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More EFI changes for v5.8:

Browse source 
- Rename pr_efi/pr_efi_err to efi_info/efi_err, and use them consistently
 - Simplify and unify initrd loading
 - Parse the builtin command line on x86 (if provided)
 - Implement printk() support, including support for wide character strings
 - Some fixes for issues introduced by the first batch of v5.8 changes
 - Fix a missing prototypes warning
 - Simplify GDT handling in early mixed mode thunking code
 - Some other minor fixes and cleanups
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Merge tag 'efi-changes-for-v5.8' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi into efi/core

More EFI changes for v5.8:

 - Rename pr_efi/pr_efi_err to efi_info/efi_err, and use them consistently
 - Simplify and unify initrd loading
 - Parse the builtin command line on x86 (if provided)
 - Implement printk() support, including support for wide character strings
 - Some fixes for issues introduced by the first batch of v5.8 changes
 - Fix a missing prototypes warning
 - Simplify GDT handling in early mixed mode thunking code
 - Some other minor fixes and cleanups

Conflicts:
	drivers/firmware/efi/libstub/efistub.h

Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2020-05-25 15:11:14 +02:00
parent a5d8e55b2c 9241dfe7f2
commit d1343da330
24 changed files with 1214 additions and 316 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
Documentation/fb/efifb.rst
View file

@ -63,4 +63,9 @@ auto
with the highest resolution, it will choose one with the highest color
depth.
list
The EFI stub will list out all the display modes that are available. A
specific mode can then be chosen using one of the above options for the
next boot.
Edgar Hucek <gimli@dark-green.com>

2
arch/arm/boot/compressed/efi-header.S
View file

@ -60,7 +60,7 @@ optional_header:
.long __pecoff_code_size @ SizeOfCode
.long __pecoff_data_size @ SizeOfInitializedData
.long 0 @ SizeOfUninitializedData
.long efi_entry - start @ AddressOfEntryPoint
.long efi_pe_entry - start @ AddressOfEntryPoint
.long start_offset @ BaseOfCode
.long __pecoff_data_start - start @ BaseOfData

2
arch/arm64/kernel/efi-entry.S
View file

@ -14,7 +14,7 @@
SYM_CODE_START(efi_enter_kernel)
/*
* efi_entry() will have copied the kernel image if necessary and we
* efi_pe_entry() will have copied the kernel image if necessary and we
* end up here with device tree address in x1 and the kernel entry
* point stored in x0. Save those values in registers which are
* callee preserved.

2
arch/arm64/kernel/efi-header.S
View file

@ -27,7 +27,7 @@ optional_header:
.long __initdata_begin - efi_header_end // SizeOfCode
.long __pecoff_data_size // SizeOfInitializedData
.long 0 // SizeOfUninitializedData
.long __efistub_efi_entry - _head // AddressOfEntryPoint
.long __efistub_efi_pe_entry - _head // AddressOfEntryPoint
.long efi_header_end - _head // BaseOfCode
extra_header_fields:

19
arch/x86/boot/compressed/efi_thunk_64.S
View file

@ -28,8 +28,6 @@ SYM_FUNC_START(__efi64_thunk)
push %rbx
leaq 1f(%rip), %rbp
leaq efi_gdt64(%rip), %rbx
movl %ebx, 2(%rbx) /* Fixup the gdt base address */
movl %ds, %eax
push %rax
@ -48,7 +46,8 @@ SYM_FUNC_START(__efi64_thunk)
movl %r8d, 0xc(%rsp)
movl %r9d, 0x10(%rsp)
sgdt 0x14(%rsp)
leaq 0x14(%rsp), %rbx
sgdt (%rbx)
/*
* Switch to gdt with 32-bit segments. This is the firmware GDT
@ -68,8 +67,7 @@ SYM_FUNC_START(__efi64_thunk)
pushq %rax
lretq
1: lgdt 0x14(%rsp)
addq $32, %rsp
1: addq $32, %rsp
movq %rdi, %rax
pop %rbx
@ -175,14 +173,3 @@ SYM_DATA_END(efi32_boot_cs)
SYM_DATA_START(efi32_boot_ds)
.word 0
SYM_DATA_END(efi32_boot_ds)
SYM_DATA_START(efi_gdt64)
.word efi_gdt64_end - efi_gdt64
.long 0 /* Filled out by user */
.word 0
.quad 0x0000000000000000 /* NULL descriptor */
.quad 0x00af9a000000ffff /* __KERNEL_CS */
.quad 0x00cf92000000ffff /* __KERNEL_DS */
.quad 0x0080890000000000 /* TS descriptor */
.quad 0x0000000000000000 /* TS continued */
SYM_DATA_END_LABEL(efi_gdt64, SYM_L_LOCAL, efi_gdt64_end)

29
arch/x86/include/asm/efi.h
View file

@ -9,6 +9,7 @@
#include <asm/nospec-branch.h>
#include <asm/mmu_context.h>
#include <linux/build_bug.h>
#include <linux/kernel.h>
extern unsigned long efi_fw_vendor, efi_config_table;
@ -225,13 +226,15 @@ efi_status_t efi_set_virtual_address_map(unsigned long memory_map_size,
/* arch specific definitions used by the stub code */
extern const bool efi_is64;
#ifdef CONFIG_EFI_MIXED
#define ARCH_HAS_EFISTUB_WRAPPERS
static inline bool efi_is_64bit(void)
{
if (IS_ENABLED(CONFIG_EFI_MIXED))
return efi_is64;
return IS_ENABLED(CONFIG_X86_64);
extern const bool efi_is64;
return efi_is64;
}
static inline bool efi_is_native(void)
@ -291,6 +294,15 @@ static inline u32 efi64_convert_status(efi_status_t status)
#define __efi64_argmap_allocate_pool(type, size, buffer) \
((type), (size), efi64_zero_upper(buffer))
#define __efi64_argmap_create_event(type, tpl, f, c, event) \
((type), (tpl), (f), (c), efi64_zero_upper(event))
#define __efi64_argmap_set_timer(event, type, time) \
((event), (type), lower_32_bits(time), upper_32_bits(time))
#define __efi64_argmap_wait_for_event(num, event, index) \
((num), (event), efi64_zero_upper(index))
#define __efi64_argmap_handle_protocol(handle, protocol, interface) \
((handle), (protocol), efi64_zero_upper(interface))
@ -356,6 +368,15 @@ static inline u32 efi64_convert_status(efi_status_t status)
runtime), \
func, __VA_ARGS__))
#else /* CONFIG_EFI_MIXED */
static inline bool efi_is_64bit(void)
{
return IS_ENABLED(CONFIG_X86_64);
}
#endif /* CONFIG_EFI_MIXED */
extern bool efi_reboot_required(void);
extern bool efi_is_table_address(unsigned long phys_addr);

2
arch/x86/xen/efi.c
View file

@ -29,7 +29,7 @@ static efi_system_table_t efi_systab_xen __initdata = {
.fw_vendor = EFI_INVALID_TABLE_ADDR, /* Initialized later. */
.fw_revision = 0, /* Initialized later. */
.con_in_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.con_in = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.con_in = NULL, /* Not used under Xen. */
.con_out_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */
.con_out = NULL, /* Not used under Xen. */
.stderr_handle = EFI_INVALID_TABLE_ADDR, /* Not used under Xen. */

4
drivers/firmware/efi/efivars.c
View file

@ -522,8 +522,10 @@ efivar_create_sysfs_entry(struct efivar_entry *new_var)
ret = kobject_init_and_add(&new_var->kobj, &efivar_ktype,
NULL, "%s", short_name);
kfree(short_name);
if (ret)
if (ret) {
kobject_put(&new_var->kobj);
return ret;
}
kobject_uevent(&new_var->kobj, KOBJ_ADD);
if (efivar_entry_add(new_var, &efivar_sysfs_list)) {

7
drivers/firmware/efi/libstub/Makefile
View file

@ -7,7 +7,7 @@
#
cflags-$(CONFIG_X86_32) := -march=i386
cflags-$(CONFIG_X86_64) := -mcmodel=small
cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ -O2 \
cflags-$(CONFIG_X86) += -m$(BITS) -D__KERNEL__ \
-fPIC -fno-strict-aliasing -mno-red-zone \
-mno-mmx -mno-sse -fshort-wchar \
-Wno-pointer-sign \
@ -25,11 +25,12 @@ cflags-$(CONFIG_ARM) := $(subst $(CC_FLAGS_FTRACE),,$(KBUILD_CFLAGS)) \
cflags-$(CONFIG_EFI_GENERIC_STUB) += -I$(srctree)/scripts/dtc/libfdt
KBUILD_CFLAGS := $(cflags-y) -DDISABLE_BRANCH_PROFILING \
KBUILD_CFLAGS := $(cflags-y) -Os -DDISABLE_BRANCH_PROFILING \
-include $(srctree)/drivers/firmware/efi/libstub/hidden.h \
-D__NO_FORTIFY \
$(call cc-option,-ffreestanding) \
$(call cc-option,-fno-stack-protector) \
$(call cc-option,-fno-addrsig) \
-D__DISABLE_EXPORTS
GCOV_PROFILE := n
@ -43,7 +44,7 @@ KCOV_INSTRUMENT := n
lib-y := efi-stub-helper.o gop.o secureboot.o tpm.o \
file.o mem.o random.o randomalloc.o pci.o \
skip_spaces.o lib-cmdline.o lib-ctype.o \
alignedmem.o relocate.o
alignedmem.o relocate.o vsprintf.o
# include the stub's generic dependencies from lib/ when building for ARM/arm64
efi-deps-y := fdt_rw.c fdt_ro.c fdt_wip.c fdt.c fdt_empty_tree.c fdt_sw.c

