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efi: stub: get rid of efi_get_max_fdt_addr() 

Now that ARM started following the example of arm64 and RISC-V, and
no longer imposes any restrictions on the placement of the FDT in
memory at boot, we no longer need per-arch implementations of
efi_get_max_fdt_addr() to factor out the differences. So get rid of
it.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Atish Patra <atish.patra@wdc.com>
Link: https://lore.kernel.org/r/20201029134901.9773-1-ardb@kernel.org
This commit is contained in:
Ard Biesheuvel 2020-10-29 14:49:01 +01:00
parent ff20661bb5
commit 54649911f3
6 changed files with 1 additions and 22 deletions
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6
arch/arm/include/asm/efi.h
View File

@ -73,12 +73,6 @@ static inline void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
*/
#define EFI_PHYS_ALIGN max(SZ_2M, roundup_pow_of_two(TEXT_OFFSET))
/* on ARM, the FDT should be located in a lowmem region */
static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)
{
return round_down(image_addr, EFI_PHYS_ALIGN) + SZ_512M;
}
/* on ARM, the initrd should be loaded in a lowmem region */
static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
{

6
arch/arm64/include/asm/efi.h
View File

@ -64,12 +64,6 @@ efi_status_t __efi_rt_asm_wrapper(void *, const char *, ...);
#define EFI_KIMG_ALIGN \
(SEGMENT_ALIGN > THREAD_ALIGN ? SEGMENT_ALIGN : THREAD_ALIGN)
/* on arm64, the FDT may be located anywhere in system RAM */
static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)
{
return ULONG_MAX;
}
/*
* On arm64, we have to ensure that the initrd ends up in the linear region,
* which is a 1 GB aligned region of size '1UL << (VA_BITS_MIN - 1)' that is

6
arch/riscv/include/asm/efi.h
View File

@ -27,12 +27,6 @@ int efi_set_mapping_permissions(struct mm_struct *mm, efi_memory_desc_t *md);
#define ARCH_EFI_IRQ_FLAGS_MASK (SR_IE | SR_SPIE)
/* on RISC-V, the FDT may be located anywhere in system RAM */
static inline unsigned long efi_get_max_fdt_addr(unsigned long image_addr)
{
return ULONG_MAX;
}
/* Load initrd at enough distance from DRAM start */
static inline unsigned long efi_get_max_initrd_addr(unsigned long image_addr)
{

1
drivers/firmware/efi/libstub/efi-stub.c
View File

@ -273,7 +273,6 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
install_memreserve_table();
status = allocate_new_fdt_and_exit_boot(handle, &fdt_addr,
efi_get_max_fdt_addr(image_addr),
initrd_addr, initrd_size,
cmdline_ptr, fdt_addr, fdt_size);
if (status != EFI_SUCCESS)

1
drivers/firmware/efi/libstub/efistub.h
View File

@ -750,7 +750,6 @@ efi_status_t efi_exit_boot_services(void *handle,
efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
unsigned long *new_fdt_addr,
unsigned long max_addr,
u64 initrd_addr, u64 initrd_size,
char *cmdline_ptr,
unsigned long fdt_addr,

3
drivers/firmware/efi/libstub/fdt.c
View File

@ -238,7 +238,6 @@ static efi_status_t exit_boot_func(struct efi_boot_memmap *map,
efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
unsigned long *new_fdt_addr,
unsigned long max_addr,
u64 initrd_addr, u64 initrd_size,
char *cmdline_ptr,
unsigned long fdt_addr,
@ -275,7 +274,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
efi_info("Exiting boot services and installing virtual address map...\n");
map.map = &memory_map;
status = efi_allocate_pages(MAX_FDT_SIZE, new_fdt_addr, max_addr);
status = efi_allocate_pages(MAX_FDT_SIZE, new_fdt_addr, ULONG_MAX);
if (status != EFI_SUCCESS) {
efi_err("Unable to allocate memory for new device tree.\n");
goto fail;