This patch series to support kexec/kdump (only 64bit). Kexec is a system call that enables you to load and boot into another kernel from the currently running kernel. This is useful for kernel developers or other people who need to reboot very quickly without waiting for the whole BIOS boot process to finish. Kdump uses kexec to quickly boot to a dump-capture kernel whenever a dump of the system kernel's memory needs to be taken (for example, when the system panics). The system kernel's memory image is preserved across the reboot and is accessible to the dump-capture kernel. For details, see Documentation/admin-guide/kdump/kdump.rst. User tools kexec-tools see link [1]. TODO: Currently kdump does not support the same binary image, the production kernel and the capture kernel will be generated with different configurations. I will support kernel relocation support in the near future. Then will go to implement the same binary support based on kernel relocation support. [1] Link: https://github.com/tangyouling/kexec-tools Youling Tang (3): LoongArch: Add kexec support LoongArch: Add kdump support LoongArch: Enable CONFIG_KEXEC arch/loongarch/Kconfig | 33 ++++ arch/loongarch/Makefile | 4 + arch/loongarch/configs/loongson3_defconfig | 1 + arch/loongarch/include/asm/kexec.h | 58 +++++++ arch/loongarch/kernel/Makefile | 3 + arch/loongarch/kernel/crash.c | 100 ++++++++++++ arch/loongarch/kernel/crash_dump.c | 19 +++ arch/loongarch/kernel/head.S | 7 +- arch/loongarch/kernel/machine_kexec.c | 176 +++++++++++++++++++++ arch/loongarch/kernel/mem.c | 6 + arch/loongarch/kernel/relocate_kernel.S | 131 +++++++++++++++ arch/loongarch/kernel/setup.c | 49 ++++++ arch/loongarch/kernel/traps.c | 4 + 13 files changed, 590 insertions(+), 1 deletion(-) create mode 100644 arch/loongarch/include/asm/kexec.h create mode 100644 arch/loongarch/kernel/crash.c create mode 100644 arch/loongarch/kernel/crash_dump.c create mode 100644 arch/loongarch/kernel/machine_kexec.c create mode 100644 arch/loongarch/kernel/relocate_kernel.S -- 2.36.0 _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
