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authorPaolo Bonzini <pbonzini@redhat.com>2018-06-25 15:04:37 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2018-07-15 17:26:19 +0300
commitcd28325249a1ca0d771557ce823e0308ad629f98 (patch)
tree743e6e21becef4f24832881ceba97118283ab662 /arch
parent786b71f5b754273ccef6d9462e52062b3e1f9877 (diff)
downloadlinux-cd28325249a1ca0d771557ce823e0308ad629f98.tar.xz
KVM: VMX: support MSR_IA32_ARCH_CAPABILITIES as a feature MSR
This lets userspace read the MSR_IA32_ARCH_CAPABILITIES and check that all requested features are available on the host. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kvm/x86.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 71e7cda6d014..b91c1e1ff459 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1092,6 +1092,7 @@ static u32 msr_based_features[] = {
MSR_F10H_DECFG,
MSR_IA32_UCODE_REV,
+ MSR_IA32_ARCH_CAPABILITIES,
};
static unsigned int num_msr_based_features;
@@ -1100,7 +1101,8 @@ static int kvm_get_msr_feature(struct kvm_msr_entry *msr)
{
switch (msr->index) {
case MSR_IA32_UCODE_REV:
- rdmsrl(msr->index, msr->data);
+ case MSR_IA32_ARCH_CAPABILITIES:
+ rdmsrl_safe(msr->index, &msr->data);
break;
default:
if (kvm_x86_ops->get_msr_feature(msr))