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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/parisc/kernel/kexec_file.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/parisc/kernel/kexec_file.c')
-rw-r--r-- | arch/parisc/kernel/kexec_file.c | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/arch/parisc/kernel/kexec_file.c b/arch/parisc/kernel/kexec_file.c new file mode 100644 index 0000000000..8c534204f0 --- /dev/null +++ b/arch/parisc/kernel/kexec_file.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Load ELF vmlinux file for the kexec_file_load syscall. + * + * Copyright (c) 2019 Sven Schnelle <svens@stackframe.org> + * + */ +#include <linux/elf.h> +#include <linux/kexec.h> +#include <linux/libfdt.h> +#include <linux/module.h> +#include <linux/of_fdt.h> +#include <linux/slab.h> +#include <linux/types.h> + +static void *elf_load(struct kimage *image, char *kernel_buf, + unsigned long kernel_len, char *initrd, + unsigned long initrd_len, char *cmdline, + unsigned long cmdline_len) +{ + int ret, i; + unsigned long kernel_load_addr; + struct elfhdr ehdr; + struct kexec_elf_info elf_info; + struct kexec_buf kbuf = { .image = image, .buf_min = 0, + .buf_max = -1UL, }; + + ret = kexec_build_elf_info(kernel_buf, kernel_len, &ehdr, &elf_info); + if (ret) + goto out; + + ret = kexec_elf_load(image, &ehdr, &elf_info, &kbuf, &kernel_load_addr); + if (ret) + goto out; + + image->start = __pa(elf_info.ehdr->e_entry); + + for (i = 0; i < image->nr_segments; i++) + image->segment[i].mem = __pa(image->segment[i].mem); + + pr_debug("Loaded the kernel at 0x%lx, entry at 0x%lx\n", + kernel_load_addr, image->start); + + if (initrd != NULL) { + kbuf.buffer = initrd; + kbuf.bufsz = kbuf.memsz = initrd_len; + kbuf.buf_align = PAGE_SIZE; + kbuf.top_down = false; + kbuf.mem = KEXEC_BUF_MEM_UNKNOWN; + ret = kexec_add_buffer(&kbuf); + if (ret) + goto out; + + pr_debug("Loaded initrd at 0x%lx\n", kbuf.mem); + image->arch.initrd_start = kbuf.mem; + image->arch.initrd_end = kbuf.mem + initrd_len; + } + + if (cmdline != NULL) { + kbuf.buffer = cmdline; + kbuf.bufsz = kbuf.memsz = ALIGN(cmdline_len, 8); + kbuf.buf_align = PAGE_SIZE; + kbuf.top_down = false; + kbuf.buf_min = PAGE0->mem_free + PAGE_SIZE; + kbuf.buf_max = kernel_load_addr; + kbuf.mem = KEXEC_BUF_MEM_UNKNOWN; + ret = kexec_add_buffer(&kbuf); + if (ret) + goto out; + + pr_debug("Loaded cmdline at 0x%lx\n", kbuf.mem); + image->arch.cmdline = kbuf.mem; + } +out: + return NULL; +} + +const struct kexec_file_ops kexec_elf_ops = { + .probe = kexec_elf_probe, + .load = elf_load, +}; + +const struct kexec_file_ops * const kexec_file_loaders[] = { + &kexec_elf_ops, + NULL +}; |