Re: [PATCH 4/4] x86: properly handle kvm emulation of hyperv

[Paolo Bonzini]

Il 23/07/2013 11:41, Jason Wang ha scritto:
> Recent kvm has some basic support of hyperv, this will cause the guest to
> identify itself as running on top of hyperv instead of kvm which will disable
> kvm pv functionality. This is because we try to detect hyperv before kvm. Solve
> this by simply checking kvm in detect_hypervisor() first.
> 
> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
> Cc: Ingo Molnar <mingo@xxxxxxxxxx>
> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
> Cc: x86@xxxxxxxxxx
> Cc: Gleb Natapov <gleb@xxxxxxxxxx>
> Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
> Cc: K. Y. Srinivasan <kys@xxxxxxxxxxxxx>
> Signed-off-by: Jason Wang <jasowang@xxxxxxxxxx>
> ---
>  arch/x86/kernel/cpu/hypervisor.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/arch/x86/kernel/cpu/hypervisor.c b/arch/x86/kernel/cpu/hypervisor.c
> index 8727921..3e149b6 100644
> --- a/arch/x86/kernel/cpu/hypervisor.c
> +++ b/arch/x86/kernel/cpu/hypervisor.c
> @@ -36,10 +36,10 @@ static const __initconst struct hypervisor_x86 * const hypervisors[] =
>  	&x86_hyper_xen_hvm,
>  #endif
>  	&x86_hyper_vmware,
> -	&x86_hyper_ms_hyperv,
>  #ifdef CONFIG_KVM_GUEST
>  	&x86_hyper_kvm,
>  #endif
> +	&x86_hyper_ms_hyperv,
>  };
>  
>  const struct hypervisor_x86 *x86_hyper;
> 

Acked-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
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