diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2020-03-08 09:08:57 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-03-08 10:00:07 +0100 |
| commit | ac82d356994dd24616a59a95c575543aab44a00b (patch) | |
| tree | 4f967bcdd91af1cab213cd3db8262c4b36f3751c /drivers/firmware | |
| parent | 8d8ab66a717aca0941da3b1d57d350f3b523df43 (diff) | |
| download | linux-ac82d356994dd24616a59a95c575543aab44a00b.tar.bz2 | |
efi/libstub/x86: Use ULONG_MAX as upper bound for all allocations
The header flag XLF_CAN_BE_LOADED_ABOVE_4G will inform us whether
allocations above 4 GiB for kernel, command line, etc are permitted,
so we take it into account when calling efi_allocate_pages() etc.
However, CONFIG_EFI_STUB implies CONFIG_RELOCATABLE, and so the flag
is guaranteed to be set on x86_64 builds, whereas i386 builds are
guaranteed to run under firmware that will not allocate above 4 GB
in the first place.
So drop the check, and just pass ULONG_MAX as the upper bound for
all allocations.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200303225054.28741-1-ardb@kernel.org
Link: https://lore.kernel.org/r/20200308080859.21568-27-ardb@kernel.org
Diffstat (limited to 'drivers/firmware')
| -rw-r--r-- | drivers/firmware/efi/libstub/x86-stub.c | 17 |
1 files changed, 4 insertions, 13 deletions
diff --git a/drivers/firmware/efi/libstub/x86-stub.c b/drivers/firmware/efi/libstub/x86-stub.c index 4615d29dd665..383f59d44fbe 100644 --- a/drivers/firmware/efi/libstub/x86-stub.c +++ b/drivers/firmware/efi/libstub/x86-stub.c @@ -376,7 +376,6 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, char *cmdline_ptr; unsigned long ramdisk_addr; unsigned long ramdisk_size; - bool above4g; sys_table = sys_table_arg; @@ -394,10 +393,8 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, image_offset = (void *)startup_32 - image_base; hdr = &((struct boot_params *)image_base)->hdr; - above4g = hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G; - status = efi_allocate_pages(0x4000, (unsigned long *)&boot_params, - above4g ? ULONG_MAX : UINT_MAX); + status = efi_allocate_pages(0x4000, (unsigned long *)&boot_params, ULONG_MAX); if (status != EFI_SUCCESS) { efi_printk("Failed to allocate lowmem for boot params\n"); efi_exit(handle, status); @@ -421,8 +418,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, hdr->type_of_loader = 0x21; /* Convert unicode cmdline to ascii */ - cmdline_ptr = efi_convert_cmdline(image, &options_size, - above4g ? ULONG_MAX : UINT_MAX); + cmdline_ptr = efi_convert_cmdline(image, &options_size, ULONG_MAX); if (!cmdline_ptr) goto fail; @@ -442,8 +438,7 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle, status = efi_load_initrd(image, &ramdisk_addr, &ramdisk_size, hdr->initrd_addr_max, - above4g ? ULONG_MAX - : hdr->initrd_addr_max); + ULONG_MAX); if (status != EFI_SUCCESS) goto fail2; hdr->ramdisk_image = ramdisk_addr & 0xffffffff; @@ -795,12 +790,8 @@ unsigned long efi_main(efi_handle_t handle, */ if (!noinitrd()) { unsigned long addr, size; - unsigned long max_addr = hdr->initrd_addr_max; - if (hdr->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G) - max_addr = ULONG_MAX; - - status = efi_load_initrd_dev_path(&addr, &size, max_addr); + status = efi_load_initrd_dev_path(&addr, &size, ULONG_MAX); if (status == EFI_SUCCESS) { hdr->ramdisk_image = (u32)addr; hdr->ramdisk_size = (u32)size; |