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arm64: kexec_file: load initrd and device-tree

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load_other_segments() is expected to allocate and place all the necessary
memory segments other than kernel, including initrd and device-tree
blob (and elf core header for crash).
While most of the code was borrowed from kexec-tools' counterpart,
users may not be allowed to specify dtb explicitly, instead, the dtb
presented by the original boot loader is reused.

arch_kimage_kernel_post_load_cleanup() is responsible for freeing arm64-
specific data allocated in load_other_segments().

Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
This commit is contained in:
AKASHI Takahiro
2018-11-15 14:52:49 +09:00
committed by Will Deacon
parent 3ddd9992a5
commit 52b2a8af74
2 changed files with 202 additions and 0 deletions
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17
arch/arm64/include/asm/kexec.h
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@@ -93,6 +93,23 @@ static inline void crash_prepare_suspend(void) {}
static inline void crash_post_resume(void) {}
#endif
#ifdef CONFIG_KEXEC_FILE
#define ARCH_HAS_KIMAGE_ARCH
struct kimage_arch {
void *dtb;
unsigned long dtb_mem;
};
struct kimage;
extern int arch_kimage_file_post_load_cleanup(struct kimage *image);
extern int load_other_segments(struct kimage *image,
unsigned long kernel_load_addr, unsigned long kernel_size,
char *initrd, unsigned long initrd_len,
char *cmdline);
#endif
#endif /* __ASSEMBLY__ */
#endif