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a08f82d080
ERST is a way provided by APEI to save and retrieve hardware error record to and from some simple persistent storage (such as flash). The Linux kernel support implementation is quite simple and workable in NMI context. So it can be used to save hardware error record into flash in hardware error exception or NMI handler, where other more complex persistent storage such as disk is not usable. After saving hardware error records via ERST in hardware error exception or NMI handler, the error records can be retrieved and logged into disk or network after a clean reboot. For more information about ERST, please refer to ACPI Specification version 4.0, section 17.4. This patch incorporate fixes from Jin Dongming. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> CC: Jin Dongming <jin.dongming@np.css.fujitsu.com> Signed-off-by: Len Brown <len.brown@intel.com>
35 lines
881 B
C
35 lines
881 B
C
/*
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* apei.h - ACPI Platform Error Interface
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*/
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#ifndef ACPI_APEI_H
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#define ACPI_APEI_H
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#include <linux/acpi.h>
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#include <linux/cper.h>
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#include <asm/ioctls.h>
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#define APEI_ERST_INVALID_RECORD_ID 0xffffffffffffffffULL
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#define APEI_ERST_CLEAR_RECORD _IOW('E', 1, u64)
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#define APEI_ERST_GET_RECORD_COUNT _IOR('E', 2, u32)
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#ifdef __KERNEL__
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extern int hest_disable;
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extern int erst_disable;
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typedef int (*apei_hest_func_t)(struct acpi_hest_header *hest_hdr, void *data);
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int apei_hest_parse(apei_hest_func_t func, void *data);
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int erst_write(const struct cper_record_header *record);
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ssize_t erst_get_record_count(void);
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int erst_get_next_record_id(u64 *record_id);
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ssize_t erst_read(u64 record_id, struct cper_record_header *record,
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size_t buflen);
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ssize_t erst_read_next(struct cper_record_header *record, size_t buflen);
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int erst_clear(u64 record_id);
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#endif
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#endif
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