efi/libstub: arm64: Remap relocated image with strict permissions

After relocating the executable image, use the EFI memory attributes
protocol to remap the code and data regions with the appropriate
permissions.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>

diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c
index d4a6b12..b996553 100644 (file)
--- a/drivers/firmware/efi/libstub/arm64-stub.c
+++ b/drivers/firmware/efi/libstub/arm64-stub.c
@@ -139,6 +139,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
        *image_addr = *reserve_addr;
        memcpy((void *)*image_addr, _text, kernel_size);
        caches_clean_inval_pou(*image_addr, *image_addr + kernel_codesize);
+       efi_remap_image(*image_addr, *reserve_size, kernel_codesize);
 
        return EFI_SUCCESS;
 }