From: Yang, Wei <wei.y.yang@intel.com>
Date: Tue, 14 Jun 2011 07:19:06 +0000 (+0800)
Subject: KVM: Enable ERMS feature support for KVM
X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=a01c8f9b4e266df1d7166d23216f2060648f862d;p=openwrt%2Fstaging%2Fblogic.git

KVM: Enable ERMS feature support for KVM

This patch exposes ERMS feature to KVM guests.

The REP MOVSB/STOSB instruction can enhance fast strings attempts to
move as much of the data with larger size load/stores as possible.

Signed-off-by: Yang, Wei <wei.y.yang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 76c16a5c6c56..0b803f04bde7 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2372,7 +2372,7 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
 
 	/* cpuid 7.0.ebx */
 	const u32 kvm_supported_word9_x86_features =
-		F(SMEP) | F(FSGSBASE);
+		F(SMEP) | F(FSGSBASE) | F(ERMS);
 
 	/* all calls to cpuid_count() should be made on the same cpu */
 	get_cpu();