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x86: Fix keeping track of AMD C1E

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Accomodate the original C1E-aware idle routine to the different times
during boot when the BIOS enables C1E. While at it, remove the synthetic
CPUID flag in favor of a single global setting which denotes C1E status
on the system.

[ hpa: changed c1e_enabled to be a bool; clarified cpu bit 3:21 comment ]

Signed-off-by: Michal Schmidt <[email protected]>
LKML-Reference: <20100727165335.GA11630@aftab>
Signed-off-by: Borislav Petkov <[email protected]>
Signed-off-by: H. Peter Anvin <[email protected]>
Acked-by: Thomas Gleixner <[email protected]>
This commit is contained in:
Michal Schmidt 2010-07-27 18:53:35 +02:00 • committed by H. Peter Anvin
commit e8c534ec06
5 changed files with 9 additions and 6 deletions
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2
drivers/acpi/processor_idle.c
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@ -164,7 +164,7 @@ static void lapic_timer_check_state(int state, struct acpi_processor *pr,
if (cpu_has(&cpu_data(pr->id), X86_FEATURE_ARAT))
return;
if (boot_cpu_has(X86_FEATURE_AMDC1E))
if (c1e_detected)
type = ACPI_STATE_C1;
/*