KVM: expose latest Intel cpu new features (BMI1/BMI2/FMA/AVX2) to guest

Intel latest cpu add 6 new features, refer http://software.intel.com/file/36945
The new feature cpuid listed as below:

1. FMA		CPUID.EAX=01H:ECX.FMA[bit 12]
2. MOVBE	CPUID.EAX=01H:ECX.MOVBE[bit 22]
3. BMI1		CPUID.EAX=07H,ECX=0H:EBX.BMI1[bit 3]
4. AVX2		CPUID.EAX=07H,ECX=0H:EBX.AVX2[bit 5]
5. BMI2		CPUID.EAX=07H,ECX=0H:EBX.BMI2[bit 8]
6. LZCNT	CPUID.EAX=80000001H:ECX.LZCNT[bit 5]

This patch expose these features to guest.
Among them, FMA/MOVBE/LZCNT has already been defined, MOVBE/LZCNT has
already been exposed.

This patch defines BMI1/AVX2/BMI2, and exposes FMA/BMI1/AVX2/BMI2 to guest.

Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index f3444f700f3619eedcc8f3fa050586148e80ad70..17c5d4bdee5ed5124c7be91bf8d4ef73b39b7c2f 100644 (file)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -197,7 +197,10 @@
 
 /* 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_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 */
 
 #if defined(__KERNEL__) && !defined(__ASSEMBLY__)

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 0a332ec5203c2d25ba792f0773c67e81b1369c0f..47be763e1b60ca282369b90fbb717cf884032e70 100644 (file)
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -222,7 +222,7 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
                F(XMM3) | F(PCLMULQDQ) | 0 /* DTES64, MONITOR */ |
                0 /* DS-CPL, VMX, SMX, EST */ |
                0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ |
-               0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ |
+               F(FMA) | F(CX16) | 0 /* xTPR Update, PDCM */ |
                0 /* Reserved, DCA */ | F(XMM4_1) |
                F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) |
                0 /* Reserved*/ | F(AES) | F(XSAVE) | 0 /* OSXSAVE */ | F(AVX) |
@@ -242,7 +242,7 @@ 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(ERMS);
+               F(FSGSBASE) | F(BMI1) | F(AVX2) | F(SMEP) | F(BMI2) | F(ERMS);
 
        /* all calls to cpuid_count() should be made on the same cpu */
        get_cpu();