]> git.baikalelectronics.ru Git - kernel.git/commit
ACPI: Disable the C2C3_FFH access mode HW has no MWAIT support
authorZhao Yakui <yakui.zhao@intel.com>
Tue, 17 Jun 2008 06:39:59 +0000 (14:39 +0800)
committerAndi Kleen <andi@basil.nowhere.org>
Wed, 16 Jul 2008 21:27:04 +0000 (23:27 +0200)
commit1aef97839a7a9a0a61efdb7e20bb0e92bca5d464
tree2bb559bf2edf363e2b6efa577ca8f2dfd817339d
parent98c6a1a71e172fd080277655c75fc64806950c55
ACPI: Disable the C2C3_FFH access mode HW has no MWAIT support

0aa0f43e1d660c91cc166836506332add0277913
(ACPI: Processor native C-states using MWAIT)
started passing C2C3_FFH to _PDC to tell the BIOS
that Linux supports MWAIT for deep C-states.

However, we should first double check with the hardware
that it actually supports MWAIT before potentially exposing
a BIOS bug of an MWAIT _CST on HW that doesn't support MWAIT.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Li Shaohua <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
arch/x86/kernel/acpi/processor.c