Cache whether XSAVES is enabled in the guest by adding xsaves_enabled to
vcpu->arch.
Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>
Signed-off-by: Aaron Lewis <aaronlewis@xxxxxxxxxx>
Change-Id: If4638e0901c28a4494dad2e103e2c075e8ab5d68
---
arch/x86/include/asm/kvm_host.h | 1 +
arch/x86/kvm/svm.c | 3 +++
arch/x86/kvm/vmx/vmx.c | 5 +++++
3 files changed, 9 insertions(+)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 50eb430b0ad8..634c2598e389 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -562,6 +562,7 @@ struct kvm_vcpu_arch {
u64 smbase;
u64 smi_count;
bool tpr_access_reporting;
+ bool xsaves_enabled;
u64 ia32_xss;
u64 microcode_version;
u64 arch_capabilities;
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index f8ecb6df5106..f64041368594 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -5887,6 +5887,9 @@ static void svm_cpuid_update(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
+ vcpu->arch.xsaves_enabled = guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) &&
+ boot_cpu_has(X86_FEATURE_XSAVES);
+
/* Update nrips enabled cache */
svm->nrips_enabled = !!guest_cpuid_has(&svm->vcpu, X86_FEATURE_NRIPS);
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index e7970a2e8eae..34525af44353 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4040,6 +4040,8 @@ static void vmx_compute_secondary_exec_control(struct vcpu_vmx *vmx)
guest_cpuid_has(vcpu, X86_FEATURE_XSAVE) &&
guest_cpuid_has(vcpu, X86_FEATURE_XSAVES);
+ vcpu->arch.xsaves_enabled = xsaves_enabled;
+
if (!xsaves_enabled)
exec_control &= ~SECONDARY_EXEC_XSAVES;
@@ -7093,6 +7095,9 @@ static void vmx_cpuid_update(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
+ /* xsaves_enabled is recomputed in vmx_compute_secondary_exec_control(). */
+ vcpu->arch.xsaves_enabled = false;
+
if (cpu_has_secondary_exec_ctrls()) {
vmx_compute_secondary_exec_control(vmx);
vmcs_set_secondary_exec_control(vmx);
--
2.23.0.866.gb869b98d4c-goog
