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tracing: Add the ::ppin field to the mce_record tracepoint

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Machine Check Error information from 'struct mce' is exposed to userspace
through the mce_record tracepoint.

Currently, however, the PPIN (Protected Processor Inventory Number) field
of 'struct mce' is not exposed.

Add a PPIN field to the tracepoint as it provides a unique identifier for
the system (or socket in case of multi-socket systems) on which the MCE
has been received.

Also, add a comment explaining the kind of information that can be and
should be added to the tracepoint.

Signed-off-by: Avadhut Naik <avadhut.naik@amd.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Sohil Mehta <sohil.mehta@intel.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20240401171455.1737976-2-avadhut.naik@amd.com
This commit is contained in:
Avadhut Naik 2024-04-01 12:14:54 -05:00 committed by Ingo Molnar
parent ac5e80e94f
commit 98430645e3
1 changed files with 12 additions and 1 deletions
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13
include/trace/events/mce.h
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@ -9,6 +9,14 @@
#include <linux/tracepoint.h>
#include <asm/mce.h>
/*
* MCE Event Record.
*
* Only very relevant and transient information which cannot be
* gathered from a system by any other means or which can only be
* acquired arduously should be added to this record.
*/
TRACE_EVENT(mce_record,
TP_PROTO(struct mce *m),
@ -25,6 +33,7 @@ TRACE_EVENT(mce_record,
__field( u64, ipid )
__field( u64, ip )
__field( u64, tsc )
__field( u64, ppin )
__field( u64, walltime )
__field( u32, cpu )
__field( u32, cpuid )
@ -45,6 +54,7 @@ TRACE_EVENT(mce_record,
__entry->ipid = m->ipid;
__entry->ip = m->ip;
__entry->tsc = m->tsc;
__entry->ppin = m->ppin;
__entry->walltime = m->time;
__entry->cpu = m->extcpu;
__entry->cpuid = m->cpuid;
@ -55,7 +65,7 @@ TRACE_EVENT(mce_record,
__entry->cpuvendor = m->cpuvendor;
),
TP_printk("CPU: %d, MCGc/s: %llx/%llx, MC%d: %016Lx, IPID: %016Lx, ADDR: %016Lx, MISC: %016Lx, SYND: %016Lx, RIP: %02x:<%016Lx>, TSC: %llx, vendor: %u, CPUID: %x, time: %llu, socket: %u, APIC: %x",
TP_printk("CPU: %d, MCGc/s: %llx/%llx, MC%d: %016Lx, IPID: %016Lx, ADDR: %016Lx, MISC: %016Lx, SYND: %016Lx, RIP: %02x:<%016Lx>, TSC: %llx, PPIN: %llx, vendor: %u, CPUID: %x, time: %llu, socket: %u, APIC: %x",
__entry->cpu,
__entry->mcgcap, __entry->mcgstatus,
__entry->bank, __entry->status,
@ -65,6 +75,7 @@ TRACE_EVENT(mce_record,
__entry->synd,
__entry->cs, __entry->ip,
__entry->tsc,
__entry->ppin,
__entry->cpuvendor,
__entry->cpuid,
__entry->walltime,