[Qemu-devel] [PATCH] KVM: expose Intel cpu new features to guest

[Liu, Jinsong]

>From ecd8be962f69393c183f941bfdbd7a7d3876d442 Mon Sep 17 00:00:00 2001
From: Liu, Jinsong <address@hidden>
Date: Mon, 27 Feb 2012 05:19:32 +0800
Subject: [PATCH] KVM: expose Intel cpu new features to guest

Intel recently release 2 new features, HLE and TRM.
Refer to http://software.intel.com/file/41417.
This patch expose them to guest.

Signed-off-by: Liu, Jinsong <address@hidden>
---
 arch/x86/include/asm/cpufeature.h |    2 ++
 arch/x86/kvm/cpuid.c              |    3 ++-
 2 files changed, 4 insertions(+), 1 deletions(-)

diff --git a/arch/x86/include/asm/cpufeature.h 
b/arch/x86/include/asm/cpufeature.h
index 17c5d4b..e8d12a8 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -198,10 +198,12 @@
 /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 9 */
 #define X86_FEATURE_FSGSBASE   (9*32+ 0) /* {RD/WR}{FS/GS}BASE instructions*/
 #define X86_FEATURE_BMI1       (9*32+ 3) /* 1st group bit manipulation 
extensions */
+#define X86_FEATURE_HLE                (9*32+ 4) /* Hardware Lock Elision */
 #define X86_FEATURE_AVX2       (9*32+ 5) /* AVX2 instructions */
 #define X86_FEATURE_SMEP       (9*32+ 7) /* Supervisor Mode Execution 
Protection */
 #define X86_FEATURE_BMI2       (9*32+ 8) /* 2nd group bit manipulation 
extensions */
 #define X86_FEATURE_ERMS       (9*32+ 9) /* Enhanced REP MOVSB/STOSB */
+#define X86_FEATURE_RTM                (9*32+11) /* Restricted Transactional 
Memory */
 
 #if defined(__KERNEL__) && !defined(__ASSEMBLY__)
 
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 9fed5be..c2134b8 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -247,7 +247,8 @@ static 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(AVX2) | F(SMEP) | F(BMI2) | F(ERMS);
+               F(FSGSBASE) | F(BMI1) | F(HLE) | F(AVX2) | F(SMEP) |
+               F(BMI2) | F(ERMS) | F(RTM);
 
        /* all calls to cpuid_count() should be made on the same cpu */
        get_cpu();
-- 
1.7.1

0001-KVM-expose-Intel-cpu-new-features-to-guest.patch
Description: 0001-KVM-expose-Intel-cpu-new-features-to-guest.patch