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efi/libstub: Use pool allocation for the command line

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Now that we removed the memory limit for the allocation of the
command line, there is no longer a need to use the page based
allocator so switch to a pool allocation instead.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
This commit is contained in:
Ard Biesheuvel 2020-05-19 10:43:01 +02:00
parent 80b1bfe1cb
commit 27cd5511fe
4 changed files with 7 additions and 8 deletions
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6
drivers/firmware/efi/libstub/efi-stub-helper.c
View File

@ -212,8 +212,7 @@ efi_status_t efi_parse_options(char const *cmdline)
* Size of memory allocated return in *cmd_line_len.
* Returns NULL on error.
*/
char *efi_convert_cmdline(efi_loaded_image_t *image,
int *cmd_line_len, unsigned long max_addr)
char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len)
{
const u16 *s2;
unsigned long cmdline_addr = 0;
@ -275,7 +274,8 @@ char *efi_convert_cmdline(efi_loaded_image_t *image,
options_bytes++; /* NUL termination */
status = efi_allocate_pages(options_bytes, &cmdline_addr, max_addr);
status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, options_bytes,
(void **)&cmdline_addr);
if (status != EFI_SUCCESS)
return NULL;

4
drivers/firmware/efi/libstub/efi-stub.c
View File

@ -198,7 +198,7 @@ efi_status_t efi_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg)
* protocol. We are going to copy the command line into the
* device tree, so this can be allocated anywhere.
*/
cmdline_ptr = efi_convert_cmdline(image, &cmdline_size, ULONG_MAX);
cmdline_ptr = efi_convert_cmdline(image, &cmdline_size);
if (!cmdline_ptr) {
efi_err("getting command line via LOADED_IMAGE_PROTOCOL\n");
status = EFI_OUT_OF_RESOURCES;
@ -339,7 +339,7 @@ efi_status_t efi_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg)
fail_free_screeninfo:
free_screen_info(si);
fail_free_cmdline:
efi_free(cmdline_size, (unsigned long)cmdline_ptr);
efi_bs_call(free_pool, cmdline_ptr);
fail:
return status;
}

3
drivers/firmware/efi/libstub/efistub.h
View File

@ -708,8 +708,7 @@ __printf(1, 2) int efi_printk(char const *fmt, ...);
void efi_free(unsigned long size, unsigned long addr);
char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len,
unsigned long max_addr);
char *efi_convert_cmdline(efi_loaded_image_t *image, int *cmd_line_len);
efi_status_t efi_get_memory_map(struct efi_boot_memmap *map);

2
drivers/firmware/efi/libstub/x86-stub.c
View File

@ -404,7 +404,7 @@ 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, ULONG_MAX);
cmdline_ptr = efi_convert_cmdline(image, &options_size);
if (!cmdline_ptr)
goto fail;