12
drivers/firmware/efi/libstub/arm32-stub.c
View file

@ -18,7 +18,7 @@ efi_status_t check_platform_features(void)
/* LPAE kernels need compatible hardware */
block = cpuid_feature_extract(CPUID_EXT_MMFR0, 0);
if (block < 5) {
pr_efi_err("This LPAE kernel is not supported by your CPU\n");
efi_err("This LPAE kernel is not supported by your CPU\n");
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
@ -120,7 +120,7 @@ static efi_status_t reserve_kernel_base(unsigned long dram_base,
*/
status = efi_get_memory_map(&map);
if (status != EFI_SUCCESS) {
pr_efi_err("reserve_kernel_base(): Unable to retrieve memory map.\n");
efi_err("reserve_kernel_base(): Unable to retrieve memory map.\n");
return status;
}
@ -162,7 +162,7 @@ static efi_status_t reserve_kernel_base(unsigned long dram_base,
(end - start) / EFI_PAGE_SIZE,
&start);
if (status != EFI_SUCCESS) {
pr_efi_err("reserve_kernel_base(): alloc failed.\n");
efi_err("reserve_kernel_base(): alloc failed.\n");
goto out;
}
break;
@ -219,7 +219,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
status = reserve_kernel_base(kernel_base, reserve_addr, reserve_size);
if (status != EFI_SUCCESS) {
pr_efi_err("Unable to allocate memory for uncompressed kernel.\n");
efi_err("Unable to allocate memory for uncompressed kernel.\n");
return status;
}
@ -232,7 +232,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
status = efi_relocate_kernel(image_addr, *image_size, *image_size,
kernel_base + MAX_UNCOMP_KERNEL_SIZE, 0, 0);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to relocate kernel.\n");
efi_err("Failed to relocate kernel.\n");
efi_free(*reserve_size, *reserve_addr);
*reserve_size = 0;
return status;
@ -244,7 +244,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
* address at which the zImage is loaded.
*/
if (*image_addr + *image_size > dram_base + ZIMAGE_OFFSET_LIMIT) {
pr_efi_err("Failed to relocate kernel, no low memory available.\n");
efi_err("Failed to relocate kernel, no low memory available.\n");
efi_free(*reserve_size, *reserve_addr);
*reserve_size = 0;
efi_free(*image_size, *image_addr);

14
drivers/firmware/efi/libstub/arm64-stub.c
View file

@ -26,9 +26,9 @@ efi_status_t check_platform_features(void)
tg = (read_cpuid(ID_AA64MMFR0_EL1) >> ID_AA64MMFR0_TGRAN_SHIFT) & 0xf;
if (tg != ID_AA64MMFR0_TGRAN_SUPPORTED) {
if (IS_ENABLED(CONFIG_ARM64_64K_PAGES))
pr_efi_err("This 64 KB granular kernel is not supported by your CPU\n");
efi_err("This 64 KB granular kernel is not supported by your CPU\n");
else
pr_efi_err("This 16 KB granular kernel is not supported by your CPU\n");
efi_err("This 16 KB granular kernel is not supported by your CPU\n");
return EFI_UNSUPPORTED;
}
return EFI_SUCCESS;
@ -59,18 +59,18 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
status = efi_get_random_bytes(sizeof(phys_seed),
(u8 *)&phys_seed);
if (status == EFI_NOT_FOUND) {
pr_efi("EFI_RNG_PROTOCOL unavailable, no randomness supplied\n");
efi_info("EFI_RNG_PROTOCOL unavailable, no randomness supplied\n");
} else if (status != EFI_SUCCESS) {
pr_efi_err("efi_get_random_bytes() failed\n");
efi_err("efi_get_random_bytes() failed\n");
return status;
}
} else {
pr_efi("KASLR disabled on kernel command line\n");
efi_info("KASLR disabled on kernel command line\n");
}
}
if (image->image_base != _text)
pr_efi_err("FIRMWARE BUG: efi_loaded_image_t::image_base has bogus value\n");
efi_err("FIRMWARE BUG: efi_loaded_image_t::image_base has bogus value\n");
kernel_size = _edata - _text;
kernel_memsize = kernel_size + (_end - _edata);
@ -102,7 +102,7 @@ efi_status_t handle_kernel_image(unsigned long *image_addr,
ULONG_MAX, min_kimg_align);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to relocate kernel\n");
efi_err("Failed to relocate kernel\n");
*reserve_size = 0;
return status;
}

