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x86: extended "flags" to show virtualization HW feature in /proc/cpuinfo

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The hardware virtualization technology evolves very fast. But currently
it's hard to tell if your CPU support a certain kind of HW technology
without digging into the source code.

The patch add a new catagory in "flags" under /proc/cpuinfo. Now "flags"
can indicate the (important) HW virtulization features the CPU supported
as well.

Current implementation just cover Intel VMX side.

Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Sheng Yang
2008-09-10 18:53:34 +08:00
committed by Ingo Molnar
parent 315a6558f3
commit e38e05a858
2 changed files with 49 additions and 1 deletions
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9
include/asm-x86/cpufeature.h
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@@ -6,7 +6,7 @@
#include <asm/required-features.h>
#define NCAPINTS 8 /* N 32-bit words worth of info */
#define NCAPINTS 9 /* N 32-bit words worth of info */
/*
* Note: If the comment begins with a quoted string, that string is used
@@ -150,6 +150,13 @@
*/
#define X86_FEATURE_IDA (7*32+ 0) /* Intel Dynamic Acceleration */
/* Virtualization flags: Linux defined */
#define X86_FEATURE_TPR_SHADOW (8*32+ 0) /* Intel TPR Shadow */
#define X86_FEATURE_VNMI (8*32+ 1) /* Intel Virtual NMI */
#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 */
#if defined(__KERNEL__) && !defined(__ASSEMBLY__)
#include <linux/bitops.h>