[Xen-devel] [PATCH 1/6] X86: expose Intel new features to pv/hvm

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

X86: expose Intel new features to pv/hvm

Intel recently release some new features, including 
FMA/AVX2/BMI1/BMI2/LZCNT/MOVBE.
Refer to http://software.intel.com/file/36945
This patch expose these new features to pv and hvm.

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

# HG changeset patch
# Parent 4815be3af73cd22d8225754ef5fff0ca03759ad7

diff -r 4815be3af73c tools/libxc/xc_cpufeature.h
--- a/tools/libxc/xc_cpufeature.h       Thu Sep 15 15:26:07 2011 +0100
+++ b/tools/libxc/xc_cpufeature.h       Thu Nov 17 17:54:17 2011 +0800
@@ -74,6 +74,7 @@
 #define X86_FEATURE_TM2          8 /* Thermal Monitor 2 */
 #define X86_FEATURE_SSSE3        9 /* Supplemental Streaming SIMD Exts-3 */
 #define X86_FEATURE_CID         10 /* Context ID */
+#define X86_FEATURE_FMA         12 /* Fused Multiply Add */
 #define X86_FEATURE_CX16        13 /* CMPXCHG16B */
 #define X86_FEATURE_XTPR        14 /* Send Task Priority Messages */
 #define X86_FEATURE_PDCM        15 /* Perf/Debug Capability MSR */
@@ -81,6 +82,7 @@
 #define X86_FEATURE_SSE4_1      19 /* Streaming SIMD Extensions 4.1 */
 #define X86_FEATURE_SSE4_2      20 /* Streaming SIMD Extensions 4.2 */
 #define X86_FEATURE_X2APIC      21 /* x2APIC */
+#define X86_FEATURE_MOVBE       22 /* movbe instruction */
 #define X86_FEATURE_POPCNT      23 /* POPCNT instruction */
 #define X86_FEATURE_TSC_DEADLINE 24 /* "tdt" TSC Deadline Timer */
 #define X86_FEATURE_AES         25 /* AES acceleration instructions */
@@ -125,7 +127,10 @@
 
 /* Intel-defined CPU features, CPUID level 0x00000007:0 (ebx) */
 #define X86_FEATURE_FSGSBASE     0 /* {RD,WR}{FS,GS}BASE instructions */
+#define X86_FEATURE_BMI1         3 /* 1st group bit manipulation extensions */
+#define X86_FEATURE_AVX2         5 /* AVX2 instructions */
 #define X86_FEATURE_SMEP         7 /* Supervisor Mode Execution Protection */
+#define X86_FEATURE_BMI2         8 /* 2nd group bit manipulation extensions */
 #define X86_FEATURE_ERMS         9 /* Enhanced REP MOVSB/STOSB */
 
 #endif /* __LIBXC_CPUFEATURE_H */
diff -r 4815be3af73c tools/libxc/xc_cpuid_x86.c
--- a/tools/libxc/xc_cpuid_x86.c        Thu Sep 15 15:26:07 2011 +0100
+++ b/tools/libxc/xc_cpuid_x86.c        Thu Nov 17 17:54:17 2011 +0800
@@ -196,7 +196,8 @@ static void intel_xc_cpuid_policy(
         int is_64bit = hypervisor_is_64bit(xch) && is_pae;
 
         /* Only a few features are advertised in Intel's 0x80000001. */
-        regs[2] &= (is_64bit ? bitmaskof(X86_FEATURE_LAHF_LM) : 0);
+        regs[2] &= (is_64bit ? bitmaskof(X86_FEATURE_LAHF_LM) : 0) |
+                               bitmaskof(X86_FEATURE_ABM);
         regs[3] &= ((is_pae ? bitmaskof(X86_FEATURE_NX) : 0) |
                     (is_64bit ? bitmaskof(X86_FEATURE_LM) : 0) |
                     (is_64bit ? bitmaskof(X86_FEATURE_SYSCALL) : 0) |
@@ -308,9 +309,11 @@ static void xc_cpuid_hvm_policy(
         regs[2] &= (bitmaskof(X86_FEATURE_XMM3) |
                     bitmaskof(X86_FEATURE_PCLMULQDQ) |
                     bitmaskof(X86_FEATURE_SSSE3) |
+                    bitmaskof(X86_FEATURE_FMA) |
                     bitmaskof(X86_FEATURE_CX16) |
                     bitmaskof(X86_FEATURE_SSE4_1) |
                     bitmaskof(X86_FEATURE_SSE4_2) |
+                    bitmaskof(X86_FEATURE_MOVBE)  |
                     bitmaskof(X86_FEATURE_POPCNT) |
                     bitmaskof(X86_FEATURE_AES) |
                     bitmaskof(X86_FEATURE_F16C) |
@@ -355,7 +358,10 @@ static void xc_cpuid_hvm_policy(
 
     case 0x00000007: /* Intel-defined CPU features */
         if ( input[1] == 0 ) {
-            regs[1] &= (bitmaskof(X86_FEATURE_SMEP) |
+            regs[1] &= (bitmaskof(X86_FEATURE_BMI1) |
+                        bitmaskof(X86_FEATURE_AVX2) |
+                        bitmaskof(X86_FEATURE_SMEP) |
+                        bitmaskof(X86_FEATURE_BMI2) |
                         bitmaskof(X86_FEATURE_ERMS) |
                         bitmaskof(X86_FEATURE_FSGSBASE));
         } else
@@ -481,8 +487,11 @@ static void xc_cpuid_pv_policy(
 
     case 0x00000007:
         if ( input[1] == 0 )
-            regs[1] &= (bitmaskof(X86_FEATURE_FSGSBASE) |
-                        bitmaskof(X86_FEATURE_ERMS));
+            regs[1] &= (bitmaskof(X86_FEATURE_BMI1) |
+                        bitmaskof(X86_FEATURE_AVX2) |
+                        bitmaskof(X86_FEATURE_BMI2) |
+                        bitmaskof(X86_FEATURE_ERMS) |
+                        bitmaskof(X86_FEATURE_FSGSBASE));
         else
             regs[1] = 0;
         regs[0] = regs[2] = regs[3] = 0;

Attachment: 1_new_cpuid_expose_pv_hvm.patch
Description: 1_new_cpuid_expose_pv_hvm.patch

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