linux-kernel - [PATCH v1 3/3] ramoops: add dump_all optional field to ramoops DT node

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Date:   Sat,  2 May 2020 10:35:55 -0400
From:   Pavel Tatashin <pasha.tatashin@...een.com>
To:     pasha.tatashin@...een.com, jmorris@...ei.org, sashal@...nel.org,
        linux-kernel@...r.kernel.org, pmladek@...e.com,
        sergey.senozhatsky@...il.com, rostedt@...dmis.org,
        keescook@...omium.org, anton@...msg.org, ccross@...roid.com,
        tony.luck@...el.com, robh+dt@...nel.org, devicetree@...r.kernel.org
Subject: [PATCH v1 3/3] ramoops: add dump_all optional field to ramoops DT node

Currently, it is possible to dump kmesges for panic, or oops.
With dump_all it is possible to dump messages for kmesg_dump events,
for example reboot, halt, shutdown, kexec.

Signed-off-by: Pavel Tatashin <pasha.tatashin@...een.com>
---
 Documentation/devicetree/bindings/reserved-memory/ramoops.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/reserved-memory/ramoops.txt b/Documentation/devicetree/bindings/reserved-memory/ramoops.txt
index 0eba562fe5c6..3ce424c9ad4c 100644
--- a/Documentation/devicetree/bindings/reserved-memory/ramoops.txt
+++ b/Documentation/devicetree/bindings/reserved-memory/ramoops.txt
@@ -47,5 +47,8 @@ Optional properties:
 
 - no-dump-oops: if present, only dump panics (defaults to panics and oops)
 
+- dump-all: if present, dump kernel messages during all kmesg dump events.
+  Reasons are specified in include/linux/kmsg_dump.h KMSG_DUMP_*
+
 - flags: if present, pass ramoops behavioral flags (defaults to 0,
   see include/linux/pstore_ram.h RAMOOPS_FLAG_* for flag values).
-- 
2.25.1