* [PATCH v26 7/7] Documentation: dt: chosen properties for arm64 kdump
[not found] ` <20160907042908.6232-1-takahiro.akashi-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
@ 2016-09-07 4:32 ` AKASHI Takahiro
[not found] ` <20160907043203.6309-1-takahiro.akashi-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
0 siblings, 1 reply; 2+ messages in thread
From: AKASHI Takahiro @ 2016-09-07 4:32 UTC (permalink / raw)
To: catalin.marinas-5wv7dgnIgG8, will.deacon-5wv7dgnIgG8,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A,
frowand.list-Re5JQEeQqe8AvxtiuMwx3w
Cc: james.morse-5wv7dgnIgG8, geoff-wEGCiKHe2LqWVfeAwA7xHQ,
bauerman-23VcF4HTsmIX0ybBhKVfKdBPR1lH4CV8,
dyoung-H+wXaHxf7aLQT0dZR+AlfA, mark.rutland-5wv7dgnIgG8,
kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r,
devicetree-u79uwXL29TY76Z2rM5mHXA, AKASHI Takahiro
From: James Morse <james.morse-5wv7dgnIgG8@public.gmane.org>
Add documentation for
linux,crashkernel-base and crashkernel-size,
linux,elfcorehdr
used by arm64 kexec/kdump to decribe the kdump reserved area, and
the elfcorehdr's location within it.
Signed-off-by: James Morse <james.morse-5wv7dgnIgG8@public.gmane.org>
[takahiro.akashi-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org: added "linux,crashkernel-base" and "-size" ]
Signed-off-by: AKASHI Takahiro <takahiro.akashi-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
---
Documentation/devicetree/bindings/chosen.txt | 30 ++++++++++++++++++++++++++++
1 file changed, 30 insertions(+)
diff --git a/Documentation/devicetree/bindings/chosen.txt b/Documentation/devicetree/bindings/chosen.txt
index 6ae9d82..6257ee7 100644
--- a/Documentation/devicetree/bindings/chosen.txt
+++ b/Documentation/devicetree/bindings/chosen.txt
@@ -52,3 +52,33 @@ This property is set (currently only on PowerPC, and only needed on
book3e) by some versions of kexec-tools to tell the new kernel that it
is being booted by kexec, as the booting environment may differ (e.g.
a different secondary CPU release mechanism)
+
+linux,crashkernel-base
+linux,crashkernel-size
+----------------------
+
+These properties (currently used on PowerPC and arm64) indicates
+the base address and the size, respectively, of the reserved memory
+range for crash dump kernel.
+e.g.
+
+/ {
+ chosen {
+ linux,crashkernel-base = <0x9 0xf0000000>;
+ linux,crashkernel-size = <0x0 0x10000000>;
+ };
+};
+
+linux,elfcorehdr
+----------------
+
+This property (currently used only on arm64) holds the memory range,
+the address and the size, of the elf core header which mainly describes
+the panicked kernel's memory layout as PT_LOAD segments of elf format.
+e.g.
+
+/ {
+ chosen {
+ linux,elfcorehdr = <0x9 0xfffff000 0x0 0x800>;
+ };
+};
--
2.9.0
--
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