linux-toradex.git/include/asm-x86/acpi.h, branch v2.6.27.50

x86: prevent C-states hang on AMD C1E enabled machines

2008-09-23T09:38:53+00:00

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

x86: use acpi_numa_init to parse on 32-bit numa

2008-07-08T08:38:47+00:00

seperate SRAT finding and parsing from get_memcfg_from_srat,
and let getmemcfg_from_srat only handle array from previous step.

Signed-off-by: Yinghai Lu 
Signed-off-by: Ingo Molnar

x86 mpparse: build fix

2008-06-03T07:40:57+00:00

fix this build bug:

 drivers/acpi/pci_irq.c: In function 'acpi_pci_irq_enable':
 drivers/acpi/pci_irq.c:574: error: implicit declaration of function 'mp_config_acpi_gsi'

Signed-off-by: Ingo Molnar

include/asm-x86/acpi.h: checkpatch cleanups - formatting only

2008-04-17T15:41:21+00:00

Signed-off-by: Joe Perches 
Signed-off-by: Ingo Molnar

x86: fix sparse warnings in acpi/bus.c

2008-02-09T22:24:08+00:00

Add function definition and extern variables to asm-x86/acpi.h.

All of these are used in bus.c in ifdef(CONFIG_X86) sections, so are
only added to the x86 include headers.  boot.c already includes acpi.h
so no changes are needed there.

Fixes the following:
arch/x86/kernel/acpi/boot.c:83:4: warning: symbol 'acpi_sci_flags' was not declared. Should it be static?
arch/x86/kernel/acpi/boot.c:84:5: warning: symbol 'acpi_sci_override_gsi' was not declared. Should it be static?
arch/x86/kernel/acpi/boot.c:421:13: warning: symbol 'acpi_pic_sci_set_trigger' was not declared. Should it be static?

Signed-off-by: Harvey Harrison 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: voluntary leave_mm before entering ACPI C3

2008-01-30T12:32:01+00:00

Aviod TLB flush IPIs during C3 states by voluntary leave_mm()
before entering C3.

The performance impact of TLB flush on C3 should not be significant with
respect to C3 wakeup latency. Also, CPUs tend to flush TLB in hardware while in
C3 anyways.

On a 8 logical CPU system, running make -j2, the number of tlbflush IPIs goes
down from 40 per second to ~ 0. Total number of interrupts during the run
of this workload was ~1200 per second, which makes it ~3% savings in wakeups.

There was no measurable performance or power impact however.

[ akpm@linux-foundation.org: symbol export fixes. ]

Signed-off-by: Venkatesh Pallipadi 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: remove __init modifier from header declaration

2008-01-30T12:31:57+00:00

This patch removes the __init modifier from an extern function
declaration in acpi.h.

Besides not being strictly needed, it requires the inclusion of
linux/init.h, which is usually not even included directly, increasing
header mess by a lot.

Signed-off-by: Glauber de Oliveira Costa 
Signed-off-by: Ingo Molnar 
Signed-off-by: Thomas Gleixner

x86: merge acpi_32/64.h

2008-01-30T12:30:36+00:00

Merge the files.

[ mingo@elte.hu: build fix ]

Signed-off-by: Thomas Gleixner 
Signed-off-by: Ingo Molnar

ACPI: Set max_cstate to 1 for early Opterons.

2007-11-26T19:42:19+00:00

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

[ tglx@linutronix.de: reworked the patch so it does not wreck ia64 ]

Signed-off-by: Thomas Gleixner 
Signed-off-by: Ingo Molnar

i386/x86_64: move headers to include/asm-x86

2007-10-11T09:20:03+00:00

Move the headers to include/asm-x86 and fixup the
header install make rules

Signed-off-by: Thomas Gleixner 
Signed-off-by: Ingo Molnar