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| author |   Thomas Gleixner <tglx@linutronix.de> | 2008-06-09 18:04:27 +0200 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2008-06-10 15:52:21 +0200 |
| commit | 09fd4b4ef5bc7e5222c13acec1bee8cd252fb63f (patch) | |
| tree | f23eec885a8506c2f84987ac443db618fb58aa27 /arch/x86/kernel/process_64.c | |
| parent | x86: use cpuinfo to check for interrupt pending message msr (diff) | |
| download | linux-dev-09fd4b4ef5bc7e5222c13acec1bee8cd252fb63f.tar.xz linux-dev-09fd4b4ef5bc7e5222c13acec1bee8cd252fb63f.zip | |
x86: use cpuid to check MWAIT support for C1
cpuid(0x05) provides extended information about MWAIT in EDX when bit
0 of ECX is set. Bit 4-7 of EDX determine whether MWAIT is supported
for C1. C1E enabled CPUs have these bits set to 0.
Based on an earlier patch from Andi Kleen.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/process_64.c')
0 files changed, 0 insertions, 0 deletions