Commit ce2c7551 authored Jun 25, 2018 by Paolo Bonzini Committed by Greg Kroah-Hartman Aug 15, 2018

KVM: VMX: support MSR_IA32_ARCH_CAPABILITIES as a feature MSR



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>

parent 7a1eac80

arch/x86/kvm/x86.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -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))