From: "Yang, Wei" <wei.y.yang@intel.com>
To: avi@redhat.com
Cc: kvm@vger.kernel.org, "Yang, Wei" <wei.y.yang@intel.com>
Subject: [PATCH] Enable ERMS feature support for KVM
Date: Tue, 14 Jun 2011 15:19:06 +0800 [thread overview]
Message-ID: <1308035946-5029-1-git-send-email-wei.y.yang@intel.com> (raw)
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
next reply other threads:[~2011-06-14 7:20 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-06-14 7:19 Yang, Wei [this message]
2011-06-14 12:43 ` [PATCH] Enable ERMS feature support for KVM Avi Kivity
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