From: Björn Töpel <bj...@rivosinc.com> Hi!
*Patch history* v1: https://lore.kernel.org/kexec/20250409201428.648717-1-bj...@kernel.org/ v2: Added Github Actions support for riscv64 (Simon) Sorted filenames in Makefile (Simon) Added missing dist files (Simon) Fixed mips build (Simon) Here's a passed CI run with this series on master: https://github.com/bjoto/kexec-tools/actions/runs/14597988952/job/40948715214 *Cover* This is an attempt to finally get the RISC-V patches for kexec-tools upstream. Simon suggested in [1] that: > In my mind the big question is how to move RISC-V support from that > branch, to being merged into main. > > IIRC there were some issues that needed to be addressed. Perhaps they > are all addressed by this series, and with some appropriate squashing > we can move forwards with a series based on main? I talked to Nick last week, and he suggested that we'd work the RISC-V collab Github [2], but I think it's just easier to do it on the list. I've been collecting a number of different trees out there, and tried to group them in a series. Given that there is not support for RISC-V upstream yet, I didn't see the need to carry all the fixes/updates ("development history") as separate commits -- it doesn't help bugtracking/bisectability. Instead the first commit message is a big one, and tries to give attribution to all involved parties. Input/thoughts are very much welcome! To properly test this on RISC-V, the upstream Linux kernel has most things in 6.15-rc1, e.g.: commit 28093cfef5dd ("riscv/kexec_file: Handle R_RISCV_64 in purgatory relocator") commit 3f7023171df4 ("riscv/purgatory: 4B align purgatory_start") To cross-build kexec-tools: | ./bootstrap | ./configure --host=riscv64-linux-gnu | make For some tests, additional kernel patches are needed, that as of today is not in 6.15-rc1: * To test "kexec -s -l Image", kexec_file_load with Image support is needed [3] * To test "kexec -c -l vmlinux" with CONFIG_RELOCATABLE, a kbuild fix is needed [4] * Typically if you load initrd, or a large kernel [5] (since a bunch of Reserved regions are not properly exposed). I've tested combinations with crashkernel (-p), and regular (-c/-s + -e) for: * ACPI/UEFI * DT/UEFI * DT * w/ initrd * w/o initrd * ELF (userland loader + kexec_load, and kexec_file_load) * Image (userland loader + kexec_load, and kexec_file_load) I'm sure there are combinations I've missed, but at least from my POV we're in a pretty good shape. All authors: Please let me know if you prefer another split of the patches. Or something else for that matter! ;-) Let's get the ball rolling! Björn [1] https://lore.kernel.org/kexec/20230920115634.gg224...@kernel.org/ [2] https://github.com/riscv-collab/kexec-tools.git [3] https://lore.kernel.org/linux-riscv/20250409193004.643839-1-bj...@kernel.org/ [4] https://lore.kernel.org/linux-riscv/20250408072851.90275-1-alexgh...@rivosinc.com/ [5] https://lore.kernel.org/linux-riscv/20250409182129.634415-1-bj...@kernel.org/ Li Zhengyu (1): RISC-V: Enable kexec_file_load syscall Nick Kossifidis (1): RISC-V: Add support for riscv kexec/kdump on kexec-tools Song Shuai (2): RISC-V: Separate elf_riscv_find_pbase out RISC-V: Support loading Image binary file .github/workflows/build.yml | 1 + configure.ac | 3 + include/elf.h | 1 + kexec/Makefile | 1 + kexec/arch/mips/Makefile | 2 + kexec/arch/riscv/Makefile | 38 ++ kexec/arch/riscv/crashdump-riscv.c | 140 +++++++ kexec/arch/riscv/image-header.h | 88 ++++ kexec/arch/riscv/include/arch/options.h | 43 ++ kexec/arch/riscv/iomem.h | 10 + kexec/arch/riscv/kexec-elf-riscv.c | 184 +++++++++ kexec/arch/riscv/kexec-image-riscv.c | 95 +++++ kexec/arch/riscv/kexec-riscv.c | 526 ++++++++++++++++++++++++ kexec/arch/riscv/kexec-riscv.h | 53 +++ kexec/dt-ops.c | 442 +++++++++++++++++++- kexec/dt-ops.h | 7 + kexec/kexec-syscall.h | 7 + purgatory/Makefile | 1 + purgatory/arch/riscv/Makefile | 7 + 19 files changed, 1648 insertions(+), 1 deletion(-) create mode 100644 kexec/arch/riscv/Makefile create mode 100644 kexec/arch/riscv/crashdump-riscv.c create mode 100644 kexec/arch/riscv/image-header.h create mode 100644 kexec/arch/riscv/include/arch/options.h create mode 100644 kexec/arch/riscv/iomem.h create mode 100644 kexec/arch/riscv/kexec-elf-riscv.c create mode 100644 kexec/arch/riscv/kexec-image-riscv.c create mode 100644 kexec/arch/riscv/kexec-riscv.c create mode 100644 kexec/arch/riscv/kexec-riscv.h create mode 100644 purgatory/arch/riscv/Makefile base-commit: 14f48ea80e510e5af79ca6c46fa28e99a3695d1c -- 2.48.1
