| commit | 09fd4b4ef5bc7e5222c13acec1bee8cd252fb63f | [log] [tgz] |
|---|---|---|
| author | Thomas Gleixner <tglx@linutronix.de> | Mon Jun 09 18:04:27 2008 +0200 |
| committer | Ingo Molnar <mingo@elte.hu> | Tue Jun 10 15:52:21 2008 +0200 |
| tree | f23eec885a8506c2f84987ac443db618fb58aa27 | |
| parent | 732d7be17b98ebfd59e5864c3490f19856fa832c [diff] |
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>