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KVM: VMX: support MSR_IA32_ARCH_CAPABILITIES as a feature MSR

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commit cd28325249a1ca0d771557ce823e0308ad629f98 upstream

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>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Paolo Bonzini 2018-06-25 14:04:37 +02:00 committed by Greg Kroah-Hartman
parent 7a1eac80b5
commit ce2c755166
1 changed files with 3 additions and 1 deletions
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4
arch/x86/kvm/x86.c
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@ -1015,6 +1015,7 @@ static unsigned num_emulated_msrs;
static u32 msr_based_features[] = {
MSR_F10H_DECFG,
MSR_IA32_UCODE_REV,
MSR_IA32_ARCH_CAPABILITIES,
};
static unsigned int num_msr_based_features;
@ -1023,7 +1024,8 @@ 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))