linux-kernel - [PATCH 2/4] mce: Add a msg string to the MCE tracepoint

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1330698314-9863-3-git-send-email-bp@amd64.org>
Date:	Fri,  2 Mar 2012 15:25:12 +0100
From:	Borislav Petkov <bp@...64.org>
To:	Tony Luck <tony.luck@...el.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	EDAC devel <linux-edac@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Borislav Petkov <borislav.petkov@....com>
Subject: [PATCH 2/4] mce: Add a msg string to the MCE tracepoint

From: Borislav Petkov <borislav.petkov@....com>

The idea here is to pass an additional decoded MCE message through
the tracepoint and into the ring buffer for userspace to consume. The
designated consumers are RAS daemons and other tools collecting RAS
information.

Drop unneeded fields while at it, thus saving some room in the ring
buffer.

Signed-off-by: Borislav Petkov <borislav.petkov@....com>
---
 arch/x86/kernel/cpu/mcheck/mce.c |    2 +-
 include/trace/events/mce.h       |   14 ++++++--------
 2 files changed, 7 insertions(+), 9 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index a30d7af18e66..b28800443045 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -143,7 +143,7 @@ void mce_log(struct mce *mce)
 	int ret = 0;
 
 	/* Emit the trace record: */
-	trace_mce_record(mce);
+	trace_mce_record("", mce);
 
 	ret = atomic_notifier_call_chain(&x86_mce_decoder_chain, 0, mce);
 	if (ret == NOTIFY_STOP)
diff --git a/include/trace/events/mce.h b/include/trace/events/mce.h
index 4c1740ac7889..517536de2458 100644
--- a/include/trace/events/mce.h
+++ b/include/trace/events/mce.h
@@ -10,11 +10,12 @@
 
 TRACE_EVENT(mce_record,
 
-	TP_PROTO(struct mce *m),
+	TP_PROTO(const char *msg, struct mce *m),
 
-	TP_ARGS(m),
+	TP_ARGS(msg, m),
 
 	TP_STRUCT__entry(
+		__string(	msg,		msg		)
 		__field(	u64,		mcgcap		)
 		__field(	u64,		mcgstatus	)
 		__field(	u64,		status		)
@@ -24,14 +25,13 @@ TRACE_EVENT(mce_record,
 		__field(	u64,		tsc		)
 		__field(	u64,		walltime	)
 		__field(	u32,		cpu		)
-		__field(	u32,		cpuid		)
 		__field(	u16,		socketid	)
 		__field(	u8,		cs		)
 		__field(	u8,		bank		)
-		__field(	u8,		cpuvendor	)
 	),
 
 	TP_fast_assign(
+		__assign_str(msg,	msg);
 		__entry->mcgcap		= m->mcgcap;
 		__entry->mcgstatus	= m->mcgstatus;
 		__entry->status		= m->status;
@@ -41,21 +41,19 @@ TRACE_EVENT(mce_record,
 		__entry->tsc		= m->tsc;
 		__entry->walltime	= m->time;
 		__entry->cpu		= m->cpu;
-		__entry->cpuid		= m->cpuid;
 		__entry->socketid	= m->socketid;
 		__entry->cs		= m->cs;
 		__entry->bank		= m->bank;
-		__entry->cpuvendor	= m->cpuvendor;
 	),
 
-	TP_printk("CPU: %d, MCGc/s: %llx/%llx, MC%d: %016Lx, ADDR/MISC: %016Lx/%016Lx, RIP: %02x:<%016Lx>, TSC: %llx, PROCESSOR: %u:%x, TIME: %llu, SOCKET: %u",
+	TP_printk("%s" HW_ERR "CPU: %d, MCGc/s: %llx/%llx, MC%d: %016Lx, ADDR/MISC: %016Lx/%016Lx, RIP: %02x:<%016Lx>, TSC: %llx, TIME: %llu, SOCKET: %u",
+		__get_str(msg),
 		__entry->cpu,
 		__entry->mcgcap, __entry->mcgstatus,
 		__entry->bank, __entry->status,
 		__entry->addr, __entry->misc,
 		__entry->cs, __entry->ip,
 		__entry->tsc,
-		__entry->cpuvendor, __entry->cpuid,
 		__entry->walltime,
 		__entry->socketid)
 );
-- 
1.7.8.rc0

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/