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Diffstat (limited to 'drivers/firmware/efi/libstub/efi-stub-helper.c')
-rw-r--r--drivers/firmware/efi/libstub/efi-stub-helper.c150
1 files changed, 3 insertions, 147 deletions
diff --git a/drivers/firmware/efi/libstub/efi-stub-helper.c b/drivers/firmware/efi/libstub/efi-stub-helper.c
index 0c493521b25b..f5a4bdacac64 100644
--- a/drivers/firmware/efi/libstub/efi-stub-helper.c
+++ b/drivers/firmware/efi/libstub/efi-stub-helper.c
@@ -9,10 +9,8 @@
#include <linux/stdarg.h>
-#include <linux/ctype.h>
#include <linux/efi.h>
#include <linux/kernel.h>
-#include <linux/printk.h> /* For CONSOLE_LOGLEVEL_* */
#include <asm/efi.h>
#include <asm/setup.h>
@@ -20,7 +18,6 @@
bool efi_nochunk;
bool efi_nokaslr = !IS_ENABLED(CONFIG_RANDOMIZE_BASE);
-int efi_loglevel = CONSOLE_LOGLEVEL_DEFAULT;
bool efi_novamap;
static bool efi_noinitrd;
@@ -33,146 +30,6 @@ bool __pure __efi_soft_reserve_enabled(void)
}
/**
- * efi_char16_puts() - Write a UCS-2 encoded string to the console
- * @str: UCS-2 encoded string
- */
-void efi_char16_puts(efi_char16_t *str)
-{
- efi_call_proto(efi_table_attr(efi_system_table, con_out),
- output_string, str);
-}
-
-static
-u32 utf8_to_utf32(const u8 **s8)
-{
- u32 c32;
- u8 c0, cx;
- size_t clen, i;
-
- c0 = cx = *(*s8)++;
- /*
- * The position of the most-significant 0 bit gives us the length of
- * a multi-octet encoding.
- */
- for (clen = 0; cx & 0x80; ++clen)
- cx <<= 1;
- /*
- * If the 0 bit is in position 8, this is a valid single-octet
- * encoding. If the 0 bit is in position 7 or positions 1-3, the
- * encoding is invalid.
- * In either case, we just return the first octet.
- */
- if (clen < 2 || clen > 4)
- return c0;
- /* Get the bits from the first octet. */
- c32 = cx >> clen--;
- for (i = 0; i < clen; ++i) {
- /* Trailing octets must have 10 in most significant bits. */
- cx = (*s8)[i] ^ 0x80;
- if (cx & 0xc0)
- return c0;
- c32 = (c32 << 6) | cx;
- }
- /*
- * Check for validity:
- * - The character must be in the Unicode range.
- * - It must not be a surrogate.
- * - It must be encoded using the correct number of octets.
- */
- if (c32 > 0x10ffff ||
- (c32 & 0xf800) == 0xd800 ||
- clen != (c32 >= 0x80) + (c32 >= 0x800) + (c32 >= 0x10000))
- return c0;
- *s8 += clen;
- return c32;
-}
-
-/**
- * efi_puts() - Write a UTF-8 encoded string to the console
- * @str: UTF-8 encoded string
- */
-void efi_puts(const char *str)
-{
- efi_char16_t buf[128];
- size_t pos = 0, lim = ARRAY_SIZE(buf);
- const u8 *s8 = (const u8 *)str;
- u32 c32;
-
- while (*s8) {
- if (*s8 == '\n')
- buf[pos++] = L'\r';
- c32 = utf8_to_utf32(&s8);
- if (c32 < 0x10000) {
- /* Characters in plane 0 use a single word. */
- buf[pos++] = c32;
- } else {
- /*
- * Characters in other planes encode into a surrogate
- * pair.
- */
- buf[pos++] = (0xd800 - (0x10000 >> 10)) + (c32 >> 10);
- buf[pos++] = 0xdc00 + (c32 & 0x3ff);
- }
- if (*s8 == '\0' || pos >= lim - 2) {
- buf[pos] = L'\0';
- efi_char16_puts(buf);
- pos = 0;
- }
- }
-}
-
-/**
- * efi_printk() - Print a kernel message
- * @fmt: format string
- *
- * The first letter of the format string is used to determine the logging level
- * of the message. If the level is less then the current EFI logging level, the
- * message is suppressed. The message will be truncated to 255 bytes.
- *
- * Return: number of printed characters
- */
-int efi_printk(const char *fmt, ...)
-{
- char printf_buf[256];
- va_list args;
- int printed;
- int loglevel = printk_get_level(fmt);
-
- switch (loglevel) {
- case '0' ... '9':
- loglevel -= '0';
- break;
- default:
- /*
- * Use loglevel -1 for cases where we just want to print to
- * the screen.
- */
- loglevel = -1;
- break;
- }
-
- if (loglevel >= efi_loglevel)
- return 0;
-
- if (loglevel >= 0)
- efi_puts("EFI stub: ");
-
- fmt = printk_skip_level(fmt);
-
- va_start(args, fmt);
- printed = vsnprintf(printf_buf, sizeof(printf_buf), fmt, args);
- va_end(args);
-
- efi_puts(printf_buf);
- if (printed >= sizeof(printf_buf)) {
- efi_puts("[Message truncated]\n");
- return -1;
- }
-
- return printed;
-}
-
-/**
* efi_parse_options() - Parse EFI command line options
* @cmdline: kernel command line
*
@@ -626,8 +483,8 @@ static const struct {
/**
* efi_load_initrd_dev_path() - load the initrd from the Linux initrd device path
- * @load_addr: pointer to store the address where the initrd was loaded
- * @load_size: pointer to store the size of the loaded initrd
+ * @initrd: pointer of struct to store the address where the initrd was loaded
+ * and the size of the loaded initrd
* @max: upper limit for the initrd memory allocation
*
* Return:
@@ -681,8 +538,7 @@ efi_status_t efi_load_initrd_cmdline(efi_loaded_image_t *image,
unsigned long soft_limit,
unsigned long hard_limit)
{
- if (!IS_ENABLED(CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER) ||
- (IS_ENABLED(CONFIG_X86) && (!efi_is_native() || image == NULL)))
+ if (image == NULL)
return EFI_UNSUPPORTED;
return handle_cmdline_files(image, L"initrd=", sizeof(L"initrd=") - 2,