From mboxrd@z Thu Jan  1 00:00:00 1970
From: Radim =?utf-8?B?S3LEjW3DocWZ?= <rkrcmar@redhat.com>
Subject: Re: [PATCH v2 2/2] x86: svm: make wbinvd faster
Date: Mon, 2 Mar 2015 20:05:34 +0100
Message-ID: <20150302190534.GA2494@potion.brq.redhat.com>
References: <20150302180030.25137.83460.stgit@joelvmguard2.amd.com>
 <20150302180446.25137.93897.stgit@joelvmguard2.amd.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: QUOTED-PRINTABLE
Cc: Gleb Natapov <gleb@kernel.org>,
	Paolo Bonzini <pbonzini@redhat.com>, kvm@vger.kernel.org,
	David Kaplan <David.Kaplan@amd.com>,
	Joerg Roedel <joro@8bytes.org>, linux-kernel@vger.kernel.org,
	Borislav Petkov <bp@alien8.de>
To: Joel Schopp <joel.schopp@amd.com>
Return-path: <linux-kernel-owner@vger.kernel.org>
Content-Disposition: inline
In-Reply-To: <20150302180446.25137.93897.stgit@joelvmguard2.amd.com>
Sender: linux-kernel-owner@vger.kernel.org
List-Id: kvm.vger.kernel.org

2015-03-02 12:04-0600, Joel Schopp:
> From: David Kaplan <David.Kaplan@amd.com>
> No need to re-decode WBINVD since we know what it is from the interce=
pt.
>=20
> Signed-off-by: David Kaplan <David.Kaplan@amd.com>
> [extracted from larger unlrelated patch, forward ported, tested]
> Signed-off-by: Joel Schopp <joel.schopp@amd.com>
> ---

Reviewed-by: Radim Kr=C4=8Dm=C3=A1=C5=99 <rkrcmar@redhat.com>

> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
> @@ -2774,6 +2774,13 @@ static int skinit_interception(struct vcpu_svm=
 *svm)
>  	return 1;
>  }
> =20
> +static int wbinvd_interception(struct vcpu_svm *svm)
> +{
> +	kvm_emulate_wbinvd(&svm->vcpu);
> +	return 1;
> +}
> +
> +

(Squashing these lines would have been a nice improvement.)

>  static int xsetbv_interception(struct vcpu_svm *svm)
>  {
>  	u64 new_bv =3D kvm_read_edx_eax(&svm->vcpu);