From mboxrd@z Thu Jan 1 00:00:00 1970 From: takahiro.akashi@linaro.org (AKASHI Takahiro) Date: Mon, 3 Apr 2017 11:21:39 +0900 Subject: [PATCH v35 00/14] arm64: add kdump support Message-ID: <20170403022139.12383-1-takahiro.akashi@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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, v6 [2]. For your convinience, you can pick them up from: https://git.linaro.org/people/takahiro.akashi/linux-aarch64.git arm64/kdump https://git.linaro.org/people/takahiro.akashi/kexec-tools.git arm64/kdump To examine vmcore (/proc/vmcore) on a crash-dump kernel, you can use - crash utility (v7.1.8 or later) [3] I tested this patchset on fast model and hikey. The previous versions were also: Tested-by: Pratyush Anand (v33, mustang and seattle) Tested-by: James Morse (v27/v32?, Juno) Tested-by: Sameer Goel (v33, QDT2400) Changes for v35 (Apr 3, 2017) o rebased to arm64/for-next/core, solving conflicts on mmu.c (patch#6) Changes for v34 (Mar 28, 2017) o add and use set_memory_valid() instead of create_pgd_mapping() (patch #5,6) o rename functions from kexec_* to crash_* (patch #7) o supress WARN_ON() message if successfully shutting down secondary cpus (patch #8) Changes for v33 (Mar 15, 2017) o rebased to v4.11-rc2+ o arch_kexec_(un)protect_crashkres() now protects loaded data segments only along with moving copying of control_code_page back to machine_kexec() (patch #6) o reduce the size of hibernation image when kdump and hibernation are comfigured at the same time (patch #7) o clearify that "linux,usable-memory-range" and "linux,elfcorehdr" have values of the size of root node's "#address-cells" and "#size-cells" (patch #13) o add "efi/libstub/arm*: Set default address and size cells values for an empty dtb" from Sameer Goel (patch #14) (I didn't test the case though.) Changes for v32 (Feb 7, 2017) o isolate crash dump kernel memory as well as kernel text/data by using MEMBLOCK_MAP attribute to and then specifically map them in map_mem() (patch #1,6) o delete remove_pgd_mapping() and instead modify create_pgd_mapping() to allowing for unmapping a kernel mapping (patch #5) o correct a commit message as well as a comment in the source (patch#10) o other trivial changes after Mark's comments (patch#3,4) Changes for v31 (Feb 1, 2017) o add/use remove_pgd_mapping() instead of modifying (__)create_pgd_mapping() to protect crash dump kernel memory (patch #4,5) o fix an issue at the isolation of crash dump kernel memory in map_mem()/__map_memblock(), adding map_crashkernel() (patch#5) o preserve the contents of crash dump kernel memory around hibernation (patch#6) Changes for v30 (Jan 24, 2017) o rebased to Linux-v4.10-rc5 o remove "linux,crashkernel-base/size" from exported device tree o protect memory region for crash-dump kernel (adding patch#4,5) o remove "in_crash_kexec" variable o and other trivial changes Changes for v29 (Dec 28, 2016) o rebased to Linux-v4.10-rc1 o change asm constraints in crash_setup_regs() per Catalin Changes for v28 (Nov 22, 2016) o rebased to Linux-v4.9-rc6 o revamp patch #1 and merge memblock_cap_memory_range() with memblock_mem_limit_remove_map() Changes for v27 (Nov 1, 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 link [4] for older changes. [1] https://git.kernel.org/pub/scm/utils/kernel/kexec/kexec-tools.git [2] http://lists.infradead.org/pipermail/kexec/2017-March/018356.html [3] https://github.com/crash-utility/crash.git [4] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-June/438780.html AKASHI Takahiro (11): memblock: add memblock_clear_nomap() 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: mm: add set_memory_valid() arm64: hibernate: preserve kdump image around hibernation 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 Sameer Goel (1): efi/libstub/arm*: Set default address and size cells values for an empty dtb Takahiro Akashi (1): arm64: kdump: protect crash dump kernel memory Documentation/devicetree/bindings/chosen.txt | 45 +++++++ Documentation/kdump/kdump.txt | 16 ++- arch/arm64/Kconfig | 11 ++ arch/arm64/configs/defconfig | 1 + arch/arm64/include/asm/cacheflush.h | 1 + arch/arm64/include/asm/hardirq.h | 2 +- arch/arm64/include/asm/kexec.h | 52 +++++++- arch/arm64/include/asm/smp.h | 3 + arch/arm64/kernel/Makefile | 1 + arch/arm64/kernel/crash_dump.c | 71 +++++++++++ arch/arm64/kernel/hibernate.c | 10 +- arch/arm64/kernel/machine_kexec.c | 170 +++++++++++++++++++++++-- arch/arm64/kernel/setup.c | 7 +- arch/arm64/kernel/smp.c | 68 ++++++++++ arch/arm64/mm/init.c | 181 +++++++++++++++++++++++++++ arch/arm64/mm/mmu.c | 103 +++++++-------- arch/arm64/mm/pageattr.c | 15 ++- drivers/firmware/efi/libstub/fdt.c | 28 ++++- include/linux/memblock.h | 2 + mm/memblock.c | 56 ++++++--- 20 files changed, 757 insertions(+), 86 deletions(-) create mode 100644 arch/arm64/kernel/crash_dump.c -- 2.11.1