[Xen-changelog] [xen-4.1-testing] x86/intel: Fix CPUID leaf 7 detection

[Xen patchbot-4.1-testing <patchbot@xxxxxxx>]

# HG changeset patch
# User Yang, Wei <wei.y.yang@xxxxxxxxx>
# Date 1306570975 -3600
# Node ID dbe9e02a1f75ea88e93e0f154feb01c570f0195d
# Parent  3f2f2543e9434268b7b5c89b1420383d73003b4a
x86/intel: Fix CPUID leaf 7 detection

Must set subleaf to 0 (input ECX==0).

Signed-off-by: Yang, Wei <wei.y.yang@xxxxxxxxx>
Signed-off-by: Li, Xin <xin.li@xxxxxxxxx>
xen-unstable changeset:   23436:f6ce871e5689
xen-unstable date:        Sat May 28 08:57:12 2011 +0100
---


diff -r 3f2f2543e943 -r dbe9e02a1f75 xen/arch/x86/cpu/common.c
--- a/xen/arch/x86/cpu/common.c Sat May 28 09:17:15 2011 +0100
+++ b/xen/arch/x86/cpu/common.c Sat May 28 09:22:55 2011 +0100
@@ -316,9 +316,11 @@
                }
 
                /* Intel-defined flags: level 0x00000007 */
-               if ( c->cpuid_level >= 0x00000007 )
-                       c->x86_capability[X86_FEATURE_FSGSBASE / 32]
-                               = cpuid_ebx(0x00000007);
+               if ( c->cpuid_level >= 0x00000007 ) {
+                       u32 dummy, ebx;
+                       cpuid_count(0x7, 0, &dummy, &ebx, &dummy, &dummy);
+                       c->x86_capability[X86_FEATURE_FSGSBASE / 32] = ebx;
+               }
        }
 
        early_intel_workaround(c);

_______________________________________________
Xen-changelog mailing list
Xen-changelog@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-changelog