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

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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>
This commit is contained in:
Joerg Roedel 2009-12-14 13:08:41 +01:00 committed by H. Peter Anvin
parent 048a8774ca
commit 414bb144ef
2 changed files with 8 additions and 0 deletions
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4
arch/x86/include/asm/cpufeature.h
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@ -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__)

4
arch/x86/kernel/cpu/addon_cpuid_features.c
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@ -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 }
};