linux.git/drivers/acpi/processor_throttling.c, branch v2.6.24 Linux kernel source tree ACPI: processor: Fix null pointer dereference in throttling 2008-01-15T05:47:47+00:00 Alexey Starikovskiy astarikovskiy@suse.de 2008-01-15T05:47:47+00:00 d1154be3004e9db2d61533e16bb2cf85dd27a8cb http://bugzilla.kernel.org/show_bug.cgi?id=9747 Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com> 
http://bugzilla.kernel.org/show_bug.cgi?id=9747

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: Delete the IRQ operation in throttling controll via PTC 2007-12-02T04:27:15+00:00 Zhao Yakui yakui.zhao@intel.com 2007-11-29T08:22:43+00:00 357dc4c3f13cb5c1e3b40a09cbe6ff1b0df2c7c3 The IRQ operation(enable/disable) should be avoided when throttling is controlled via PTC method. It is replaced by the migration of task. This fixes an oops on T61 -- a regression due to f79f06ab9f86 b/c FixedHW support tried to read remote MSR with interrupts disabled. Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> 
The IRQ operation(enable/disable) should be avoided when throttling is
controlled via PTC method. It is replaced by the migration of task.

This fixes an oops on T61 -- a regression due to
f79f06ab9f86 b/c FixedHW support tried to read remote MSR with interrupts disabled.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: Enable MSR (FixedHW) support for T-States 2007-11-17T02:46:25+00:00 Zhao Yakui yakui.zhao@intel.com 2007-11-15T09:06:36+00:00 f79f06ab9f86d7203006d2ec8992ac80df36a34e Add throttling control via MSR when T-states uses the FixHW Control Status registers. 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> 
Add throttling control via MSR when T-states uses
the FixHW Control Status registers.

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>
ACPI: Use _TSS for throttling control, when present. Add error checks. 2007-11-17T02:43:21+00:00 Zhao Yakui yakui.zhao@intel.com 2007-11-15T09:05:05+00:00 9bcb27217344c2c1389db3983a436e19484c2f50 _TSS was erroneously ignored, in favor of the FADT. When TSS is used, the access width is included in the PTC control/status register. So it is unnecessary that the access bit width is multiplied by 8. At the same time the bit_offset should be considered for system I/O Access. It should be checked the bit_width and bit_offset of PTC regsiter in order to avoid the failure of system I/O access. It means that bit_width plus bit_offset can't be greater than 32. 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> 
_TSS was erroneously ignored, in favor of the FADT.

When TSS is used, the access width is included in the PTC control/status
register.  So it is unnecessary that the access bit width is multiplied by 8.
At the same time the bit_offset should be considered for system I/O Access.

It should be checked the bit_width and bit_offset of PTC regsiter in order to
avoid the failure of system I/O access. It means that bit_width plus
bit_offset can't be greater than 32.

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>
ACPI: throttle: Change internal APIs better handle _PTC 2007-11-17T02:40:40+00:00 Zhao Yakui yakui.zhao@intel.com 2007-11-15T09:03:46+00:00 0753f6e0a3d9568fb6b8e34753b944d9f8eed05b Change the function interface for throttling control via PTC. The following functions are concerned: acpi_read_throttling_status() acpi_write_throttling_state() acpi_get_throttling_value() acpi_get_throttling_state() 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> 
Change the function interface for throttling control via PTC.
The following functions are concerned:

acpi_read_throttling_status()
acpi_write_throttling_state()
acpi_get_throttling_value()
acpi_get_throttling_state()

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>
ACPI: If _TSS exists, do not access FADT.duty_width 2007-11-17T02:39:21+00:00 Zhao Yakui yakui.zhao@intel.com 2007-11-15T09:02:03+00:00 22cc50199d0616f7b002563a0e9117ba479356e1 Factor out legacy FADT.duty_width code and run it only in the non _TSS case. 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> 
Factor out legacy FADT.duty_width code
and run it only in the non _TSS case.

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>
ACPI: Enforce T-state limit changes immediately 2007-11-17T02:34:49+00:00 Zhao Yakui yakui.zhao@intel.com 2007-11-15T08:59:30+00:00 ef54d5ad2f58f899be6419fd1090cdeb2439851a When a T-state limit change notification is received, Linux must evaluate _TPC and change its current T-state immediately to comply with the new limit. Previously, Linux would notice the new limit only upon the next throttling change. 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> 
When a T-state limit change notification is received,
Linux must evaluate _TPC and change its current
T-state immediately to comply with the new limit.

Previously, Linux would notice the new limit
only upon the next throttling change.

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>
ACPI: quiet ACPI Exceptions due to no _PTC or _TSS 2007-07-25T04:57:46+00:00 Len Brown len.brown@intel.com 2007-07-25T04:57:46+00:00 c30c620ee1cc351bcc149c4280e1166998df0064 ACPI Exception (processor_throttling-0084): AE_NOT_FOUND, Evaluating _PTC [20070126] ACPI Exception (processor_throttling-0147): AE_NOT_FOUND, Evaluating _TSS [20070126] These methods are optional, so Linux should not alarm users when they are not found. http://bugzilla.kernel.org/show_bug.cgi?id=8802 Signed-off-by: Len Brown <len.brown@intel.com> Acked-by: Luming Yu <luming.yu@intel.com> 
ACPI Exception (processor_throttling-0084): AE_NOT_FOUND, Evaluating _PTC [20070126]
ACPI Exception (processor_throttling-0147): AE_NOT_FOUND, Evaluating _TSS [20070126]

These methods are optional, so Linux should not
alarm users when they are not found.

http://bugzilla.kernel.org/show_bug.cgi?id=8802

Signed-off-by: Len Brown <len.brown@intel.com>
Acked-by: Luming Yu <luming.yu@intel.com>
ACPI: fix oops due to typo in new throttling code 2007-07-23T16:39:28+00:00 Luming Yu luming.yu@gmail.com 2007-07-23T16:39:28+00:00 3cc2649b879f0e83fd51b14c82bad5f8f208591e Signed-off-by: Luming Yu <luming.yu@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> 
Signed-off-by: Luming Yu <luming.yu@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
ACPI: static 2007-07-03T04:53:12+00:00 Adrian Bunk bunk@stusta.de 2007-07-03T04:53:12+00:00 6c5cf8aa5849819958311644ffaf8467e9fcf07e make 2 needlessly global functions static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Len Brown <len.brown@intel.com> 
make 2 needlessly global functions static.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>