Commit 2dfb7d51 authored by Chen, Gong's avatar Chen, Gong Committed by Tony Luck

trace, RAS: Add eMCA trace event interface

Add trace interface to elaborate all H/W error related information.
Signed-off-by: default avatarChen, Gong <gong.chen@linux.intel.com>
Acked-by: default avatarBorislav Petkov <bp@suse.de>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent d963cd95
......@@ -370,6 +370,7 @@ config ACPI_EXTLOG
tristate "Extended Error Log support"
depends on X86_MCE && X86_LOCAL_APIC
select UEFI_CPER
select RAS
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
......@@ -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 */
......@@ -137,8 +138,12 @@ 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_seq;
estatus = extlog_elog_entry_check(cpu, bank);
if (estatus == NULL)
......@@ -148,7 +153,23 @@ 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_seq++;
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 = (void *)(gdata + 1);
if (gdata->error_data_length >= sizeof(*mem))
trace_extlog_mem_event(mem, err_seq, fru_id, fru_text,
(u8)gdata->error_severity);
}
return NOTIFY_STOP;
}
......
......@@ -207,7 +207,7 @@ const char *cper_mem_err_type_str(unsigned int etype)
}
EXPORT_SYMBOL_GPL(cper_mem_err_type_str);
static int cper_mem_err_location(const struct cper_sec_mem_err *mem, char *msg)
static int cper_mem_err_location(struct cper_mem_err_compact *mem, char *msg)
{
u32 len, n;
......@@ -249,7 +249,7 @@ static int cper_mem_err_location(const struct cper_sec_mem_err *mem, char *msg)
return n;
}
static int cper_dimm_err_location(const struct cper_sec_mem_err *mem, char *msg)
static int cper_dimm_err_location(struct cper_mem_err_compact *mem, char *msg)
{
u32 len, n;
const char *bank = NULL, *device = NULL;
......@@ -271,8 +271,44 @@ static int cper_dimm_err_location(const struct cper_sec_mem_err *mem, char *msg)
return n;
}
void cper_mem_err_pack(const struct cper_sec_mem_err *mem,
struct cper_mem_err_compact *cmem)
{
cmem->validation_bits = mem->validation_bits;
cmem->node = mem->node;
cmem->card = mem->card;
cmem->module = mem->module;
cmem->bank = mem->bank;
cmem->device = mem->device;
cmem->row = mem->row;
cmem->column = mem->column;
cmem->bit_pos = mem->bit_pos;
cmem->requestor_id = mem->requestor_id;
cmem->responder_id = mem->responder_id;
cmem->target_id = mem->target_id;
cmem->rank = mem->rank;
cmem->mem_array_handle = mem->mem_array_handle;
cmem->mem_dev_handle = mem->mem_dev_handle;
}
const char *cper_mem_err_unpack(struct trace_seq *p,
struct cper_mem_err_compact *cmem)
{
const char *ret = p->buffer + p->len;
if (cper_mem_err_location(cmem, rcd_decode_str))
trace_seq_printf(p, "%s", rcd_decode_str);
if (cper_dimm_err_location(cmem, rcd_decode_str))
trace_seq_printf(p, "%s", rcd_decode_str);
trace_seq_putc(p, '\0');
return ret;
}
static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem)
{
struct cper_mem_err_compact cmem;
if (mem->validation_bits & CPER_MEM_VALID_ERROR_STATUS)
printk("%s""error_status: 0x%016llx\n", pfx, mem->error_status);
if (mem->validation_bits & CPER_MEM_VALID_PA)
......@@ -281,14 +317,15 @@ static void cper_print_mem(const char *pfx, const struct cper_sec_mem_err *mem)
if (mem->validation_bits & CPER_MEM_VALID_PA_MASK)
printk("%s""physical_address_mask: 0x%016llx\n",
pfx, mem->physical_addr_mask);
if (cper_mem_err_location(mem, rcd_decode_str))
cper_mem_err_pack(mem, &cmem);
if (cper_mem_err_location(&cmem, rcd_decode_str))
printk("%s%s\n", pfx, rcd_decode_str);
if (mem->validation_bits & CPER_MEM_VALID_ERROR_TYPE) {
u8 etype = mem->error_type;
printk("%s""error_type: %d, %s\n", pfx, etype,
cper_mem_err_type_str(etype));
}
if (cper_dimm_err_location(mem, rcd_decode_str))
if (cper_dimm_err_location(&cmem, rcd_decode_str))
printk("%s%s\n", pfx, rcd_decode_str);
}
......
