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| author |   Pasha Tatashin <pasha.tatashin@soleen.com> | 2021-09-30 14:31:08 +0000 |
|---|---|---|
| committer |   Will Deacon <will@kernel.org> | 2021-10-01 13:31:00 +0100 |
| commit | 19a046f07ce5a5c34ebb6432192d98cfdb38444f (patch) | |
| tree | 6fef169425715072bc67c45b1bf423e241609cc0 /arch/arm64/kernel/machine_kexec.c | |
| parent | arm64: kexec: relocate in EL1 mode (diff) | |
| download | linux-dev-19a046f07ce5a5c34ebb6432192d98cfdb38444f.tar.xz linux-dev-19a046f07ce5a5c34ebb6432192d98cfdb38444f.zip | |
arm64: kexec: use ld script for relocation function
Currently, relocation code declares start and end variables
which are used to compute its size.
The better way to do this is to use ld script, and put relocation
function in its own section.
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20210930143113.1502553-11-pasha.tatashin@soleen.com
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/machine_kexec.c')
| -rw-r--r-- | arch/arm64/kernel/machine_kexec.c | 16 |
1 files changed, 6 insertions, 10 deletions
diff --git a/arch/arm64/kernel/machine_kexec.c b/arch/arm64/kernel/machine_kexec.c index cf5d6f22a041..320442d35811 100644 --- a/arch/arm64/kernel/machine_kexec.c +++ b/arch/arm64/kernel/machine_kexec.c @@ -21,14 +21,11 @@ #include <asm/mmu.h> #include <asm/mmu_context.h> #include <asm/page.h> +#include <asm/sections.h> #include <asm/trans_pgd.h> #include "cpu-reset.h" -/* Global variables for the arm64_relocate_new_kernel routine. */ -extern const unsigned char arm64_relocate_new_kernel[]; -extern const unsigned long arm64_relocate_new_kernel_size; - /** * kexec_image_info - For debugging output. */ @@ -163,6 +160,7 @@ static void *kexec_page_alloc(void *arg) int machine_kexec_post_load(struct kimage *kimage) { void *reloc_code = page_to_virt(kimage->control_code_page); + long reloc_size; struct trans_pgd_info info = { .trans_alloc_page = kexec_page_alloc, .trans_alloc_arg = kimage, @@ -183,17 +181,15 @@ int machine_kexec_post_load(struct kimage *kimage) return rc; } - memcpy(reloc_code, arm64_relocate_new_kernel, - arm64_relocate_new_kernel_size); + reloc_size = __relocate_new_kernel_end - __relocate_new_kernel_start; + memcpy(reloc_code, __relocate_new_kernel_start, reloc_size); kimage->arch.kern_reloc = __pa(reloc_code); /* Flush the reloc_code in preparation for its execution. */ dcache_clean_inval_poc((unsigned long)reloc_code, - (unsigned long)reloc_code + - arm64_relocate_new_kernel_size); + (unsigned long)reloc_code + reloc_size); icache_inval_pou((uintptr_t)reloc_code, - (uintptr_t)reloc_code + - arm64_relocate_new_kernel_size); + (uintptr_t)reloc_code + reloc_size); kexec_list_flush(kimage); kexec_image_info(kimage); |