[Xen-devel] [Patch] Fix CPUID leaf 7 syntax in XEN

["Yang, Wei Y" <wei.y.yang@xxxxxxxxx>]

This patch fixes CPUID leaf 7 syntax in Xen, which needs to set sub leaf to 0 
(input ECX=0).

Signed-off-by: Yang, Wei <wei.y.yang@xxxxxxxxx>
Signed-off-by: Li, Xin <xin.li@xxxxxxxxx>

common.c |    7 +++++--
1 file changed, 5 insertions(+), 2 deletions(-)

diff -r 88fe9f780b3d -r 3ffa6082b9a0 xen/arch/x86/cpu/common.c
--- a/xen/arch/x86/cpu/common.c Thu May 26 17:16:47 2011 +0100
+++ b/xen/arch/x86/cpu/common.c Sat May 28 06:02:37 2011 +0800
@@ -263,8 +263,11 @@
 
        /* Intel-defined flags: level 0x00000007 */
        if ( c->cpuid_level >= 0x00000007 )
-               c->x86_capability[X86_FEATURE_FSGSBASE / 32]
-                       = cpuid_ebx(0x00000007);
+        {
+                u32 dummy;
+                cpuid_count(0x00000007, 0, &dummy, &ebx, &dummy, &dummy);
+                c->x86_capability[X86_FEATURE_FSGSBASE / 32] = ebx;
+        }
 
        early_intel_workaround(c);


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