mirror of https://gitee.com/openkylin/qemu.git
143 lines
3.3 KiB
C
143 lines
3.3 KiB
C
/*
|
|
* PEF (Protected Execution Facility) for POWER support
|
|
*
|
|
* Copyright Red Hat.
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2 or later.
|
|
* See the COPYING file in the top-level directory.
|
|
*
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
|
|
#include "qapi/error.h"
|
|
#include "qom/object_interfaces.h"
|
|
#include "sysemu/kvm.h"
|
|
#include "migration/blocker.h"
|
|
#include "exec/confidential-guest-support.h"
|
|
#include "hw/ppc/pef.h"
|
|
|
|
#define TYPE_PEF_GUEST "pef-guest"
|
|
OBJECT_DECLARE_SIMPLE_TYPE(PefGuest, PEF_GUEST)
|
|
|
|
typedef struct PefGuest PefGuest;
|
|
typedef struct PefGuestClass PefGuestClass;
|
|
|
|
struct PefGuestClass {
|
|
ConfidentialGuestSupportClass parent_class;
|
|
};
|
|
|
|
/**
|
|
* PefGuest:
|
|
*
|
|
* The PefGuest object is used for creating and managing a PEF
|
|
* guest.
|
|
*
|
|
* # $QEMU \
|
|
* -object pef-guest,id=pef0 \
|
|
* -machine ...,confidential-guest-support=pef0
|
|
*/
|
|
struct PefGuest {
|
|
ConfidentialGuestSupport parent_obj;
|
|
};
|
|
|
|
static int kvmppc_svm_init(ConfidentialGuestSupport *cgs, Error **errp)
|
|
{
|
|
#ifdef CONFIG_KVM
|
|
static Error *pef_mig_blocker;
|
|
|
|
if (!kvm_check_extension(kvm_state, KVM_CAP_PPC_SECURE_GUEST)) {
|
|
error_setg(errp,
|
|
"KVM implementation does not support Secure VMs (is an ultravisor running?)");
|
|
return -1;
|
|
} else {
|
|
int ret = kvm_vm_enable_cap(kvm_state, KVM_CAP_PPC_SECURE_GUEST, 0, 1);
|
|
|
|
if (ret < 0) {
|
|
error_setg(errp,
|
|
"Error enabling PEF with KVM");
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
/* add migration blocker */
|
|
error_setg(&pef_mig_blocker, "PEF: Migration is not implemented");
|
|
/* NB: This can fail if --only-migratable is used */
|
|
migrate_add_blocker(pef_mig_blocker, &error_fatal);
|
|
|
|
cgs->ready = true;
|
|
|
|
return 0;
|
|
#else
|
|
g_assert_not_reached();
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Don't set error if KVM_PPC_SVM_OFF ioctl is invoked on kernels
|
|
* that don't support this ioctl.
|
|
*/
|
|
static int kvmppc_svm_off(Error **errp)
|
|
{
|
|
#ifdef CONFIG_KVM
|
|
int rc;
|
|
|
|
rc = kvm_vm_ioctl(KVM_STATE(current_accel()), KVM_PPC_SVM_OFF);
|
|
if (rc && rc != -ENOTTY) {
|
|
error_setg_errno(errp, -rc, "KVM_PPC_SVM_OFF ioctl failed");
|
|
return rc;
|
|
}
|
|
return 0;
|
|
#else
|
|
g_assert_not_reached();
|
|
#endif
|
|
}
|
|
|
|
int pef_kvm_init(ConfidentialGuestSupport *cgs, Error **errp)
|
|
{
|
|
if (!object_dynamic_cast(OBJECT(cgs), TYPE_PEF_GUEST)) {
|
|
return 0;
|
|
}
|
|
|
|
if (!kvm_enabled()) {
|
|
error_setg(errp, "PEF requires KVM");
|
|
return -1;
|
|
}
|
|
|
|
return kvmppc_svm_init(cgs, errp);
|
|
}
|
|
|
|
int pef_kvm_reset(ConfidentialGuestSupport *cgs, Error **errp)
|
|
{
|
|
if (!object_dynamic_cast(OBJECT(cgs), TYPE_PEF_GUEST)) {
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* If we don't have KVM we should never have been able to
|
|
* initialize PEF, so we should never get this far
|
|
*/
|
|
assert(kvm_enabled());
|
|
|
|
return kvmppc_svm_off(errp);
|
|
}
|
|
|
|
OBJECT_DEFINE_TYPE_WITH_INTERFACES(PefGuest,
|
|
pef_guest,
|
|
PEF_GUEST,
|
|
CONFIDENTIAL_GUEST_SUPPORT,
|
|
{ TYPE_USER_CREATABLE },
|
|
{ NULL })
|
|
|
|
static void pef_guest_class_init(ObjectClass *oc, void *data)
|
|
{
|
|
}
|
|
|
|
static void pef_guest_init(Object *obj)
|
|
{
|
|
}
|
|
|
|
static void pef_guest_finalize(Object *obj)
|
|
{
|
|
}
|