67eb2e9907
Some APEI GHES recoverable errors are reported via NMI, but printk is not safe in NMI context. To solve the issue, a lock-less memory allocator is used to allocate memory in NMI handler, save the error record into the allocated memory, put the error record into a lock-less list. On the other hand, an irq_work is used to delay the operation from NMI context to IRQ context. The irq_work IRQ handler will remove nodes from lock-less list, printk the error record and do some further processing include recovery operation, then free the memory. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
51 lines
1.7 KiB
Plaintext
51 lines
1.7 KiB
Plaintext
config ACPI_APEI
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bool "ACPI Platform Error Interface (APEI)"
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select MISC_FILESYSTEMS
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select PSTORE
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depends on X86
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help
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APEI allows to report errors (for example from the chipset)
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to the operating system. This improves NMI handling
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especially. In addition it supports error serialization and
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error injection.
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config ACPI_APEI_GHES
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bool "APEI Generic Hardware Error Source"
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depends on ACPI_APEI && X86
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select ACPI_HED
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select LLIST
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select GENERIC_ALLOCATOR
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help
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Generic Hardware Error Source provides a way to report
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platform hardware errors (such as that from chipset). It
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works in so called "Firmware First" mode, that is, hardware
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errors are reported to firmware firstly, then reported to
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Linux by firmware. This way, some non-standard hardware
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error registers or non-standard hardware link can be checked
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by firmware to produce more valuable hardware error
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information for Linux.
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config ACPI_APEI_PCIEAER
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bool "APEI PCIe AER logging/recovering support"
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depends on ACPI_APEI && PCIEAER
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help
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PCIe AER errors may be reported via APEI firmware first mode.
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Turn on this option to enable the corresponding support.
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config ACPI_APEI_EINJ
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tristate "APEI Error INJection (EINJ)"
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depends on ACPI_APEI && DEBUG_FS
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help
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EINJ provides a hardware error injection mechanism, it is
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mainly used for debugging and testing the other parts of
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APEI and some other RAS features.
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config ACPI_APEI_ERST_DEBUG
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tristate "APEI Error Record Serialization Table (ERST) Debug Support"
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depends on ACPI_APEI
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help
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ERST is a way provided by APEI to save and retrieve hardware
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error information to and from a persistent store. Enable this
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if you want to debugging and testing the ERST kernel support
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and firmware implementation.
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