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| author | AKASHI Takahiro <takahiro.akashi@linaro.org> | 2017-04-03 05:24:40 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2017-04-05 20:32:32 +0300 |
| commit | 0ceb7d887ed6cf22d84657fa31a1521a7e935473 (patch) | |
| tree | 5b198ca5d01533a7f80b9dab0954e72fe9a15e0a /Documentation | |
| parent | 3f5c1e1e761981b41d0be22f9aadfc7458fcc786 (diff) | |
| download | linux-0ceb7d887ed6cf22d84657fa31a1521a7e935473.tar.xz | |
Documentation: kdump: describe arm64 port
Add arch specific descriptions about kdump usage on arm64 to kdump.txt.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Baoquan He <bhe@redhat.com>
Acked-by: Dave Young <dyoung@redhat.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/kdump/kdump.txt | 16 |
1 files changed, 15 insertions, 1 deletions
diff --git a/Documentation/kdump/kdump.txt b/Documentation/kdump/kdump.txt index b0eb27b956d9..615434d81108 100644 --- a/Documentation/kdump/kdump.txt +++ b/Documentation/kdump/kdump.txt @@ -18,7 +18,7 @@ memory image to a dump file on the local disk, or across the network to a remote system. Kdump and kexec are currently supported on the x86, x86_64, ppc64, ia64, -s390x and arm architectures. +s390x, arm and arm64 architectures. When the system kernel boots, it reserves a small section of memory for the dump-capture kernel. This ensures that ongoing Direct Memory Access @@ -249,6 +249,13 @@ Dump-capture kernel config options (Arch Dependent, arm) AUTO_ZRELADDR=y +Dump-capture kernel config options (Arch Dependent, arm64) +---------------------------------------------------------- + +- Please note that kvm of the dump-capture kernel will not be enabled + on non-VHE systems even if it is configured. This is because the CPU + will not be reset to EL2 on panic. + Extended crashkernel syntax =========================== @@ -305,6 +312,8 @@ Boot into System Kernel kernel will automatically locate the crash kernel image within the first 512MB of RAM if X is not given. + On arm64, use "crashkernel=Y[@X]". Note that the start address of + the kernel, X if explicitly specified, must be aligned to 2MiB (0x200000). Load the Dump-capture Kernel ============================ @@ -327,6 +336,8 @@ For s390x: - Use image or bzImage For arm: - Use zImage +For arm64: + - Use vmlinux or Image If you are using a uncompressed vmlinux image then use following command to load dump-capture kernel. @@ -370,6 +381,9 @@ For s390x: For arm: "1 maxcpus=1 reset_devices" +For arm64: + "1 maxcpus=1 reset_devices" + Notes on loading the dump-capture kernel: * By default, the ELF headers are stored in ELF64 format to support |