350
drivers/firmware/efi/libstub/efi-stub-helper.c
View file

@ -7,15 +7,21 @@
* Copyright 2011 Intel Corporation; author Matt Fleming
*/
#include <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>
#include "efistub.h"
bool efi_nochunk;
bool efi_nokaslr;
bool efi_noinitrd;
bool efi_quiet;
int efi_loglevel = CONSOLE_LOGLEVEL_DEFAULT;
bool efi_novamap;
static bool efi_nosoftreserve;
@ -26,21 +32,126 @@ bool __pure __efi_soft_reserve_enabled(void)
return !efi_nosoftreserve;
}
void efi_printk(char *str)
void efi_char16_puts(efi_char16_t *str)
{
char *s8;
efi_call_proto(efi_table_attr(efi_system_table, con_out),
output_string, str);
}
for (s8 = str; *s8; s8++) {
efi_char16_t ch[2] = { 0 };
static
u32 utf8_to_utf32(const u8 **s8)
{
u32 c32;
u8 c0, cx;
size_t clen, i;
ch[0] = *s8;
if (*s8 == '\n') {
efi_char16_t nl[2] = { '\r', 0 };
efi_char16_printk(nl);
}
efi_char16_printk(ch);
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;
}
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;
}
}
}
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;
}
/*
@ -71,7 +182,7 @@ efi_status_t efi_parse_options(char const *cmdline)
if (!strcmp(param, "nokaslr")) {
efi_nokaslr = true;
} else if (!strcmp(param, "quiet")) {
efi_quiet = true;
efi_loglevel = CONSOLE_LOGLEVEL_QUIET;
} else if (!strcmp(param, "noinitrd")) {
efi_noinitrd = true;
} else if (!strcmp(param, "efi") && val) {
@ -85,6 +196,8 @@ efi_status_t efi_parse_options(char const *cmdline)
efi_disable_pci_dma = true;
if (parse_option_str(val, "no_disable_early_pci_dma"))
efi_disable_pci_dma = false;
if (parse_option_str(val, "debug"))
efi_loglevel = CONSOLE_LOGLEVEL_DEBUG;
} else if (!strcmp(param, "video") &&
val && strstarts(val, "efifb:")) {
efi_parse_option_graphics(val + strlen("efifb:"));
@ -94,98 +207,80 @@ efi_status_t efi_parse_options(char const *cmdline)
return EFI_SUCCESS;
}
/*
* Get the number of UTF-8 bytes corresponding to an UTF-16 character.
* This overestimates for surrogates, but that is okay.
*/
static int efi_utf8_bytes(u16 c)
{
return 1 + (c >= 0x80) + (c >= 0x800);
}
/*
* Convert an UTF-16 string, not necessarily null terminated, to UTF-8.
*/
static u8 *efi_utf16_to_utf8(u8 *dst, const u16 *src, int n)
{
unsigned int c;
while (n--) {
c = *src++;
if (n && c >= 0xd800 && c <= 0xdbff &&
*src >= 0xdc00 && *src <= 0xdfff) {
c = 0x10000 + ((c & 0x3ff) << 10) + (*src & 0x3ff);
src++;
n--;
}
if (c >= 0xd800 && c <= 0xdfff)
c = 0xfffd; /* Unmatched surrogate */
if (c < 0x80) {
*dst++ = c;
continue;
}
if (c < 0x800) {
*dst++ = 0xc0 + (c >> 6);
goto t1;
}
if (c < 0x10000) {
*dst++ = 0xe0 + (c >> 12);
goto t2;
}
*dst++ = 0xf0 + (c >> 18);
*dst++ = 0x80 + ((c >> 12) & 0x3f);
t2:
*dst++ = 0x80 + ((c >> 6) & 0x3f);
t1:
*dst++ = 0x80 + (c & 0x3f);
}
return dst;
}
/*
* Convert the unicode UEFI command line to ASCII to pass to kernel.
* 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;
u8 *s1 = NULL;
unsigned long cmdline_addr = 0;
int load_options_chars = efi_table_attr(image, load_options_size) / 2;
int options_chars = efi_table_attr(image, load_options_size) / 2;
const u16 *options = efi_table_attr(image, load_options);
int options_bytes = 0; /* UTF-8 bytes */
int options_chars = 0; /* UTF-16 chars */
int options_bytes = 0, safe_options_bytes = 0; /* UTF-8 bytes */
bool in_quote = false;
efi_status_t status;
u16 zero = 0;
if (options) {
s2 = options;
while (*s2 && *s2 != '\n'
&& options_chars < load_options_chars) {
options_bytes += efi_utf8_bytes(*s2++);
options_chars++;
}
}
while (options_bytes < COMMAND_LINE_SIZE && options_chars--) {
u16 c = *s2++;
if (!options_chars) {
/* No command line options, so return empty string*/
options = &zero;
if (c < 0x80) {
if (c == L'\0' || c == L'\n')
break;
if (c == L'"')
in_quote = !in_quote;
else if (!in_quote && isspace((char)c))
safe_options_bytes = options_bytes;
options_bytes++;
continue;
}
/*
* Get the number of UTF-8 bytes corresponding to a
* UTF-16 character.
* The first part handles everything in the BMP.
*/
options_bytes += 2 + (c >= 0x800);
/*
* Add one more byte for valid surrogate pairs. Invalid
* surrogates will be replaced with 0xfffd and take up
* only 3 bytes.
*/
if ((c & 0xfc00) == 0xd800) {
/*
* If the very last word is a high surrogate,
* we must ignore it since we can't access the
* low surrogate.
*/
if (!options_chars) {
options_bytes -= 3;
} else if ((*s2 & 0xfc00) == 0xdc00) {
options_bytes++;
options_chars--;
s2++;
}
}
}
if (options_bytes >= COMMAND_LINE_SIZE) {
options_bytes = safe_options_bytes;
efi_err("Command line is too long: truncated to %d bytes\n",
options_bytes);
}
}
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;
s1 = (u8 *)cmdline_addr;
s2 = (const u16 *)options;
s1 = efi_utf16_to_utf8(s1, s2, options_chars);
*s1 = '\0';
snprintf((char *)cmdline_addr, options_bytes, "%.*ls",
options_bytes - 1, options);
*cmd_line_len = options_bytes;
return (char *)cmdline_addr;
@ -284,12 +379,6 @@ void *get_efi_config_table(efi_guid_t guid)
return NULL;
}
void efi_char16_printk(efi_char16_t *str)
{
efi_call_proto(efi_table_attr(efi_system_table, con_out),
output_string, str);
}
/*
* The LINUX_EFI_INITRD_MEDIA_GUID vendor media device path below provides a way
* for the firmware or bootloader to expose the initrd data directly to the stub
@ -331,6 +420,7 @@ static const struct {
* %EFI_OUT_OF_RESOURCES if memory allocation failed
* %EFI_LOAD_ERROR in all other cases
*/
static
efi_status_t efi_load_initrd_dev_path(unsigned long *load_addr,
unsigned long *load_size,
unsigned long max)
@ -343,9 +433,6 @@ efi_status_t efi_load_initrd_dev_path(unsigned long *load_addr,
efi_handle_t handle;
efi_status_t status;
if (!load_addr || !load_size)
return EFI_INVALID_PARAMETER;
dp = (efi_device_path_protocol_t *)&initrd_dev_path;
status = efi_bs_call(locate_device_path, &lf2_proto_guid, &dp, &handle);
if (status != EFI_SUCCESS)
@ -375,3 +462,80 @@ efi_status_t efi_load_initrd_dev_path(unsigned long *load_addr,
*load_size = initrd_size;
return EFI_SUCCESS;
}
static
efi_status_t efi_load_initrd_cmdline(efi_loaded_image_t *image,
unsigned long *load_addr,
unsigned long *load_size,
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))) {
*load_addr = *load_size = 0;
return EFI_SUCCESS;
}
return handle_cmdline_files(image, L"initrd=", sizeof(L"initrd=") - 2,
soft_limit, hard_limit,
load_addr, load_size);
}
efi_status_t efi_load_initrd(efi_loaded_image_t *image,
unsigned long *load_addr,
unsigned long *load_size,
unsigned long soft_limit,
unsigned long hard_limit)
{
efi_status_t status;
if (!load_addr || !load_size)
return EFI_INVALID_PARAMETER;
status = efi_load_initrd_dev_path(load_addr, load_size, hard_limit);
if (status == EFI_SUCCESS) {
efi_info("Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path\n");
} else if (status == EFI_NOT_FOUND) {
status = efi_load_initrd_cmdline(image, load_addr, load_size,
soft_limit, hard_limit);
if (status == EFI_SUCCESS && *load_size > 0)
efi_info("Loaded initrd from command line option\n");
}
return status;
}
efi_status_t efi_wait_for_key(unsigned long usec, efi_input_key_t *key)
{
efi_event_t events[2], timer;
unsigned long index;
efi_simple_text_input_protocol_t *con_in;
efi_status_t status;
con_in = efi_table_attr(efi_system_table, con_in);
if (!con_in)
return EFI_UNSUPPORTED;
efi_set_event_at(events, 0, efi_table_attr(con_in, wait_for_key));
status = efi_bs_call(create_event, EFI_EVT_TIMER, 0, NULL, NULL, &timer);
if (status != EFI_SUCCESS)
return status;
status = efi_bs_call(set_timer, timer, EfiTimerRelative,
EFI_100NSEC_PER_USEC * usec);
if (status != EFI_SUCCESS)
return status;
efi_set_event_at(events, 1, timer);
status = efi_bs_call(wait_for_event, 2, events, &index);
if (status == EFI_SUCCESS) {
if (index == 0)
status = efi_call_proto(con_in, read_keystroke, key);
else
status = EFI_TIMEOUT;
}
efi_bs_call(close_event, timer);
return status;
}

70
drivers/firmware/efi/libstub/efi-stub.c
View file

@ -73,7 +73,7 @@ static void install_memreserve_table(void)
status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, sizeof(*rsv),
(void **)&rsv);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to allocate memreserve entry!\n");
efi_err("Failed to allocate memreserve entry!\n");
return;
}
@ -84,7 +84,7 @@ static void install_memreserve_table(void)
status = efi_bs_call(install_configuration_table,
&memreserve_table_guid, rsv);
if (status != EFI_SUCCESS)
pr_efi_err("Failed to install memreserve config table!\n");
efi_err("Failed to install memreserve config table!\n");
}
static unsigned long get_dram_base(void)
@ -144,7 +144,8 @@ asmlinkage void __noreturn efi_enter_kernel(unsigned long entrypoint,
* for both archictectures, with the arch-specific code provided in the
* handle_kernel_image() function.
*/
efi_status_t efi_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg)
efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
efi_system_table_t *sys_table_arg)
{
efi_loaded_image_t *image;
efi_status_t status;
@ -186,13 +187,13 @@ efi_status_t efi_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg)
status = efi_system_table->boottime->handle_protocol(handle,
&loaded_image_proto, (void *)&image);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to get loaded image protocol\n");
efi_err("Failed to get loaded image protocol\n");
goto fail;
}
dram_base = get_dram_base();
if (dram_base == EFI_ERROR) {
pr_efi_err("Failed to find DRAM base\n");
efi_err("Failed to find DRAM base\n");
status = EFI_LOAD_ERROR;
goto fail;
}
@ -202,22 +203,32 @@ 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) {
pr_efi_err("getting command line via LOADED_IMAGE_PROTOCOL\n");
efi_err("getting command line via LOADED_IMAGE_PROTOCOL\n");
status = EFI_OUT_OF_RESOURCES;
goto fail;
}
if (IS_ENABLED(CONFIG_CMDLINE_EXTEND) ||
IS_ENABLED(CONFIG_CMDLINE_FORCE) ||
cmdline_size == 0)
efi_parse_options(CONFIG_CMDLINE);
cmdline_size == 0) {
status = efi_parse_options(CONFIG_CMDLINE);
if (status != EFI_SUCCESS) {
efi_err("Failed to parse options\n");
goto fail_free_cmdline;
}
}
if (!IS_ENABLED(CONFIG_CMDLINE_FORCE) && cmdline_size > 0)
efi_parse_options(cmdline_ptr);
if (!IS_ENABLED(CONFIG_CMDLINE_FORCE) && cmdline_size > 0) {
status = efi_parse_options(cmdline_ptr);
if (status != EFI_SUCCESS) {
efi_err("Failed to parse options\n");
goto fail_free_cmdline;
}
}
pr_efi("Booting Linux Kernel...\n");
efi_info("Booting Linux Kernel...\n");
si = setup_graphics();
@ -226,8 +237,8 @@ efi_status_t efi_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg)
&reserve_size,
dram_base, image);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to relocate kernel\n");
goto fail_free_cmdline;
efi_err("Failed to relocate kernel\n");
goto fail_free_screeninfo;
}
efi_retrieve_tpm2_eventlog();
@ -245,42 +256,34 @@ efi_status_t efi_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg)
if (!IS_ENABLED(CONFIG_EFI_ARMSTUB_DTB_LOADER) ||
secure_boot != efi_secureboot_mode_disabled) {
if (strstr(cmdline_ptr, "dtb="))
pr_efi("Ignoring DTB from command line.\n");
efi_err("Ignoring DTB from command line.\n");
} else {
status = efi_load_dtb(image, &fdt_addr, &fdt_size);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to load device tree!\n");
efi_err("Failed to load device tree!\n");
goto fail_free_image;
}
}
if (fdt_addr) {
pr_efi("Using DTB from command line\n");
efi_info("Using DTB from command line\n");
} else {
/* Look for a device tree configuration table entry. */
fdt_addr = (uintptr_t)get_fdt(&fdt_size);
if (fdt_addr)
pr_efi("Using DTB from configuration table\n");
efi_info("Using DTB from configuration table\n");
}
if (!fdt_addr)
pr_efi("Generating empty DTB\n");
efi_info("Generating empty DTB\n");
if (!efi_noinitrd) {
max_addr = efi_get_max_initrd_addr(dram_base, image_addr);
status = efi_load_initrd_dev_path(&initrd_addr, &initrd_size,
max_addr);
if (status == EFI_SUCCESS) {
pr_efi("Loaded initrd from LINUX_EFI_INITRD_MEDIA_GUID device path\n");
} else if (status == EFI_NOT_FOUND) {
status = efi_load_initrd(image, &initrd_addr, &initrd_size,
ULONG_MAX, max_addr);
if (status == EFI_SUCCESS && initrd_size > 0)
pr_efi("Loaded initrd from command line option\n");
}
status = efi_load_initrd(image, &initrd_addr, &initrd_size,
ULONG_MAX, max_addr);
if (status != EFI_SUCCESS)
pr_efi_err("Failed to load initrd!\n");
efi_err("Failed to load initrd!\n");
}
efi_random_get_seed();
@ -330,7 +333,7 @@ efi_status_t efi_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg)
/* not reached */
fail_free_initrd:
pr_efi_err("Failed to update FDT and exit boot services\n");
efi_err("Failed to update FDT and exit boot services\n");
efi_free(initrd_size, initrd_addr);
efi_free(fdt_size, fdt_addr);
@ -338,9 +341,10 @@ efi_status_t efi_entry(efi_handle_t handle, efi_system_table_t *sys_table_arg)
fail_free_image:
efi_free(image_size, image_addr);
efi_free(reserve_size, reserve_addr);
fail_free_cmdline:
fail_free_screeninfo:
free_screen_info(si);
efi_free(cmdline_size, (unsigned long)cmdline_ptr);
fail_free_cmdline:
efi_bs_call(free_pool, cmdline_ptr);
fail:
return status;
}

