[Xen-devel] [PATCH v1 1/2] X86: expose RDSEED, ADX, and PREFETCHW to pv/hvm

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

From 2fe617b6e7350ee1d635b0365914aa0d31f4fadd Mon Sep 17 00:00:00 2001
From: Liu Jinsong <jinsong.liu@xxxxxxxxx>
Date: Thu, 13 Feb 2014 21:05:01 +0800
Subject: [PATCH 1/2] X86: expose RDSEED, ADX, and PREFETCHW to pv/hvm

Intel recently release some new features, including RDSEED, ADX, and PREFETCHW.
This patch expose these new features to pv and hvm.

Signed-off-by: Xudong Hao <xudong.hao@xxxxxxxxx>
Signed-off-by: Liu Jinsong <jinsong.liu@xxxxxxxxx>
---
 tools/libxc/xc_cpufeature.h |    3 +++
 tools/libxc/xc_cpuid_x86.c  |    5 +++++
 2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/tools/libxc/xc_cpufeature.h b/tools/libxc/xc_cpufeature.h
index c464e3a..09b2c82 100644
--- a/tools/libxc/xc_cpufeature.h
+++ b/tools/libxc/xc_cpufeature.h
@@ -137,5 +137,8 @@
 #define X86_FEATURE_ERMS         9 /* Enhanced REP MOVSB/STOSB */
 #define X86_FEATURE_INVPCID     10 /* Invalidate Process Context ID */
 #define X86_FEATURE_RTM         11 /* Restricted Transactional Memory */
+#define X86_FEATURE_RDSEED      18 /* RDSEED instruction */
+#define X86_FEATURE_ADX         19 /* ADCX, ADOX instructions */
+
 
 #endif /* __LIBXC_CPUFEATURE_H */
diff --git a/tools/libxc/xc_cpuid_x86.c b/tools/libxc/xc_cpuid_x86.c
index bbbf9b8..9264039 100644
--- a/tools/libxc/xc_cpuid_x86.c
+++ b/tools/libxc/xc_cpuid_x86.c
@@ -197,6 +197,7 @@ static void intel_xc_cpuid_policy(
 
         /* Only a few features are advertised in Intel's 0x80000001. */
         regs[2] &= (is_64bit ? bitmaskof(X86_FEATURE_LAHF_LM) : 0) |
+                               bitmaskof(X86_FEATURE_3DNOWPREFETCH) |
                                bitmaskof(X86_FEATURE_ABM);
         regs[3] &= ((is_pae ? bitmaskof(X86_FEATURE_NX) : 0) |
                     (is_64bit ? bitmaskof(X86_FEATURE_LM) : 0) |
@@ -371,6 +372,8 @@ static void xc_cpuid_hvm_policy(
                         bitmaskof(X86_FEATURE_ERMS) |
                         bitmaskof(X86_FEATURE_INVPCID) |
                         bitmaskof(X86_FEATURE_RTM)  |
+                        bitmaskof(X86_FEATURE_RDSEED)  |
+                        bitmaskof(X86_FEATURE_ADX)  |
                         bitmaskof(X86_FEATURE_FSGSBASE));
         } else
             regs[1] = 0;
@@ -502,6 +505,8 @@ static void xc_cpuid_pv_policy(
                         bitmaskof(X86_FEATURE_BMI2) |
                         bitmaskof(X86_FEATURE_ERMS) |
                         bitmaskof(X86_FEATURE_RTM)  |
+                        bitmaskof(X86_FEATURE_RDSEED)  |
+                        bitmaskof(X86_FEATURE_ADX)  |
                         bitmaskof(X86_FEATURE_FSGSBASE));
         else
             regs[1] = 0;
-- 
1.7.1

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