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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>
This commit is contained in:
Drew Schmitt 2018-08-20 10:32:14 -07:00 committed by Paolo Bonzini
parent ba8e23db59
commit d84f1cff90
1 changed files with 0 additions and 1 deletions
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arch/x86/kvm/x86.c
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@ -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;