linux-kernel - [PATCH] KVM: x86: expose new instruction RDSEED to guest

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Date:	Fri, 21 Feb 2014 17:33:32 +0000
From:	"Liu, Jinsong" <jinsong.liu@...el.com>
To:	Paolo Bonzini <pbonzini@...hat.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: [PATCH] KVM: x86: expose new instruction RDSEED to guest

>From 24ffdce9efebf13c6ed4882f714b2b57ef1141eb Mon Sep 17 00:00:00 2001
From: Liu Jinsong <jinsong.liu@...el.com>
Date: Thu, 20 Feb 2014 17:38:26 +0800
Subject: [PATCH] KVM: x86: expose new instruction RDSEED to guest

RDSEED instruction return a random number, which supplied by a
cryptographically secure, deterministic random bit generator(DRBG).

Signed-off-by: Xudong Hao <xudong.hao@...el.com>
Signed-off-by: Liu Jinsong <jinsong.liu@...el.com>
---
 arch/x86/kvm/cpuid.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index c697625..abe18b4 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -303,7 +303,7 @@ 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(BMI2) | F(ERMS) | f_invpcid | F(RTM) | F(RDSEED);
 
 	/* all calls to cpuid_count() should be made on the same cpu */
 	get_cpu();
-- 
1.7.1
--
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