[PATCH] Enable ERMS feature support for KVM

[PATCH] Enable ERMS feature support for KVM

[Yang, Wei]

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>

---
 arch/x86/kvm/x86.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index ff4623b..21fd313 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2361,7 +2361,7 @@ 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(SMEP) | F(ERMS);
 
 	/* all calls to cpuid_count() should be made on the same cpu */
 	get_cpu();
-- 
1.7.1

Re: [PATCH] Enable ERMS feature support for KVM

[Avi Kivity]

On 06/14/2011 10:19 AM, Yang, Wei wrote:
> 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.
>

Applied, thanks.

-- 
error compiling committee.c: too many arguments to function