ACPI: Disable the C2C3_FFH access mode HW has no MWAIT support
commit5b53496a5ad79e91052f72761a7c5516b069bc99
authorZhao Yakui <yakui.zhao@intel.com>
Tue, 17 Jun 2008 06:39:59 +0000 (17 14:39 +0800)
committerAndi Kleen <andi@basil.nowhere.org>
Wed, 16 Jul 2008 21:27:04 +0000 (16 23:27 +0200)
tree2bb559bf2edf363e2b6efa577ca8f2dfd817339d
parent71b58cbb0c30d1f78636a48c4721529449d6ea37
ACPI: Disable the C2C3_FFH access mode HW has no MWAIT support

991528d7348667924176f3e29addea0675298944
(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