diff options
Diffstat (limited to 'arch/x86/boot')
28 files changed, 1782 insertions, 499 deletions
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile index d9c11956fce0..dbe8dd2fe247 100644 --- a/arch/x86/boot/Makefile +++ b/arch/x86/boot/Makefile @@ -20,7 +20,7 @@ targets := vmlinux.bin setup.bin setup.elf bzImage targets += fdimage fdimage144 fdimage288 image.iso mtools.conf subdir- := compressed -setup-y += a20.o bioscall.o cmdline.o copy.o cpu.o cpucheck.o +setup-y += a20.o bioscall.o cmdline.o copy.o cpu.o cpuflags.o cpucheck.o setup-y += early_serial_console.o edd.o header.o main.o mca.o memory.o setup-y += pm.o pmjump.o printf.o regs.o string.o tty.o video.o setup-y += video-mode.o version.o @@ -51,20 +51,7 @@ $(obj)/cpustr.h: $(obj)/mkcpustr FORCE # --------------------------------------------------------------------------- -# How to compile the 16-bit code. Note we always compile for -march=i386, -# that way we can complain to the user if the CPU is insufficient. -KBUILD_CFLAGS := $(USERINCLUDE) -m32 -g -Os -D_SETUP -D__KERNEL__ \ - -DDISABLE_BRANCH_PROFILING \ - -Wall -Wstrict-prototypes \ - -march=i386 -mregparm=3 \ - -include $(srctree)/$(src)/code16gcc.h \ - -fno-strict-aliasing -fomit-frame-pointer -fno-pic \ - -mno-mmx -mno-sse \ - $(call cc-option, -ffreestanding) \ - $(call cc-option, -fno-toplevel-reorder,\ - $(call cc-option, -fno-unit-at-a-time)) \ - $(call cc-option, -fno-stack-protector) \ - $(call cc-option, -mpreferred-stack-boundary=2) +KBUILD_CFLAGS := $(USERINCLUDE) $(REALMODE_CFLAGS) -D_SETUP KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__ GCOV_PROFILE := n @@ -84,7 +71,7 @@ $(obj)/vmlinux.bin: $(obj)/compressed/vmlinux FORCE SETUP_OBJS = $(addprefix $(obj)/,$(setup-y)) -sed-voffset := -e 's/^\([0-9a-fA-F]*\) . \(_text\|_end\)$$/\#define VO_\2 0x\1/p' +sed-voffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(_text\|_end\)$$/\#define VO_\2 0x\1/p' quiet_cmd_voffset = VOFFSET $@ cmd_voffset = $(NM) $< | sed -n $(sed-voffset) > $@ @@ -93,7 +80,7 @@ targets += voffset.h $(obj)/voffset.h: vmlinux FORCE $(call if_changed,voffset) -sed-zoffset := -e 's/^\([0-9a-fA-F]*\) . \(startup_32\|startup_64\|efi_pe_entry\|efi_stub_entry\|input_data\|_end\|z_.*\)$$/\#define ZO_\2 0x\1/p' +sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|input_data\|_end\|z_.*\)$$/\#define ZO_\2 0x\1/p' quiet_cmd_zoffset = ZOFFSET $@ cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@ diff --git a/arch/x86/boot/bioscall.S b/arch/x86/boot/bioscall.S index 1dfbf64e52a2..d401b4a262b0 100644 --- a/arch/x86/boot/bioscall.S +++ b/arch/x86/boot/bioscall.S @@ -1,6 +1,6 @@ /* ----------------------------------------------------------------------- * - * Copyright 2009 Intel Corporation; author H. Peter Anvin + * Copyright 2009-2014 Intel Corporation; author H. Peter Anvin * * This file is part of the Linux kernel, and is made available under * the terms of the GNU General Public License version 2 or (at your @@ -13,8 +13,8 @@ * touching registers they shouldn't be. */ - .code16gcc - .text + .code16 + .section ".inittext","ax" .globl intcall .type intcall, @function intcall: diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h index ef72baeff484..bd49ec61255c 100644 --- a/arch/x86/boot/boot.h +++ b/arch/x86/boot/boot.h @@ -26,9 +26,8 @@ #include <asm/boot.h> #include <asm/setup.h> #include "bitops.h" -#include <asm/cpufeature.h> -#include <asm/processor-flags.h> #include "ctype.h" +#include "cpuflags.h" /* Useful macros */ #define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) @@ -178,14 +177,6 @@ static inline void wrgs32(u32 v, addr_t addr) } /* Note: these only return true/false, not a signed return value! */ -static inline int memcmp(const void *s1, const void *s2, size_t len) -{ - u8 diff; - asm("repe; cmpsb; setnz %0" - : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); - return diff; -} - static inline int memcmp_fs(const void *s1, addr_t s2, size_t len) { u8 diff; @@ -229,11 +220,6 @@ void copy_to_fs(addr_t dst, void *src, size_t len); void *copy_from_fs(void *dst, addr_t src, size_t len); void copy_to_gs(addr_t dst, void *src, size_t len); void *copy_from_gs(void *dst, addr_t src, size_t len); -void *memcpy(void *dst, void *src, size_t len); -void *memset(void *dst, int c, size_t len); - -#define memcpy(d,s,l) __builtin_memcpy(d,s,l) -#define memset(d,c,l) __builtin_memset(d,c,l) /* a20.c */ int enable_a20(void); @@ -307,14 +293,7 @@ static inline int cmdline_find_option_bool(const char *option) return __cmdline_find_option_bool(cmd_line_ptr, option); } - /* cpu.c, cpucheck.c */ -struct cpu_features { - int level; /* Family, or 64 for x86-64 */ - int model; - u32 flags[NCAPINTS]; -}; -extern struct cpu_features cpu; int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr); int validate_cpu(void); diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index c8a6792e7842..0fcd9133790c 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -28,7 +28,7 @@ HOST_EXTRACFLAGS += -I$(srctree)/tools/include VMLINUX_OBJS = $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o \ $(obj)/string.o $(obj)/cmdline.o $(obj)/early_serial_console.o \ - $(obj)/piggy.o + $(obj)/piggy.o $(obj)/cpuflags.o $(obj)/aslr.o $(obj)/eboot.o: KBUILD_CFLAGS += -fshort-wchar -mno-red-zone diff --git a/arch/x86/boot/compressed/aslr.c b/arch/x86/boot/compressed/aslr.c new file mode 100644 index 000000000000..fc6091abedb7 --- /dev/null +++ b/arch/x86/boot/compressed/aslr.c @@ -0,0 +1,324 @@ +#include "misc.h" + +#ifdef CONFIG_RANDOMIZE_BASE +#include <asm/msr.h> +#include <asm/archrandom.h> +#include <asm/e820.h> + +#include <generated/compile.h> +#include <linux/module.h> +#include <linux/uts.h> +#include <linux/utsname.h> +#include <generated/utsrelease.h> + +/* Simplified build-specific string for starting entropy. */ +static const char build_str[] = UTS_RELEASE " (" LINUX_COMPILE_BY "@" + LINUX_COMPILE_HOST ") (" LINUX_COMPILER ") " UTS_VERSION; + +#define I8254_PORT_CONTROL 0x43 +#define I8254_PORT_COUNTER0 0x40 +#define I8254_CMD_READBACK 0xC0 +#define I8254_SELECT_COUNTER0 0x02 +#define I8254_STATUS_NOTREADY 0x40 +static inline u16 i8254(void) +{ + u16 status, timer; + + do { + outb(I8254_PORT_CONTROL, + I8254_CMD_READBACK | I8254_SELECT_COUNTER0); + status = inb(I8254_PORT_COUNTER0); + timer = inb(I8254_PORT_COUNTER0); + timer |= inb(I8254_PORT_COUNTER0) << 8; + } while (status & I8254_STATUS_NOTREADY); + + return timer; +} + +static unsigned long rotate_xor(unsigned long hash, const void *area, + size_t size) +{ + size_t i; + unsigned long *ptr = (unsigned long *)area; + + for (i = 0; i < size / sizeof(hash); i++) { + /* Rotate by odd number of bits and XOR. */ + hash = (hash << ((sizeof(hash) * 8) - 7)) | (hash >> 7); + hash ^= ptr[i]; + } + + return hash; +} + +/* Attempt to create a simple but unpredictable starting entropy. */ +static unsigned long get_random_boot(void) +{ + unsigned long hash = 0; + + hash = rotate_xor(hash, build_str, sizeof(build_str)); + hash = rotate_xor(hash, real_mode, sizeof(*real_mode)); + + return hash; +} + +static unsigned long get_random_long(void) +{ +#ifdef CONFIG_X86_64 + const unsigned long mix_const = 0x5d6008cbf3848dd3UL; +#else + const unsigned long mix_const = 0x3f39e593UL; +#endif + unsigned long raw, random = get_random_boot(); + bool use_i8254 = true; + + debug_putstr("KASLR using"); + + if (has_cpuflag(X86_FEATURE_RDRAND)) { + debug_putstr(" RDRAND"); + if (rdrand_long(&raw)) { + random ^= raw; + use_i8254 = false; + } + } + + if (has_cpuflag(X86_FEATURE_TSC)) { + debug_putstr(" RDTSC"); + rdtscll(raw); + + random ^= raw; + use_i8254 = false; + } + + if (use_i8254) { + debug_putstr(" i8254"); + random ^= i8254(); + } + + /* Circular multiply for better bit diffusion */ + asm("mul %3" + : "=a" (random), "=d" (raw) + : "a" (random), "rm" (mix_const)); + random += raw; + + debug_putstr("...