[Xen-devel] [PATCH 2/6] X86: expose Intel new features to dom0

["Liu, Jinsong" <jinsong.liu@xxxxxxxxx>]

X86: expose Intel new features to dom0

This patch expose Intel new features to dom0, including 
FMA/AVX2/BMI1/BMI2/LZCNT/MOVBE.

Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>

diff -r 38b25f3b2bca xen/arch/x86/traps.c
--- a/xen/arch/x86/traps.c      Thu Nov 17 17:54:17 2011 +0800
+++ b/xen/arch/x86/traps.c      Thu Nov 17 18:06:01 2011 +0800
@@ -826,8 +826,11 @@ static void pv_cpuid(struct cpu_user_reg
 
     case 0x00000007:
         if ( regs->ecx == 0 )
-            b &= (cpufeat_mask(X86_FEATURE_FSGSBASE) |
-                  cpufeat_mask(X86_FEATURE_ERMS));
+            b &= (cpufeat_mask(X86_FEATURE_BMI1) |
+                  cpufeat_mask(X86_FEATURE_AVX2) |
+                  cpufeat_mask(X86_FEATURE_BMI2) |
+                  cpufeat_mask(X86_FEATURE_ERMS) |
+                  cpufeat_mask(X86_FEATURE_FSGSBASE));
         else
             b = 0;
         a = c = d = 0;
diff -r 38b25f3b2bca xen/include/asm-x86/cpufeature.h
--- a/xen/include/asm-x86/cpufeature.h  Thu Nov 17 17:54:17 2011 +0800
+++ b/xen/include/asm-x86/cpufeature.h  Thu Nov 17 18:06:01 2011 +0800
@@ -93,6 +93,7 @@
 #define X86_FEATURE_TM2                (4*32+ 8) /* Thermal Monitor 2 */
 #define X86_FEATURE_SSSE3      (4*32+ 9) /* Supplemental Streaming SIMD 
Extensions-3 */
 #define X86_FEATURE_CID                (4*32+10) /* Context ID */
+#define X86_FEATURE_FMA                (4*32+12) /* Fused Multiply Add */
 #define X86_FEATURE_CX16        (4*32+13) /* CMPXCHG16B */
 #define X86_FEATURE_XTPR       (4*32+14) /* Send Task Priority Messages */
 #define X86_FEATURE_PDCM       (4*32+15) /* Perf/Debug Capability MSR */
@@ -100,6 +101,7 @@
 #define X86_FEATURE_SSE4_1     (4*32+19) /* Streaming SIMD Extensions 4.1 */
 #define X86_FEATURE_SSE4_2     (4*32+20) /* Streaming SIMD Extensions 4.2 */
 #define X86_FEATURE_X2APIC     (4*32+21) /* Extended xAPIC */
+#define X86_FEATURE_MOVBE      (4*32+22) /* movbe instruction */
 #define X86_FEATURE_POPCNT     (4*32+23) /* POPCNT instruction */
 #define X86_FEATURE_TSC_DEADLINE (4*32+24) /* "tdt" TSC Deadline Timer */
 #define X86_FEATURE_AES                (4*32+25) /* AES instructions */
@@ -145,7 +147,10 @@
 
 /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx), word 7 */
 #define X86_FEATURE_FSGSBASE   (7*32+ 0) /* {RD,WR}{FS,GS}BASE instructions */
+#define X86_FEATURE_BMI1       (7*32+ 3) /* 1st bit manipulation extensions */
+#define X86_FEATURE_AVX2       (7*32+ 5) /* AVX2 instructions */
 #define X86_FEATURE_SMEP       (7*32+ 7) /* Supervisor Mode Execution 
Protection */
+#define X86_FEATURE_BMI2       (7*32+ 8) /* 2nd bit manipulation extensions */
 #define X86_FEATURE_ERMS       (7*32+ 9) /* Enhanced REP MOVSB/STOSB */
 
 #define cpu_has(c, bit)                test_bit(bit, (c)->x86_capability)

Attachment: 2_new_cpuid_expose_dom0.patch
Description: 2_new_cpuid_expose_dom0.patch

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