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2010-12-13ACPI, APEI, Add APEI generic error status printing supportHuang Ying
In APEI, Hardware error information reported by firmware to Linux kernel is in the data structure of APEI generic error status (struct acpi_hes_generic_status). While now printk is used by Linux kernel to report hardware error information to user space. So, this patch adds printing support for the data structure, so that the corresponding hardware error information can be reported to user space via printk. PCIe AER information printing is not implemented yet. Will refactor the original PCIe AER information printing code to avoid code duplicating. The output format is as follow: <error record> := APEI generic hardware error status severity: <integer>, <severity string> section: <integer>, severity: <integer>, <severity string> flags: <integer> <section flags strings> fru_id: <uuid string> fru_text: <string> section_type: <section type string> <section data> <severity string>* := recoverable | fatal | corrected | info <section flags strings># := [primary][, containment warning][, reset][, threshold exceeded]\ [, resource not accessible][, latent error] <section type string> := generic processor error | memory error | \ PCIe error | unknown, <uuid string> <section data> := <generic processor section data> | <memory section data> | \ <pcie section data> | <null> <generic processor section data> := [processor_type: <integer>, <proc type string>] [processor_isa: <integer>, <proc isa string>] [error_type: <integer> <proc error type strings>] [operation: <integer>, <proc operation string>] [flags: <integer> <proc flags strings>] [level: <integer>] [version_info: <integer>] [processor_id: <integer>] [target_address: <integer>] [requestor_id: <integer>] [responder_id: <integer>] [IP: <integer>] <proc type string>* := IA32/X64 | IA64 <proc isa string>* := IA32 | IA64 | X64 <processor error type strings># := [cache error][, TLB error][, bus error][, micro-architectural error] <proc operation string>* := unknown or generic | data read | data write | \ instruction execution <proc flags strings># := [restartable][, precise IP][, overflow][, corrected] <memory section data> := [error_status: <integer>] [physical_address: <integer>] [physical_address_mask: <integer>] [node: <integer>] [card: <integer>] [module: <integer>] [bank: <integer>] [device: <integer>] [row: <integer>] [column: <integer>] [bit_position: <integer>] [requestor_id: <integer>] [responder_id: <integer>] [target_id: <integer>] [error_type: <integer>, <mem error type string>] <mem error type string>* := unknown | no error | single-bit ECC | multi-bit ECC | \ single-symbol chipkill ECC | multi-symbol chipkill ECC | master abort | \ target abort | parity error | watchdog timeout | invalid address | \ mirror Broken | memory sparing | scrub corrected error | \ scrub uncorrected error <pcie section data> := [port_type: <integer>, <pcie port type string>] [version: <integer>.<integer>] [command: <integer>, status: <integer>] [device_id: <integer>:<integer>:<integer>.<integer> slot: <integer> secondary_bus: <integer> vendor_id: <integer>, device_id: <integer> class_code: <integer>] [serial number: <integer>, <integer>] [bridge: secondary_status: <integer>, control: <integer>] <pcie port type string>* := PCIe end point | legacy PCI end point | \ unknown | unknown | root port | upstream switch port | \ downstream switch port | PCIe to PCI/PCI-X bridge | \ PCI/PCI-X to PCIe bridge | root complex integrated endpoint device | \ root complex event collector Where, [] designate corresponding content is optional All <field string> description with * has the following format: field: <integer>, <field string> Where value of <integer> should be the position of "string" in <field string> description. Otherwise, <field string> will be "unknown". All <field strings> description with # has the following format: field: <integer> <field strings> Where each string in <fields strings> corresponding to one set bit of <integer>. The bit position is the position of "string" in <field strings> description. For more detailed explanation of every field, please refer to UEFI specification version 2.3 or later, section Appendix N: Common Platform Error Record. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
2010-08-14ACPI: introduce module parameter acpi.aml_debug_outputZhang Rui
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>
2010-05-19ACPI, APEI, EINJ injection parameters supportHuang Ying
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>
2010-05-19ACPI, APEI, Document for APEIHuang Ying
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>
2009-12-11ACPI: support customizing ACPI control methods at runtimeZhang Rui
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>
2008-11-07ACPI: update debug parameter documentationBjorn Helgaas
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>
2008-03-15ACPI: Remove ACPI_CUSTOM_DSDT_INITRD optionLinus Torvalds
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>
2008-02-07Merge branches 'release' and 'dsdt-override' into releaseLen Brown
2008-02-07ACPI: update DSDT override documentationLen Brown
Signed-off-by: Len Brown <len.brown@intel.com>
2008-02-06ACPI: basic initramfs DSDT override supportMarkus Gaugusch
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>
2007-11-19ACPI: document method tracing hooksLen Brown
Signed-off-by: Len Brown <len.brown@intel.com>