\n"); + + return random; +} + +struct mem_vector { + unsigned long start; + unsigned long size; +}; + +#define MEM_AVOID_MAX 5 +static struct mem_vector mem_avoid[MEM_AVOID_MAX]; + +static bool mem_contains(struct mem_vector *region, struct mem_vector *item) +{ + /* Item at least partially before region. */ + if (item->start < region->start) + return false; + /* Item at least partially after region. */ + if (item->start + item->size > region->start + region->size) + return false; + return true; +} + +static bool mem_overlaps(struct mem_vector *one, struct mem_vector *two) +{ + /* Item one is entirely before item two. */ + if (one->start + one->size <= two->start) + return false; + /* Item one is entirely after item two. */ + if (one->start >= two->start + two->size) + return false; + return true; +} + +static void mem_avoid_init(unsigned long input, unsigned long input_size, + unsigned long output, unsigned long output_size) +{ + u64 initrd_start, initrd_size; + u64 cmd_line, cmd_line_size; + unsigned long unsafe, unsafe_len; + char *ptr; + + /* + * Avoid the region that is unsafe to overlap during + * decompression (see calculations at top of misc.c). + */ + unsafe_len = (output_size >> 12) + 32768 + 18; + unsafe = (unsigned long)input + input_size - unsafe_len; + mem_avoid[0].start = unsafe; + mem_avoid[0].size = unsafe_len; + + /* Avoid initrd. */ + initrd_start = (u64)real_mode->ext_ramdisk_image << 32; + initrd_start |= real_mode->hdr.ramdisk_image; + initrd_size = (u64)real_mode->ext_ramdisk_size << 32; + initrd_size |= real_mode->hdr.ramdisk_size; + mem_avoid[1].start = initrd_start; + mem_avoid[1].size = initrd_size; + + /* Avoid kernel command line. */ + cmd_line = (u64)real_mode->ext_cmd_line_ptr << 32; + cmd_line |= real_mode->hdr.cmd_line_ptr; + /* Calculate size of cmd_line. */ + ptr = (char *)(unsigned long)cmd_line; + for (cmd_line_size = 0; ptr[cmd_line_size++]; ) + ; + mem_avoid[2].start = cmd_line; + mem_avoid[2].size = cmd_line_size; + + /* Avoid heap memory. */ + mem_avoid[3].start = (unsigned long)free_mem_ptr; + mem_avoid[3].size = BOOT_HEAP_SIZE; + + /* Avoid stack memory. */ + mem_avoid[4].start = (unsigned long)free_mem_end_ptr; + mem_avoid[4].size = BOOT_STACK_SIZE; +} + +/* Does this memory vector overlap a known avoided area? */ +static bool mem_avoid_overlap(struct mem_vector *img) +{ + int i; + + for (i = 0; i < MEM_AVOID_MAX; i++) { + if (mem_overlaps(img, &mem_avoid[i])) + return true; + } + + return false; +} + +static unsigned long slots[CONFIG_RANDOMIZE_BASE_MAX_OFFSET / + CONFIG_PHYSICAL_ALIGN]; +static unsigned long slot_max; + +static void slots_append(unsigned long addr) +{ + /* Overflowing the slots list should be impossible. */ + if (slot_max >= CONFIG_RANDOMIZE_BASE_MAX_OFFSET / + CONFIG_PHYSICAL_ALIGN) + return; + + slots[slot_max++] = addr; +} + +static unsigned long slots_fetch_random(void) +{ + /* Handle case of no slots stored. */ + if (slot_max == 0) + return 0; + + return slots[get_random_long() % slot_max]; +} + +static void process_e820_entry(struct e820entry *entry, + unsigned long minimum, + unsigned long image_size) +{ + struct mem_vector region, img; + + /* Skip non-RAM entries. */ + if (entry->type != E820_RAM) + return; + + /* Ignore entries entirely above our maximum. */ + if (entry->addr >= CONFIG_RANDOMIZE_BASE_MAX_OFFSET) + return; + + /* Ignore entries entirely below our minimum. */ + if (entry->addr + entry->size < minimum) + return; + + region.start = entry->addr; + region.size = entry->size; + + /* Potentially raise address to minimum location. */ + if (region.start < minimum) + region.start = minimum; + + /* Potentially raise address to meet alignment requirements. */ + region.start = ALIGN(region.start, CONFIG_PHYSICAL_ALIGN); + + /* Did we raise the address above the bounds of this e820 region? */ + if (region.start > entry->addr + entry->size) + return; + + /* Reduce size by any delta from the original address. */ + region.size -= region.start - entry->addr; + + /* Reduce maximum size to fit end of image within maximum limit. */ + if (region.start + region.size > CONFIG_RANDOMIZE_BASE_MAX_OFFSET) + region.size = CONFIG_RANDOMIZE_BASE_MAX_OFFSET - region.start; + + /* Walk each aligned slot and check for avoided areas. */ + for (img.start = region.start, img.size = image_size ; + mem_contains(®ion, &img) ; + img.start += CONFIG_PHYSICAL_ALIGN) { + if (mem_avoid_overlap(&img)) + continue; + slots_append(img.start); + } +} + +static unsigned long find_random_addr(unsigned long minimum, + unsigned long size) +{ + int i; + unsigned long addr; + + /* Make sure minimum is aligned. */ + minimum = ALIGN(minimum, CONFIG_PHYSICAL_ALIGN); + + /* Verify potential e820 positions, appending to slots list. */ + for (i = 0; i < real_mode->e820_entries; i++) { + process_e820_entry(&real_mode->e820_map[i], minimum, size); + } + + return slots_fetch_random(); +} + +unsigned char *choose_kernel_location(unsigned char *input, + unsigned long input_size, + unsigned char *output, + unsigned long output_size) +{ + unsigned long choice = (unsigned long)output; + unsigned long random; + +#ifdef CONFIG_HIBERNATION + if (!cmdline_find_option_bool("kaslr")) { + debug_putstr("KASLR disabled by default...\n"); + goto out; + } +#else + if (cmdline_find_option_bool("nokaslr")) { + debug_putstr("KASLR disabled by cmdline...\n"); + goto out; + } +#endif + + /* Record the various known unsafe memory ranges. */ + mem_avoid_init((unsigned long)input, input_size, + (unsigned long)output, output_size); + + /* Walk e820 and find a random address. */ + random = find_random_addr(choice, output_size); + if (!random) { + debug_putstr("KASLR could not find suitable E820 region...