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-rw-r--r--arch/x86/kvm/svm/pmu.c28
-rw-r--r--arch/x86/kvm/svm/sev.c64
-rw-r--r--arch/x86/kvm/svm/svm.c8
-rw-r--r--arch/x86/kvm/svm/svm.h4
4 files changed, 80 insertions, 24 deletions
diff --git a/arch/x86/kvm/svm/pmu.c b/arch/x86/kvm/svm/pmu.c
index b14860863c39..16a5ebb420cf 100644
--- a/arch/x86/kvm/svm/pmu.c
+++ b/arch/x86/kvm/svm/pmu.c
@@ -45,6 +45,22 @@ static struct kvm_event_hw_type_mapping amd_event_mapping[] = {
[7] = { 0xd1, 0x00, PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
};
+/* duplicated from amd_f17h_perfmon_event_map. */
+static struct kvm_event_hw_type_mapping amd_f17h_event_mapping[] = {
+ [0] = { 0x76, 0x00, PERF_COUNT_HW_CPU_CYCLES },
+ [1] = { 0xc0, 0x00, PERF_COUNT_HW_INSTRUCTIONS },
+ [2] = { 0x60, 0xff, PERF_COUNT_HW_CACHE_REFERENCES },
+ [3] = { 0x64, 0x09, PERF_COUNT_HW_CACHE_MISSES },
+ [4] = { 0xc2, 0x00, PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
+ [5] = { 0xc3, 0x00, PERF_COUNT_HW_BRANCH_MISSES },
+ [6] = { 0x87, 0x02, PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
+ [7] = { 0x87, 0x01, PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
+};
+
+/* amd_pmc_perf_hw_id depends on these being the same size */
+static_assert(ARRAY_SIZE(amd_event_mapping) ==
+ ARRAY_SIZE(amd_f17h_event_mapping));
+
static unsigned int get_msr_base(struct kvm_pmu *pmu, enum pmu_type type)
{
struct kvm_vcpu *vcpu = pmu_to_vcpu(pmu);
@@ -140,6 +156,7 @@ static inline struct kvm_pmc *get_gp_pmc_amd(struct kvm_pmu *pmu, u32 msr,
static unsigned int amd_pmc_perf_hw_id(struct kvm_pmc *pmc)
{
+ struct kvm_event_hw_type_mapping *event_mapping;
u8 event_select = pmc->eventsel & ARCH_PERFMON_EVENTSEL_EVENT;
u8 unit_mask = (pmc->eventsel & ARCH_PERFMON_EVENTSEL_UMASK) >> 8;
int i;
@@ -148,15 +165,20 @@ static unsigned int amd_pmc_perf_hw_id(struct kvm_pmc *pmc)
if (WARN_ON(pmc_is_fixed(pmc)))
return PERF_COUNT_HW_MAX;
+ if (guest_cpuid_family(pmc->vcpu) >= 0x17)
+ event_mapping = amd_f17h_event_mapping;
+ else
+ event_mapping = amd_event_mapping;
+
for (i = 0; i < ARRAY_SIZE(amd_event_mapping); i++)
- if (amd_event_mapping[i].eventsel == event_select
- && amd_event_mapping[i].unit_mask == unit_mask)
+ if (event_mapping[i].eventsel == event_select
+ && event_mapping[i].unit_mask == unit_mask)
break;
if (i == ARRAY_SIZE(amd_event_mapping))
return PERF_COUNT_HW_MAX;
- return amd_event_mapping[i].event_type;
+ return event_mapping[i].event_type;
}
/* check if a PMC is enabled by comparing it against global_ctrl bits. Because
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index 0ad70c12c7c3..636c77ef55fc 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -562,12 +562,20 @@ e_unpin:
static int sev_es_sync_vmsa(struct vcpu_svm *svm)
{
- struct vmcb_save_area *save = &svm->vmcb->save;
+ struct sev_es_save_area *save = svm->sev_es.vmsa;
/* Check some debug related fields before encrypting the VMSA */
- if (svm->vcpu.guest_debug || (save->dr7 & ~DR7_FIXED_1))
+ if (svm->vcpu.guest_debug || (svm->vmcb->save.dr7 & ~DR7_FIXED_1))
return -EINVAL;
+ /*
+ * SEV-ES will use a VMSA that is pointed to by the VMCB, not
+ * the traditional VMSA that is part of the VMCB. Copy the
+ * traditional VMSA as it has been built so far (in prep
+ * for LAUNCH_UPDATE_VMSA) to be the initial SEV-ES state.
+ */
+ memcpy(save, &svm->vmcb->save, sizeof(svm->vmcb->save));
+
/* Sync registgers */
save->rax = svm->vcpu.arch.regs[VCPU_REGS_RAX];
save->rbx = svm->vcpu.arch.regs[VCPU_REGS_RBX];
@@ -595,14 +603,6 @@ static int sev_es_sync_vmsa(struct vcpu_svm *svm)
save->xss = svm->vcpu.arch.ia32_xss;
save->dr6 = svm->vcpu.arch.dr6;
- /*
- * SEV-ES will use a VMSA that is pointed to by the VMCB, not
- * the traditional VMSA that is part of the VMCB. Copy the
- * traditional VMSA as it has been built so far (in prep
- * for LAUNCH_UPDATE_VMSA) to be the initial SEV-ES state.
