[PATCH v33 00/14] add kdump support
AKASHI Takahiro
takahiro.akashi at linaro.org
Wed Mar 15 02:56:56 PDT 2017
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 <panand at redhat.com> (v32, mustang and seattle)
Tested-by: James Morse <james.morse at arm.com> (v27/v32?, Juno)
Tested-by: Sameer Goel (v32, QDT2400)
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 (12):
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: allow for unmapping part of kernel mapping
arm64: kdump: protect crash dump kernel memory
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
Documentation/devicetree/bindings/chosen.txt | 45 +++++++
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 | 52 +++++++-
arch/arm64/include/asm/pgtable-prot.h | 1 +
arch/arm64/include/asm/smp.h | 2 +
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 | 63 ++++++++++
arch/arm64/mm/init.c | 181 +++++++++++++++++++++++++++
arch/arm64/mm/mmu.c | 107 ++++++++--------
drivers/firmware/efi/libstub/fdt.c | 28 ++++-
include/linux/memblock.h | 2 +
mm/memblock.c | 56 ++++++---
19 files changed, 745 insertions(+), 81 deletions(-)
create mode 100644 arch/arm64/kernel/crash_dump.c
--
2.11.1
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