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path: root/drivers/acpi/acpica/hwsleep.c
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2012-07-31ACPI: delete _GTS/_BFS supportLen Brown1-17/+3
_GTS and _BFS were added to the suspend/resume flow in the ACPI 2.0 specification. Linux dutifully implemented _GTS and _BFS. We discovered that it was rarely seen in systems in the field. Further, some of those systems had AML so bogus that it could never work -- proof that no other operating system supports _GTS and _BFS. So we made _GTS and _BFS optional via modparam, and disabled them by default. But we've had to complicate some code to keep this support in the kernel, as these methods are defined to be evaluated very close to sleep entry and exit. Indeed, no other AML is ever evaluated with interrupts off. We have submitted a proposal for _GTS and _BFS to be officially removed from the ACPI specification on the next revision. Here we remove it from Linux. Signed-off-by: Len Brown <len.brown@intel.com> Acked-by: Ingo Molnar <mingo@kernel.org> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-07-26Merge branches 'acpi_pad', 'acpica', 'apei-bugzilla-43282', 'battery', ↵Len Brown1-25/+3
'cpuidle-coupled', 'cpuidle-tweaks', 'intel_idle-ivb', 'ost', 'red-hat-bz-772730', 'thermal', 'thermal-spear' and 'turbostat-v2' into release
2012-07-17ACPICA: AcpiSrc: Fix some translation issues for Linux conversionBob Moore1-3/+3
Fixes issues like this: i_aSL -> iASL 00-7_f -> 00-7F local_fADT -> local_FADT execute_oSI -> execute_OSI Also, in function headers, the parameters are now translated to lower case (with underscores if necessary.) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2012-07-10ACPI / PM: Leave Bus Master Arbitration enabled for suspend/resumeJonathan Nieder1-22/+0
This is an old suspend/resume lockup fix: commit 2780cc4660e1 Author: Len Brown <len.brown@intel.com> Date: Thu Dec 23 13:43:30 2004 -0500 [ACPI] Fix suspend/resume lockup issue by leaving Bus Master Arbitration enabled. The ACPI spec mandates it be disabled only for C3. http://bugzilla.kernel.org/show_bug.cgi?id=3599 Signed-off-by: David Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> The bug snuck back in in commit 2feec47d4c5f (ACPICA: ACPI 5: Support for new FADT SleepStatus, SleepControl registers, 2012-02-14), presumably by copy/pasting a copy of the code without that fix for the legacy case. On affected machines, after that commit, the machine locks up hard on resume from suspend. The same fix as seven years ago still works. Addresses <https://bugzilla.kernel.org/show_bug.cgi?id=43641>. Reported-bisected-and-tested-by: Octavio Alvarez <alvarezp@alvarezp.com> Reported-by: Adrian Knoth <adi@drcomp.erfurt.thur.de> Signed-off-by: Jonathan Nieder <jrnieder@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2012-03-31Merge branch 'tboot' into releaseLen Brown1-3/+7
Conflicts: drivers/acpi/acpica/hwsleep.c Text conflict between: 2feec47d4c5f80b05f1650f5a24865718978eea4 (ACPICA: ACPI 5: Support for new FADT SleepStatus, SleepControl registers) which removed #include "actables.h" and 09f98a825a821f7a3f1b162f9ed023f37213a63b (x86, acpi, tboot: Have a ACPI os prepare sleep instead of calling tboot_sleep.) which removed #include <linux/tboot.h> The resolution is to remove them both. Signed-off-by: Len Brown <len.brown@intel.com>
2012-03-27ACPICA: Sleep/Wake interfaces: optionally execute _GTS and _BFSLin Ming1-6/+15
Enhanced the sleep/wake interfaces to optionally execute the _GTS method (Going To Sleep), and the _BFS method (Back From Sleep). Windows apparently does not execute these methods, and therefore these methods are often untested. It has been seen on some systems where the execution of these methods causes errors and also prevents the machine from entering S5. It is therefore suggested that host operating systems do not execute these methods by default. In the future, perhaps these methods can be optionally executed based on the age of the system and/or what is the newest version of Windows that the BIOS asks for via _OSI. Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2012-03-22ACPICA: Clarify METHOD_NAME* defines for full-pathname casesBob Moore1-5/+5
