Add trace interface to elaborate all H/W error related information. v6 -> v5: format adjustment. v5 -> v4: Add physical mask(LSB) in trace. v4 -> v3: change ras trace dependency rule. v3 -> v2: minor adjustment according to the suggestion from Boris. v2 -> v1: spinlock is not needed anymore. Signed-off-by: Chen, Gong <gong.chen@xxxxxxxxxxxxxxx> --- drivers/acpi/Kconfig | 4 +++- drivers/acpi/acpi_extlog.c | 54 +++++++++++++++++++++++++++++++++++++++--- drivers/ras/ras.c | 1 + include/ras/ras_event.h | 59 ++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 114 insertions(+), 4 deletions(-) diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index a34a228..099a2d5 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -370,6 +370,7 @@ config ACPI_EXTLOG tristate "Extended Error Log support" depends on X86_MCE && X86_LOCAL_APIC select UEFI_CPER + select RAS_TRACE default n help Certain usages such as Predictive Failure Analysis (PFA) require @@ -384,6 +385,7 @@ config ACPI_EXTLOG Enhanced MCA Logging allows firmware to provide additional error information to system software, synchronous with MCE or CMCI. This - driver adds support for that functionality. + driver adds support for that functionality with corresponding + tracepoint which carries that information to userspace. endif # ACPI diff --git a/drivers/acpi/acpi_extlog.c b/drivers/acpi/acpi_extlog.c index c4a5d87..8815b73 100644 --- a/drivers/acpi/acpi_extlog.c +++ b/drivers/acpi/acpi_extlog.c @@ -16,6 +16,7 @@ #include <asm/mce.h> #include "apei/apei-internal.h" +#include <ras/ras_event.h> #define EXT_ELOG_ENTRY_MASK GENMASK_ULL(51, 0) /* elog entry address mask */ @@ -43,6 +44,9 @@ struct extlog_l1_head { static int old_edac_report_status; +static char mem_location[CPER_REC_LEN]; +static char dimm_location[CPER_REC_LEN]; + static u8 extlog_dsm_uuid[] __initdata = "663E35AF-CC10-41A4-88EA-5470AF055295"; /* L1 table related physical address */ @@ -69,6 +73,30 @@ static u32 l1_percpu_entry; #define ELOG_ENTRY_ADDR(phyaddr) \ (phyaddr - elog_base + (u8 *)elog_addr) +static void __trace_mem_error(const uuid_le *fru_id, char *fru_text, + u32 err_number, u8 severity, + struct cper_sec_mem_err *mem) +{ + u8 etype = ~0, pa_mask_lsb = ~0; + u64 pa = ~0ull; + + if (mem->validation_bits & CPER_MEM_VALID_ERROR_TYPE) + etype = mem->error_type; + + if (mem->validation_bits & CPER_MEM_VALID_PA) + pa = mem->physical_addr; + + if (mem->validation_bits & CPER_MEM_VALID_PA_MASK) + pa_mask_lsb = (u8)__ffs64(mem->physical_addr_mask); + + memset(mem_location, 0, CPER_REC_LEN); + cper_mem_err_location(mem, mem_location); + memset(dimm_location, 0, CPER_REC_LEN); + cper_dimm_err_location(mem, dimm_location); + trace_extlog_mem_event(err_number, etype, severity, pa, pa_mask_lsb, + fru_id, dimm_location, mem_location, fru_text); +} + static struct acpi_generic_status *extlog_elog_entry_check(int cpu, int bank) { int idx; @@ -137,8 +165,12 @@ static int extlog_print(struct notifier_block *nb, unsigned long val, struct mce *mce = (struct mce *)data; int bank = mce->bank; int cpu = mce->extcpu; - struct acpi_generic_status *estatus; - int rc; + struct acpi_generic_status *estatus, *tmp; + struct