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efi/libstub: consolidate initrd handling across architectures

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Before adding TPM measurement of the initrd contents, refactor the
initrd handling slightly to be more self-contained and consistent.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Link: https://lore.kernel.org/r/20211119114745.1560453-4-ilias.apalodimas@linaro.org
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel 2021-11-19 13:47:44 +02:00
parent 44f155b4b0
commit 20287d56f5
4 changed files with 21 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/firmware/efi/libstub/efi-stub-helper.c
View File

@ -20,10 +20,10 @@
bool efi_nochunk;
bool efi_nokaslr = !IS_ENABLED(CONFIG_RANDOMIZE_BASE);
bool efi_noinitrd;
int efi_loglevel = CONSOLE_LOGLEVEL_DEFAULT;
bool efi_novamap;
static bool efi_noinitrd;
static bool efi_nosoftreserve;
static bool efi_disable_pci_dma = IS_ENABLED(CONFIG_EFI_DISABLE_PCI_DMA);
@ -643,8 +643,10 @@ efi_status_t efi_load_initrd(efi_loaded_image_t *image,
{
efi_status_t status;
if (!load_addr || !load_size)
return EFI_INVALID_PARAMETER;
if (efi_noinitrd) {
*load_addr = *load_size = 0;
return EFI_SUCCESS;
}
status = efi_load_initrd_dev_path(load_addr, load_size, hard_limit);
if (status == EFI_SUCCESS) {
@ -655,7 +657,10 @@ efi_status_t efi_load_initrd(efi_loaded_image_t *image,
if (status == EFI_SUCCESS && *load_size > 0)
efi_info("Loaded initrd from command line option\n");
}
if (status != EFI_SUCCESS) {
efi_err("Failed to load initrd: 0x%lx\n", status);
*load_addr = *load_size = 0;
}
return status;
}

10
drivers/firmware/efi/libstub/efi-stub.c
View File

@ -134,7 +134,6 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
enum efi_secureboot_mode secure_boot;
struct screen_info *si;
efi_properties_table_t *prop_tbl;
unsigned long max_addr;
efi_system_table = sys_table_arg;
@ -240,13 +239,8 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
if (!fdt_addr)
efi_info("Generating empty DTB\n");
if (!efi_noinitrd) {
max_addr = efi_get_max_initrd_addr(image_addr);
status = efi_load_initrd(image, &initrd_addr, &initrd_size,
ULONG_MAX, max_addr);
if (status != EFI_SUCCESS)
efi_err("Failed to load initrd!\n");
}
efi_load_initrd(image, &initrd_addr, &initrd_size, ULONG_MAX,
efi_get_max_initrd_addr(image_addr));
efi_random_get_seed();

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

@ -31,7 +31,6 @@
extern bool efi_nochunk;
extern bool efi_nokaslr;
extern bool efi_noinitrd;
extern int efi_loglevel;
extern bool efi_novamap;

26
drivers/firmware/efi/libstub/x86-stub.c
View File

@ -673,6 +673,7 @@ unsigned long efi_main(efi_handle_t handle,
unsigned long bzimage_addr = (unsigned long)startup_32;
unsigned long buffer_start, buffer_end;
struct setup_header *hdr = &boot_params->hdr;
unsigned long addr, size;
efi_status_t status;
efi_system_table = sys_table_arg;
@ -761,22 +762,15 @@ unsigned long efi_main(efi_handle_t handle,
* arguments will be processed only if image is not NULL, which will be
* the case only if we were loaded via the PE entry point.
*/
if (!efi_noinitrd) {
unsigned long addr, size;
status = efi_load_initrd(image, &addr, &size,
hdr->initrd_addr_max, ULONG_MAX);
if (status != EFI_SUCCESS) {
efi_err("Failed to load initrd!\n");
goto fail;
}
if (size > 0) {
efi_set_u64_split(addr, &hdr->ramdisk_image,
&boot_params->ext_ramdisk_image);
efi_set_u64_split(size, &hdr->ramdisk_size,
&boot_params->ext_ramdisk_size);
}
status = efi_load_initrd(image, &addr, &size, hdr->initrd_addr_max,
ULONG_MAX);
if (status != EFI_SUCCESS)
goto fail;
if (size > 0) {
efi_set_u64_split(addr, &hdr->ramdisk_image,
&boot_params->ext_ramdisk_image);
efi_set_u64_split(size, &hdr->ramdisk_size,
&boot_params->ext_ramdisk_size);
}
/*