157
drivers/firmware/efi/libstub/efistub.h
View file

@ -3,6 +3,13 @@
#ifndef _DRIVERS_FIRMWARE_EFI_EFISTUB_H
#define _DRIVERS_FIRMWARE_EFI_EFISTUB_H
#include <linux/compiler.h>
#include <linux/efi.h>
#include <linux/kernel.h>
#include <linux/kern_levels.h>
#include <linux/types.h>
#include <asm/efi.h>
/* error code which can't be mistaken for valid address */
#define EFI_ERROR (~0UL)
@ -28,32 +35,30 @@
extern bool efi_nochunk;
extern bool efi_nokaslr;
extern bool efi_noinitrd;
extern bool efi_quiet;
extern int efi_loglevel;
extern bool efi_novamap;
extern const efi_system_table_t *efi_system_table;
#ifndef efi_bs_call
#define efi_bs_call(func, ...) efi_system_table->boottime->func(__VA_ARGS__)
#endif
#ifndef efi_rt_call
#define efi_rt_call(func, ...) efi_system_table->runtime->func(__VA_ARGS__)
#endif
#ifndef efi_is_native
efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
efi_system_table_t *sys_table_arg);
#ifndef ARCH_HAS_EFISTUB_WRAPPERS
#define efi_is_native() (true)
#endif
#ifndef efi_table_attr
#define efi_bs_call(func, ...) efi_system_table->boottime->func(__VA_ARGS__)
#define efi_rt_call(func, ...) efi_system_table->runtime->func(__VA_ARGS__)
#define efi_table_attr(inst, attr) (inst->attr)
#endif
#ifndef efi_call_proto
#define efi_call_proto(inst, func, ...) inst->func(inst, ##__VA_ARGS__)
#endif
#define pr_efi(msg) do { \
if (!efi_quiet) efi_printk("EFI stub: "msg); \
} while (0)
#define pr_efi_err(msg) efi_printk("EFI stub: ERROR: "msg)
#define efi_info(fmt, ...) \
efi_printk(KERN_INFO fmt, ##__VA_ARGS__)
#define efi_err(fmt, ...) \
efi_printk(KERN_ERR "ERROR: " fmt, ##__VA_ARGS__)
#define efi_debug(fmt, ...) \
efi_printk(KERN_DEBUG "DEBUG: " fmt, ##__VA_ARGS__)
/* Helper macros for the usual case of using simple C variables: */
#ifndef fdt_setprop_inplace_var
@ -87,6 +92,13 @@ extern const efi_system_table_t *efi_system_table;
((handle = efi_get_handle_at((array), i)) || true); \
i++)
static inline
void efi_set_u64_split(u64 data, u32 *lo, u32 *hi)
{
*lo = lower_32_bits(data);
*hi = upper_32_bits(data);
}
/*
* Allocation types for calls to boottime->allocate_pages.
*/
@ -102,6 +114,16 @@ extern const efi_system_table_t *efi_system_table;
#define EFI_LOCATE_BY_REGISTER_NOTIFY 1
#define EFI_LOCATE_BY_PROTOCOL 2
/*
* boottime->stall takes the time period in microseconds
*/
#define EFI_USEC_PER_SEC 1000000
/*
* boottime->set_timer takes the time in 100ns units
*/
#define EFI_100NSEC_PER_USEC ((u64)10)
/*
* An efi_boot_memmap is used by efi_get_memory_map() to return the
* EFI memory map in a dynamically allocated buffer.
@ -126,6 +148,39 @@ struct efi_boot_memmap {
typedef struct efi_generic_dev_path efi_device_path_protocol_t;
typedef void *efi_event_t;
/* Note that notifications won't work in mixed mode */
typedef void (__efiapi *efi_event_notify_t)(efi_event_t, void *);
#define EFI_EVT_TIMER 0x80000000U
#define EFI_EVT_RUNTIME 0x40000000U
#define EFI_EVT_NOTIFY_WAIT 0x00000100U
#define EFI_EVT_NOTIFY_SIGNAL 0x00000200U
/*
* boottime->wait_for_event takes an array of events as input.
* Provide a helper to set it up correctly for mixed mode.
*/
static inline
void efi_set_event_at(efi_event_t *events, size_t idx, efi_event_t event)
{
if (efi_is_native())
events[idx] = event;
else
((u32 *)events)[idx] = (u32)(unsigned long)event;
}
#define EFI_TPL_APPLICATION 4
#define EFI_TPL_CALLBACK 8
#define EFI_TPL_NOTIFY 16
#define EFI_TPL_HIGH_LEVEL 31
typedef enum {
EfiTimerCancel,
EfiTimerPeriodic,
EfiTimerRelative
} EFI_TIMER_DELAY;
/*
* EFI Boot Services table
*/
@ -144,11 +199,16 @@ union efi_boot_services {
efi_status_t (__efiapi *allocate_pool)(int, unsigned long,
void **);
efi_status_t (__efiapi *free_pool)(void *);
void *create_event;
void *set_timer;
void *wait_for_event;
efi_status_t (__efiapi *create_event)(u32, unsigned long,
efi_event_notify_t, void *,
efi_event_t *);
efi_status_t (__efiapi *set_timer)(efi_event_t,
EFI_TIMER_DELAY, u64);
efi_status_t (__efiapi *wait_for_event)(unsigned long,
efi_event_t *,
unsigned long *);
void *signal_event;
void *close_event;
efi_status_t (__efiapi *close_event)(efi_event_t);
void *check_event;
void *install_protocol_interface;
void *reinstall_protocol_interface;
@ -175,7 +235,7 @@ union efi_boot_services {
efi_status_t (__efiapi *exit_boot_services)(efi_handle_t,
unsigned long);
void *get_next_monotonic_count;
void *stall;
efi_status_t (__efiapi *stall)(unsigned long);
void *set_watchdog_timer;
void *connect_controller;
efi_status_t (__efiapi *disconnect_controller)(efi_handle_t,
@ -260,6 +320,27 @@ union efi_uga_draw_protocol {
} mixed_mode;
};
typedef struct {
u16 scan_code;
efi_char16_t unicode_char;
} efi_input_key_t;
union efi_simple_text_input_protocol {
struct {
void *reset;
efi_status_t (__efiapi *read_keystroke)(efi_simple_text_input_protocol_t *,
efi_input_key_t *);
efi_event_t wait_for_key;
};
struct {
u32 reset;
u32 read_keystroke;
u32 wait_for_key;
} mixed_mode;
};
efi_status_t efi_wait_for_key(unsigned long usec, efi_input_key_t *key);
union efi_simple_text_output_protocol {
struct {
void *reset;
@ -612,8 +693,6 @@ efi_status_t efi_exit_boot_services(void *handle,
void *priv,
efi_exit_boot_map_processing priv_func);
void efi_char16_printk(efi_char16_t *);
efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
unsigned long *new_fdt_addr,
unsigned long max_addr,
@ -637,12 +716,15 @@ efi_status_t check_platform_features(void);
void *get_efi_config_table(efi_guid_t guid);
void efi_printk(char *str);
/* NOTE: These functions do not print a trailing newline after the string */
void efi_char16_puts(efi_char16_t *);
void efi_puts(const char *str);
__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);
@ -683,21 +765,10 @@ static inline efi_status_t efi_load_dtb(efi_loaded_image_t *image,
ULONG_MAX, ULONG_MAX, load_addr, load_size);
}
static inline efi_status_t efi_load_initrd(efi_loaded_image_t *image,
unsigned long *load_addr,
unsigned long *load_size,
unsigned long soft_limit,
unsigned long hard_limit)
{
if (!IS_ENABLED(CONFIG_EFI_GENERIC_STUB_INITRD_CMDLINE_LOADER))
return EFI_SUCCESS;
return handle_cmdline_files(image, L"initrd=", sizeof(L"initrd=") - 2,
soft_limit, hard_limit, load_addr, load_size);
}
efi_status_t efi_load_initrd_dev_path(unsigned long *load_addr,
unsigned long *load_size,
unsigned long max);
efi_status_t efi_load_initrd(efi_loaded_image_t *image,
unsigned long *load_addr,
unsigned long *load_size,
unsigned long soft_limit,
unsigned long hard_limit);
#endif

