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ACPI: Set max_cstate to 1 for early Opterons.

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AMD Opteron processors before CG revision don't like C-states > 1.

This solves the long standing bugzilla #5303 and probably some more
on affected machines:

  http://bugzilla.kernel.org/show_bug.cgi?id=5303

[ [email protected]: reworked the patch so it does not wreck ia64 ]

Signed-off-by: Thomas Gleixner <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Alexey Starikovskiy 2007-11-26 20:42:19 +01:00 • committed by Ingo Molnar
commit c1c3063446
3 changed files with 29 additions and 0 deletions
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1
include/asm-ia64/acpi.h
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@ -94,6 +94,7 @@ ia64_acpi_release_global_lock (unsigned int *lock)
#define acpi_noirq 0 /* ACPI always enabled on IA64 */
#define acpi_pci_disabled 0 /* ACPI PCI always enabled on IA64 */
#define acpi_strict 1 /* no ACPI spec workarounds on IA64 */
#define acpi_processor_cstate_check(x) (x) /* no idle limits on IA64 :) */
static inline void disable_acpi(void) { }
const char *acpi_get_sysname (void);