\n"); + goto out; + } + + /* Always enforce the minimum. */ + if (random < choice) + goto out; + + choice = random; +out: + return (unsigned char *)choice; +} + +#endif /* CONFIG_RANDOMIZE_BASE */ diff --git a/arch/x86/boot/compressed/cmdline.c b/arch/x86/boot/compressed/cmdline.c index bffd73b45b1f..b68e3033e6b9 100644 --- a/arch/x86/boot/compressed/cmdline.c +++ b/arch/x86/boot/compressed/cmdline.c @@ -1,6 +1,6 @@ #include "misc.h" -#ifdef CONFIG_EARLY_PRINTK +#if CONFIG_EARLY_PRINTK || CONFIG_RANDOMIZE_BASE static unsigned long fs; static inline void set_fs(unsigned long seg) diff --git a/arch/x86/boot/compressed/cpuflags.c b/arch/x86/boot/compressed/cpuflags.c new file mode 100644 index 000000000000..aa313466118b --- /dev/null +++ b/arch/x86/boot/compressed/cpuflags.c @@ -0,0 +1,12 @@ +#ifdef CONFIG_RANDOMIZE_BASE + +#include "../cpuflags.c" + +bool has_cpuflag(int flag) +{ + get_cpuflags(); + + return test_bit(flag, cpu.flags); +} + +#endif diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c index a7677babf946..0331d765c2bb 100644 --- a/arch/x86/boot/compressed/eboot.c +++ b/arch/x86/boot/compressed/eboot.c @@ -19,10 +19,272 @@ static efi_system_table_t *sys_table; +static struct efi_config *efi_early; + +#define efi_call_early(f, ...) \ + efi_early->call(efi_early->f, __VA_ARGS__); + +#define BOOT_SERVICES(bits) \ +static void setup_boot_services##bits(struct efi_config *c) \ +{ \ + efi_system_table_##bits##_t *table; \ + efi_boot_services_##bits##_t *bt; \ + \ + table = (typeof(table))sys_table; \ + \ + c->text_output = table->con_out; \ + \ + bt = (typeof(bt))(unsigned long)(table->boottime); \ + \ + c->allocate_pool = bt->allocate_pool; \ + c->allocate_pages = bt->allocate_pages; \ + c->get_memory_map = bt->get_memory_map; \ + c->free_pool = bt->free_pool; \ + c->free_pages = bt->free_pages; \ + c->locate_handle = bt->locate_handle; \ + c->handle_protocol = bt->handle_protocol; \ + c->exit_boot_services = bt->exit_boot_services; \ +} +BOOT_SERVICES(32); +BOOT_SERVICES(64); -#include "../../../../drivers/firmware/efi/efi-stub-helper.c" +static void efi_printk(efi_system_table_t *, char *); +static void efi_char16_printk(efi_system_table_t *, efi_char16_t *); + +static efi_status_t +__file_size32(void *__fh, efi_char16_t *filename_16, + void **handle, u64 *file_sz) +{ + efi_file_handle_32_t *h, *fh = __fh; + efi_file_info_t *info; + efi_status_t status; + efi_guid_t info_guid = EFI_FILE_INFO_ID; + u32 info_sz; + + status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16, + EFI_FILE_MODE_READ, (u64)0); + if (status != EFI_SUCCESS) { + efi_printk(sys_table, "Failed to open file: "); + efi_char16_printk(sys_table, filename_16); + efi_printk(sys_table, "\n"); + return status; + } + + *handle = h; + + info_sz = 0; + status = efi_early->call((unsigned long)h->get_info, h, &info_guid, + &info_sz, NULL); + if (status != EFI_BUFFER_TOO_SMALL) { + efi_printk(sys_table, "Failed to get file info size\n"); + return status; + } + +grow: + status = efi_call_early(allocate_pool, EFI_LOADER_DATA, + info_sz, (void **)&info); + if (status != EFI_SUCCESS) { + efi_printk(sys_table, "Failed to alloc mem for file info\n"); + return status; + } + + status = efi_early->call((unsigned long)h->get_info, h, &info_guid, + &info_sz, info); + if (status == EFI_BUFFER_TOO_SMALL) { + efi_call_early(free_pool, info); + goto grow; + } + + *file_sz = info->file_size; + efi_call_early(free_pool, info); + + if (status != EFI_SUCCESS) + efi_printk(sys_table, "Failed to get initrd info\n"); + + return status; +} + +static efi_status_t +__file_size64(void *__fh, efi_char16_t *filename_16, + void **handle, u64 *file_sz) +{ + efi_file_handle_64_t *h, *fh = __fh; + efi_file_info_t *info; + efi_status_t status; + efi_guid_t info_guid = EFI_FILE_INFO_ID; + u64 info_sz; + status = efi_early->call((unsigned long)fh->open, fh, &h, filename_16, + EFI_FILE_MODE_READ, (u64)0); + if (status != EFI_SUCCESS) { + efi_printk(sys_table, "Failed to open file: "); + efi_char16_printk(sys_table, filename_16); + efi_printk(sys_table, "\n"); + return status; + } + *handle = h; + + info_sz = 0; + status = efi_early->call((unsigned long)h->get_info, h, &info_guid, + &info_sz, NULL); + if (status != EFI_BUFFER_TOO_SMALL) { + efi_printk(sys_table, "Failed to get file info size\n"); + return status; + } + +grow: + status = efi_call_early(allocate_pool, EFI_LOADER_DATA, + info_sz, (void **)&info); + if (status != EFI_SUCCESS) { + efi_printk(sys_table, "Failed to alloc mem for file info\n"); + return status; + } + + status = efi_early->call((unsigned long)h->get_info, h, &info_guid, + &info_sz, info); + if (status == EFI_BUFFER_TOO_SMALL) { + efi_call_early(free_pool, info); + goto grow; + } + + *file_sz = info->file_size; + efi_call_early(free_pool, info); + + if (status != EFI_SUCCESS) + efi_printk(sys_table, "Failed to get initrd info\n"); + + return status; +} +static efi_status_t +efi_file_size(efi_system_table_t *sys_table, void *__fh, + efi_char16_t *filename_16, void **handle, u64 *file_sz) +{ + if (efi_early->is64) + return __file_size64(__fh, filename_16, handle, file_sz); + + return __file_size32(__fh, filename_16, handle, file_sz); +} + +static inline efi_status_t +efi_file_read(void *handle, unsigned long *size, void *addr) +{ + unsigned long func; + + if (efi_early->is64) { + efi_file_handle_64_t *fh = handle; + + func = (unsigned long)fh->read; + return efi_early->call(func, handle, size, addr); + } else { + efi_file_handle_32_t *fh = handle; + + func = (unsigned long)fh->read; + return efi_early->call(func, handle, size, addr); + } +} + +static inline efi_status_t efi_file_close(void *handle) +{ + if (efi_early->is64) { + efi_file_handle_64_t *fh = handle; + + return efi_early->call((unsigned long)fh->close, handle); + } else { + efi_file_handle_32_t *fh = handle; + + return efi_early->call((unsigned long)fh->close, handle); + } +} + +static inline efi_status_t __open_volume32(void *__image, void **__fh) +{ + efi_file_io_interface_t *io; + efi_loaded_image_32_t *image = __image; + efi_file_handle_32_t *fh; + efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID; + efi_status_t status; + void *handle = (void *)(unsigned long)image->device_handle; + unsigned long func; + + status = efi_call_early(handle_protocol, handle, + &fs_proto, (void **)&io); + if (status != EFI_SUCCESS) { + efi_printk(sys_table, "Failed to handle fs_proto\n"); + return status; + } + + func = (unsigned long)io->open_volume; + status = efi_early->call(func, io, &fh); + if (status != EFI_SUCCESS) + efi_printk(sys_table, "Failed to open volume\n"); + + *__fh = fh; + return status; +} + +static inline efi_status_t __open_volume64(void *__image, void **__fh) +{ + efi_file_io_interface_t *io; + efi_loaded_image_64_t *image = __image; + efi_file_handle_64_t *fh; + efi_guid_t fs_proto = EFI_FILE_SYSTEM_GUID; + efi_status_t status; + void *handle = (void *)(unsigned long)image->device_handle; + unsigned long func; + + status = efi_call_early(handle_protocol, handle, + &fs_proto, (void **)&io); + if (status != EFI_SUCCESS) { + efi_printk(sys_table, "Failed to handle fs_proto\n"); + return status; + } + + func = (unsigned