16
drivers/firmware/efi/libstub/fdt.c
View file

@ -39,7 +39,7 @@ static efi_status_t update_fdt(void *orig_fdt, unsigned long orig_fdt_size,
/* Do some checks on provided FDT, if it exists: */
if (orig_fdt) {
if (fdt_check_header(orig_fdt)) {
pr_efi_err("Device Tree header not valid!\n");
efi_err("Device Tree header not valid!\n");
return EFI_LOAD_ERROR;
}
/*
@ -47,7 +47,7 @@ static efi_status_t update_fdt(void *orig_fdt, unsigned long orig_fdt_size,
* configuration table:
*/
if (orig_fdt_size && fdt_totalsize(orig_fdt) > orig_fdt_size) {
pr_efi_err("Truncated device tree! foo!\n");
efi_err("Truncated device tree! foo!\n");
return EFI_LOAD_ERROR;
}
}
@ -270,16 +270,16 @@ efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
*/
status = efi_get_memory_map(&map);
if (status != EFI_SUCCESS) {
pr_efi_err("Unable to retrieve UEFI memory map.\n");
efi_err("Unable to retrieve UEFI memory map.\n");
return status;
}
pr_efi("Exiting boot services and installing virtual address map...\n");
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);
if (status != EFI_SUCCESS) {
pr_efi_err("Unable to allocate memory for new device tree.\n");
efi_err("Unable to allocate memory for new device tree.\n");
goto fail;
}
@ -296,7 +296,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
initrd_addr, initrd_size);
if (status != EFI_SUCCESS) {
pr_efi_err("Unable to construct new device tree.\n");
efi_err("Unable to construct new device tree.\n");
goto fail_free_new_fdt;
}
@ -342,7 +342,7 @@ efi_status_t allocate_new_fdt_and_exit_boot(void *handle,
return EFI_SUCCESS;
}
pr_efi_err("Exit boot services failed.\n");
efi_err("Exit boot services failed.\n");
fail_free_new_fdt:
efi_free(MAX_FDT_SIZE, *new_fdt_addr);
@ -363,7 +363,7 @@ void *get_fdt(unsigned long *fdt_size)
return NULL;
if (fdt_check_header(fdt) != 0) {
pr_efi_err("Invalid header detected on UEFI supplied FDT, ignoring ...\n");
efi_err("Invalid header detected on UEFI supplied FDT, ignoring ...\n");
return NULL;
}
*fdt_size = fdt_totalsize(fdt);

14
drivers/firmware/efi/libstub/file.c
View file

@ -46,16 +46,14 @@ static efi_status_t efi_open_file(efi_file_protocol_t *volume,
status = volume->open(volume, &fh, fi->filename, EFI_FILE_MODE_READ, 0);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to open file: ");
efi_char16_printk(fi->filename);
efi_printk("\n");
efi_err("Failed to open file: %ls\n", fi->filename);
return status;
}
info_sz = sizeof(struct finfo);
status = fh->get_info(fh, &info_guid, &info_sz, fi);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to get file info\n");
efi_err("Failed to get file info\n");
fh->close(fh);
return status;
}
@ -75,13 +73,13 @@ static efi_status_t efi_open_volume(efi_loaded_image_t *image,
status = efi_bs_call(handle_protocol, image->device_handle, &fs_proto,
(void **)&io);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to handle fs_proto\n");
efi_err("Failed to handle fs_proto\n");
return status;
}
status = io->open_volume(io, fh);
if (status != EFI_SUCCESS)
pr_efi_err("Failed to open volume\n");
efi_err("Failed to open volume\n");
return status;
}
@ -191,7 +189,7 @@ efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
&alloc_addr,
hard_limit);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to allocate memory for files\n");
efi_err("Failed to allocate memory for files\n");
goto err_close_file;
}
@ -215,7 +213,7 @@ efi_status_t handle_cmdline_files(efi_loaded_image_t *image,
status = file->read(file, &chunksize, addr);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to read file\n");
efi_err("Failed to read file\n");
goto err_close_file;
}
addr += chunksize;

113
drivers/firmware/efi/libstub/gop.c
View file

@ -19,7 +19,8 @@ enum efi_cmdline_option {
EFI_CMDLINE_NONE,
EFI_CMDLINE_MODE_NUM,
EFI_CMDLINE_RES,
EFI_CMDLINE_AUTO
EFI_CMDLINE_AUTO,
EFI_CMDLINE_LIST
};
static struct {
@ -100,6 +101,19 @@ static bool parse_auto(char *option, char **next)
return true;
}
static bool parse_list(char *option, char **next)
{
if (!strstarts(option, "list"))
return false;
option += strlen("list");
if (*option && *option++ != ',')
return false;
cmdline.option = EFI_CMDLINE_LIST;
*next = option;
return true;
}
void efi_parse_option_graphics(char *option)
{
while (*option) {
@ -109,6 +123,8 @@ void efi_parse_option_graphics(char *option)
continue;
if (parse_auto(option, &option))
continue;
if (parse_list(option, &option))
continue;
while (*option && *option++ != ',')
;
@ -134,14 +150,14 @@ static u32 choose_mode_modenum(efi_graphics_output_protocol_t *gop)
max_mode = efi_table_attr(mode, max_mode);
if (cmdline.mode >= max_mode) {
efi_printk("Requested mode is invalid\n");
efi_err("Requested mode is invalid\n");
return cur_mode;
}
status = efi_call_proto(gop, query_mode, cmdline.mode,
&info_size, &info);
if (status != EFI_SUCCESS) {
efi_printk("Couldn't get mode information\n");
efi_err("Couldn't get mode information\n");
return cur_mode;
}
@ -150,7 +166,7 @@ static u32 choose_mode_modenum(efi_graphics_output_protocol_t *gop)
efi_bs_call(free_pool, info);
if (pf == PIXEL_BLT_ONLY || pf >= PIXEL_FORMAT_MAX) {
efi_printk("Invalid PixelFormat\n");
efi_err("Invalid PixelFormat\n");
return cur_mode;
}
@ -222,7 +238,7 @@ static u32 choose_mode_res(efi_graphics_output_protocol_t *gop)
return m;
}
efi_printk("Couldn't find requested mode\n");
efi_err("Couldn't find requested mode\n");
return cur_mode;
}
@ -290,6 +306,82 @@ static u32 choose_mode_auto(efi_graphics_output_protocol_t *gop)
return best_mode;
}
static u32 choose_mode_list(efi_graphics_output_protocol_t *gop)
{
efi_status_t status;
efi_graphics_output_protocol_mode_t *mode;
efi_graphics_output_mode_info_t *info;
unsigned long info_size;
u32 max_mode, cur_mode;
int pf;
efi_pixel_bitmask_t pi;
u32 m, w, h;
u8 d;
const char *dstr;
bool valid;
efi_input_key_t key;
mode = efi_table_attr(gop, mode);
cur_mode = efi_table_attr(mode, mode);
max_mode = efi_table_attr(mode, max_mode);
efi_printk("Available graphics modes are 0-%u\n", max_mode-1);
efi_puts(" * = current mode\n"
" - = unusable mode\n");
for (m = 0; m < max_mode; m++) {
status = efi_call_proto(gop, query_mode, m,
&info_size, &info);
if (status != EFI_SUCCESS)
continue;
pf = info->pixel_format;
pi = info->pixel_information;
w = info->horizontal_resolution;
h = info->vertical_resolution;
efi_bs_call(free_pool, info);
valid = !(pf == PIXEL_BLT_ONLY || pf >= PIXEL_FORMAT_MAX);
d = 0;
switch (pf) {
case PIXEL_RGB_RESERVED_8BIT_PER_COLOR:
dstr = "rgb";
break;
case PIXEL_BGR_RESERVED_8BIT_PER_COLOR:
dstr = "bgr";
break;
case PIXEL_BIT_MASK:
dstr = "";
d = pixel_bpp(pf, pi);
break;
case PIXEL_BLT_ONLY:
dstr = "blt";
break;
default:
dstr = "xxx";
break;
}
efi_printk("Mode %3u %c%c: Resolution %ux%u-%s%.0hhu\n",
m,
m == cur_mode ? '*' : ' ',
!valid ? '-' : ' ',
w, h, dstr, d);
}
efi_puts("\nPress any key to continue (or wait 10 seconds)\n");
status = efi_wait_for_key(10 * EFI_USEC_PER_SEC, &key);
if (status != EFI_SUCCESS && status != EFI_TIMEOUT) {
efi_err("Unable to read key, continuing in 10 seconds\n");
efi_bs_call(stall, 10 * EFI_USEC_PER_SEC);
}
return cur_mode;
}
static void set_mode(efi_graphics_output_protocol_t *gop)
{
efi_graphics_output_protocol_mode_t *mode;
@ -305,6 +397,9 @@ static void set_mode(efi_graphics_output_protocol_t *gop)
case EFI_CMDLINE_AUTO:
new_mode = choose_mode_auto(gop);
break;
case EFI_CMDLINE_LIST:
new_mode = choose_mode_list(gop);
break;
default:
return;
}
@ -316,7 +411,7 @@ static void set_mode(efi_graphics_output_protocol_t *gop)
return;
if (efi_call_proto(gop, set_mode, new_mode) != EFI_SUCCESS)
efi_printk("Failed to set requested mode\n");
efi_err("Failed to set requested mode\n");
}
static void find_bits(u32 mask, u8 *pos, u8 *size)
@ -422,7 +517,6 @@ static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
efi_graphics_output_protocol_t *gop;
efi_graphics_output_protocol_mode_t *mode;
efi_graphics_output_mode_info_t *info;
efi_physical_addr_t fb_base;
gop = find_gop(proto, size, handles);
@ -442,9 +536,8 @@ static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto,
si->lfb_width = info->horizontal_resolution;
si->lfb_height = info->vertical_resolution;
fb_base = efi_table_attr(mode, frame_buffer_base);
si->lfb_base = lower_32_bits(fb_base);
si->ext_lfb_base = upper_32_bits(fb_base);
efi_set_u64_split(efi_table_attr(mode, frame_buffer_base),
&si->lfb_base, &si->ext_lfb_base);
if (si->ext_lfb_base)
si->capabilities |= VIDEO_CAPABILITY_64BIT_BASE;

