linux-kernel - Re: [PATCH] KVM: x86: expose ADX feature to guest

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Message-ID: <5308BA3B.4050408@redhat.com>
Date:	Sat, 22 Feb 2014 15:54:51 +0100
From:	Paolo Bonzini <pbonzini@...hat.com>
To:	"Liu, Jinsong" <jinsong.liu@...el.com>
CC:	"gleb@...hat.com" <gleb@...hat.com>,
	"kvm@...r.kernel.org" <kvm@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"qemu-devel@...gnu.org" <qemu-devel@...gnu.org>
Subject: Re: [PATCH] KVM: x86: expose ADX feature to guest

Il 21/02/2014 18:36, Liu, Jinsong ha scritto:
> From 0750e335eb5860b0b483e217e8a08bd743cbba16 Mon Sep 17 00:00:00 2001
> From: Liu Jinsong <jinsong.liu@...el.com>
> Date: Thu, 20 Feb 2014 17:39:32 +0800
> Subject: [PATCH] KVM: x86: expose ADX feature to guest
>
> ADCX and ADOX instructions perform an unsigned addition with Carry flag and
> Overflow flag respectively.
>
> Signed-off-by: Xudong Hao <xudong.hao@...el.com>
> Signed-off-by: Liu Jinsong <jinsong.liu@...el.com>
> ---
>  arch/x86/kvm/cpuid.c |    3 ++-
>  1 files changed, 2 insertions(+), 1 deletions(-)
>
> diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
> index abe18b4..a951ae4 100644
> --- a/arch/x86/kvm/cpuid.c
> +++ b/arch/x86/kvm/cpuid.c
> @@ -303,7 +303,8 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
>  	/* cpuid 7.0.ebx */
>  	const u32 kvm_supported_word9_x86_features =
>  		F(FSGSBASE) | F(BMI1) | F(HLE) | F(AVX2) | F(SMEP) |
> -		F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | F(RDSEED);
> +		F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | F(RDSEED) |
> +		F(ADX);
>
>  	/* all calls to cpuid_count() should be made on the same cpu */
>  	get_cpu();
>

Applied to kvm/queue, thanks.

Paolo

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