On Mon, Apr 13, 2020 at 8:55 AM Ard Biesheuvel <ardb@xxxxxxxxxx> wrote:
>
> It is no longer necessary to locate the kernel as low as possible in
> physical memory, and so we can switch from efi_low_alloc() [which is
> a rather nasty concoction on top of GetMemoryMap()] to a new helper
> called efi_allocate_pages_aligned(), which simply rounds up the size
> to account for the alignment, and frees the misaligned pages again.
>
> So considering that the kernel can live anywhere in the physical
> address space, as long as its alignment requirements are met, let's
> switch to efi_allocate_pages_aligned() to allocate the pages.
>
> Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
> ---
> drivers/firmware/efi/libstub/arm64-stub.c | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/firmware/efi/libstub/arm64-stub.c b/drivers/firmware/efi/libstub/arm64-stub.c
> index 6fc3bd9a56db..99b67e88a33b 100644
> --- a/drivers/firmware/efi/libstub/arm64-stub.c
> +++ b/drivers/firmware/efi/libstub/arm64-stub.c
> @@ -98,8 +98,8 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
> return EFI_SUCCESS;
> }
>
> - status = efi_low_alloc(*reserve_size,
> - min_kimg_align, reserve_addr);
> + status = efi_allocate_pages_aligned(*reserve_size, reserve_addr,
> + ULONG_MAX, min_kimg_align);
>
> if (status != EFI_SUCCESS) {
> pr_efi_err("Failed to relocate kernel\n");
> --
> 2.17.1
>
Reviewed-by: Atish Patra <atish.patra@xxxxxxx>
--
Regards,
Atish
