The arm64 kernel no longer requires the FDT blob to fit inside a
naturally aligned 2 MB memory block, so remove the code that aligns
the allocation to 2 MB.
Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
---
arch/arm64/include/asm/efi.h | 7 -------
drivers/firmware/efi/libstub/fdt.c | 6 +-----
2 files changed, 1 insertion(+), 12 deletions(-)
diff --git a/arch/arm64/include/asm/efi.h b/arch/arm64/include/asm/efi.h
index 56ae87401a26..45e821222774 100644
--- a/arch/arm64/include/asm/efi.h
+++ b/arch/arm64/include/asm/efi.h
@@ -57,13 +57,6 @@ efi_status_t __efi_rt_asm_wrapper(void *, const char *, ...);
/* arch specific definitions used by the stub code */
-/*
- * AArch64 requires the DTB to be 8-byte aligned in the first 512MiB from
- * start of kernel and may not cross a 2MiB boundary. We set alignment to
- * 2MiB so we know it won't cross a 2MiB boundary.
- */
-#define EFI_FDT_ALIGN SZ_2M /* used by allocate_new_fdt_and_exit_boot() */
-
/*
* In some configurations (e.g. VMAP_STACK && 64K pages), stacks built into the
* kernel need greater alignment than we require the segments to be padded to.
diff --git a/drivers/firmware/efi/libstub/fdt.c b/drivers/firmware/efi/libstub/fdt.c
index 0a91e5232127..f71cd54823b7 100644
--- a/drivers/firmware/efi/libstub/fdt.c
+++ b/drivers/firmware/efi/libstub/fdt.c
@@ -199,10 +199,6 @@ static efi_status_t update_fdt_memmap(void *fdt, struct efi_boot_memmap *map)
return EFI_SUCCESS;
}
-#ifndef EFI_FDT_ALIGN
-# define EFI_FDT_ALIGN EFI_PAGE_SIZE
-#endif
-
struct exit_boot_struct {
efi_memory_desc_t *runtime_map;
int *runtime_entry_count;
@@ -281,7 +277,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
pr_efi("Exiting boot services and installing virtual address map...\n");
map.map = &memory_map;
- status = efi_high_alloc(MAX_FDT_SIZE, EFI_FDT_ALIGN,
+ status = efi_high_alloc(MAX_FDT_SIZE, EFI_PAGE_SIZE,
new_fdt_addr, max_addr);
if (status != EFI_SUCCESS) {
pr_efi_err("Unable to allocate memory for new device tree.\n");
--
2.17.1
