| Message ID | 20160907043203.6309-1-takahiro.akashi@linaro.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Wed, Sep 07, 2016 at 01:32:03PM +0900, AKASHI Takahiro wrote: > From: James Morse <james.morse@arm.com> > > 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@arm.com> > [takahiro.akashi@linaro.org: added "linux,crashkernel-base" and "-size" ] > Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> > --- > Documentation/devicetree/bindings/chosen.txt | 30 ++++++++++++++++++++++++++++ > 1 file changed, 30 insertions(+) Acked-by: Rob Herring <robh@kernel.org>
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>; + }; +};