linux/drivers/acpi/acpica
Lv Zheng 0f929fbf0d ACPICA: Tables: Add new mechanism to skip NULL entries in RSDT and XSDT.
It is reported that there are buggy BIOSes in the world: AMI uses an XSDT
compiler for early BIOSes, this compiler will generate XSDT with a NULL
entry.  The affected BIOS versions are "AMI BIOS F2-F4".

Original solution on Linux is to use an alternative heathy root table
instead of the ill one.  This commit is:
  Commit: 671cc68dc6
  Subject: ACPICA: Back port and refine validation of the XSDT root table.

This is an example of such XSDT dumped from B85-HD3 (AMI F3 BIOS):
[000h 0000   4]                    Signature : "XSDT"    [Extended System Description Table]
[004h 0004   4]                 Table Length : 00000074
[008h 0008   1]                     Revision : 01
[009h 0009   1]                     Checksum : 18
[00Ah 0010   6]                       Oem ID : "ALASKA"
[010h 0016   8]                 Oem Table ID : "A M I"
[018h 0024   4]                 Oem Revision : 01072009
[01Ch 0028   4]              Asl Compiler ID : "AMI "
[020h 0032   4]        Asl Compiler Revision : 00010013

[024h 0036   8]       ACPI Table Address   0 : 00000000BA5F8180
[02Ch 0044   8]       ACPI Table Address   1 : 00000000BA5F8290
[034h 0052   8]       ACPI Table Address   2 : 00000000BA5F8308
[03Ch 0060   8]       ACPI Table Address   3 : 00000000BA5F8848
[044h 0068   8]       ACPI Table Address   4 : 00000000BA5F9320
[04Ch 0076   8]       ACPI Table Address   5 : 00000000BA5F9360
[054h 0084   8]       ACPI Table Address   6 : 00000000BA5F9398
[05Ch 0092   8]       ACPI Table Address   7 : 00000000BA5F9708
[064h d100   8]       ACPI Table Address   8 : 00000000BA5FC9A8
[06Ch 0108   8]       ACPI Table Address   9 : 0000000000000000

But according to the bug report, the XSDT in fact is not broken. In the
above XSDT, ACPI Table Address 1-8 contains the same value as RSDT.  The
differences can only be seen on the following 2 entries:
1. The first entry points to a FADT whose Revision is 5 while the first
   entry in RSDT points to a FADT whose Revision is 2.
   The FADT dumped from the address indicated by the first entry of XSDT:
    FACP @ 0x00000000BA5F8180
      0000: 46 41 43 50 0C 01 00 00<05>4B 41 4C 41 53 4B 41  FACP.....KALASKA
      ...
   The FADT dumped from the address indicated by the first entry of RSDT:
    FACP @ 0x00000000BA5ED0F0
      0000: 46 41 43 50 84 00 00 00<02>A7 41 4C 41 53 4B 41  FACP......ALASKA
      ...
2. The last entry is a NULL terminator.
According to the test result, the Revision 5 FADT is accessible.  Thus the
original solution turns out to be a work around that is preventing the
higher revision tables to be used for such platforms (they are all x86-64
platforms, and should use XSDT and higher revision FADT).

This patch offers a new solution, where a sanity check is performed before
installing a table address from XSDT. If the entry is NULL, it is simply
discarded.

Note that, this patch doesn't remove the original solution, so for Linux
kernel, this commit is actually a no-op, but it allows acpidump to be
working on such platforms. By doing so, we allow another easy revertable
commit to enable this feature so that when that commit is reverted, the
useful sanity check will not be affected. Lv Zheng.

