If we cannot relocate the kernel Image to its preferred offset of base of DRAM
plus TEXT_OFFSET, instead relocate it to the lowest available 2 MB boundary plus
TEXT_OFFSET. We may lose a bit of memory at the low end, but we can still
proceed normally otherwise.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
---
arch/arm64/kernel/efi-stub.c | 16 ++++++----------
1 file changed, 6 insertions(+), 10 deletions(-)
diff --git a/arch/arm64/kernel/efi-stub.c b/arch/arm64/kernel/efi-stub.c
index 60e98a639ac5..460c00c41e57 100644
--- a/arch/arm64/kernel/efi-stub.c
+++ b/arch/arm64/kernel/efi-stub.c
@@ -60,20 +60,16 @@ static efi_status_t handle_kernel_image(efi_system_table_t *sys_table,
kernel_size = _edata - _text;
if (*image_addr != (dram_base + TEXT_OFFSET)) {
kernel_memsize = kernel_size + (_end - _edata);
- status = efi_relocate_kernel(sys_table, image_addr,
- kernel_size, kernel_memsize,
- dram_base + TEXT_OFFSET,
- PAGE_SIZE);
+ status = efi_low_alloc(sys_table, kernel_memsize + TEXT_OFFSET,
+ SZ_2M, reserve_addr);
if (status != EFI_SUCCESS) {
pr_efi_err(sys_table, "Failed to relocate kernel\n");
return status;
}
- if (*image_addr != (dram_base + TEXT_OFFSET)) {
- pr_efi_err(sys_table, "Failed to alloc kernel memory\n");
- efi_free(sys_table, kernel_memsize, *image_addr);
- return EFI_ERROR;
- }
- *image_size = kernel_memsize;
+ memcpy((void *)*reserve_addr + TEXT_OFFSET, (void *)*image_addr,
+ kernel_size);
+ *image_addr = *reserve_addr + TEXT_OFFSET;
+ *reserve_size = kernel_memsize + TEXT_OFFSET;
}
--
1.8.3.2
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