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Diffstat (limited to 'arch/arm64/kernel/efi-stub.c')
-rw-r--r--arch/arm64/kernel/efi-stub.c14
1 files changed, 12 insertions, 2 deletions
diff --git a/arch/arm64/kernel/efi-stub.c b/arch/arm64/kernel/efi-stub.c
index 816120ece6bc..78dfbd34b6bf 100644
--- a/arch/arm64/kernel/efi-stub.c
+++ b/arch/arm64/kernel/efi-stub.c
@@ -25,10 +25,20 @@ efi_status_t __init handle_kernel_image(efi_system_table_t *sys_table_arg,
unsigned long kernel_size, kernel_memsize = 0;
unsigned long nr_pages;
void *old_image_addr = (void *)*image_addr;
+ unsigned long preferred_offset;
+
+ /*
+ * The preferred offset of the kernel Image is TEXT_OFFSET bytes beyond
+ * a 2 MB aligned base, which itself may be lower than dram_base, as
+ * long as the resulting offset equals or exceeds it.
+ */
+ preferred_offset = round_down(dram_base, SZ_2M) + TEXT_OFFSET;
+ if (preferred_offset < dram_base)
+ preferred_offset += SZ_2M;
/* Relocate the image, if required. */
kernel_size = _edata - _text;
- if (*image_addr != (dram_base + TEXT_OFFSET)) {
+ if (*image_addr != preferred_offset) {
kernel_memsize = kernel_size + (_end - _edata);
/*
@@ -42,7 +52,7 @@ efi_status_t __init handle_kernel_image(efi_system_table_t *sys_table_arg,
* Mustang), we can still place the kernel at the address
* 'dram_base + TEXT_OFFSET'.
*/
- *image_addr = *reserve_addr = dram_base + TEXT_OFFSET;
+ *image_addr = *reserve_addr = preferred_offset;
nr_pages = round_up(kernel_memsize, EFI_ALLOC_ALIGN) /
EFI_PAGE_SIZE;
status = efi_call_early(allocate_pages, EFI_ALLOCATE_ADDRESS,