References: https://bugzilla.kernel.org/show_bug.cgi?id=73911
References: https://bugs.archlinux.org/task/39811
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Reported-and-tested-by: Bruce Chiarelli <mano155@gmail.com>
Reported-and-tested-by: Spyros Stathopoulos <spystath@gmail.com>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-05-07 00:55:02 +02:00
..
acapps.h ACPICA: acpidump: Add support to generate acpidump release. 2014-04-20 22:59:40 +02:00
accommon.h ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
acdebug.h ACPICA: Revert "Headers: Deploy #pragma pack (push) and (pop)." 2014-03-18 01:53:45 +01:00
acdispat.h ACPICA: Add auto-serialization support for ill-behaved control methods. 2014-03-26 16:25:59 +01:00
acevents.h ACPICA: Revert "Headers: Deploy #pragma pack (push) and (pop)." 2014-03-18 01:53:45 +01:00
acglobal.h ACPICA: Update global variable definitions. No functional change. 2014-05-07 00:54:59 +02:00
achware.h ACPICA: Revert "Headers: Deploy #pragma pack (push) and (pop)." 2014-03-18 01:53:45 +01:00
acinterp.h ACPICA: Remove global option to serialize all control methods. 2014-03-26 16:25:59 +01:00
aclocal.h ACPICA: Disassembler: Add support to decode _HID and _CID values. 2014-04-20 22:59:37 +02:00
acmacros.h ACPICA: Revert "Headers: Deploy #pragma pack (push) and (pop)." 2014-03-18 01:53:45 +01:00
acnamesp.h ACPICA: Revert "Headers: Deploy #pragma pack (push) and (pop)." 2014-03-18 01:53:45 +01:00
acobject.h ACPICA: Ignore sync_level for methods that have been auto-serialized. 2014-03-26 16:25:59 +01:00
acopcode.h ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
acparser.h ACPICA: Revert "Headers: Deploy #pragma pack (push) and (pop)." 2014-03-18 01:53:45 +01:00
acpredef.h ACPICA: Add support for _LPD and _PRP methods. 2014-05-07 00:55:00 +02:00
acresrc.h ACPICA: Revert "Headers: Deploy #pragma pack (push) and (pop)." 2014-03-18 01:53:45 +01:00
acstruct.h ACPICA: Add auto-serialization support for ill-behaved control methods. 2014-03-26 16:25:59 +01:00
actables.h ACPICA: Table Manager: Split tbinstal.c into two files. 2014-04-20 22:59:39 +02:00
acutils.h ACPICA: acpidump: Update new structures and add missing file. 2014-04-20 22:59:40 +02:00
amlcode.h ACPICA: Revert "Headers: Deploy #pragma pack (push) and (pop)." 2014-03-18 01:53:45 +01:00
amlresrc.h ACPICA: Revert "Headers: Deploy #pragma pack (push) and (pop)." 2014-03-18 01:53:45 +01:00
dsargs.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
dscontrol.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
dsfield.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
dsinit.c ACPICA: Add auto-serialization support for ill-behaved control methods. 2014-03-26 16:25:59 +01:00
dsmethod.c ACPICA: Ignore sync_level for methods that have been auto-serialized. 2014-03-26 16:25:59 +01:00
dsmthdat.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
dsobject.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
dsopcode.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
dsutils.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
dswexec.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
dswload2.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
dswload.c ACPICA: Add auto-serialization support for ill-behaved control methods. 2014-03-26 16:25:59 +01:00
dswscope.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
dswstate.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evevent.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evglock.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evgpe.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evgpeblk.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evgpeinit.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evgpeutil.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evhandler.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evmisc.c ACPICA: Disassembler: Add decoding of Notify() values. 2014-04-20 22:59:37 +02:00
evregion.c ACPICA: Prevent infinite loops when traversing corrupted lists. 2014-03-18 01:52:18 +01:00
evrgnini.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evsci.c ACPICA: Update comments for ACPICA name - no functional change. 2014-04-20 22:59:37 +02:00
evxface.c ACPICA: Update use of acpi_os_wait_events_complete interface. 2014-04-20 22:59:37 +02:00
evxfevnt.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evxfgpe.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
evxfregn.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exconfig.c ACPICA: Table Manager: Misc cleanup and renames, no functional change. 2014-04-20 22:59:39 +02:00
exconvrt.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
excreate.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exdebug.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exdump.c ACPICA: Add a missing field for debug dump of mutex objects. 2014-04-20 22:59:38 +02:00
exfield.c ACPICA: Fix buffer allocation issue for generic_serial_bus region accesses. 2014-04-21 23:12:12 +02:00
exfldio.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exmisc.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exmutex.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exnames.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exoparg1.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exoparg2.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exoparg3.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exoparg6.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exprep.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exregion.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exresnte.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exresolv.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exresop.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exstore.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exstoren.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exstorob.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
exsystem.c ACPICA: Remove global option to serialize all control methods. 2014-03-26 16:25:59 +01:00
exutils.c ACPICA: Remove global option to serialize all control methods. 2014-03-26 16:25:59 +01:00
hwacpi.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
hwesleep.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
hwgpe.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
hwpci.c ACPICA: Update handling of PCI ID lists. 2014-05-07 00:55:00 +02:00
hwregs.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
hwsleep.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
hwtimer.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
hwvalid.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
