[tip:x86/cpu] x86, cpu: Print AMD virtualization features in /proc/cpuinfo

tip-bot for Joerg Roedel
2010-02-14T00:19:24Z

Commit-ID: 414bb144efa2d2fe16d104d836d0d6b6e9265788
Gitweb: http://git.kernel.org/tip/414bb144efa2d2fe16d104d836d0d6b6e9265788
Author: Joerg Roedel <joerg.roedel@amd.com>
AuthorDate: Mon, 14 Dec 2009 13:08:41 +0100
Committer: H. Peter Anvin <hpa@zytor.com>
CommitDate: Sat, 13 Feb 2010 15:04:40 -0800

x86, cpu: Print AMD virtualization features in /proc/cpuinfo

This patch adds code to cpu initialization path to detect
the extended virtualization features of AMD cpus to show
them in /proc/cpuinfo.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
LKML-Reference: <1260792521-15212-1-git-send-email-joerg.roedel@amd.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---
arch/x86/include/asm/cpufeature.h | 4 ++++
arch/x86/kernel/cpu/addon_cpuid_features.c | 4 ++++
2 files changed, 8 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 637e1ec..0cd82d0 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -168,6 +168,10 @@
#define X86_FEATURE_FLEXPRIORITY (8*32+ 2) /* Intel FlexPriority */
#define X86_FEATURE_EPT (8*32+ 3) /* Intel Extended Page Table */
#define X86_FEATURE_VPID (8*32+ 4) /* Intel Virtual Processor ID */
+#define X86_FEATURE_NPT (8*32+5) /* AMD Nested Page Table support */
+#define X86_FEATURE_LBRV (8*32+6) /* AMD LBR Virtualization support */
+#define X86_FEATURE_SVML (8*32+7) /* "svm_lock" AMD SVM locking MSR */
+#define X86_FEATURE_NRIPS (8*32+8) /* "nrip_save" AMD SVM next_rip save */

#if defined(__KERNEL__) && !defined(__ASSEMBLY__)

diff --git a/arch/x86/kernel/cpu/addon_cpuid_features.c b/arch/x86/kernel/cpu/addon_cpuid_features.c
index 468489b..97ad79c 100644
--- a/arch/x86/kernel/cpu/addon_cpuid_features.c
+++ b/arch/x86/kernel/cpu/addon_cpuid_features.c
@@ -32,6 +32,10 @@ void __cpuinit init_scattered_cpuid_features(struct cpuinfo_x86 *c)
static const struct cpuid_bit __cpuinitconst cpuid_bits[] = {
{ X86_FEATURE_IDA, CR_EAX, 1, 0x00000006 },
{ X86_FEATURE_ARAT, CR_EAX, 2, 0x00000006 },
+ { X86_FEATURE_NPT, CR_EDX, 0, 0x8000000a },
+ { X86_FEATURE_LBRV, CR_EDX, 1, 0x8000000a },
+ { X86_FEATURE_SVML, CR_EDX, 2, 0x8000000a },
+ { X86_FEATURE_NRIPS, CR_EDX, 3, 0x8000000a },
{ 0, 0, 0, 0 }
};