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(parent: 8bbf4af) | patch
x86: prevent C-states hang on AMD C1E enabled machines
authorThomas Gleixner <tglx@linutronix.de>
Mon, 22 Sep 2008 17:02:25 +0000 (19:02 +0200)
committerThomas Gleixner <tglx@linutronix.de>
Tue, 23 Sep 2008 09:38:53 +0000 (11:38 +0200)
commitdce4796f38ed2f742db3bbf5815eef5e32bf05e8
tree9540f55fd2beb716a5dda0146e3e742c5a48e380tree | snapshot
parent8bbf4af6c3e3991ed578c500fe3b589fab0ad524commit | diff
x86: prevent C-states hang on AMD C1E enabled machines

Impact: System hang when AMD C1E machines switch into C2/C3

AMD C1E enabled systems do not work with normal ACPI C-states
even if the BIOS is advertising them. Limit the C-states to
C1 for the ACPI processor idle code.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
arch/x86/kernel/process.c diff | blob | history
include/asm-x86/acpi.h diff | blob | history
include/asm-x86/cpufeature.h diff | blob | history
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