Re: [PATCH v2 34/49] KVM: x86: Advertise HYPERVISOR in KVM_GET_SUPPORTED_CPUID
From: Maxim Levitsky
Date: Thu Jul 04 2024 - 22:04:54 EST
On Fri, 2024-05-17 at 10:39 -0700, Sean Christopherson wrote:
> Unconditionally advertise "support" for the HYPERVISOR feature in CPUID,
> as the flag simply communicates to the guest that's it's running under a
> hypervisor.
>
> Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx>
> ---
> arch/x86/kvm/cpuid.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
> index d1f427284ccc..de898d571faa 100644
> --- a/arch/x86/kvm/cpuid.c
> +++ b/arch/x86/kvm/cpuid.c
> @@ -681,7 +681,8 @@ void kvm_set_cpu_caps(void)
> F(PCID) | 0 /* Reserved, DCA */ | F(XMM4_1) |
> F(XMM4_2) | EMUL_F(X2APIC) | F(MOVBE) | F(POPCNT) |
> EMUL_F(TSC_DEADLINE_TIMER) | F(AES) | F(XSAVE) |
> - 0 /* OSXSAVE */ | F(AVX) | F(F16C) | F(RDRAND)
> + 0 /* OSXSAVE */ | F(AVX) | F(F16C) | F(RDRAND) |
> + EMUL_F(HYPERVISOR)
> );
>
> kvm_cpu_cap_init(CPUID_1_EDX,
This makes sense.
Reviewed-by: Maxim Levitsky <mlevitsk@xxxxxxxxxx>
Best regards,
Maxim Levitsky