From: Liu, Jinsong <jinsong.liu@intel.com>
Date: Fri, 21 Feb 2014 17:33:32 +0000 (+0000)
Subject: KVM: x86: expose new instruction RDSEED to guest
X-Git-Tag: firefly_0821_release~176^2~4172^2~49
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=0c79893b2bad49e0c391a9499f50fcd5b0f80874;p=firefly-linux-kernel-4.4.55.git

KVM: x86: expose new instruction RDSEED to guest

From 24ffdce9efebf13c6ed4882f714b2b57ef1141eb Mon Sep 17 00:00:00 2001
From: Liu Jinsong <jinsong.liu@intel.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@intel.com>
Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index c6976257eff5..abe18b489e73 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();