nr_out;
|
||||
}
|
||||
adev->guest_msix_entries = kzalloc(
|
||||
sizeof(struct kvm_guest_msix_entry) *
|
||||
entry_nr->entry_nr, GFP_KERNEL);
|
||||
if (!adev->guest_msix_entries) {
|
||||
kfree(adev->host_msix_entries);
|
||||
r = -ENOMEM;
|
||||
goto msix_nr_out;
|
||||
}
|
||||
} else /* Not allowed set MSI-X number twice */
|
||||
r = -EINVAL;
|
||||
msix_nr_out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
return r;
|
||||
}
|
||||
|
||||
static int kvm_vm_ioctl_set_msix_entry(struct kvm *kvm,
|
||||
struct kvm_assigned_msix_entry *entry)
|
||||
{
|
||||
int r = 0, i;
|
||||
struct kvm_assigned_dev_kernel *adev;
|
||||
|
||||
mutex_lock(&kvm->lock);
|
||||
|
||||
adev = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
|
||||
entry->assigned_dev_id);
|
||||
|
||||
if (!adev) {
|
||||
r = -EINVAL;
|
||||
goto msix_entry_out;
|
||||
}
|
||||
|
||||
for (i = 0; i < adev->entries_nr; i++)
|
||||
if (adev->guest_msix_entries[i].vector == 0 ||
|
||||
adev->guest_msix_entries[i].entry == entry->entry) {
|
||||
adev->guest_msix_entries[i].entry = entry->entry;
|
||||
adev->guest_msix_entries[i].vector = entry->gsi;
|
||||
adev->host_msix_entries[i].entry = entry->entry;
|
||||
break;
|
||||
}
|
||||
if (i == adev->entries_nr) {
|
||||
r = -ENOSPC;
|
||||
goto msix_entry_out;
|
||||
}
|
||||
|
||||
msix_entry_out:
|
||||
mutex_unlock(&kvm->lock);
|
||||
|
||||
return r;
|
||||
}
|
||||
#endif
|
||||
|
||||
static long kvm_vcpu_ioctl(struct file *filp,
|
||||
unsigned int ioctl, unsigned long arg)
|
||||
{
|
||||
|
|
@ -2163,112 +1473,6 @@ static long kvm_vm_ioctl(struct file *filp,
|
|||
r = 0;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
#ifdef KVM_CAP_DEVICE_ASSIGNMENT
|
||||
case KVM_ASSIGN_PCI_DEVICE: {
|
||||
struct kvm_assigned_pci_dev assigned_dev;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_assign_device(kvm, &assigned_dev);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
case KVM_ASSIGN_IRQ: {
|
||||
r = -EOPNOTSUPP;
|
||||
break;
|
||||
}
|
||||
#ifdef KVM_CAP_ASSIGN_DEV_IRQ
|
||||
case KVM_ASSIGN_DEV_IRQ: {
|
||||
struct kvm_assigned_irq assigned_irq;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_assign_irq(kvm, &assigned_irq);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
case KVM_DEASSIGN_DEV_IRQ: {
|
||||
struct kvm_assigned_irq assigned_irq;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&assigned_irq, argp, sizeof assigned_irq))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_deassign_dev_irq(kvm, &assigned_irq);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
#ifdef KVM_CAP_DEVICE_DEASSIGNMENT
|
||||
case KVM_DEASSIGN_PCI_DEVICE: {
|
||||
struct kvm_assigned_pci_dev assigned_dev;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
#ifdef KVM_CAP_IRQ_ROUTING
|
||||
case KVM_SET_GSI_ROUTING: {
|
||||
struct kvm_irq_routing routing;
|
||||
struct kvm_irq_routing __user *urouting;
|
||||
struct kvm_irq_routing_entry *entries;
|
||||
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&routing, argp, sizeof(routing)))
|
||||
goto out;
|
||||
r = -EINVAL;
|
||||
if (routing.nr >= KVM_MAX_IRQ_ROUTES)
|
||||
goto out;
|
||||
if (routing.flags)
|
||||
goto out;
|
||||
r = -ENOMEM;
|
||||
entries = vmalloc(routing.nr * sizeof(*entries));
|
||||
if (!entries)
|
||||
goto out;
|
||||
r = -EFAULT;
|
||||
urouting = argp;
|
||||
if (copy_from_user(entries, urouting->entries,
|
||||
routing.nr * sizeof(*entries)))
|
||||
goto out_free_irq_routing;
|
||||
r = kvm_set_irq_routing(kvm, entries, routing.nr,
|
||||
routing.flags);
|
||||
out_free_irq_routing:
|
||||
vfree(entries);
|
||||
break;
|
||||
}
|
||||
#endif /* KVM_CAP_IRQ_ROUTING */
|
||||
#ifdef __KVM_HAVE_MSIX
|
||||
case KVM_ASSIGN_SET_MSIX_NR: {
|
||||
struct kvm_assigned_msix_nr entry_nr;
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&entry_nr, argp, sizeof entry_nr))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_set_msix_nr(kvm, &entry_nr);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
case KVM_ASSIGN_SET_MSIX_ENTRY: {
|
||||
struct kvm_assigned_msix_entry entry;
|
||||
r = -EFAULT;
|
||||
if (copy_from_user(&entry, argp, sizeof entry))
|
||||
goto out;
|
||||
r = kvm_vm_ioctl_set_msix_entry(kvm, &entry);
|
||||
if (r)
|
||||
goto out;
|
||||
break;
|
||||
}
|
||||
#endif
|
||||
case KVM_IRQFD: {
|
||||
struct kvm_irqfd data;
|
||||
|
|
@ -2301,6 +1505,8 @@ static long kvm_vm_ioctl(struct file *filp,
|
|||
#endif
|
||||
default:
|
||||
r = kvm_arch_vm_ioctl(filp, ioctl, arg);
|
||||
if (r == -ENOTTY)
|
||||
r = kvm_vm_ioctl_assigned_device(kvm, ioctl, arg);
|
||||
}
|
||||
out:
|
||||
return r;
|
||||
|
|
|
|||
Loading…
Reference in New Issue