From mboxrd@z Thu Jan 1 00:00:00 1970 From: takahiro.akashi@linaro.org (AKASHI Takahiro) Date: Wed, 7 Sep 2016 13:29:02 +0900 Subject: [PATCH v26 0/7] arm64: add kdump support Message-ID: <20160907042908.6232-1-takahiro.akashi@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org v26-specific note: After a comment from Rob[0], an idea of adding "linux,usable-memory-range" was dropped. Instead, an existing "reserved-memory" node will be used to limit usable memory ranges on crash dump kernel. This works not only on UEFI/ACPI systems but also on DT-only systems, but if he really insists on using DT-specific "usable-memory" property, I will post additional patches for kexec-tools. Those would be redundant, though. Even in that case, the kernel will not have to be changed. This patch series adds kdump support on arm64. There are some prerequisite patches [1],[2]. To load a crash-dump kernel to the systems, a series of patches to kexec-tools, which have not yet been merged upstream, are needed. Please always use my latest kdump patches, v3 [3]. To examine vmcore (/proc/vmcore) on a crash-dump kernel, you can use - crash utility (coming v7.1.6 or later) [4] (Necessary patches have already been queued in the master.) [0] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/452582.html [1] "arm64: mark reserved memblock regions explicitly in iomem" http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/450433.html [2] "efi: arm64: treat regions with WT/WC set but WB cleared as memory" http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/451491.html [3] T.B.D. [4] https://github.com/crash-utility/crash.git 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): arm64: kdump: reserve memory for crash dump kernel memblock: add memblock_cap_memory_range() arm64: limit memory regions based on DT property, usable-memory-range arm64: kdump: implement machine_crash_shutdown() arm64: kdump: add kdump support arm64: kdump: add VMCOREINFO's for user-space coredump tools arm64: kdump: enable kdump in the arm64 defconfig arm64: kdump: update a kernel doc James Morse (1): Documentation: dt: chosen properties for arm64 kdump 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 | 41 +++++- 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 | 202 +++++++++++++++++++++++++++ include/linux/memblock.h | 1 + mm/memblock.c | 28 ++++ 15 files changed, 551 insertions(+), 7 deletions(-) create mode 100644 arch/arm64/kernel/crash_dump.c -- 2.9.0 AKASHI Takahiro (6): arm64: kdump: reserve memory for crash dump kernel arm64: kdump: implement machine_crash_shutdown() arm64: kdump: add kdump support arm64: kdump: add VMCOREINFO's for user-space coredump tools arm64: kdump: enable kdump in the arm64 defconfig arm64: kdump: update a kernel doc James Morse (1): Documentation: dt: chosen properties for arm64 kdump Documentation/devicetree/bindings/chosen.txt | 30 +++++ 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 | 41 ++++++- 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 | 167 +++++++++++++++++++++++++++ 13 files changed, 472 insertions(+), 7 deletions(-) create mode 100644 arch/arm64/kernel/crash_dump.c -- 2.9.0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from mail-pa0-x233.google.com ([2607:f8b0:400e:c03::233]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bhUOQ-0000zl-SE for kexec@lists.infradead.org; Wed, 07 Sep 2016 04:23:25 +0000 Received: by mail-pa0-x233.google.com with SMTP id cm16so1969049pac.0 for ; Tue, 06 Sep 2016 21:23:01 -0700 (PDT) From: AKASHI Takahiro Subject: [PATCH v26 0/7] arm64: add kdump support Date: Wed, 7 Sep 2016 13:29:02 +0900 Message-Id: <20160907042908.6232-1-takahiro.akashi@linaro.org> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: catalin.marinas@arm.com, will.deacon@arm.com Cc: mark.rutland@arm.com, geoff@infradead.org, kexec@lists.infradead.org, AKASHI Takahiro , james.morse@arm.com, bauerman@linux.vnet.ibm.com, dyoung@redhat.com, linux-arm-kernel@lists.infradead.org v26-specific note: After a comment from Rob[0], an idea of adding "linux,usable-memory-range" was dropped. Instead, an existing "reserved-memory" node will be used to limit usable memory ranges on crash dump kernel. This works not only on UEFI/ACPI systems but also on DT-only systems, but if he really insists on using DT-specific "usable-memory" property, I will post additional patches for kexec-tools. Those would be redundant, though. Even in that case, the kernel will not have to be changed. This patch series adds kdump support on arm64. There are some prerequisite patches [1],[2]. To load a crash-dump kernel to the systems, a series of patches to kexec-tools, which have not yet been merged upstream, are needed. Please always use my latest kdump patches, v3 [3]. To examine vmcore (/proc/vmcore) on a crash-dump kernel, you can use - crash utility (coming v7.1.6 or later) [4] (Necessary patches have already been queued in the master.) [0] http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/452582.html [1] "arm64: mark reserved memblock regions explicitly in iomem" http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/450433.html [2] "efi: arm64: treat regions with WT/WC set but WB cleared as memory" http://lists.infradead.org/pipermail/linux-arm-kernel/2016-August/451491.html [3] T.B.D. [4] https://github.com/crash-utility/crash.git 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): arm64: kdump: reserve memory for crash dump kernel memblock: add memblock_cap_memory_range() arm64: limit memory regions based on DT property, usable-memory-range arm64: kdump: implement machine_crash_shutdown() arm64: kdump: add kdump support arm64: kdump: add VMCOREINFO's for user-space coredump tools arm64: kdump: enable kdump in the arm64 defconfig arm64: kdump: update a kernel doc James Morse (1): Documentation: dt: chosen properties for arm64 kdump 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 | 41 +++++- 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 | 202 +++++++++++++++++++++++++++ include/linux/memblock.h | 1 + mm/memblock.c | 28 ++++ 15 files changed, 551 insertions(+), 7 deletions(-) create mode 100644 arch/arm64/kernel/crash_dump.c -- 2.9.0 AKASHI Takahiro (6): arm64: kdump: reserve memory for crash dump kernel arm64: kdump: implement machine_crash_shutdown() arm64: kdump: add kdump support arm64: kdump: add VMCOREINFO's for user-space coredump tools arm64: kdump: enable kdump in the arm64 defconfig arm64: kdump: update a kernel doc James Morse (1): Documentation: dt: chosen properties for arm64 kdump Documentation/devicetree/bindings/chosen.txt | 30 +++++ 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 | 41 ++++++- 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 | 167 +++++++++++++++++++++++++++ 13 files changed, 472 insertions(+), 7 deletions(-) create mode 100644 arch/arm64/kernel/crash_dump.c -- 2.9.0 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec