[Xen-devel] [PATCH v1 2/2] X86: expose RDSEED, ADX, and PREFETCHW to dom0

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

From 5a9178f28b7b16c2e21966722379d630a993c437 Mon Sep 17 00:00:00 2001
From: Liu Jinsong <jinsong.liu@xxxxxxxxx>
Date: Thu, 13 Feb 2014 20:37:15 +0800
Subject: [PATCH 2/2] X86: expose RDSEED, ADX, and PREFETCHW to dom0

This patch explicitly expose Intel new features to dom0, including RDSEED and 
ADX.
As for PREFETCHW, it doesn't need explicit exposing.

Signed-off-by: Xudong Hao <xudong.hao@xxxxxxxxx>
Signed-off-by: Liu Jinsong <jinsong.liu@xxxxxxxxx>
---
 xen/arch/x86/traps.c             |    2 ++
 xen/include/asm-x86/cpufeature.h |    2 ++
 2 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/xen/arch/x86/traps.c b/xen/arch/x86/traps.c
index 0bd43b9..c736dd1 100644
--- a/xen/arch/x86/traps.c
+++ b/xen/arch/x86/traps.c
@@ -829,6 +829,8 @@ void pv_cpuid(struct cpu_user_regs *regs)
                   cpufeat_mask(X86_FEATURE_BMI2) |
                   cpufeat_mask(X86_FEATURE_ERMS) |
                   cpufeat_mask(X86_FEATURE_RTM)  |
+                  cpufeat_mask(X86_FEATURE_RDSEED)  |
+                  cpufeat_mask(X86_FEATURE_ADX)  |
                   cpufeat_mask(X86_FEATURE_FSGSBASE));
         else
             b = 0;
diff --git a/xen/include/asm-x86/cpufeature.h b/xen/include/asm-x86/cpufeature.h
index 1cfaf94..87d5f66 100644
--- a/xen/include/asm-x86/cpufeature.h
+++ b/xen/include/asm-x86/cpufeature.h
@@ -148,6 +148,8 @@
 #define X86_FEATURE_INVPCID    (7*32+10) /* Invalidate Process Context ID */
 #define X86_FEATURE_RTM        (7*32+11) /* Restricted Transactional Memory */
 #define X86_FEATURE_NO_FPU_SEL         (7*32+13) /* FPU CS/DS stored as zero */
+#define X86_FEATURE_RDSEED     (7*32+18) /* RDSEED instruction */
+#define X86_FEATURE_ADX                (7*32+19) /* ADCX, ADOX instructions */
 #define X86_FEATURE_SMAP       (7*32+20) /* Supervisor Mode Access Prevention 
*/
 
 #define cpu_has(c, bit)                test_bit(bit, (c)->x86_capability)
-- 
1.7.1

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