For easier testing, I pushed my patches to: https://git.linaro.org/people/takahiro.akashi/linux-aarch64.git arm64/kdump https://git.linaro.org/people/takahiro.akashi/kexec-tools.git arm64/kdump If anybody tries my patches, please let me know the result. (Pratyush, thank you for your test.) Thanks, -Takahiro AKASHI On Wed, Nov 02, 2016 at 01:49:59PM +0900, AKASHI Takahiro wrote: > v27-specific note: In this version, the change made in v26 was reverted > because I've got a comment that /reserved-memory DT property should > not be used on UEFI/ACPI systems, even though it is workable under > the current implementation. I've also confirmed that Rob doesn't argue > any more against using "linux,usable-memory-range". > So v27 is essentially the same as v25. > > This patch series adds kdump support on arm64. > > To load a crash-dump kernel to the systems, a series of patches to > kexec-tools[1] are also needed. Please use the latest one, v4 [2]. > > To examine vmcore (/proc/vmcore) on a crash-dump kernel, you can use > - crash utility (v7.1.6 or later) [3] > > > [1] https://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git > [1] http://lists.infradead.org/pipermail/kexec/2016-November/017555.html > [2] https://github.com/crash-utility/crash.git > > Changes for v27 (Nov 2, 2016) > o rebased to Linux-v4.9-rc3 > o revert v26 change, i.e. revive "linux,usable-memory-range" property > (patch #2/#3, updating patch #9) > o minor fixes per review comments (patch #3/#4/#6/#8) > o re-order patches and improve commit messages for readability > > Changes for v26 (Sep 7, 2016): > o Use /reserved-memory instead of "linux,usable-memory-range" property > (dropping v25's patch#2 and #3, updating ex-patch#9.) > > Changes for v25 (Aug 29, 2016): > o Rebase to Linux-4.8-rc4 > o Use memremap() instead of ioremap_cache() [patch#5] > > Changes for v24 (Aug 9, 2016): > o Rebase to Linux-4.8-rc1 > o Update descriptions about newly added DT proerties > > Changes for v23 (July 26, 2016): > > o Move memblock_reserve() to a single place in reserve_crashkernel() > o Use cpu_park_loop() in ipi_cpu_crash_stop() > o Always enforce ARCH_LOW_ADDRESS_LIMIT to the memory range of crash kernel > o Re-implement fdt_enforce_memory_region() to remove non-reserve regions > (for ACPI) from usable memory at crash kernel > > Changes for v22 (July 12, 2016): > > o Export "crashkernel-base" and "crashkernel-size" via device-tree, > and add some descriptions about them in chosen.txt > o Rename "usable-memory" to "usable-memory-range" to avoid inconsistency > with powerpc's "usable-memory" > o Make cosmetic changes regarding "ifdef" usage > o Correct some wordings in kdump.txt > > Changes for v21 (July 6, 2016): > > o Remove kexec patches. > o Rebase to arm64's for-next/core (Linux-4.7-rc4 based). > o Clarify the description about kvm in kdump.txt. > > See the following link [3] for older changes: > [3] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-June/438780.html > > AKASHI Takahiro (8): > memblock: add memblock_cap_memory_range() > arm64: limit memory regions based on DT property, usable-memory-range > arm64: kdump: reserve memory for crash dump kernel > arm64: kdump: implement machine_crash_shutdown() > arm64: kdump: add VMCOREINFO's for user-space tools > arm64: kdump: provide /proc/vmcore file > arm64: kdump: enable kdump in defconfig > Documentation: kdump: describe arm64 port > > James Morse (1): > Documentation: dt: chosen properties for arm64 kdump > > Documentation/devicetree/bindings/chosen.txt | 50 +++++++ > Documentation/kdump/kdump.txt | 16 ++- > arch/arm64/Kconfig | 11 ++ > arch/arm64/configs/defconfig | 1 + > arch/arm64/include/asm/hardirq.h | 2 +- > arch/arm64/include/asm/kexec.h | 42 +++++- > arch/arm64/include/asm/smp.h | 2 + > arch/arm64/kernel/Makefile | 1 + > arch/arm64/kernel/crash_dump.c | 71 ++++++++++ > arch/arm64/kernel/machine_kexec.c | 67 ++++++++- > arch/arm64/kernel/setup.c | 7 +- > arch/arm64/kernel/smp.c | 63 +++++++++ > arch/arm64/mm/init.c | 199 +++++++++++++++++++++++++++ > include/linux/memblock.h | 1 + > mm/memblock.c | 28 ++++ > 15 files changed, 554 insertions(+), 7 deletions(-) > create mode 100644 arch/arm64/kernel/crash_dump.c > > -- > 2.10.0 >