Changed the METHOD_NAME* defines that define a full pathname to the method to METHOD_PATHNAME* in order to make it clear that it is not a simple 4-character ACPI name. Used for the various sleep/wake methods. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2012-03-22ACPICA: Split sleep/wake functions into two filesBob Moore1-204/+3
The functions for the original/legacy sleep/wake registers are in hwsleep.c, and the functions for the new extended FADT V5 sleep registers are in hwesleep.c Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2012-03-22ACPICA: Distill multiple sleep method functions to a single functionBob Moore1-126/+27
Adds acpi_hw_execute_sleep_method to handle the various sleep methods such as _GTS, _BFS, _WAK, and _SST. Removes the specialized functions previously used for each of these methods. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2012-03-22ACPICA: Support for custom ACPICA build for ACPI 5 reduced hardwareBob Moore1-0/+2
Add ACPI_REDUCED_HARDWARE flag that removes all hardware-related code (about 10% code, 5% static data). Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2012-03-22ACPICA: ACPI 5: Support for new FADT SleepStatus, SleepControl registersBob Moore1-268/+298
Adds sleep and wake support for systems with these registers. One new file, hwxfsleep.c Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2012-03-22Merge branch 'stable/for-x86-for-3.4' of ↵Len Brown1-3/+7
git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen into tboot
2012-03-13x86, acpi, tboot: Have a ACPI os prepare sleep instead of calling tboot_sleep.Tang Liang1-3/+7
The ACPI suspend path makes a call to tboot_sleep right before it writes the PM1A, PM1B values. We replace the direct call to tboot via an registration callback similar to __acpi_register_gsi. CC: Len Brown <len.brown@intel.com> Acked-by: Joseph Cihula <joseph.cihula@intel.com> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> [v1: Added __attribute__ ((unused))] [v2: Introduced a wrapper instead of changing tboot_sleep return values] [v3: Added return value AE_CTRL_SKIP for acpi_os_sleep_prepare] Signed-off-by: Tang Liang <liang.tang@oracle.com> [v1: Fix compile issues on IA64 and PPC64] [v2: Fix where __acpi_os_prepare_sleep==NULL and did not go in sleep properly] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2012-01-17ACPICA: Update all copyrights to 2012Bob Moore1-1/+1
Update all copyrights to 2012. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2011-11-01acpi: add module.h to files implicitly using/relying on it.Paul Gortmaker1-0/+1
These files are using standard module API things like MODULE_AUTHOR etc. and so should not be relying on an implicit presence of the module.h header. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
2011-01-19ACPICA: Update all ACPICA copyrights and signons to 2011Bob Moore1-1/+1
Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2010-07-07ACPICA: Core: Replace all %d format specifiers with %u (unsigned)Bob Moore1-1/+1
With only a few exceptions, ACPICA does not use signed integers. Therefore, %d is incorrect. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2010-04-20ACPICA: Standardize integer output for ACPICA warnings/errorsBob Moore1-1/+1
Always use 0x prefix for hex output, use %u for integer output (all integers are unsigned.) Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2010-01-22ACPICA: Update all ACPICA copyrights and signons to 2010Bob Moore1-1/+1
Add 2010 copyright to all module headers and signons, including the Linux header. This affects virtually every file in the ACPICA core subsystem, iASL compiler, and all utilities. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-09-02x86, intel_txt: clean up the impact on generic code, unbreak non-x86Shane Wang1-1/+1
Move tboot.h from asm to linux to fix the build errors of intel_txt patch on non-X86 platforms. Remove the tboot code from generic code init/main.c and kernel/cpu.c. Signed-off-by: Shane Wang <shane.wang@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-07-21x86, intel_txt: Intel TXT Sx shutdown supportJoseph Cihula1-0/+3
