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9874647ba1
linux/drivers/acpi/acpica
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Rafael J. Wysocki 9874647ba1 ACPI / ACPICA: Do not execute _PRW methods during initialization 
Currently, during initialization ACPICA walks the entire ACPI
namespace in search of any device objects with assciated _PRW
methods.  All of the _PRW methods found are executed in the process
to extract the GPE information returned by them, so that the GPEs in
question can be marked as "able to wakeup" (more precisely, the
ACPI_GPE_CAN_WAKE flag is set for them).  The only purpose of this
exercise is to avoid enabling the CAN_WAKE GPEs automatically, even
if there are _Lxx/_Exx methods associated with them.  However, it is
both costly and unnecessary, because the host OS has to execute the
_PRW methods anyway to check which devices can wake up the system
from sleep states.  Moreover, it then uses full information
returned by _PRW, including the GPE information, so it can take care
of disabling the GPEs if necessary.

Remove the code that walks the namespace and executes _PRW from
ACPICA and modify comments to reflect that change.  Make
acpi_bus_set_run_wake_flags() disable GPEs for wakeup devices
so that they don't cause spurious wakeup events to be signaled.
This not only reduces the complexity of the ACPICA initialization
code, but in some cases it should reduce the kernel boot time as
well.

Unfortunately, for this purpose we need a new ACPICA function,
acpi_gpe_can_wake(), to be called by the host OS in order to disable
the GPEs that can wake up the system and were previously enabled by
acpi_ev_initialize_gpe_block() or acpi_ev_update_gpes() (such a GPE
should be disabled only once, because the initialization code enables
it only once, but it may be pointed to by _PRW for multiple devices
and that's why the additional function is necessary).