hwxface.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
hwxfsleep.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
Makefile ACPICA: Table Manager: Split tbinstal.c into two files. 2014-04-20 22:59:39 +02:00
nsaccess.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsalloc.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsarguments.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsconvert.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsdump.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsdumpdv.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nseval.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsinit.c ACPICA: Add auto-serialization support for ill-behaved control methods. 2014-03-26 16:25:59 +01:00
nsload.c ACPICA: Add auto-serialization support for ill-behaved control methods. 2014-03-26 16:25:59 +01:00
nsnames.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsobject.c ACPICA: Prevent infinite loops when traversing corrupted lists. 2014-03-18 01:52:18 +01:00
nsparse.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nspredef.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsprepkg.c ACPICA: Comment update - no functional change. 2014-03-18 01:47:30 +01:00
nsrepair2.c ACPICA: Comment update - no functional change. 2014-03-18 01:47:30 +01:00
nsrepair.c ACPICA: Comment update - no functional change. 2014-03-18 01:47:30 +01:00
nssearch.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsutils.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nswalk.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsxfeval.c Merge branch 'acpica' 2014-03-20 13:25:02 +01:00
nsxfname.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
nsxfobj.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
psargs.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
psloop.c ACPICA: Add auto-serialization support for ill-behaved control methods. 2014-03-26 16:25:59 +01:00
psobject.c ACPICA: Add auto-serialization support for ill-behaved control methods. 2014-03-26 16:25:59 +01:00
psopcode.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
psopinfo.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
psparse.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
psscope.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
pstree.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
psutils.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
pswalk.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
psxface.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
rsaddr.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
rscalc.c ACPICA: Comment update - no functional change. 2014-03-18 01:47:30 +01:00
rscreate.c ACPICA: Update acpi_buffer_to_resource interface. 2014-05-07 00:55:00 +02:00
rsdump.c ACPICA: Update conditional compilation flags for resource dump functions. 2014-02-27 00:45:59 +01:00
rsdumpinfo.c ACPICA: Update the conditions to enable the utility resource dump strings. 2014-02-11 00:30:25 +01:00
rsinfo.c ACPICA: Update the conditions to enable the utility resource dump strings. 2014-02-11 00:30:25 +01:00
rsio.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
rsirq.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
rslist.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
rsmemory.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
rsmisc.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
rsserial.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
rsutils.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
rsxface.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
tbdata.c ACPICA: Table Manager: Split tbinstal.c into two files. 2014-04-20 22:59:39 +02:00
tbfadt.c ACPICA: Tables: Fix table checksums verification before installation. 2014-04-20 22:59:39 +02:00
tbfind.c ACPICA: Tables: Clean up split INSTALLED/VALIDATED table state logics. 2014-04-20 22:59:38 +02:00
tbinstal.c ACPICA: Table Manager: Split tbinstal.c into two files. 2014-04-20 22:59:39 +02:00
tbprint.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
tbutils.c ACPICA: Tables: Add new mechanism to skip NULL entries in RSDT and XSDT. 2014-05-07 00:55:02 +02:00
tbxface.c ACPICA: Table Manager: Misc cleanup and renames, no functional change. 2014-04-20 22:59:39 +02:00
tbxfload.c ACPICA: Table Manager: Misc cleanup and renames, no functional change. 2014-04-20 22:59:39 +02:00
tbxfroot.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utaddress.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utalloc.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utbuffer.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utcache.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utcopy.c ACPICA: Correctly support references in the union acpi_object. 2014-02-11 00:30:25 +01:00
utdebug.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utdecode.c ACPICA: Disassembler: Add decoding of Notify() values. 2014-04-20 22:59:37 +02:00
utdelete.c ACPICA: Prevent infinite loops when traversing corrupted lists. 2014-03-18 01:52:18 +01:00
uterror.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
uteval.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utexcep.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utglobal.c ACPICA: OSL: Move external globals from utglobal.c to acpixf.h using ACPI_INIT_GLOBAL/ACPI_GLOBAL. 2014-05-07 00:55:00 +02:00
utids.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utinit.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utlock.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utmath.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utmisc.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utmutex.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utobject.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utosi.c ACPICA: Add text: ACPICA policy for new _OSI strings. No functional change. 2014-03-18 01:52:17 +01:00
utownerid.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utpredef.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utresrc.c ACPICA: Update the conditions to enable the utility resource dump strings. 2014-02-11 00:30:25 +01:00
utstate.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utstring.c ACPICA: utstring: Check array index bound before use. 2014-04-20 22:59:37 +02:00
uttrack.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utxface.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utxferror.c ACPICA: OSL: Add configurability for error message functions. 2014-05-07 00:55:01 +02:00
utxfinit.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00
utxfmutex.c ACPICA: Update ACPICA copyrights to 2014. 2014-02-11 00:30:25 +01:00