[Xen-changelog] [xen-3.1-testing] svm: Properly mask unsupported bits in CPUID_80000001_ECX.

["Xen patchbot-3.1-testing" <patchbot-3.1-testing@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1200130705 0
# Node ID 927fb0b1201ca9cb5436404abdd85bd215bc7ca5
# Parent  c3dc2dedc23086f34e706155c4dae4162165f118
svm: Properly mask unsupported bits in CPUID_80000001_ECX.
Signed-off-by: Keir Fraser <keir.fraser@xxxxxxxxxx>
xen-unstable changeset:   16708:a30aabe3c84a
xen-unstable date:        Sat Jan 12 09:29:38 2008 +0000
---
 xen/arch/x86/hvm/svm/svm.c |    6 ++++++
 1 files changed, 6 insertions(+)

diff -r c3dc2dedc230 -r 927fb0b1201c xen/arch/x86/hvm/svm/svm.c
--- a/xen/arch/x86/hvm/svm/svm.c        Sat Jan 12 09:37:57 2008 +0000
+++ b/xen/arch/x86/hvm/svm/svm.c        Sat Jan 12 09:38:25 2008 +0000
@@ -1160,6 +1160,12 @@ static void svm_vmexit_do_cpuid(struct v
         clear_bit(X86_FEATURE_PSE36 & 31, &edx);
 
         /* Filter all other features according to a whitelist. */
+        ecx &= (bitmaskof(X86_FEATURE_LAHF_LM) |
+                bitmaskof(X86_FEATURE_ALTMOVCR) |
+                bitmaskof(X86_FEATURE_ABM) |
+                bitmaskof(X86_FEATURE_SSE4A) |
+                bitmaskof(X86_FEATURE_MISALIGNSSE) |
+                bitmaskof(X86_FEATURE_3DNOWPF));
         edx &= (0x0183f3ff | /* features shared with 0x00000001:EDX */
                 bitmaskof(X86_FEATURE_NX) |
                 bitmaskof(X86_FEATURE_LM) |

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