Commit cda92ac4 authored by WANG Rui's avatar WANG Rui Committed by Ard Biesheuvel
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efi/libstub: Synchronize instruction cache after kernel relocation 



The relocated kernel image is copied to its new location using memcpy().
On architectures with separate instruction and data caches, the copied
instructions may remain stale in the instruction cache, leading to the
execution of outdated contents.

Call efi_cache_sync_image() after the relocation copy to ensure the
instruction cache is synchronized with the updated memory contents before
control is transferred to the relocated kernel.

Signed-off-by: default avatarWANG Rui <r@hev.cc>
Reviewed-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
Signed-off-by: default avatarArd Biesheuvel <ardb@kernel.org>
parent ad6f4f3e

drivers/firmware/efi/libstub/loongarch-stub.c

+1 −0
Original line number Diff line number Diff line
@@ -86,6 +86,7 @@ efi_status_t efi_relocate_kernel(unsigned long *image_addr, 
	 * have been allocated by UEFI, so we can safely use memcpy.

	 */

	memcpy((void *)new_addr, (void *)cur_image_addr, image_size);

	efi_cache_sync_image(new_addr, image_size);



	/* Return the new address of the relocated image. */

	*image_addr = new_addr;