Support for graceful handling of sleep states (S3/S4/S5) after an Intel(R) TXT launch. Without this patch, attempting to place the system in one of the ACPI sleep states (S3/S4/S5) will cause the TXT hardware to treat this as an attack and will cause a system reset, with memory locked. Not only may the subsequent memory scrub take some time, but the platform will be unable to enter the requested power state. This patch calls back into the tboot so that it may properly and securely clean up system state and clear the secrets-in-memory flag, after which it will place the system into the requested sleep state using ACPI information passed by the kernel. arch/x86/kernel/smpboot.c | 2 ++ drivers/acpi/acpica/hwsleep.c | 3 +++ kernel/cpu.c | 7 ++++++- 3 files changed, 11 insertions(+), 1 deletion(-) Signed-off-by: Joseph Cihula <joseph.cihula@intel.com> Signed-off-by: Shane Wang <shane.wang@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-04-18ACPI: Disable _GTS and _BFS support by defaultLen Brown1-17/+26
Executing BIOS code paths not exercised by Windows tends to get Linux into trouble. However, if a system does benefit from _GTS or _BFS, acpi.gts=1 an acpi.bfs=1 are now available to enable them. http://bugzilla.kernel.org/show_bug.cgi?id=13041 Signed-off-by: Len Brown <len.brown@intel.com>
2009-03-27ACPICA: New: I/O port protectionBob Moore1-1/+1
Protect certain I/O ports from reads/writes. Provides MS compatibility. New module, hwvalid.c Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-03-27ACPICA: Formatting update - no functional changesBob Moore1-8/+6
Split long lines, update comments. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-03-27ACPICA: Add manifest constants for bit register valuesBob Moore1-4/+10
Add and deploy constants for the PM status/enable/control registers. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-03-26ACPICA: Rename ACPI bit register access functionsBob Moore1-7/+8
Rename acpi_get_register and acpi_set_register to clarify the purpose of these functions. New names are acpi_read_bit_register and acpi_write_bit_register. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-03-26ACPICA: Optimize ACPI register lockingBob Moore1-1/+1
Removed locking for reads from the ACPI bit registers in PM1 Status, Enable, Control, and PM2 Control. The lock is not required when reading the single-bit registers. The acpi_get_register_unlocked function is no longer needed and has been removed. This will improve performance for reads on these registers. ACPICA BZ 760. http://www.acpica.org/bugzilla/show_bug.cgi?id=760 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-03-26ACPICA: Conditionally compile acpi_set_firmware_waking_vector64Bob Moore1-1/+4
This function is only needed on 64-bit host operating systems. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-03-26ACPICA: Add function to handle PM1 control registersBob Moore1-49/+35
Added acpi_hw_write_pm1_control. This function writes both of the PM1 control registers (A/B). These registers are different than than the PM1 A/B status and enable registers in that different values can be written to the A/B registers. Most notably, the SLP_TYP bits can be different, as per the values returned from the _Sx predefined methods. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-03-26ACPICA: Remove redundant ACPI_BITREG_SLEEP_TYPE_BBob Moore1-2/+2
This type is the same as TYPE_A. Removed this and all related instances. Renamed SLEEP_TYPE_A to simply SLEEP_TYPE. ACPICA BZ 754. http://www.acpica.org/bugzilla/show_bug.cgi?id=754 Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2009-01-09ACPICA: hide private headersLen Brown1-2/+2
Signed-off-by: Len Brown <len.brown@intel.com>
2009-01-09ACPICA: create acpica/ directoryLen Brown1-0/+629
also, delete sleep/ and delete ACPI_CFLAGS from Makefile Signed-off-by: Len Brown <len.brown@intel.com>
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