10
drivers/firmware/efi/libstub/pci.c
View file

@ -28,21 +28,21 @@ void efi_pci_disable_bridge_busmaster(void)
if (status != EFI_BUFFER_TOO_SMALL) {
if (status != EFI_SUCCESS && status != EFI_NOT_FOUND)
pr_efi_err("Failed to locate PCI I/O handles'\n");
efi_err("Failed to locate PCI I/O handles'\n");
return;
}
status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, pci_handle_size,
(void **)&pci_handle);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to allocate memory for 'pci_handle'\n");
efi_err("Failed to allocate memory for 'pci_handle'\n");
return;
}
status = efi_bs_call(locate_handle, EFI_LOCATE_BY_PROTOCOL, &pci_proto,
NULL, &pci_handle_size, pci_handle);
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to locate PCI I/O handles'\n");
efi_err("Failed to locate PCI I/O handles'\n");
goto free_handle;
}
@ -69,7 +69,7 @@ void efi_pci_disable_bridge_busmaster(void)
* access to the framebuffer. Drivers for true PCIe graphics
* controllers that are behind a PCIe root port do not use
* DMA to implement the GOP framebuffer anyway [although they
* may use it in their implentation of Gop->Blt()], and so
* may use it in their implementation of Gop->Blt()], and so
* disabling DMA in the PCI bridge should not interfere with
* normal operation of the device.
*/
@ -106,7 +106,7 @@ void efi_pci_disable_bridge_busmaster(void)
status = efi_call_proto(pci, pci.write, EfiPciIoWidthUint16,
PCI_COMMAND, 1, &command);
if (status != EFI_SUCCESS)
pr_efi_err("Failed to disable PCI busmastering\n");
efi_err("Failed to disable PCI busmastering\n");
}
free_handle:

4
drivers/firmware/efi/libstub/relocate.c
View file

@ -140,7 +140,7 @@ efi_status_t efi_relocate_kernel(unsigned long *image_addr,
* The EFI firmware loader could have placed the kernel image
* anywhere in memory, but the kernel has restrictions on the
* max physical address it can run at. Some architectures
* also have a prefered address, so first try to relocate
* also have a preferred address, so first try to relocate
* to the preferred address. If that fails, allocate as low
* as possible while respecting the required alignment.
*/
@ -157,7 +157,7 @@ efi_status_t efi_relocate_kernel(unsigned long *image_addr,
min_addr);
}
if (status != EFI_SUCCESS) {
pr_efi_err("Failed to allocate usable memory for kernel.\n");
efi_err("Failed to allocate usable memory for kernel.\n");
return status;
}

4
drivers/firmware/efi/libstub/secureboot.c
View file

@ -67,10 +67,10 @@ enum efi_secureboot_mode efi_get_secureboot(void)
return efi_secureboot_mode_disabled;
secure_boot_enabled:
pr_efi("UEFI Secure Boot is enabled.\n");
efi_info("UEFI Secure Boot is enabled.\n");
return efi_secureboot_mode_enabled;
out_efi_err:
pr_efi_err("Could not determine UEFI Secure Boot status.\n");
efi_err("Could not determine UEFI Secure Boot status.\n");
return efi_secureboot_mode_unknown;
}

2
drivers/firmware/efi/libstub/tpm.c
View file

@ -119,7 +119,7 @@ void efi_retrieve_tpm2_eventlog(void)
sizeof(*log_tbl) + log_size, (void **)&log_tbl);
if (status != EFI_SUCCESS) {
efi_printk("Unable to allocate memory for event log\n");
efi_err("Unable to allocate memory for event log\n");
return;
}

