KVM: x86: skip host CPUID call for hypervisor leaves

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Hypervisor leaves are always synthesized by __do_cpuid_func; just return
zeroes and do not ask the host.  Even on nested virtualization, a value
from another hypervisor would be bogus, because all hypercalls and MSRs
are processed by KVM.

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Paolo Bonzini 2021-10-28 13:15:55 -04:00

parent 9d68c6f60e

commit 2746a6b72a

1 changed files with 9 additions and 1 deletions

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arch/x86/kvm/cpuid.c

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