Commit d84f1cff authored Aug 20, 2018 by Drew Schmitt Committed by Paolo Bonzini Sep 20, 2018

KVM: x86: Turbo bits in MSR_PLATFORM_INFO



Allow userspace to set turbo bits in MSR_PLATFORM_INFO. Previously, only
the CPUID faulting bit was settable. But now any bit in
MSR_PLATFORM_INFO would be settable. This can be used, for example, to
convey frequency information about the platform on which the guest is
running.

Signed-off-by: Drew Schmitt <dasch@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

parent ba8e23db

arch/x86/kvm/x86.c

+0 −1

Original line number	Diff line number	Diff line
		@@ -2537,7 +2537,6 @@ int kvm_set_msr_common(struct kvm_vcpu vcpu, struct msr_data msr_info)
		break;
		case MSR_PLATFORM_INFO:
		if (!msr_info->host_initiated \|\|
		data & ~MSR_PLATFORM_INFO_CPUID_FAULT \|\|
		(!(data & MSR_PLATFORM_INFO_CPUID_FAULT) &&
		cpuid_fault_enabled(vcpu)))
		return 1;

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