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x86: hv_evmcs CPU flag support

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Adds a new CPU flag to enable the Enlightened VMCS KVM feature.
QEMU enables KVM_CAP_HYPERV_ENLIGHTENED_VMCS and gets back the
version to be advertised in lower 16 bits of CPUID.0x4000000A:EAX.

Suggested-by: Ladi Prosek <lprosek@redhat.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20181022165506.30332-3-vkuznets@redhat.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Vitaly Kuznetsov 2018-10-22 18:55:06 +02:00 • committed by Paolo Bonzini
parent 013aabdc66
commit e204ac612c
4 changed files with 32 additions and 2 deletions
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1
target/i386/cpu.h
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@ -1391,6 +1391,7 @@ struct X86CPU {
bool hyperv_frequencies;
bool hyperv_reenlightenment;
bool hyperv_tlbflush;
bool hyperv_evmcs;
bool hyperv_ipi;
bool check_cpuid;
bool enforce_cpuid;