x86, cpu: Fix renamed, not-yet-shipping AMD CPUID feature bit

The AMD SSE5 feature set as-it has been replaced by some extensions
to the AVX instruction set. Thus the bit formerly advertised as SSE5
is re-used for one of these extensions (XOP).
Although this changes the /proc/cpuinfo output, it is not user visible, as
there are no CPUs (yet) having this feature.
To avoid confusion this should be added to the stable series, too.

Cc: stable@kernel.org [.32.x .34.x, .35.x]
Signed-off-by: Andre Przywara <andre.przywara@amd.com>
LKML-Reference: <1283778860-26843-2-git-send-email-andre.przywara@amd.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 781a50b..c9c73d8 100644 (file)
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -152,7 +152,7 @@
 #define X86_FEATURE_3DNOWPREFETCH (6*32+ 8) /* 3DNow prefetch instructions */
 #define X86_FEATURE_OSVW       (6*32+ 9) /* OS Visible Workaround */
 #define X86_FEATURE_IBS                (6*32+10) /* Instruction Based Sampling */
-#define X86_FEATURE_SSE5       (6*32+11) /* SSE-5 */
+#define X86_FEATURE_XOP                (6*32+11) /* extended AVX instructions */
 #define X86_FEATURE_SKINIT     (6*32+12) /* SKINIT/STGI instructions */
 #define X86_FEATURE_WDT                (6*32+13) /* Watchdog timer */
 #define X86_FEATURE_NODEID_MSR (6*32+19) /* NodeId MSR */

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 3a09c62..dd54779 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -1996,7 +1996,7 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
        const u32 kvm_supported_word6_x86_features =
                F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ |
                F(CR8_LEGACY) | F(ABM) | F(SSE4A) | F(MISALIGNSSE) |
-               F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(SSE5) |
+               F(3DNOWPREFETCH) | 0 /* OSVW */ | 0 /* IBS */ | F(XOP) |
                0 /* SKINIT */ | 0 /* WDT */;
 
        /* all calls to cpuid_count() should be made on the same cpu */