- */
- memcpy(svm->sev_es.vmsa, save, sizeof(*save));
-
return 0;
}
@@ -1594,24 +1594,51 @@ static void sev_unlock_two_vms(struct kvm *dst_kvm, struct kvm *src_kvm)
atomic_set_release(&src_sev->migration_in_progress, 0);
}
+/* vCPU mutex subclasses. */
+enum sev_migration_role {
+ SEV_MIGRATION_SOURCE = 0,
+ SEV_MIGRATION_TARGET,
+ SEV_NR_MIGRATION_ROLES,
+};
-static int sev_lock_vcpus_for_migration(struct kvm *kvm)
+static int sev_lock_vcpus_for_migration(struct kvm *kvm,
+ enum sev_migration_role role)
{
struct kvm_vcpu *vcpu;
unsigned long i, j;
+ bool first = true;
kvm_for_each_vcpu(i, vcpu, kvm) {
- if (mutex_lock_killable(&vcpu->mutex))
+ if (mutex_lock_killable_nested(&vcpu->mutex, role))
goto out_unlock;
+
+ if (first) {
+ /*
+ * Reset the role to one that avoids colliding with
+ * the role used for the first vcpu mutex.
+ */
+ role = SEV_NR_MIGRATION_ROLES;
+ first = false;
+ } else {
+ mutex_release(&vcpu->mutex.dep_map, _THIS_IP_);
+ }
}
return 0;
out_unlock:
+
+ first = true;
kvm_for_each_vcpu(j, vcpu, kvm) {
if (i == j)
break;
+ if (first)
+ first = false;
+ else
+ mutex_acquire(&vcpu->mutex.dep_map, role, 0, _THIS_IP_);
+
+
mutex_unlock(&vcpu->mutex);
}
return -EINTR;
@@ -1621,8 +1648,15 @@ static void sev_unlock_vcpus_for_migration(struct kvm *kvm)
{
struct kvm_vcpu *vcpu;
unsigned long i;
+ bool first = true;
kvm_for_each_vcpu(i, vcpu, kvm) {
+ if (first)
+ first = false;
+ else
+ mutex_acquire(&vcpu->mutex.dep_map,
+ SEV_NR_MIGRATION_ROLES, 0, _THIS_IP_);
+
mutex_unlock(&vcpu->mutex);
}
}
@@ -1748,10 +1782,10 @@ int sev_vm_move_enc_context_from(struct kvm *kvm, unsigned int source_fd)
charged = true;
}
- ret = sev_lock_vcpus_for_migration(kvm);
+ ret = sev_lock_vcpus_for_migration(kvm, SEV_MIGRATION_SOURCE);
if (ret)
goto out_dst_cgroup;
- ret = sev_lock_vcpus_for_migration(source_kvm);
+ ret = sev_lock_vcpus_for_migration(source_kvm, SEV_MIGRATION_TARGET);
if (ret)
goto out_dst_vcpu;
@@ -2932,7 +2966,7 @@ void sev_es_vcpu_reset(struct vcpu_svm *svm)
sev_enc_bit));
}
-void sev_es_prepare_switch_to_guest(struct vmcb_save_area *hostsa)
+void sev_es_prepare_switch_to_guest(struct sev_es_save_area *hostsa)
{
/*
* As an SEV-ES guest, hardware will restore the host state on VMEXIT,
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 7e45d03cd018..17d334ef5430 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -1270,8 +1270,8 @@ static void svm_prepare_switch_to_guest(struct kvm_vcpu *vcpu)
*/
vmsave(__sme_page_pa(sd->save_area));
if (sev_es_guest(vcpu->kvm)) {
- struct vmcb_save_area *hostsa;
- hostsa = (struct vmcb_save_area *)(page_address(sd->save_area) + 0x400);
+ struct sev_es_save_area *hostsa;
+ hostsa = (struct sev_es_save_area *)(page_address(sd->save_area) + 0x400);
sev_es_prepare_switch_to_guest(hostsa);
}
@@ -3117,8 +3117,8 @@ static void dump_vmcb(struct kvm_vcpu *vcpu)
"tr:",
save01->tr.selector, save01->tr.attrib,
save01->tr.limit, save01->tr.base);
- pr_err("cpl: %d efer: %016llx\n",
- save->cpl, save->efer);
+ pr_err("vmpl: %d cpl: %d efer: %016llx\n",
+ save->vmpl, save->cpl, save->efer);
pr_err("%-15s %016llx %-13s %016llx\n",
"cr0:", save->cr0, "cr2:", save->cr2);
pr_err("%-15s %016llx %-13s %016llx\n",
diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h
index f76deff71002..2d83845b9032 100644
--- a/arch/x86/kvm/svm/svm.h
+++ b/arch/x86/kvm/svm/svm.h
@@ -181,7 +181,7 @@ struct svm_nested_state {
struct vcpu_sev_es_state {
/* SEV-ES support */
- struct vmcb_save_area *vmsa;
+ struct sev_es_save_area *vmsa;
struct ghcb *ghcb;
struct kvm_host_map ghcb_map;
bool received_first_sipi;
@@ -622,7 +622,7 @@ int sev_es_string_io(struct vcpu_svm *svm, int size, unsigned int port, int in);
void sev_es_init_vmcb(struct vcpu_svm *svm);
void sev_es_vcpu_reset(struct vcpu_svm *svm);
void sev_vcpu_deliver_sipi_vector(struct kvm_vcpu *vcpu, u8 vector);
-void sev_es_prepare_switch_to_guest(struct vmcb_save_area *hostsa);
+void sev_es_prepare_switch_to_guest(struct sev_es_save_area *hostsa);
void sev_es_unmap_ghcb(struct vcpu_svm *svm);
/* vmenter.S */
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