From 60fe3910bb029e3671ce7ac080a7acb7e032b9e0 Mon Sep 17 00:00:00 2001 From: Thiago Jung Bauermann Date: Tue, 29 Nov 2016 23:45:47 +1100 Subject: kexec_file: Allow arch-specific memory walking for kexec_add_buffer Allow architectures to specify a different memory walking function for kexec_add_buffer. x86 uses iomem to track reserved memory ranges, but PowerPC uses the memblock subsystem. Signed-off-by: Thiago Jung Bauermann Acked-by: Dave Young Acked-by: Balbir Singh Signed-off-by: Michael Ellerman --- include/linux/kexec.h | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) (limited to 'include/linux') diff --git a/include/linux/kexec.h b/include/linux/kexec.h index 406c33dcae13..5e320ddaaa82 100644 --- a/include/linux/kexec.h +++ b/include/linux/kexec.h @@ -148,7 +148,34 @@ struct kexec_file_ops { kexec_verify_sig_t *verify_sig; #endif }; -#endif + +/** + * struct kexec_buf - parameters for finding a place for a buffer in memory + * @image: kexec image in which memory to search. + * @buffer: Contents which will be copied to the allocated memory. + * @bufsz: Size of @buffer. + * @mem: On return will have address of the buffer in memory. + * @memsz: Size for the buffer in memory. + * @buf_align: Minimum alignment needed. + * @buf_min: The buffer can't be placed below this address. + * @buf_max: The buffer can't be placed above this address. + * @top_down: Allocate from top of memory. + */ +struct kexec_buf { + struct kimage *image; + char *buffer; + unsigned long bufsz; + unsigned long mem; + unsigned long memsz; + unsigned long buf_align; + unsigned long buf_min; + unsigned long buf_max; + bool top_down; +}; + +int __weak arch_kexec_walk_mem(struct kexec_buf *kbuf, + int (*func)(u64, u64, void *)); +#endif /* CONFIG_KEXEC_FILE */ struct kimage { kimage_entry_t head; -- cgit v1.3-18-gd494