564
drivers/firmware/efi/libstub/vsprintf.c Normal file
View file

@ -0,0 +1,564 @@
// SPDX-License-Identifier: GPL-2.0-only
/* -*- linux-c -*- ------------------------------------------------------- *
*
* Copyright (C) 1991, 1992 Linus Torvalds
* Copyright 2007 rPath, Inc. - All Rights Reserved
*
* ----------------------------------------------------------------------- */
/*
* Oh, it's a waste of space, but oh-so-yummy for debugging.
*/
#include <stdarg.h>
#include <linux/compiler.h>
#include <linux/ctype.h>
#include <linux/kernel.h>
#include <linux/limits.h>
#include <linux/string.h>
#include <linux/types.h>
static
int skip_atoi(const char **s)
{
int i = 0;
while (isdigit(**s))
i = i * 10 + *((*s)++) - '0';
return i;
}
/*
* put_dec_full4 handles numbers in the range 0 <= r < 10000.
* The multiplier 0xccd is round(2^15/10), and the approximation
* r/10 == (r * 0xccd) >> 15 is exact for all r < 16389.
*/
static
void put_dec_full4(char *end, unsigned int r)
{
int i;
for (i = 0; i < 3; i++) {
unsigned int q = (r * 0xccd) >> 15;
*--end = '0' + (r - q * 10);
r = q;
}
*--end = '0' + r;
}
/* put_dec is copied from lib/vsprintf.c with small modifications */
/*
* Call put_dec_full4 on x % 10000, return x / 10000.
* The approximation x/10000 == (x * 0x346DC5D7) >> 43
* holds for all x < 1,128,869,999. The largest value this
* helper will ever be asked to convert is 1,125,520,955.
* (second call in the put_dec code, assuming n is all-ones).
*/
static
unsigned int put_dec_helper4(char *end, unsigned int x)
{
unsigned int q = (x * 0x346DC5D7ULL) >> 43;
put_dec_full4(end, x - q * 10000);
return q;
}
/* Based on code by Douglas W. Jones found at
* <http://www.cs.uiowa.edu/~jones/bcd/decimal.html#sixtyfour>
* (with permission from the author).
* Performs no 64-bit division and hence should be fast on 32-bit machines.
*/
static
char *put_dec(char *end, unsigned long long n)
{
unsigned int d3, d2, d1, q, h;
char *p = end;
d1 = ((unsigned int)n >> 16); /* implicit "& 0xffff" */
h = (n >> 32);
d2 = (h ) & 0xffff;
d3 = (h >> 16); /* implicit "& 0xffff" */
/* n = 2^48 d3 + 2^32 d2 + 2^16 d1 + d0
= 281_4749_7671_0656 d3 + 42_9496_7296 d2 + 6_5536 d1 + d0 */
q = 656 * d3 + 7296 * d2 + 5536 * d1 + ((unsigned int)n & 0xffff);
q = put_dec_helper4(p, q);
p -= 4;
q += 7671 * d3 + 9496 * d2 + 6 * d1;
q = put_dec_helper4(p, q);
p -= 4;
q += 4749 * d3 + 42 * d2;
q = put_dec_helper4(p, q);
p -= 4;
q += 281 * d3;
q = put_dec_helper4(p, q);
p -= 4;
put_dec_full4(p, q);
p -= 4;
/* strip off the extra 0's we printed */
while (p < end && *p == '0')
++p;
return p;
}
static
char *number(char *end, unsigned long long num, int base, char locase)
{
/*
* locase = 0 or 0x20. ORing digits or letters with 'locase'
* produces same digits or (maybe lowercased) letters
*/
/* we are called with base 8, 10 or 16, only, thus don't need "G..." */
static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
switch (base) {
case 10:
if (num != 0)
end = put_dec(end, num);
break;
case 8:
for (; num != 0; num >>= 3)
*--end = '0' + (num & 07);
break;
case 16:
for (; num != 0; num >>= 4)
*--end = digits[num & 0xf] | locase;
break;
default:
unreachable();
};
return end;
}
#define ZEROPAD 1 /* pad with zero */
#define SIGN 2 /* unsigned/signed long */
#define PLUS 4 /* show plus */
#define SPACE 8 /* space if plus */
#define LEFT 16 /* left justified */
#define SMALL 32 /* Must be 32 == 0x20 */
#define SPECIAL 64 /* 0x */
#define WIDE 128 /* UTF-16 string */
static
int get_flags(const char **fmt)
{
int flags = 0;
do {
switch (**fmt) {
case '-':
flags |= LEFT;
break;
case '+':
flags |= PLUS;
break;
case ' ':
flags |= SPACE;
break;
case '#':
flags |= SPECIAL;
break;
case '0':
flags |= ZEROPAD;
break;
default:
return flags;
}
++(*fmt);
} while (1);
}
static
int get_int(const char **fmt, va_list *ap)
{
if (isdigit(**fmt))
return skip_atoi(fmt);
if (**fmt == '*') {
++(*fmt);
/* it's the next argument */
return va_arg(*ap, int);
}
return 0;
}
static
unsigned long long get_number(int sign, int qualifier, va_list *ap)
{
if (sign) {
switch (qualifier) {
case 'L':
return va_arg(*ap, long long);
case 'l':
return va_arg(*ap, long);
case 'h':
return (short)va_arg(*ap, int);
case 'H':
return (signed char)va_arg(*ap, int);
default:
return va_arg(*ap, int);
};
} else {
switch (qualifier) {
case 'L':
return va_arg(*ap, unsigned long long);
case 'l':
return va_arg(*ap, unsigned long);
case 'h':
return (unsigned short)va_arg(*ap, int);
case 'H':
return (unsigned char)va_arg(*ap, int);
default:
return va_arg(*ap, unsigned int);
}
}
}
static
char get_sign(long long *num, int flags)
{
if (!(flags & SIGN))
return 0;
if (*num < 0) {
*num = -(*num);
return '-';
}
if (flags & PLUS)
return '+';
if (flags & SPACE)
return ' ';
return 0;
}
static
size_t utf16s_utf8nlen(const u16 *s16, size_t maxlen)
{
size_t len, clen;
for (len = 0; len < maxlen && *s16; len += clen) {
u16 c0 = *s16++;
/* First, get the length for a BMP character */
clen = 1 + (c0 >= 0x80) + (c0 >= 0x800);
if (len + clen > maxlen)
break;
/*
* If this is a high surrogate, and we're already at maxlen, we
* can't include the character if it's a valid surrogate pair.
* Avoid accessing one extra word just to check if it's valid
* or not.
*/
if ((c0 & 0xfc00) == 0xd800) {
if (len + clen == maxlen)
break;
if ((*s16 & 0xfc00) == 0xdc00) {
++s16;
++clen;
}
}
}
return len;
}
static
u32 utf16_to_utf32(const u16 **s16)
{
u16 c0, c1;
c0 = *(*s16)++;
/* not a surrogate */
if ((c0 & 0xf800) != 0xd800)
return c0;
/* invalid: low surrogate instead of high */
if (c0 & 0x0400)
return 0xfffd;
c1 = **s16;
/* invalid: missing low surrogate */
if ((c1 & 0xfc00) != 0xdc00)
return 0xfffd;
/* valid surrogate pair */
++(*s16);
return (0x10000 - (0xd800 << 10) - 0xdc00) + (c0 << 10) + c1;
}
#define PUTC(c) \
do { \
if (pos < size) \
buf[pos] = (c); \
++pos; \
} while (0);
int vsnprintf(char *buf, size_t size, const char *fmt, va_list ap)
{
/* The maximum space required is to print a 64-bit number in octal */
char tmp[(sizeof(unsigned long long) * 8 + 2) / 3];
char *tmp_end = &tmp[ARRAY_SIZE(tmp)];
long long num;
int base;
const char *s;
size_t len, pos;
char sign;
int flags; /* flags to number() */
int field_width; /* width of output field */
int precision; /* min. # of digits for integers; max
number of chars for from string */
int qualifier; /* 'h', 'hh', 'l' or 'll' for integer fields */
va_list args;
/*
* We want to pass our input va_list to helper functions by reference,
* but there's an annoying edge case. If va_list was originally passed
* to us by value, we could just pass &ap down to the helpers. This is
* the case on, for example, X86_32.
* However, on X86_64 (and possibly others), va_list is actually a
* size-1 array containing a structure. Our function parameter ap has
* decayed from T[1] to T*, and &ap has type T** rather than T(*)[1],
* which is what will be expected by a function taking a va_list *
* parameter.
* One standard way to solve this mess is by creating a copy in a local
* variable of type va_list and then passing a pointer to that local
* copy instead, which is what we do here.
*/
va_copy(args, ap);
for (pos = 0; *fmt; ++fmt) {
if (*fmt != '%' || *++fmt == '%') {
PUTC(*fmt);
continue;
}
/* process flags */
flags = get_flags(&fmt);
/* get field width */
field_width = get_int(&fmt, &args);
if (field_width < 0) {
field_width = -field_width;
flags |= LEFT;
}
if (flags & LEFT)
flags &= ~ZEROPAD;
/* get the precision */
precision = -1;
if (*fmt == '.') {
++fmt;
precision = get_int(&fmt, &args);
if (precision >= 0)
flags &= ~ZEROPAD;
}
/* get the conversion qualifier */
qualifier = -1;
if (*fmt == 'h' || *fmt == 'l') {
qualifier = *fmt;
++fmt;
if (qualifier == *fmt) {
qualifier -= 'a'-'A';
++fmt;
}
}
sign = 0;
switch (*fmt) {
case 'c':
flags &= LEFT;
s = tmp;
if (qualifier == 'l') {
((u16 *)tmp)[0] = (u16)va_arg(args, unsigned int);
((u16 *)tmp)[1] = L'\0';
precision = INT_MAX;
goto wstring;
} else {
tmp[0] = (unsigned char)va_arg(args, int);
precision = len = 1;
}
goto output;
case 's':
flags &= LEFT;
if (precision < 0)
precision = INT_MAX;
s = va_arg(args, void *);
if (!s)
s = precision < 6 ? "" : "(null)";
else if (qualifier == 'l') {
wstring:
flags |= WIDE;
precision = len = utf16s_utf8nlen((const u16 *)s, precision);
goto output;
}
precision = len = strnlen(s, precision);
goto output;
/* integer number formats - set up the flags and "break" */
case 'o':
base = 8;
break;
case 'p':
if (precision < 0)
precision = 2 * sizeof(void *);
fallthrough;
case 'x':
flags |= SMALL;
fallthrough;
case 'X':
base = 16;
break;
case 'd':
case 'i':
flags |= SIGN;
fallthrough;
case 'u':
flags &= ~SPECIAL;
base = 10;
break;
default:
/*
* Bail out if the conversion specifier is invalid.
* There's probably a typo in the format string and the
* remaining specifiers are unlikely to match up with
* the arguments.
*/
goto fail;
}
if (*fmt == 'p') {
num = (unsigned long)va_arg(args, void *);
} else {
num = get_number(flags & SIGN, qualifier, &args);
}
sign = get_sign(&num, flags);
if (sign)
--field_width;
s = number(tmp_end, num, base, flags & SMALL);
len = tmp_end - s;
/* default precision is 1 */
if (precision < 0)
precision = 1;
/* precision is minimum number of digits to print */
if (precision < len)
precision = len;
if (flags & SPECIAL) {
/*
* For octal, a leading 0 is printed only if necessary,
* i.e. if it's not already there because of the
* precision.
*/
if (base == 8 && precision == len)
++precision;
/*
* For hexadecimal, the leading 0x is skipped if the
* output is empty, i.e. both the number and the
* precision are 0.
*/
if (base == 16 && precision > 0)
field_width -= 2;
else
flags &= ~SPECIAL;
}
/*
* For zero padding, increase the precision to fill the field
* width.
*/
if ((flags & ZEROPAD) && field_width > precision)
precision = field_width;
output:
/* Calculate the padding necessary */
field_width -= precision;
/* Leading padding with ' ' */
if (!(flags & LEFT))
while (field_width-- > 0)
PUTC(' ');
/* sign */
if (sign)
PUTC(sign);
/* 0x/0X for hexadecimal */
if (flags & SPECIAL) {
PUTC('0');
PUTC( 'X' | (flags & SMALL));
}
/* Zero padding and excess precision */
while (precision-- > len)
PUTC('0');
/* Actual output */
if (flags & WIDE) {
const u16 *ws = (const u16 *)s;
while (len-- > 0) {
u32 c32 = utf16_to_utf32(&ws);
u8 *s8;
size_t clen;
if (c32 < 0x80) {
PUTC(c32);
continue;
}
/* Number of trailing octets */
clen = 1 + (c32 >= 0x800) + (c32 >= 0x10000);
len -= clen;
s8 = (u8 *)&buf[pos];
/* Avoid writing partial character */
PUTC('\0');
pos += clen;
if (pos >= size)
continue;
/* Set high bits of leading octet */
*s8 = (0xf00 >> 1) >> clen;
/* Write trailing octets in reverse order */
for (s8 += clen; clen; --clen, c32 >>= 6)
*s8-- = 0x80 | (c32 & 0x3f);
/* Set low bits of leading octet */
*s8 |= c32;
}
} else {
while (len-- > 0)
PUTC(*s++);
}
/* Trailing padding with ' ' */
while (field_width-- > 0)
PUTC(' ');
}
fail:
va_end(args);
if (size)
buf[min(pos, size-1)] = '\0';
return pos;
}
int snprintf(char *buf, size_t size, const char *fmt, ...)
{
va_list args;
int i;
va_start(args, fmt);
i = vsnprintf(buf, size, fmt, args);
va_end(args);
return i;
}

