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Commit 91713faf authored by Borislav Petkov's avatar Borislav Petkov Committed by Ingo Molnar
Browse files

kvm: Add accessors for guest CPU's family, model, stepping 



Those give the family, model and stepping of the guest vcpu.

Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Reviewed-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1448273546-2567-3-git-send-email-bp@alien8.de


Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
parent 99f925ce

arch/x86/kvm/cpuid.h

+34 −0
Original line number Diff line number Diff line
@@ -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