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>

2 files changed, 8 insertions, 0 deletions

diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index 637e1ec963c3..0cd82d068613 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 468489b57aae..97ad79cdf688 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 }
         };