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* ACPI: introduce module parameter acpi.aml_debug_outputZhang Rui2010-08-141-0/+2
| | | | | | | | | | | | | Introduce module parameter acpi.aml_debug_output. With acpi.aml_debug_output set, we can get AML debug object output (Store (AAA, Debug)), even with CONFIG_ACPI_DEBUG cleared. Together with the runtime custom method mechanism, we can debug AML code problems without rebuilding the kernel. Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* ACPI, APEI, EINJ injection parameters supportHuang Ying2010-05-191-0/+10
| | | | | | | | | | | | | | Some hardware error injection needs parameters, for example, it is useful to specify memory address and memory address mask for memory errors. Some BIOSes allow parameters to be specified via an unpublished extension. This patch adds support to it. The parameters will be ignored on machines without necessary BIOS support. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* ACPI, APEI, Document for APEIHuang Ying2010-05-191-0/+49
| | | | | | | | | Add document for APEI, including kernel parameters and EINJ debug file sytem interface. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* ACPI: support customizing ACPI control methods at runtimeZhang Rui2009-12-111-0/+66
| | | | | | | | | | | | | | Introduce a new debugfs I/F (/sys/kernel/debug/acpi/custom_method) for ACPI, which can be used to customize the ACPI control methods at runtime. We can use this to debug the AML code level bugs instead of overriding the whole DSDT table, without rebuilding/rebooting kernel any more. Detailed description about how to use this debugfs I/F is stated in Documentation/acpi/method-customizing.txt Signed-off-by: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
* ACPI: update debug parameter documentationBjorn Helgaas2008-11-071-0/+148
| | | | | | | | | | | | | Reformat acpi.debug_layer and acpi.debug_level documentation so it's more readable, add some clues about how to figure out the mask bits that enable a specific ACPI_DEBUG_PRINT statement, and include some useful examples. Move the list of masks to Documentation/acpi/debug.txt (these are copies of the authoritative values in acoutput.h and acpi_drivers.h). Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
* ACPI: Remove ACPI_CUSTOM_DSDT_INITRD optionLinus Torvalds2008-03-152-53/+2
| | | | | | | | | | | | | | | | | | | | | | | | | This essentially reverts commit 71fc47a9adf8ee89e5c96a47222915c5485ac437 ("ACPI: basic initramfs DSDT override support"), because the code simply isn't ready. It did ugly things to the init sequence to populate the rootfs image early, but that just ended up showing other problems with the whole approach. The fact is, the VFS layer simply isn't initialized this early, and the relevant ACPI code should either run much later, or this shouldn't be done at all. For 2.6.25, we'll just pick the latter option. We can revisit this concept later if necessary. Cc: Dave Hansen <haveblue@us.ibm.com> Cc: Tilman Schmidt <tilman@imap.cc> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Thomas Renninger <trenn@suse.de> Cc: Eric Piel <eric.piel@tremplin-utc.net> Cc: Len Brown <len.brown@intel.com> Cc: Christoph Hellwig <hch@infradead.org> Cc: Markus Gaugusch <dsdt@gaugusch.at> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branches 'release' and 'dsdt-override' into releaseLen Brown2008-02-072-0/+58
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| * ACPI: update DSDT override documentationLen Brown2008-02-073-99/+58
| | | | | | | | Signed-off-by: Len Brown <len.brown@intel.com>
| * ACPI: basic initramfs DSDT override supportMarkus Gaugusch2008-02-061-0/+99
| | | | | | | | | | | | | | | The basics of DSDT from initramfs. In case this option is selected, populate_rootfs() is called a bit earlier to have the initramfs content available during ACPI initialization. This is a very similar path to the one available at http://gaugusch.at/kernel.shtml but with some update in the documentation, default set to No and the change of populate_rootfs() the "Jeff Mahony way" (which avoids reading the initramfs twice). Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Eric Piel <eric.piel@tremplin-utc.net> Signed-off-by: Len Brown <len.brown@intel.com>
* ACPI: document method tracing hooksLen Brown2007-11-191-0/+26
Signed-off-by: Len Brown <len.brown@intel.com>