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| author | Liao Chang <liaochang1@huawei.com> | 2022-04-08 18:09:11 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-05-19 12:14:18 -0700 |
| commit | 6261586e0c91db14c34f894f4bc48f2300cff1d4 (patch) | |
| tree | 0bac89b95a140653c0051982eaf0a9cc4743645c /arch/riscv/kernel/machine_kexec_file.c | |
| parent | b7fb4d78a6ade6026d9e5cf438c2a46ab962e032 (diff) | |
| download | lwn-6261586e0c91db14c34f894f4bc48f2300cff1d4.tar.gz lwn-6261586e0c91db14c34f894f4bc48f2300cff1d4.zip | |
RISC-V: Add kexec_file support
This patch adds support for kexec_file on RISC-V. I tested it on riscv64
QEMU with busybear-linux and single core along with the OpenSBI firmware
fw_jump.bin for generic platform.
On SMP system, it depends on CONFIG_{HOTPLUG_CPU, RISCV_SBI} to
resume/stop hart through OpenSBI firmware, it also needs a OpenSBI that
support the HSM extension.
Signed-off-by: Liao Chang <liaochang1@huawei.com>
Signed-off-by: Li Zhengyu <lizhengyu3@huawei.com>
Link: https://lore.kernel.org/r/20220408100914.150110-4-lizhengyu3@huawei.com
[Palmer: Make 64-bit only]
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/kernel/machine_kexec_file.c')
| -rw-r--r-- | arch/riscv/kernel/machine_kexec_file.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/riscv/kernel/machine_kexec_file.c b/arch/riscv/kernel/machine_kexec_file.c new file mode 100644 index 000000000000..b0bf8c1722c0 --- /dev/null +++ b/arch/riscv/kernel/machine_kexec_file.c @@ -0,0 +1,14 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * kexec_file for riscv, use vmlinux as the dump-capture kernel image. + * + * Copyright (C) 2021 Huawei Technologies Co, Ltd. + * + * Author: Liao Chang (liaochang1@huawei.com) + */ +#include <linux/kexec.h> + +const struct kexec_file_ops * const kexec_file_loaders[] = { + &elf_kexec_ops, + NULL +}; |