From: takahiro.akashi@linaro.org (AKASHI Takahiro) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v22 8/8] Documentation: dt: chosen properties for arm64 kdump Date: Tue, 12 Jul 2016 14:05:14 +0900 [thread overview] Message-ID: <20160712050514.22307-9-takahiro.akashi@linaro.org> (raw) In-Reply-To: <20160712050514.22307-1-takahiro.akashi@linaro.org> From: James Morse <james.morse@arm.com> Add documentation for linux,crashkernel-base and crashkernel-size, linux,usable-memory-range, and 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 at linaro.org: renamed "usable-memory" to "usable-memory-range", added "linux,crashkernel-base" and "-size" ] Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> --- Documentation/devicetree/bindings/chosen.txt | 45 ++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/Documentation/devicetree/bindings/chosen.txt b/Documentation/devicetree/bindings/chosen.txt index 6ae9d82..d7a3a86 100644 --- a/Documentation/devicetree/bindings/chosen.txt +++ b/Documentation/devicetree/bindings/chosen.txt @@ -52,3 +52,48 @@ 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 are set (on PowerPC and arm64) during kdump to tell +use-space tools, like kexec-tools, the base address of the crash-dump +kernel's reserved area of memory and the size. e.g. + +/ { + chosen { + linux,crashkernel-base = <0x9 0xf0000000>; + linux,crashkernel-size = <0x0 0x10000000>; + }; +}; + +linux,usable-memory-range +------------------------- + +This property is set (currently only on arm64) during kdump to tell +the crash-dump kernel the base address of its reserved area of memory, +and the size. e.g. + +/ { + chosen { + linux,usable-memory-range = <0x9 0xf0000000 0x0 0x10000000>; + }; +}; + +Please note that, if this property is present, any memory regions under +"memory" nodes will be ignored. + +linux,elfcorehdr +---------------- + +This property is set (currently only on arm64) during kdump to tell +the crash-dump kernel the address and size of the elfcorehdr that describes +the old kernel's memory as an elf file. This memory must reside within +the area described by 'linux,usable-memory-range'. e.g. + +/ { + chosen { + linux,usable-memory = <0x9 0xf0000000 0x0 0x10000000>; + linux,elfcorehdr = <0x9 0xfffff000 0x0 0x800>; + }; +}; -- 2.9.0
WARNING: multiple messages have this Message-ID (diff)
From: AKASHI Takahiro <takahiro.akashi@linaro.org> To: catalin.marinas@arm.com, will.deacon@arm.com Cc: mark.rutland@arm.com, geoff@infradead.org, kexec@lists.infradead.org, AKASHI Takahiro <takahiro.akashi@linaro.org>, robh+dt@kernel.org, james.morse@arm.com, bauerman@linux.vnet.ibm.com, dyoung@redhat.com, linux-arm-kernel@lists.infradead.org Subject: [PATCH v22 8/8] Documentation: dt: chosen properties for arm64 kdump Date: Tue, 12 Jul 2016 14:05:14 +0900 [thread overview] Message-ID: <20160712050514.22307-9-takahiro.akashi@linaro.org> (raw) In-Reply-To: <20160712050514.22307-1-takahiro.akashi@linaro.org> From: James Morse <james.morse@arm.com> Add documentation for linux,crashkernel-base and crashkernel-size, linux,usable-memory-range, and 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: renamed "usable-memory" to "usable-memory-range", added "linux,crashkernel-base" and "-size" ] Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> --- Documentation/devicetree/bindings/chosen.txt | 45 ++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) diff --git a/Documentation/devicetree/bindings/chosen.txt b/Documentation/devicetree/bindings/chosen.txt index 6ae9d82..d7a3a86 100644 --- a/Documentation/devicetree/bindings/chosen.txt +++ b/Documentation/devicetree/bindings/chosen.txt @@ -52,3 +52,48 @@ 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 are set (on PowerPC and arm64) during kdump to tell +use-space tools, like kexec-tools, the base address of the crash-dump +kernel's reserved area of memory and the size. e.g. + +/ { + chosen { + linux,crashkernel-base = <0x9 0xf0000000>; + linux,crashkernel-size = <0x0 