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SubjectRe: [RFC PATCH 2/3] kvm: Add accessors for guest CPU's family, model, stepping
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On 14/11/2015 11:37, Borislav Petkov wrote:
> From: Borislav Petkov <bp@suse.de>
>
> Those give the family, model and stepping of the guest vcpu.
>
> Signed-off-by: Borislav Petkov <bp@suse.de>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> ---
> arch/x86/kvm/cpuid.h | 34 ++++++++++++++++++++++++++++++++++
> 1 file changed, 34 insertions(+)
>
> diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
> index 06332cb7e7d1..5d47e0d95ef1 100644
> --- a/arch/x86/kvm/cpuid.h
> +++ b/arch/x86/kvm/cpuid.h
> @@ -2,6 +2,7 @@
> #define ARCH_X86_KVM_CPUID_H
>
> #include "x86.h"
> +#include <asm/cpu.h>
>
> int kvm_update_cpuid(struct kvm_vcpu *vcpu);
> struct kvm_cpuid_entry2 *kvm_find_cpuid_entry(struct kvm_vcpu *vcpu,
> @@ -170,4 +171,37 @@ static inline bool guest_cpuid_has_nrips(struct kvm_vcpu *vcpu)
> }
> #undef BIT_NRIPS
>
> +static inline int guest_cpuid_family(struct kvm_vcpu *vcpu)
> +{
> + struct kvm_cpuid_entry2 *best;
> +
> + best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
> + if (!best)
> + return -1;
> +
> + return x86_family(best->eax);
> +}
> +
> +static inline int guest_cpuid_model(struct kvm_vcpu *vcpu)
> +{
> + struct kvm_cpuid_entry2 *best;
> +
> + best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
> + if (!best)
> + return -1;
> +
> + return x86_model(best->eax);
> +}
> +
> +static inline int guest_cpuid_stepping(struct kvm_vcpu *vcpu)
> +{
> + struct kvm_cpuid_entry2 *best;
> +
> + best = kvm_find_cpuid_entry(vcpu, 0x1, 0);
> + if (!best)
> + return -1;
> +
> + return x86_stepping(best->eax);
> +}
> +
> #endif
>

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>


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