acpi_generic_data *gdata; + const uuid_le *fru_id = &NULL_UUID_LE; + char *fru_text = ""; + uuid_le *sec_type; + static u32 err_number; estatus = extlog_elog_entry_check(cpu, bank); if (estatus == NULL) @@ -148,7 +180,23 @@ static int extlog_print(struct notifier_block *nb, unsigned long val, /* clear record status to enable BIOS to update it again */ estatus->block_status = 0; - rc = print_extlog_rcd(NULL, (struct acpi_generic_status *)elog_buf, cpu); + tmp = (struct acpi_generic_status *)elog_buf; + print_extlog_rcd(NULL, tmp, cpu); + + /* log event via trace */ + err_number++; + gdata = (struct acpi_generic_data *)(tmp + 1); + if (gdata->validation_bits & CPER_SEC_VALID_FRU_ID) + fru_id = (uuid_le *)gdata->fru_id; + if (gdata->validation_bits & CPER_SEC_VALID_FRU_TEXT) + fru_text = gdata->fru_text; + sec_type = (uuid_le *)gdata->section_type; + if (!uuid_le_cmp(*sec_type, CPER_SEC_PLATFORM_MEM)) { + struct cper_sec_mem_err *mem_err = (void *)(gdata + 1); + if (gdata->error_data_length >= sizeof(*mem_err)) + __trace_mem_error(fru_id, fru_text, err_number, + (u8)gdata->error_severity, mem_err); + } return NOTIFY_STOP; } diff --git a/drivers/ras/ras.c b/drivers/ras/ras.c index 4cac43a..da227a3 100644 --- a/drivers/ras/ras.c +++ b/drivers/ras/ras.c @@ -23,4 +23,5 @@ static int __init ras_init(void) } subsys_initcall(ras_init); +EXPORT_TRACEPOINT_SYMBOL_GPL(extlog_mem_event); EXPORT_TRACEPOINT_SYMBOL_GPL(mc_event); diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h index acbcbb8..4d3bc92 100644 --- a/include/ras/ras_event.h +++ b/include/ras/ras_event.h @@ -9,6 +9,65 @@ #include <linux/edac.h> #include <linux/ktime.h> #include <linux/aer.h> +#include <linux/cper.h> + + +/* + * MCE Extended Error Log trace event + * + * These events are generated when hardware detects a corrected or + * uncorrected event. + */ + +/* memory trace event */ + +TRACE_EVENT(extlog_mem_event, + TP_PROTO(u32 error_number, + u8 etype, + u8 severity, + u64 pa, + u8 pa_mask_lsb, + const uuid_le *fru_id, + const char *dimm_info, + const char *mem_loc, + const char *fru_text), + + TP_ARGS(error_number, etype, severity, pa, pa_mask_lsb, fru_id, + dimm_info, mem_loc, fru_text), + + TP_STRUCT__entry( + __field(u32, error_number) + __field(u8, etype) + __field(u8, severity) + __field(u64, pa) + __field(u8, pa_mask_lsb) + __string(dimm_info, dimm_info) + __string(mem_loc, mem_loc) + __dynamic_array(char, fru, CPER_REC_LEN) + ), + + TP_fast_assign( + __entry->error_number = error_number; + __entry->etype = etype; + __entry->severity = severity; + __entry->pa = pa; + __entry->pa_mask_lsb = pa_mask_lsb; + __assign_str(dimm_info, dimm_info); + __assign_str(mem_loc, mem_loc); + snprintf(__get_dynamic_array(fru), CPER_REC_LEN - 1, + "FRU: %pUl %.20s", fru_id, fru_text); + ), + + TP_printk("%d %s error: %s %s physical addr: %016llx (mask lsb: %x), %s%s", + __entry->error_number, + cper_severity_str(__entry->severity), + cper_mem_err_type_str(__entry->etype), + __get_str(dimm_info), + __entry->pa, + __entry->pa_mask_lsb, + __get_str(mem_loc), + __get_str(fru)) +); /* * Hardware Events Report -- 2.0.0.rc2 -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html