From b30be4dc733e5067b56def359b0823f1e54ded8c Mon Sep 17 00:00:00 2001 From: Rob Herring Date: Sun, 21 Feb 2021 09:49:22 -0800 Subject: of: Add a common kexec FDT setup function Both arm64 and powerpc do essentially the same FDT /chosen setup for kexec. The differences are either omissions that arm64 should have or additional properties that will be ignored. The setup code can be combined and shared by both powerpc and arm64. The differences relative to the arm64 version: - If /chosen doesn't exist, it will be created (should never happen). - Any old dtb and initrd reserved memory will be released. - The new initrd and elfcorehdr are marked reserved. - "linux,booted-from-kexec" is set. The differences relative to the powerpc version: - "kaslr-seed" and "rng-seed" may be set. - "linux,elfcorehdr" is set. - Any existing "linux,usable-memory-range" is removed. Combine the code for setting up the /chosen node in the FDT and updating the memory reservation for kexec, for powerpc and arm64, in of_kexec_alloc_and_setup_fdt() and move it to "drivers/of/kexec.c". Signed-off-by: Rob Herring Signed-off-by: Lakshmi Ramasubramanian Reviewed-by: Thiago Jung Bauermann Signed-off-by: Rob Herring Link: https://lore.kernel.org/r/20210221174930.27324-6-nramas@linux.microsoft.com --- include/linux/of.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'include/linux/of.h') diff --git a/include/linux/of.h b/include/linux/of.h index 4b27c9a27df3..d66c915df910 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -560,6 +560,11 @@ int of_map_id(struct device_node *np, u32 id, phys_addr_t of_dma_get_max_cpu_address(struct device_node *np); +struct kimage; +void *of_kexec_alloc_and_setup_fdt(const struct kimage *image, + unsigned long initrd_load_addr, + unsigned long initrd_len, + const char *cmdline, size_t extra_fdt_size); #else /* CONFIG_OF */ static inline void of_core_init(void) -- cgit v1.2.3