......@@ -23,4 +23,7 @@ static int __init ras_init(void)
}
subsys_initcall(ras_init);
#if defined(CONFIG_ACPI_EXTLOG) || defined(CONFIG_ACPI_EXTLOG_MODULE)
EXPORT_TRACEPOINT_SYMBOL_GPL(extlog_mem_event);
#endif
EXPORT_TRACEPOINT_SYMBOL_GPL(mc_event);
......@@ -22,6 +22,7 @@
#define LINUX_CPER_H
#include <linux/uuid.h>
#include <linux/trace_seq.h>
/* CPER record signature and the size */
#define CPER_SIG_RECORD "CPER"
......@@ -363,6 +364,24 @@ struct cper_sec_mem_err {
__u16 mem_dev_handle; /* module handle in UEFI 2.4 */
};
struct cper_mem_err_compact {
__u64 validation_bits;
__u16 node;
__u16 card;
__u16 module;
__u16 bank;
__u16 device;
__u16 row;
__u16 column;
__u16 bit_pos;
__u64 requestor_id;
__u64 responder_id;
__u64 target_id;
__u16 rank;
__u16 mem_array_handle;
__u16 mem_dev_handle;
};
struct cper_sec_pcie {
__u64 validation_bits;
__u32 port_type;
......@@ -406,5 +425,9 @@ const char *cper_severity_str(unsigned int);
const char *cper_mem_err_type_str(unsigned int);
void cper_print_bits(const char *prefix, unsigned int bits,
const char * const strs[], unsigned int strs_size);
void cper_mem_err_pack(const struct cper_sec_mem_err *,
struct cper_mem_err_compact *);
const char *cper_mem_err_unpack(struct trace_seq *,
struct cper_mem_err_compact *);
#endif
......@@ -9,6 +9,70 @@
#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 */
#if defined(CONFIG_ACPI_EXTLOG) || defined(CONFIG_ACPI_EXTLOG_MODULE)
TRACE_EVENT(extlog_mem_event,
TP_PROTO(struct cper_sec_mem_err *mem,
u32 err_seq,
const uuid_le *fru_id,
const char *fru_text,
u8 sev),
TP_ARGS(mem, err_seq, fru_id, fru_text, sev),
TP_STRUCT__entry(
__field(u32, err_seq)
__field(u8, etype)
__field(u8, sev)
__field(u64, pa)
__field(u8, pa_mask_lsb)
__field_struct(uuid_le, fru_id)
__string(fru_text, fru_text)
__field_struct(struct cper_mem_err_compact, data)
),
TP_fast_assign(
__entry->err_seq = err_seq;
if (mem->validation_bits & CPER_MEM_VALID_ERROR_TYPE)
__entry->etype = mem->error_type;
else
__entry->etype = ~0;
__entry->sev = sev;
if (mem->validation_bits & CPER_MEM_VALID_PA)
__entry->pa = mem->physical_addr;
else
__entry->pa = ~0ull;
if (mem->validation_bits & CPER_MEM_VALID_PA_MASK)
__entry->pa_mask_lsb = (u8)__ffs64(mem->physical_addr_mask);
else
__entry->pa_mask_lsb = ~0;
__entry->fru_id = *fru_id;
__assign_str(fru_text, fru_text);
cper_mem_err_pack(mem, &__entry->data);
),
TP_printk("{%d} %s error: %s physical addr: %016llx (mask lsb: %x) %sFRU: %pUl %.20s",
__entry->err_seq,
cper_severity_str(__entry->sev),
cper_mem_err_type_str(__entry->etype),
__entry->pa,
__entry->pa_mask_lsb,
cper_mem_err_unpack(p, &__entry->data),
&__entry->fru_id,
__get_str(fru_text))
);
#endif
/*
* Hardware Events Report
......
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