124
drivers/firmware/efi/libstub/x86-stub.c
View file

@ -22,6 +22,7 @@
const efi_system_table_t *efi_system_table;
extern u32 image_offset;
static efi_loaded_image_t *image = NULL;
static efi_status_t
preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
@ -49,7 +50,7 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
status = efi_bs_call(allocate_pool, EFI_LOADER_DATA, size,
(void **)&rom);
if (status != EFI_SUCCESS) {
efi_printk("Failed to allocate memory for 'rom'\n");
efi_err("Failed to allocate memory for 'rom'\n");
return status;
}
@ -65,7 +66,7 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
PCI_VENDOR_ID, 1, &rom->vendor);
if (status != EFI_SUCCESS) {
efi_printk("Failed to read rom->vendor\n");
efi_err("Failed to read rom->vendor\n");
goto free_struct;
}
@ -73,7 +74,7 @@ preserve_pci_rom_image(efi_pci_io_protocol_t *pci, struct pci_setup_rom **__rom)
PCI_DEVICE_ID, 1, &rom->devid);
if (status != EFI_SUCCESS) {
efi_printk("Failed to read rom->devid\n");
efi_err("Failed to read rom->devid\n");
goto free_struct;
}
@ -118,7 +119,7 @@ static void setup_efi_pci(struct boot_params *params)
(void **)&pci_handle);
if (status != EFI_SUCCESS) {
efi_printk("Failed to allocate memory for 'pci_handle'\n");
efi_err("Failed to allocate memory for 'pci_handle'\n");
return;
}
@ -172,7 +173,7 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params)
return;
if (efi_table_attr(p, version) != 0x10000) {
efi_printk("Unsupported properties proto version\n");
efi_err("Unsupported properties proto version\n");
return;
}
@ -185,7 +186,7 @@ static void retrieve_apple_device_properties(struct boot_params *boot_params)
size + sizeof(struct setup_data),
(void **)&new);
if (status != EFI_SUCCESS) {
efi_printk("Failed to allocate memory for 'properties'\n");
efi_err("Failed to allocate memory for 'properties'\n");
return;
}
@ -355,7 +356,6 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
{
struct boot_params *boot_params;
struct setup_header *hdr;
efi_loaded_image_t *image;
void *image_base;
efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID;
int options_size = 0;
@ -372,20 +372,21 @@ efi_status_t __efiapi efi_pe_entry(efi_handle_t handle,
status = efi_bs_call(handle_protocol, handle, &proto, (void **)&image);
if (status != EFI_SUCCESS) {
efi_printk("Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
efi_err("Failed to get handle for LOADED_IMAGE_PROTOCOL\n");
efi_exit(handle, status);
}
image_base = efi_table_attr(image, image_base);
image_offset = (void *)startup_32 - image_base;
status = efi_allocate_pages(0x4000, (unsigned long *)&boot_params, ULONG_MAX);
status = efi_allocate_pages(sizeof(struct boot_params),
(unsigned long *)&boot_params, ULONG_MAX);
if (status != EFI_SUCCESS) {
efi_printk("Failed to allocate lowmem for boot params\n");
efi_err("Failed to allocate lowmem for boot params\n");
efi_exit(handle, status);
}
memset(boot_params, 0x0, 0x4000);
memset(boot_params, 0x0, sizeof(struct boot_params));
hdr = &boot_params->hdr;
@ -403,43 +404,21 @@ 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;
hdr->cmd_line_ptr = (unsigned long)cmdline_ptr;
/* Fill in upper bits of command line address, NOP on 32 bit */
boot_params->ext_cmd_line_ptr = (u64)(unsigned long)cmdline_ptr >> 32;
efi_set_u64_split((unsigned long)cmdline_ptr,
&hdr->cmd_line_ptr, &boot_params->ext_cmd_line_ptr);
hdr->ramdisk_image = 0;
hdr->ramdisk_size = 0;
if (efi_is_native()) {
status = efi_parse_options(cmdline_ptr);
if (status != EFI_SUCCESS)
goto fail2;
if (!efi_noinitrd) {
status = efi_load_initrd(image, &ramdisk_addr,
&ramdisk_size,
hdr->initrd_addr_max,
ULONG_MAX);
if (status != EFI_SUCCESS)
goto fail2;
hdr->ramdisk_image = ramdisk_addr & 0xffffffff;
hdr->ramdisk_size = ramdisk_size & 0xffffffff;
boot_params->ext_ramdisk_image = (u64)ramdisk_addr >> 32;
boot_params->ext_ramdisk_size = (u64)ramdisk_size >> 32;
}
}
efi_stub_entry(handle, sys_table_arg, boot_params);
/* not reached */
fail2:
efi_free(options_size, (unsigned long)cmdline_ptr);
fail:
efi_free(0x4000, (unsigned long)boot_params);
efi_free(sizeof(struct boot_params), (unsigned long)boot_params);
efi_exit(handle, status);
}
@ -632,17 +611,14 @@ static efi_status_t exit_boot_func(struct efi_boot_memmap *map,
: EFI32_LOADER_SIGNATURE;
memcpy(&p->efi->efi_loader_signature, signature, sizeof(__u32));
p->efi->efi_systab = (unsigned long)efi_system_table;
efi_set_u64_split((unsigned long)efi_system_table,
&p->efi->efi_systab, &p->efi->efi_systab_hi);
p->efi->efi_memdesc_size = *map->desc_size;
p->efi->efi_memdesc_version = *map->desc_ver;
p->efi->efi_memmap = (unsigned long)*map->map;
efi_set_u64_split((unsigned long)*map->map,
&p->efi->efi_memmap, &p->efi->efi_memmap_hi);
p->efi->efi_memmap_size = *map->map_size;
#ifdef CONFIG_X86_64
p->efi->efi_systab_hi = (unsigned long)efi_system_table >> 32;
p->efi->efi_memmap_hi = (unsigned long)*map->map >> 32;
#endif
return EFI_SUCCESS;
}
@ -698,7 +674,6 @@ unsigned long efi_main(efi_handle_t handle,
unsigned long buffer_start, buffer_end;
struct setup_header *hdr = &boot_params->hdr;
efi_status_t status;
unsigned long cmdline_paddr;
efi_system_table = sys_table_arg;
@ -746,7 +721,7 @@ unsigned long efi_main(efi_handle_t handle,
hdr->kernel_alignment,
LOAD_PHYSICAL_ADDR);
if (status != EFI_SUCCESS) {
efi_printk("efi_relocate_kernel() failed!\n");
efi_err("efi_relocate_kernel() failed!\n");
goto fail;
}
/*
@ -757,35 +732,46 @@ unsigned long efi_main(efi_handle_t handle,
image_offset = 0;
}
/*
* efi_pe_entry() may have been called before efi_main(), in which
* case this is the second time we parse the cmdline. This is ok,
* parsing the cmdline multiple times does not have side-effects.
*/
cmdline_paddr = ((u64)hdr->cmd_line_ptr |
((u64)boot_params->ext_cmd_line_ptr << 32));
efi_parse_options((char *)cmdline_paddr);
#ifdef CONFIG_CMDLINE_BOOL
status = efi_parse_options(CONFIG_CMDLINE);
if (status != EFI_SUCCESS) {
efi_err("Failed to parse options\n");
goto fail;
}
#endif
if (!IS_ENABLED(CONFIG_CMDLINE_OVERRIDE)) {
unsigned long cmdline_paddr = ((u64)hdr->cmd_line_ptr |
((u64)boot_params->ext_cmd_line_ptr << 32));
status = efi_parse_options((char *)cmdline_paddr);
if (status != EFI_SUCCESS) {
efi_err("Failed to parse options\n");
goto fail;
}
}
/*
* At this point, an initrd may already have been loaded, either by
* the bootloader and passed via bootparams, or loaded from a initrd=
* command line option by efi_pe_entry() above. In either case, we
* permit an initrd loaded from the LINUX_EFI_INITRD_MEDIA_GUID device
* path to supersede it.
* At this point, an initrd may already have been loaded by the
* bootloader and passed via bootparams. We permit an initrd loaded
* from the LINUX_EFI_INITRD_MEDIA_GUID device path to supersede it.
*
* If the device path is not present, any command-line initrd=
* 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_dev_path(&addr, &size, ULONG_MAX);
if (status == EFI_SUCCESS) {
hdr->ramdisk_image = (u32)addr;
hdr->ramdisk_size = (u32)size;
boot_params->ext_ramdisk_image = (u64)addr >> 32;
boot_params->ext_ramdisk_size = (u64)size >> 32;
} else if (status != EFI_NOT_FOUND) {
efi_printk("efi_load_initrd_dev_path() failed!\n");
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;
}
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);
}
/*
@ -810,13 +796,13 @@ unsigned long efi_main(efi_handle_t handle,
status = exit_boot(boot_params, handle);
if (status != EFI_SUCCESS) {
efi_printk("exit_boot() failed!\n");
efi_err("exit_boot() failed!\n");
goto fail;
}
return bzimage_addr;
fail:
efi_printk("efi_main() failed!\n");
efi_err("efi_main() failed!\n");
efi_exit(handle, status);
}

4
include/linux/efi.h
View file

@ -39,6 +39,7 @@
#define EFI_WRITE_PROTECTED ( 8 | (1UL << (BITS_PER_LONG-1)))
#define EFI_OUT_OF_RESOURCES ( 9 | (1UL << (BITS_PER_LONG-1)))
#define EFI_NOT_FOUND (14 | (1UL << (BITS_PER_LONG-1)))
#define EFI_TIMEOUT (18 | (1UL << (BITS_PER_LONG-1)))
#define EFI_ABORTED (21 | (1UL << (BITS_PER_LONG-1)))
#define EFI_SECURITY_VIOLATION (26 | (1UL << (BITS_PER_LONG-1)))
@ -426,6 +427,7 @@ typedef struct {
u32 tables;
} efi_system_table_32_t;
typedef union efi_simple_text_input_protocol efi_simple_text_input_protocol_t;
typedef union efi_simple_text_output_protocol efi_simple_text_output_protocol_t;
typedef union {
@ -434,7 +436,7 @@ typedef union {
unsigned long fw_vendor; /* physical addr of CHAR16 vendor string */
u32 fw_revision;
unsigned long con_in_handle;
unsigned long con_in;
efi_simple_text_input_protocol_t *con_in;
unsigned long con_out_handle;
efi_simple_text_output_protocol_t *con_out;
unsigned long stderr_handle;