0x10000000>; + }; +}; + +linux,usable-memory-range +------------------------- + +This property is set (currently only on arm64) during kdump to tell +the crash-dump kernel the base address of its reserved area of memory, +and the size. e.g. + +/ { + chosen { + linux,usable-memory-range = <0x9 0xf0000000 0x0 0x10000000>; + }; +}; + +Please note that, if this property is present, any memory regions under +"memory" nodes will be ignored. + +linux,elfcorehdr +---------------- + +This property is set (currently only on arm64) during kdump to tell +the crash-dump kernel the address and size of the elfcorehdr that describes +the old kernel's memory as an elf file. This memory must reside within +the area described by 'linux,usable-memory-range'. e.g. + +/ { + chosen { + linux,usable-memory = <0x9 0xf0000000 0x0 0x10000000>; + linux,elfcorehdr = <0x9 0xfffff000 0x0 0x800>; + }; +}; -- 2.9.0 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec
next prev parent reply other threads:[~2016-07-12 5:05 UTC|newest] Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top 2016-07-12 5:05 [PATCH v22 0/8] arm64: add kdump support AKASHI Takahiro 2016-07-12 5:05 ` AKASHI Takahiro 2016-07-12 5:05 ` [PATCH v22 1/8] arm64: kdump: reserve memory for crash dump kernel AKASHI Takahiro 2016-07-12 5:05 ` AKASHI Takahiro 2016-07-13 9:12 ` Suzuki K Poulose 2016-07-13 9:12 ` Suzuki K Poulose 2016-07-13 15:42 ` AKASHI Takahiro 2016-07-13 15:42 ` AKASHI Takahiro 2016-07-19 9:39 ` Dennis Chen 2016-07-19 9:39 ` Dennis Chen 2016-07-19 10:28 ` AKASHI Takahiro 2016-07-19 10:28 ` AKASHI Takahiro 2016-07-19 10:41 ` Dennis Chen 2016-07-19 10:41 ` Dennis Chen 2016-07-19 12:48 ` Mark Salter 2016-07-19 12:48 ` Mark Salter 2016-07-19 13:27 ` Mark Rutland 2016-07-19 13:27 ` Mark Rutland 2016-07-20 2:17 ` AKASHI Takahiro 2016-07-20 2:17 ` AKASHI Takahiro 2016-07-20 3:48 ` Dennis Chen 2016-07-20 3:48 ` Dennis Chen 2016-07-19 23:34 ` AKASHI Takahiro 2016-07-19 23:34 ` AKASHI Takahiro 2016-07-12 5:05 ` [PATCH v22 2/8] arm64: limit memory regions based on DT property, usable-memory-range AKASHI Takahiro 2016-07-12 5:05 ` AKASHI Takahiro 2016-07-18 18:04 ` James Morse 2016-07-18 18:04 ` James Morse 2016-07-19 8:35 ` AKASHI Takahiro 2016-07-19 8:35 ` AKASHI Takahiro 2016-07-19 10:06 ` Dennis Chen 2016-07-19 10:06 ` Dennis Chen 2016-07-19 11:01 ` AKASHI Takahiro 2016-07-19 11:01 ` AKASHI Takahiro 2016-07-20 3:39 ` Dennis Chen 2016-07-20 3:39 ` Dennis Chen 2016-07-20 4:22 ` AKASHI Takahiro 2016-07-20 4:22 ` AKASHI Takahiro 2016-07-20 4:36 ` Dennis Chen 2016-07-20 4:36 ` Dennis Chen 2016-07-21 0:57 ` AKASHI Takahiro 2016-07-21 0:57 ` AKASHI Takahiro 2016-07-22 13:55 ` James Morse 2016-07-22 13:55 ` James Morse 2016-07-25 5:27 ` AKASHI Takahiro 2016-07-25 5:27 ` AKASHI Takahiro 2016-08-04 6:21 ` AKASHI Takahiro 2016-08-04 6:21 ` AKASHI Takahiro 2016-08-09 16:22 ` James Morse 2016-08-09 16:22 ` James Morse 2016-07-12 5:05 ` [PATCH v22 3/8] arm64: kdump: implement machine_crash_shutdown() AKASHI Takahiro 2016-07-12 5:05 ` AKASHI Takahiro 2016-07-13 9:32 ` Suzuki K Poulose 2016-07-13 9:32 ` Suzuki K Poulose 2016-07-13 16:00 ` AKASHI Takahiro 2016-07-13 16:00 ` AKASHI Takahiro 2016-07-12 5:05 ` [PATCH v22 4/8] arm64: kdump: add kdump support AKASHI Takahiro 2016-07-12 5:05 ` AKASHI Takahiro 2016-07-12 5:05 ` [PATCH v22 5/8] arm64: kdump: add VMCOREINFO's for user-space coredump tools AKASHI Takahiro 2016-07-12 5:05 ` AKASHI Takahiro 2016-07-12 5:05 ` [PATCH v22 6/8] arm64: kdump: enable kdump in the arm64 defconfig AKASHI Takahiro 2016-07-12 5:05 ` AKASHI Takahiro 2016-07-12 5:05 ` [PATCH v22 7/8] arm64: kdump: update a kernel doc AKASHI Takahiro 2016-07-12 5:05 ` AKASHI Takahiro 2016-07-12 5:05 ` AKASHI Takahiro [this message] 2016-07-12 5:05 ` [PATCH v22 8/8] Documentation: dt: chosen properties for arm64 kdump AKASHI Takahiro 2016-07-12 10:07 ` Mark Rutland 2016-07-12 10:07 ` Mark Rutland 2016-07-13 15:14 ` AKASHI Takahiro 2016-07-13 15:14 ` AKASHI Takahiro
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