lkml.org 
[lkml]   [2009]   [Feb]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 09/30] x86: Add EFER descriptions for FFXSR
Date
From: Alexander Graf <agraf@suse.de>

AMD k10 includes support for the FFXSR feature, which leaves out
XMM registers on FXSAVE/FXSAVE when the EFER_FFXSR bit is set in
EFER.

The CPUID feature bit exists already, but the EFER bit is missing
currently, so this patch adds it to the list of known EFER bits.

Signed-off-by: Alexander Graf <agraf@suse.de>
CC: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
---
arch/x86/include/asm/msr-index.h | 2 ++
1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h
index 46e9646..f4e505f 100644
--- a/arch/x86/include/asm/msr-index.h
+++ b/arch/x86/include/asm/msr-index.h
@@ -19,12 +19,14 @@
#define _EFER_LMA 10 /* Long mode active (read-only) */
#define _EFER_NX 11 /* No execute enable */
#define _EFER_SVME 12 /* Enable virtualization */
+#define _EFER_FFXSR 14 /* Enable Fast FXSAVE/FXRSTOR */

#define EFER_SCE (1<<_EFER_SCE)
#define EFER_LME (1<<_EFER_LME)
#define EFER_LMA (1<<_EFER_LMA)
#define EFER_NX (1<<_EFER_NX)
#define EFER_SVME (1<<_EFER_SVME)
+#define EFER_FFXSR (1<<_EFER_FFXSR)

/* Intel MSRs. Some also available on other CPUs */
#define MSR_IA32_PERFCTR0 0x000000c1
--
1.6.0.6


\
 
 \ /
  Last update: 2009-02-28 02:47    [from the cache]
©2003-2011 Jasper Spaans