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
2010-07-12 14:17:39 -04:00
..
accommon.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
acconfig.h ACPICA: Limit maximum time for Sleep() operator 2010-06-12 00:55:17 -04:00
acdebug.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
acdispat.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
acevents.h ACPICA: Use low-level GPE enable during GPE block initialization 2010-07-06 22:34:27 -04:00
acglobal.h ACPI / ACPICA: Do not execute _PRW methods during initialization 2010-07-12 14:17:39 -04:00
achware.h ACPICA: Remove obsolete GPE function 2010-07-06 22:34:27 -04:00
acinterp.h ACPICA: Rename acpi_ex_system_do_suspend->acpi_ex_system_do_sleep 2010-05-06 03:05:54 -04:00
aclocal.h ACPICA: Remove wakeup GPE reference counting which is not used 2010-07-06 22:34:26 -04:00
acmacros.h ACPICA: Remove obsolete ACPI_INTEGER (acpi_integer) type 2010-01-22 12:30:06 -05:00
acnamesp.h ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
acobject.h ACPICA: Update flags for operand object 2010-07-06 22:33:56 -04:00
acopcode.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
acparser.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
acpredef.h ACPICA: iASL/Core: Add support for _WDG/_WED MS methods 2010-07-06 22:33:55 -04:00
acresrc.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
acstruct.h ACPICA: Expand device initialization counters to 32 bits 2010-07-06 22:33:56 -04:00
actables.h ACPICA: Update DSDT copy/detection. 2010-04-20 10:43:16 -04:00
acutils.h ACPICA: Remove obsolete ACPI_INTEGER (acpi_integer) type 2010-01-22 12:30:06 -05:00
amlcode.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
amlresrc.h ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
dsfield.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
dsinit.c ACPICA: Expand initialization counters to 32 bits 2010-07-06 22:33:55 -04:00
dsmethod.c ACPICA: Optimization: Reduce the number of namespace walks 2010-07-06 22:33:57 -04:00
dsmthdat.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
dsobject.c ACPICA: Fix for Alias references within Package objects 2010-07-06 22:34:27 -04:00
dsopcode.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
dsutils.c ACPICA: Core: Replace all %d format specifiers with %u (unsigned) 2010-07-06 22:33:55 -04:00
dswexec.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
dswload.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
dswscope.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
dswstate.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
evevent.c ACPI / ACPICA: Do not execute _PRW methods during initialization 2010-07-12 14:17:39 -04:00
evgpe.c ACPICA: Remove obsolete GPE function 2010-07-06 22:34:27 -04:00
evgpeblk.c ACPI / ACPICA: Do not execute _PRW methods during initialization 2010-07-12 14:17:39 -04:00
evgpeinit.c ACPI / ACPICA: Do not execute _PRW methods during initialization 2010-07-12 14:17:39 -04:00
evgpeutil.c ACPICA: Split large file, evgpeblk 2010-05-06 03:05:54 -04:00
evmisc.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
evregion.c ACPICA: Remove obsolete ACPI_INTEGER (acpi_integer) type 2010-01-22 12:30:06 -05:00
evrgnini.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
evsci.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
evxface.c ACPI / ACPICA: Do not attempt to disable GPE when installing handler 2010-06-11 18:40:43 -04:00
evxfevnt.c ACPI / ACPICA: Do not execute _PRW methods during initialization 2010-07-12 14:17:39 -04:00
evxfregn.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
exconfig.c ACPI / ACPICA: Do not execute _PRW methods during initialization 2010-07-12 14:17:39 -04:00
exconvrt.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
excreate.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
exdebug.c ACPICA: Enhance configuration for output of AML Debug Object 2010-04-20 10:42:49 -04:00
exdump.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
exfield.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
exfldio.c ACPICA: Core: Replace all %d format specifiers with %u (unsigned) 2010-07-06 22:33:55 -04:00
exmisc.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
exmutex.c ACPICA: Update comments/headers, no functional change 2010-04-20 10:43:15 -04:00
exnames.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
exoparg1.c ACPICA: Rename acpi_ex_system_do_suspend->acpi_ex_system_do_sleep 2010-05-06 03:05:54 -04:00
exoparg2.c ACPICA: Minimize the differences between linux GPE code and ACPICA code base 2010-04-20 10:43:16 -04:00
exoparg3.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
exoparg6.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
exprep.c ACPICA: Update flags for operand object 2010-07-06 22:33:56 -04:00
exregion.c ACPICA: Core: Replace all %d format specifiers with %u (unsigned) 2010-07-06 22:33:55 -04:00
exresnte.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
exresolv.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
exresop.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
exstore.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
exstoren.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
exstorob.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
exsystem.c ACPICA: Limit maximum time for Sleep() operator 2010-06-12 00:55:17 -04:00
exutils.c ACPICA: Remove obsolete ACPI_INTEGER (acpi_integer) type 2010-01-22 12:30:06 -05:00
hwacpi.c ACPICA: simplify SCI_EN workaround 2010-05-12 00:37:59 -04:00
hwgpe.c ACPICA: Remove obsolete GPE function 2010-07-06 22:34:27 -04:00
hwregs.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
hwsleep.c ACPICA: Core: Replace all %d format specifiers with %u (unsigned) 2010-07-06 22:33:55 -04:00
hwtimer.c ACPICA: Remove obsolete ACPI_INTEGER (acpi_integer) type 2010-01-22 12:30:06 -05:00
hwvalid.c ACPICA: Truncate I/O addresses to 16 bits for Windows compatibility 2010-06-12 00:55:50 -04:00
hwxface.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
Makefile ACPICA: Split large file, evgpeblk 2010-05-06 03:05:54 -04:00
nsaccess.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
nsalloc.c ACPICA: Optimization: Reduce the number of namespace walks 2010-07-06 22:33:57 -04:00
nsdump.c ACPICA: Core: Replace all %d format specifiers with %u (unsigned) 2010-07-06 22:33:55 -04:00
nsdumpdv.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
nseval.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
nsinit.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
nsload.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
nsnames.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
nsobject.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
nsparse.c ACPICA: Core: Replace all %d format specifiers with %u (unsigned) 2010-07-06 22:33:55 -04:00
nspredef.c ACPICA: Predefined name repair: fix NULL package elements 2010-01-22 12:30:06 -05:00
nsrepair2.c ACPICA: Add comment: _BCL cannot be sorted on the fly 2010-07-06 22:33:54 -04:00
nsrepair.c ACPICA: Fix lint warning for 64-bit constant 2010-07-06 22:34:27 -04:00
nssearch.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
nsutils.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
nswalk.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
nsxfeval.c ACPICA: AcpiGetDevices: Eliminate unnecessary _STA calls 2010-01-22 12:30:05 -05:00
nsxfname.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
nsxfobj.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
psargs.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
psloop.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
psopcode.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
psparse.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
psscope.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
pstree.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
psutils.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
pswalk.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
psxface.c ACPICA: Add subsystem option to force copy of DSDT to local memory 2010-04-20 10:43:16 -04:00
rsaddr.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
rscalc.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
rscreate.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
rsdump.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
rsinfo.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
rsio.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
rsirq.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
rslist.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
rsmemory.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
rsmisc.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
rsutils.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
rsxface.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
tbfadt.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
tbfind.c ACPICA: Clarify/rename some root table descriptor fields 2010-05-06 03:05:54 -04:00
tbinstal.c ACPICA: Clarify/rename some root table descriptor fields 2010-05-06 03:05:54 -04:00
tbutils.c ACPICA: Clarify/rename some root table descriptor fields 2010-05-06 03:05:54 -04:00
tbxface.c ACPICA: Clarify/rename some root table descriptor fields 2010-05-06 03:05:54 -04:00
tbxfroot.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
utalloc.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
utcopy.c ACPICA: Prevent possible allocation overrun during object copy 2010-05-06 03:05:54 -04:00
utdebug.c ACPICA: Remove obsolete ACPI_INTEGER (acpi_integer) type 2010-01-22 12:30:06 -05:00
utdelete.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
uteval.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
utglobal.c ACPICA: Performance enhancement for namespace search and access 2010-07-06 22:33:56 -04:00
utids.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
utinit.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
utlock.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
utmath.c ACPICA: Remove obsolete ACPI_INTEGER (acpi_integer) type 2010-01-22 12:30:06 -05:00
utmisc.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
utmutex.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
utobject.c ACPICA: Standardize integer output for ACPICA warnings/errors 2010-04-20 10:42:52 -04:00
utresrc.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
utstate.c ACPICA: Update all ACPICA copyrights and signons to 2010 2010-01-22 12:30:05 -05:00
utxface.c ACPI / ACPICA: Do not execute _PRW methods during initialization 2010-07-12 14:17:39 -04:00