long)io->open_volume; + status = efi_early->call(func, io, &fh); + if (status != EFI_SUCCESS) + efi_printk(sys_table, "Failed to open volume\n"); + + *__fh = fh; + return status; +} + +static inline efi_status_t +efi_open_volume(efi_system_table_t *sys_table, void *__image, void **__fh) +{ + if (efi_early->is64) + return __open_volume64(__image, __fh); + + return __open_volume32(__image, __fh); +} + +static void efi_char16_printk(efi_system_table_t *table, efi_char16_t *str) +{ + unsigned long output_string; + size_t offset; + + if (efi_early->is64) { + struct efi_simple_text_output_protocol_64 *out; + u64 *func; + + offset = offsetof(typeof(*out), output_string); + output_string = efi_early->text_output + offset; + func = (u64 *)output_string; + + efi_early->call(*func, efi_early->text_output, str); + } else { + struct efi_simple_text_output_protocol_32 *out; + u32 *func; + + offset = offsetof(typeof(*out), output_string); + output_string = efi_early->text_output + offset; + func = (u32 *)output_string; + + efi_early->call(*func, efi_early->text_output, str); + } +} + +#include "../../../../drivers/firmware/efi/efi-stub-helper.c" static void find_bits(unsigned long mask, u8 *pos, u8 *size) { @@ -47,105 +309,97 @@ static void find_bits(unsigned long mask, u8 *pos, u8 *size) *size = len; } -static efi_status_t setup_efi_pci(struct boot_params *params) +static efi_status_t +__setup_efi_pci32(efi_pci_io_protocol_32 *pci, struct pci_setup_rom **__rom) { - efi_pci_io_protocol *pci; + struct pci_setup_rom *rom = NULL; efi_status_t status; - void **pci_handle; - efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; - unsigned long nr_pci, size = 0; - int i; - struct setup_data *data; - - data = (struct setup_data *)(unsigned long)params->hdr.setup_data; + unsigned long size; + uint64_t attributes; - while (data && data->next) - data = (struct setup_data *)(unsigned long)data->next; + status = efi_early->call(pci->attributes, pci, + EfiPciIoAttributeOperationGet, 0, 0, + &attributes); + if (status != EFI_SUCCESS) + return status; - status = efi_call_phys5(sys_table->boottime->locate_handle, - EFI_LOCATE_BY_PROTOCOL, &pci_proto, - NULL, &size, pci_handle); + if (!pci->romimage || !pci->romsize) + return EFI_INVALID_PARAMETER; - if (status == EFI_BUFFER_TOO_SMALL) { - status = efi_call_phys3(sys_table->boottime->allocate_pool, - EFI_LOADER_DATA, size, &pci_handle); + size = pci->romsize + sizeof(*rom); - if (status != EFI_SUCCESS) - return status; + status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom); + if (status != EFI_SUCCESS) + return status; - status = efi_call_phys5(sys_table->boottime->locate_handle, - EFI_LOCATE_BY_PROTOCOL, &pci_proto, - NULL, &size, pci_handle); - } + memset(rom, 0, sizeof(*rom)); - if (status != EFI_SUCCESS) - goto free_handle; + rom->data.type = SETUP_PCI; + rom->data.len = size - sizeof(struct setup_data); + rom->data.next = 0; + rom->pcilen = pci->romsize; + *__rom = rom; - nr_pci = size / sizeof(void *); - for (i = 0; i < nr_pci; i++) { - void *h = pci_handle[i]; - uint64_t attributes; - struct pci_setup_rom *rom; + status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16, + PCI_VENDOR_ID, 1, &(rom->vendor)); - status = efi_call_phys3(sys_table->boottime->handle_protocol, - h, &pci_proto, &pci); + if (status != EFI_SUCCESS) + goto free_struct; - if (status != EFI_SUCCESS) - continue; + status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16, + PCI_DEVICE_ID, 1, &(rom->devid)); - if (!pci) - continue; + if (status != EFI_SUCCESS) + goto free_struct; -#ifdef CONFIG_X86_64 - status = efi_call_phys4(pci->attributes, pci, - EfiPciIoAttributeOperationGet, 0, - &attributes); -#else - status = efi_call_phys5(pci->attributes, pci, - EfiPciIoAttributeOperationGet, 0, 0, - &attributes); -#endif - if (status != EFI_SUCCESS) - continue; + status = efi_early->call(pci->get_location, pci, &(rom->segment), + &(rom->bus), &(rom->device), &(rom->function)); - if (!pci->romimage || !pci->romsize) - continue; + if (status != EFI_SUCCESS) + goto free_struct; - size = pci->romsize + sizeof(*rom); + memcpy(rom->romdata, pci->romimage, pci->romsize); + return status; - status = efi_call_phys3(sys_table->boottime->allocate_pool, - EFI_LOADER_DATA, size, &rom); +free_struct: + efi_call_early(free_pool, rom); + return status; +} - if (status != EFI_SUCCESS) - continue; +static efi_status_t +setup_efi_pci32(struct boot_params *params, void **pci_handle, + unsigned long size) +{ + efi_pci_io_protocol_32 *pci = NULL; + efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; + u32 *handles = (u32 *)(unsigned long)pci_handle; + efi_status_t status; + unsigned long nr_pci; + struct setup_data *data; + int i; - rom->data.type = SETUP_PCI; - rom->data.len = size - sizeof(struct setup_data); - rom->data.next = 0; - rom->pcilen = pci->romsize; + data = (struct setup_data *)(unsigned long)params->hdr.setup_data; - status = efi_call_phys5(pci->pci.read, pci, - EfiPciIoWidthUint16, PCI_VENDOR_ID, - 1, &(rom->vendor)); + while (data && data->next) + data = (struct setup_data *)(unsigned long)data->next; - if (status != EFI_SUCCESS) - goto free_struct; + nr_pci = size / sizeof(u32); + for (i = 0; i < nr_pci; i++) { + struct pci_setup_rom *rom = NULL; + u32 h = handles[i]; - status = efi_call_phys5(pci->pci.read, pci, - EfiPciIoWidthUint16, PCI_DEVICE_ID, - 1, &(rom->devid)); + status = efi_call_early(handle_protocol, h, + &pci_proto, (void **)&pci); if (status != EFI_SUCCESS) - goto free_struct; + continue; - status = efi_call_phys5(pci->get_location, pci, - &(rom->segment), &(rom->bus), - &(rom->device), &(rom->function)); + if (!pci) + continue; + status = __setup_efi_pci32(pci, &rom); if (status != EFI_SUCCESS) - goto free_struct; - - memcpy(rom->romdata, pci->romimage, pci->romsize); + continue; if (data) data->next = (unsigned long)rom; @@ -154,105 +408,155 @@ static efi_status_t setup_efi_pci(struct boot_params *params) data = (struct setup_data *)rom; - continue; - free_struct: - efi_call_phys1(sys_table->boottime->free_pool, rom); } -free_handle: - efi_call_phys1(sys_table->boottime->free_pool, pci_handle); return status; } -/* - * See if we have Graphics Output Protocol - */ -static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto, - unsigned long size) +static efi_status_t +__setup_efi_pci64(efi_pci_io_protocol_64 *pci, struct pci_setup_rom **__rom) { - struct efi_graphics_output_protocol *gop, *first_gop; - struct efi_pixel_bitmask pixel_info; - unsigned long nr_gops; + struct pci_setup_rom *rom; efi_status_t status; - void **gop_handle; - u16 width, height; - u32 fb_base, fb_size; - u32 pixels_per_scan_line; - int pixel_format; - int i; + unsigned long size; + uint64_t attributes; - status = efi_call_phys3(sys_table->boottime->allocate_pool, - EFI_LOADER_DATA, size, &gop_handle); + status = efi_early->call(pci->attributes, pci, + EfiPciIoAttributeOperationGet, 0, + &attributes); if (status != EFI_SUCCESS) return status; - status = efi_call_phys5(sys_table->boottime->locate_handle, - EFI_LOCATE_BY_PROTOCOL, proto, - NULL, &size, gop_handle); + if (!pci->romimage || !pci->romsize) + return EFI_INVALID_PARAMETER; + + size = pci->romsize + sizeof(*rom); + + status = efi_call_early(allocate_pool, EFI_LOADER_DATA, size, &rom); if (status != EFI_SUCCESS) - goto free_handle; + return status; - first_gop = NULL; + rom->data.type = SETUP_PCI; + rom->data.len = size - sizeof(struct setup_data); + rom->data.next = 0; + rom->pcilen = pci->romsize; + *__rom = rom; - nr_gops = size / sizeof(void *); - for (i = 0; i < nr_gops; i++) { - struct efi_graphics_output_mode_info *info; - efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID; - bool conout_found = false; - void *dummy; - void *h = gop_handle[i]; + status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16, + PCI_VENDOR_ID, 1, &(rom->vendor)); + + if (status != EFI_SUCCESS) + goto free_struct; + + status = efi_early->call(pci->pci.read, pci, EfiPciIoWidthUint16, + PCI_DEVICE_ID, 1, &(rom->devid)); + + if (status != EFI_SUCCESS) + goto free_struct; + + status = efi_early->call(pci->get_location, pci, &(rom->segment), + &(rom->bus), &(rom->device), &(rom->function)); + + if (status != EFI_SUCCESS) + goto free_struct; + + memcpy(rom->romdata, pci->romimage, pci->romsize); + return status; + +free_struct: + efi_call_early(free_pool, rom); + return status; + +} + +static efi_status_t +setup_efi_pci64(struct boot_params *params, void **pci_handle, + unsigned long size) +{ + efi_pci_io_protocol_64 *pci = NULL; + efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; + u64 *handles = (u64 *)(unsigned long)pci_handle; + efi_status_t status; + unsigned long nr_pci; + struct setup_data *data; + int i; + + data = (struct setup_data *)(unsigned long)params->hdr.setup_data; + + while (data && data->next) + data = (struct setup_data *)(unsigned long)data->next; + + nr_pci = size / sizeof(u64); + for (i = 0; i < nr_pci; i++) { + struct pci_setup_rom *rom = NULL; + u64 h = handles[i]; + + status = efi_call_early(handle_protocol, h, + &pci_proto, (void **)&pci); - status = efi_call_phys3(sys_table->boottime->handle_protocol, - h, proto, &gop); if (status != EFI_SUCCESS) continue; - status = efi_call_phys3(sys_table->boottime->handle_protocol, - h, &conout_proto, &dummy); + if (!pci) + continue; - if (status == EFI_SUCCESS) - conout_found = true; + status = __setup_efi_pci64(pci, &rom); + if (status != EFI_SUCCESS) + continue; - status = efi_call_phys4(gop->query_mode, gop, - gop->mode->mode, &size, &info); - if (status == EFI_SUCCESS && (!first_gop || conout_found)) { - /* - * Systems that use the UEFI Console Splitter may - * provide multiple GOP devices, not all of which are - * backed by real hardware. The workaround is to search - * for a GOP implementing the ConOut protocol, and if - * one isn't found, to just fall back to the first GOP. - */ - width = info->horizontal_resolution; - height = info->vertical_resolution; - fb_base = gop->mode->frame_buffer_base; - fb_size = gop->mode->frame_buffer_size; - pixel_format = info->pixel_format; - pixel_info = info->pixel_information; - pixels_per_scan_line = info->pixels_per_scan_line; + if (data) + data->next = (unsigned long)rom; + else + params->hdr.setup_data = (unsigned long)rom; + + data = (struct setup_data *)rom; - /* - * Once we've found a GOP supporting ConOut, - * don't bother looking any further. - */ - first_gop = gop; - if (conout_found) - break; - } } - /* Did we find any GOPs? */ - if (!first_gop) + return status; +} + +static efi_status_t setup_efi_pci(struct boot_params *params) +{ + efi_status_t status; + void **pci_handle = NULL; + efi_guid_t pci_proto = EFI_PCI_IO_PROTOCOL_GUID; + unsigned long size = 0; + + status = efi_call_early(locate_handle, + EFI_LOCATE_BY_PROTOCOL, + &pci_proto, NULL, &size, pci_handle); + + if (status == EFI_BUFFER_TOO_SMALL) { + status = efi_call_early(allocate_pool, + EFI_LOADER_DATA, + size, (void **)&pci_handle); + + if (status != EFI_SUCCESS) + return status; + + status = efi_call_early(locate_handle, + EFI_LOCATE_BY_PROTOCOL, &pci_proto, + NULL, &size, pci_handle); + } + + if (status != EFI_SUCCESS) goto free_handle; - /* EFI framebuffer */ - si->orig_video_isVGA = VIDEO_TYPE_EFI; + if (efi_early->is64) + status = setup_efi_pci64(params, pci_handle, size); + else + status = setup_efi_pci32(params, pci_handle, size); - si->lfb_width = width; - si->lfb_height = height; - si->lfb_base = fb_base; - si->pages = 1; +free_handle: + efi_call_early(free_pool, pci_handle); + return status; +} +static void +setup_pixel_info(struct screen_info *si, u32 pixels_per_scan_line, + struct efi_pixel_bitmask pixel_info, int pixel_format) +{ if (pixel_format == PIXEL_RGB_RESERVED_8BIT_PER_COLOR) { si->lfb_depth = 32; si->lfb_linelength = pixels_per_scan_line * 4; @@ -297,62 +601,319 @@ static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto, si->rsvd_size = 0; si->rsvd_pos = 0; } +} + +static efi_status_t +__gop_query32(struct efi_graphics_output_protocol_32 *gop32, + struct efi_graphics_output_mode_info **info, + unsigned long *size, u32 *fb_base) +{ + struct efi_graphics_output_protocol_mode_32 *mode; + efi_status_t status; + unsigned long m; + + m = gop32->mode; + mode = (struct efi_graphics_output_protocol_mode_32 *)m; + + status = efi_early->call(gop32->query_mode, gop32, + mode->mode, size, info); + if (status != EFI_SUCCESS) + return status; + + *fb_base = mode->frame_buffer_base; + return status; +} + +static efi_status_t +setup_gop32(struct screen_info *si, efi_guid_t *proto, + unsigned long size, void **gop_handle) +{ + struct efi_graphics_output_protocol_32 *gop32, *first_gop; + unsigned long nr_gops; + u16 width, height; + u32 pixels_per_scan_line; + u32 fb_base; + struct efi_pixel_bitmask pixel_info; + int pixel_format; + efi_status_t status; + u32 *handles = (u32 *)(unsigned long)gop_handle; + int i; + + first_gop = NULL; + gop32 = NULL; + + nr_gops = size / sizeof(u32); + for (i = 0; i < nr_gops; i++) { + struct efi_graphics_output_mode_info *info = NULL; + efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID; + bool conout_found = false; + void *dummy = NULL; + u32 h = handles[i]; + + status = efi_call_early(handle_protocol, h, + proto, (void **)&gop32); + if (status != EFI_SUCCESS) + continue; + + status = efi_call_early(handle_protocol, h, + &conout_proto, &dummy); + if (status == EFI_SUCCESS) + conout_found = true; + + status = __gop_query32(gop32, &info, &size, &fb_base); + if (status == EFI_SUCCESS && (!first_gop || conout_found)) { + /* + * Systems that use the UEFI Console Splitter may + * provide multiple GOP devices, not all of which are + * backed by real hardware. The workaround is to search + * for a GOP implementing the ConOut protocol, and if + * one isn't found, to just fall back to the first GOP. + */ + width = info->horizontal_resolution; + height = info->vertical_resolution; + pixel_format = info->pixel_format; + pixel_info = info->pixel_information; + pixels_per_scan_line = info->pixels_per_scan_line; + + /* + * Once we've found a GOP supporting ConOut, + * don't bother looking any further. + */ + first_gop = gop32; + if (conout_found) + break; + } + } + + /* Did we find any GOPs? */ + if (!first_gop) + goto out; + + /* EFI framebuffer */ + si->orig_video_isVGA = VIDEO_TYPE_EFI; + + si->lfb_width = width; + si->lfb_height = height; + si->lfb_base = fb_base; + si->pages = 1; + + setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format); si->lfb_size = si->lfb_linelength * si->lfb_height; si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS; +out: + return status; +} -free_handle: - efi_call_phys1(sys_table->boottime->free_pool, gop_handle); +static efi_status_t +__gop_query64(struct efi_graphics_output_protocol_64 *gop64, + struct efi_graphics_output_mode_info **info, + unsigned long *size, u32 *fb_base) +{ + struct efi_graphics_output_protocol_mode_64 *mode; + efi_status_t status; + unsigned long m; + + m = gop64->mode; + mode = (struct efi_graphics_output_protocol_mode_64 *)m; + + status = efi_early->call(gop64->query_mode, gop64, + mode->mode, size, info); + if (status != EFI_SUCCESS) + return status; + + *fb_base = mode->frame_buffer_base; + return status; +} + +static efi_status_t +setup_gop64(struct screen_info *si, efi_guid_t *proto, + unsigned long size, void **gop_handle) +{ + struct efi_graphics_output_protocol_64 *gop64, *first_gop; + unsigned long nr_gops; + u16 width, height; + u32 pixels_per_scan_line; + u32 fb_base; + struct efi_pixel_bitmask pixel_info; + int pixel_format; + efi_status_t status; + u64 *handles = (u64 *)(unsigned long)gop_handle; + int i; + + first_gop = NULL; + gop64 = NULL; + + nr_gops = size / sizeof(u64); + for (i = 0; i < nr_gops; i++) { + struct efi_graphics_output_mode_info *info = NULL; + efi_guid_t conout_proto = EFI_CONSOLE_OUT_DEVICE_GUID; + bool conout_found = false; + void *dummy = NULL; + u64 h = handles[i]; + + status = efi_call_early(handle_protocol, h, + proto, (void **)&gop64); + if (status != EFI_SUCCESS) + continue; + + status = efi_call_early(handle_protocol, h, + &conout_proto, &dummy); + if (status == EFI_SUCCESS) + conout_found = true; + + status = __gop_query64(gop64, &info, &size, &fb_base); + if (status == EFI_SUCCESS && (!first_gop || conout_found)) { + /* + * Systems that use the UEFI Console Splitter may + * provide multiple GOP devices, not all of which are + * backed by real hardware. The workaround is to search + * for a GOP implementing the ConOut protocol, and if + * one isn't found, to just fall back to the first GOP. + */ + width = info->horizontal_resolution; + height = info->vertical_resolution; + pixel_format = info->pixel_format; + pixel_info = info->pixel_information; + pixels_per_scan_line = info->pixels_per_scan_line; + + /* + * Once we've found a GOP supporting ConOut, + * don't bother looking any further. + */ + first_gop = gop64; + if (conout_found) + break; + } + } + + /* Did we find any GOPs? */ + if (!first_gop) + goto out; + + /* EFI framebuffer */ + si->orig_video_isVGA = VIDEO_TYPE_EFI; + + si->lfb_width = width; + si->lfb_height = height; + si->lfb_base = fb_base; + si->pages = 1; + + setup_pixel_info(si, pixels_per_scan_line, pixel_info, pixel_format); + + si->lfb_size = si->lfb_linelength * si->lfb_height; + + si->capabilities |= VIDEO_CAPABILITY_SKIP_QUIRKS; +out: return status; } /* - * See if we have Universal Graphics Adapter (UGA) protocol + * See if we have Graphics Output Protocol */ -static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto, +static efi_status_t setup_gop(struct screen_info *si, efi_guid_t *proto, unsigned long size) { - struct efi_uga_draw_protocol *uga, *first_uga; - unsigned long nr_ugas; efi_status_t status; - u32 width, height; - void **uga_handle = NULL; - int i; + void **gop_handle = NULL; - status = efi_call_phys3(sys_table->boottime->allocate_pool, - EFI_LOADER_DATA, size, &uga_handle); + status = efi_call_early(allocate_pool, EFI_LOADER_DATA, + size, (void **)&gop_handle); if (status != EFI_SUCCESS) return status; - status = efi_call_phys5(sys_table->boottime->locate_handle, - EFI_LOCATE_BY_PROTOCOL, uga_proto, - NULL, &size, uga_handle); + status = efi_call_early(locate_handle, + EFI_LOCATE_BY_PROTOCOL, + proto, NULL, &size, gop_handle); if (status != EFI_SUCCESS) goto free_handle; + if (efi_early->is64) + status = setup_gop64(si, proto, size, gop_handle); + else + status = setup_gop32(si, proto, size, gop_handle); + +free_handle: + efi_call_early(free_pool, gop_handle); + return status; +} + +static efi_status_t +setup_uga32(void **uga_handle, unsigned long size, u32 *width, u32 *height) +{ + struct efi_uga_draw_protocol *uga = NULL, *first_uga; + efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID; + unsigned long nr_ugas; + u32 *handles = (u32 *)uga_handle;; + efi_status_t status; + int i; + first_uga = NULL; + nr_ugas = size / sizeof(u32); + for (i = 0; i < nr_ugas; i++) { + efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID; + u32 w, h, depth, refresh; + void *pciio; + u32 handle = handles[i]; - nr_ugas = size / sizeof(void *); + status = efi_call_early(handle_protocol, handle, + &uga_proto, (void **)&uga); + if (status != EFI_SUCCESS) + continue; + + efi_call_early(handle_protocol, handle, &pciio_proto, &pciio); + + status = efi_early->call((unsigned long)uga->get_mode, uga, + &w, &h, &depth, &refresh); + if (status == EFI_SUCCESS && (!first_uga || pciio)) { + *width = w; + *height = h; + + /* + * Once we've found a UGA supporting PCIIO, + * don't bother looking any further. + */ + if (pciio) + break; + + first_uga = uga; + } + } + + return status; +} + +static efi_status_t +setup_uga64(void **uga_handle, unsigned long size, u32 *width, u32 *height) +{ + struct efi_uga_draw_protocol *uga = NULL, *first_uga; + efi_guid_t uga_proto = EFI_UGA_PROTOCOL_GUID; + unsigned long nr_ugas; + u64 *handles = (u64 *)uga_handle;; + efi_status_t status; + int i; + + first_uga = NULL; + nr_ugas = size / sizeof(u64); for (i = 0; i < nr_ugas; i++) { efi_guid_t pciio_proto = EFI_PCI_IO_PROTOCOL_GUID; - void *handle = uga_handle[i]; u32 w, h, depth, refresh; void *pciio; + u64 handle = handles[i]; - status = efi_call_phys3(sys_table->boottime->handle_protocol, - handle, uga_proto, &uga); + status = efi_call_early(handle_protocol, handle, + &uga_proto, (void **)&uga); if (status != EFI_SUCCESS) continue; - efi_call_phys3(sys_table->boottime->handle_protocol, - handle, &pciio_proto, &pciio); + efi_call_early(handle_protocol, handle, &pciio_proto, &pciio); - status = efi_call_phys5(uga->get_mode, uga, &w, &h, - &depth, &refresh); + status = efi_early->call((unsigned long)uga->get_mode, uga, + &w, &h, &depth, &refresh); if (status == EFI_SUCCESS && (!first_uga || pciio)) { - width = w; - height = h; + *width = w; + *height = h; /* * Once we've found a UGA supporting PCIIO, @@ -365,7 +926,39 @@ static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto, } } - if (!first_uga) + return status; +} + +/* + * See if we have Universal Graphics Adapter (UGA) protocol + */ +static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto, + unsigned long size) +{ + efi_status_t status; + u32 width, height; + void **uga_handle = NULL; + + status = efi_call_early(allocate_pool, EFI_LOADER_DATA, + size, (void **)&uga_handle); + if (status != EFI_SUCCESS) + return status; + + status = efi_call_early(locate_handle, + EFI_LOCATE_BY_PROTOCOL, + uga_proto, NULL, &size, uga_handle); + if (status != EFI_SUCCESS) + goto free_handle; + + height = 0; + width = 0; + + if (efi_early->is64) + status = setup_uga64(uga_handle, size, &width, &height); + else + status = setup_uga32(uga_handle, size, &width, &height); + + if (!width && !height) goto free_handle; /* EFI framebuffer */ @@ -384,9 +977,8 @@ static efi_status_t setup_uga(struct screen_info *si, efi_guid_t *uga_proto, si->rsvd_size = 8; si->rsvd_pos = 24; - free_handle: - efi_call_phys1(sys_table->boottime->free_pool, uga_handle); + efi_call_early(free_pool, uga_handle); return status; } @@ -404,29 +996,31 @@ void setup_graphics(struct boot_params *boot_params) memset(si, 0, sizeof(*si)); size = 0; - status = efi_call_phys5(sys_table->boottime->locate_handle, - EFI_LOCATE_BY_PROTOCOL, &graphics_proto, - NULL, &size, gop_handle); + status = efi_call_early(locate_handle, + EFI_LOCATE_BY_PROTOCOL, + &graphics_proto, NULL, &size, gop_handle); if (status == EFI_BUFFER_TOO_SMALL) status = setup_gop(si, &graphics_proto, size); if (status != EFI_SUCCESS) { size = 0; - status = efi_call_phys5(sys_table->boottime->locate_handle, - EFI_LOCATE_BY_PROTOCOL, &uga_proto, - NULL, &size, uga_handle); + status = efi_call_early(locate_handle, + EFI_LOCATE_BY_PROTOCOL, + &uga_proto, NULL, &size, uga_handle); if (status == EFI_BUFFER_TOO_SMALL) setup_uga(si, &uga_proto, size); } } - /* * Because the x86 boot code expects to be passed a boot_params we * need to create one ourselves (usually the bootloader would create * one for us). + * + * The caller is responsible for filling out ->code32_start in the + * returned boot_params. */ -struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table) +struct boot_params *make_boot_params(struct efi_config *c) { struct boot_params *boot_params; struct sys_desc_table *sdt; @@ -434,7 +1028,7 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table) struct setup_header *hdr; struct efi_info *efi; efi_loaded_image_t *image; - void *options; + void *options, *handle; efi_guid_t proto = LOADED_IMAGE_PROTOCOL_GUID; int options_size = 0; efi_status_t status; @@ -445,14 +1039,21 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table) unsigned long ramdisk_addr; unsigned long ramdisk_size; - sys_table = _table; + efi_early = c; + sys_table = (efi_system_table_t *)(unsigned long)efi_early->table; + handle = (void *)(unsigned long)efi_early->image_handle; /* Check if we were booted by the EFI firmware */ if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) return NULL; - status = efi_call_phys3(sys_table->boottime->handle_protocol, - handle, &proto, (void *)&image); + if (efi_early->is64) + setup_boot_services64(efi_early); + else + setup_boot_services32(efi_early); + + status = efi_call_early(handle_protocol, handle, + &proto, (void *)&image); if (status != EFI_SUCCESS) { efi_printk(sys_table, "Failed to get handle for LOADED_IMAGE_PROTOCOL\n"); return NULL; @@ -483,13 +1084,10 @@ struct boot_params *make_boot_params(void *handle, efi_system_table_t *_table) hdr->vid_mode = 0xffff; hdr->boot_flag = 0xAA55; - hdr->code32_start = (__u64)(unsigned long)image->image_base; - hdr->type_of_loader = 0x21; /* Convert unicode cmdline to ascii */ - cmdline_ptr = efi_convert_cmdline_to_ascii(sys_table, image, - &options_size); + cmdline_ptr = efi_convert_cmdline(sys_table, image, &options_size); if (!cmdline_ptr) goto fail; hdr->cmd_line_ptr = (unsigned long)cmdline_ptr; @@ -641,14 +1239,13 @@ static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext, sizeof(struct e820entry) * nr_desc; if (*e820ext) { - efi_call_phys1(sys_table->boottime->free_pool, *e820ext); + efi_call_early(free_pool, *e820ext); *e820ext = NULL; *e820ext_size = 0; } - status = efi_call_phys3(sys_table->boottime->allocate_pool, - EFI_LOADER_DATA, size, e820ext); - + status = efi_call_early(allocate_pool, EFI_LOADER_DATA, + size, (void **)e820ext); if (status == EFI_SUCCESS) *e820ext_size = size; @@ -656,12 +1253,13 @@ static efi_status_t alloc_e820ext(u32 nr_desc, struct setup_data **e820ext, } static efi_status_t exit_boot(struct boot_params *boot_params, - void *handle) + void *handle, bool is64) { struct efi_info *efi = &boot_params->efi_info; unsigned long map_sz, key, desc_size; efi_memory_desc_t *mem_map; struct setup_data *e820ext; + const char *signature; __u32 e820ext_size; __u32 nr_desc, prev_nr_desc; efi_status_t status; @@ -691,11 +1289,13 @@ get_map: if (status != EFI_SUCCESS) goto free_mem_map; - efi_call_phys1(sys_table->boottime->free_pool, mem_map); + efi_call_early(free_pool, mem_map); goto get_map; /* Allocated memory, get map again */ } - memcpy(&efi->efi_loader_signature, EFI_LOADER_SIGNATURE, sizeof(__u32)); + signature = is64 ? EFI64_LOADER_SIGNATURE : EFI32_LOADER_SIGNATURE; + memcpy(&efi->efi_loader_signature, signature, sizeof(__u32)); + efi->efi_systab = (unsigned long)sys_table; efi->efi_memdesc_size = desc_size; efi->efi_memdesc_version = desc_version; @@ -708,8 +1308,7 @@ get_map: #endif /* Might as well exit boot services now */ - status = efi_call_phys2(sys_table->boottime->exit_boot_services, - handle, key); + status = efi_call_early(exit_boot_services, handle, key); if (status != EFI_SUCCESS) { /* * ExitBootServices() will fail if any of the event @@ -722,7 +1321,7 @@ get_map: goto free_mem_map; called_exit = true; - efi_call_phys1(sys_table->boottime->free_pool, mem_map); + efi_call_early(free_pool, mem_map); goto get_map; } @@ -736,23 +1335,31 @@ get_map: return EFI_SUCCESS; free_mem_map: - efi_call_phys1(sys_table->boottime->free_pool, mem_map); + efi_call_early(free_pool, mem_map); return status; } - /* * On success we return a pointer to a boot_params structure, and NULL * on failure. */ -struct boot_params *efi_main(void *handle, efi_system_table_t *_table, +struct boot_params *efi_main(struct efi_config *c, struct boot_params *boot_params) { - struct desc_ptr *gdt; + struct desc_ptr *gdt = NULL; efi_loaded_image_t *image; struct setup_header *hdr = &boot_params->hdr; efi_status_t status; struct desc_struct *desc; + void *handle; + efi_system_table_t *_table; + bool is64; + + efi_early = c; + + _table = (efi_system_table_t *)(unsigned long)efi_early->table; + handle = (void *)(unsigned long)efi_early->image_handle; + is64 = efi_early->is64; sys_table = _table; @@ -760,13 +1367,17 @@ struct boot_params *efi_main(void *handle, efi_system_table_t *_table, if (sys_table->hdr.signature != EFI_SYSTEM_TABLE_SIGNATURE) goto fail; + if (is64) + setup_boot_services64(efi_early); + else + setup_boot_services32(efi_early); + setup_graphics(boot_params); setup_efi_pci(boot_params); - status = efi_call_phys3(sys_table->boottime->allocate_pool, - EFI_LOADER_DATA, sizeof(*gdt), - (void **)&gdt); + status = efi_call_early(allocate_pool, EFI_LOADER_DATA, + sizeof(*gdt), (void **)&gdt); if (status != EFI_SUCCESS) { efi_printk(sys_table, "Failed to alloc mem for gdt structure\n"); goto fail; @@ -797,7 +1408,7 @@ struct boot_params *efi_main(void *handle, efi_system_table_t *_table, hdr->code32_start = bzimage_addr; } - status = exit_boot(boot_params, handle); + status = exit_boot(boot_params, handle, is64); if (status != EFI_SUCCESS) goto fail; diff --git a/arch/x86/boot/compressed/eboot.h b/arch/x86/boot/compressed/eboot.h index 81b6b652b46a..c88c31ecad12 100644 --- a/arch/x86/boot/compressed/eboot.h +++ b/arch/x86/boot/compressed/eboot.h @@ -37,6 +37,24 @@ struct efi_graphics_output_mode_info { u32 pixels_per_scan_line; } __packed; +struct efi_graphics_output_protocol_mode_32 { + u32 max_mode; + u32 mode; + u32 info; + u32 size_of_info; + u64 frame_buffer_base; + u32 frame_buffer_size; +} __packed; + +struct efi_graphics_output_protocol_mode_64 { + u32 max_mode; + u32 mode; + u64 info; + u64 size_of_info; + u64 frame_buffer_base; + u64 frame_buffer_size; +} __packed; + struct efi_graphics_output_protocol_mode { u32 max_mode; u32 mode; @@ -46,6 +64,20 @@ struct efi_graphics_output_protocol_mode { unsigned long frame_buffer_size; } __packed; +struct efi_graphics_output_protocol_32 { + u32 query_mode; + u32 set_mode; + u32 blt; + u32 mode; +}; + +struct efi_graphics_output_protocol_64 { + u64 query_mode; + u64 set_mode; + u64 blt; + u64 mode; +}; + struct efi_graphics_output_protocol { void *query_mode; unsigned long set_mode; @@ -53,10 +85,38 @@ struct efi_graphics_output_protocol { struct efi_graphics_output_protocol_mode *mode; }; +struct efi_uga_draw_protocol_32 { + u32 get_mode; + u32 set_mode; + u32 blt; +}; + +struct efi_uga_draw_protocol_64 { + u64 get_mode; + u64 set_mode; + u64 blt; +}; + struct efi_uga_draw_protocol { void *get_mode; void *set_mode; void *blt; }; +struct efi_config { + u64 image_handle; + u64 table; + u64 allocate_pool; + u64 allocate_pages; + u64 get_memory_map; + u64 free_pool; + u64 free_pages; + u64 locate_handle; + u64 handle_protocol; + u64 exit_boot_services; + u64 text_output; + efi_status_t (*call)(unsigned long, ...); + bool is64; +} __packed; + #endif /* BOOT_COMPRESSED_EBOOT_H */ diff --git a/arch/x86/boot/compressed/efi_stub_64.S b/arch/x86/boot/compressed/efi_stub_64.S index cedc60de86eb..7ff3632806b1 100644 --- a/arch/x86/boot/compressed/efi_stub_64.S +++ b/arch/x86/boot/compressed/efi_stub_64.S @@ -1 +1,30 @@ +#include <asm/segment.h> +#include <asm/msr.h> +#include <asm/processor-flags.h> + #include "../../platform/efi/efi_stub_64.S" + +#ifdef CONFIG_EFI_MIXED + .code64 + .text +ENTRY(efi64_thunk) + push %rbp + push %rbx + + subq $16, %rsp + leaq efi_exit32(%rip), %rax + movl %eax, 8(%rsp) + leaq efi_gdt64(%rip), %rax + movl %eax, 4(%rsp) + movl %eax, 2(%rax) /* Fixup the gdt base address */ + leaq efi32_boot_gdt(%rip), %rax + movl %eax, (%rsp) + + call __efi64_thunk + + addq $16, %rsp + pop %rbx + pop %rbp + ret +ENDPROC(efi64_thunk) +#endif /* CONFIG_EFI_MIXED */ diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S index 5d6f6891b188..cbed1407a5cd 100644 --- a/arch/x86/boot/compressed/head_32.S +++ b/arch/x86/boot/compressed/head_32.S @@ -42,33 +42,56 @@ ENTRY(startup_32) ENTRY(efi_pe_entry) add $0x4, %esp + call 1f +1: popl %esi + subl $1b, %esi + + popl %ecx + movl %ecx, efi32_config(%esi) /* Handle */ + popl %ecx + movl %ecx, efi32_config+8(%esi) /* EFI System table pointer */ + + /* Relocate efi_config->call() */ + leal efi32_config(%esi), %eax + add %esi, 88(%eax) + pushl %eax + call make_boot_params cmpl $0, %eax - je 1f - movl 0x4(%esp), %esi - movl (%esp), %ecx + je fail + movl %esi, BP_code32_start(%eax) + popl %ecx pushl %eax - pushl %esi pushl %ecx - sub $0x4, %esp + jmp 2f /* Skip efi_config initialization */ -ENTRY(efi_stub_entry) +ENTRY(efi32_stub_entry) add $0x4, %esp + popl %ecx + popl %edx + + call 1f +1: popl %esi + subl $1b, %esi + + movl %ecx, efi32_config(%esi) /* Handle */ + movl %edx, efi32_config+8(%esi) /* EFI System table pointer */ + + /* Relocate efi_config->call() */ + leal efi32_config(%esi), %eax + add %esi, 88(%eax) + pushl %eax +2: call efi_main cmpl $0, %eax movl %eax, %esi jne 2f -1: +fail: /* EFI init failed, so hang. */ hlt - jmp 1b + jmp fail 2: - call 3f -3: - popl %eax - subl $3b, %eax - subl BP_pref_address(%esi), %eax - add BP_code32_start(%esi), %eax + movl BP_code32_start(%esi), %eax leal preferred_addr(%eax), %eax jmp *%eax @@ -117,9 +140,11 @@ preferred_addr: addl %eax, %ebx notl %eax andl %eax, %ebx -#else - movl $LOAD_PHYSICAL_ADDR, %ebx + cmpl $LOAD_PHYSICAL_ADDR, %ebx + jge 1f #endif + movl $LOAD_PHYSICAL_ADDR, %ebx +1: /* Target address to relocate to for decompression */ addl $z_extract_offset, %ebx @@ -191,14 +216,23 @@ relocated: leal boot_heap(%ebx), %eax pushl %eax /* heap area */ pushl %esi /* real mode pointer */ - call decompress_kernel + call decompress_kernel /* returns kernel location in %eax */ addl $24, %esp /* * Jump to the decompressed kernel. */ xorl %ebx, %ebx - jmp *%ebp + jmp *%eax + +#ifdef CONFIG_EFI_STUB + .data +efi32_config: + .fill 11,8,0 + .long efi_call_phys + .long 0 + .byte 0 +#endif /* * Stack and heap for uncompression diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S index c337422b575d..2884e0c3e8a5 100644 --- a/arch/x86/boot/compressed/head_64.S +++ b/arch/x86/boot/compressed/head_64.S @@ -94,9 +94,11 @@ ENTRY(startup_32) addl %eax, %ebx notl %eax andl %eax, %ebx -#else - movl $LOAD_PHYSICAL_ADDR, %ebx + cmpl $LOAD_PHYSICAL_ADDR, %ebx + jge 1f #endif + movl $LOAD_PHYSICAL_ADDR, %ebx +1: /* Target address to relocate to for decompression */ addl $z_extract_offset, %ebx @@ -111,7 +113,8 @@ ENTRY(startup_32) lgdt gdt(%ebp) /* Enable PAE mode */ - movl $(X86_CR4_PAE), %eax + movl %cr4, %eax + orl $X86_CR4_PAE, %eax movl %eax, %cr4 /* @@ -176,6 +179,13 @@ ENTRY(startup_32) */ pushl $__KERNEL_CS leal startup_64(%ebp), %eax +#ifdef CONFIG_EFI_MIXED + movl efi32_config(%ebp), %ebx + cmp $0, %ebx + jz 1f + leal handover_entry(%ebp), %eax +1: +#endif pushl %eax /* Enter paged protected Mode, activating Long Mode */ @@ -186,6 +196,30 @@ ENTRY(startup_32) lret ENDPROC(startup_32) +#ifdef CONFIG_EFI_MIXED + .org 0x190 +ENTRY(efi32_stub_entry) + add $0x4, %esp /* Discard return address */ + popl %ecx + popl %edx + popl %esi + + leal (BP_scratch+4)(%esi), %esp + call 1f +1: pop %ebp + subl $1b, %ebp + + movl %ecx, efi32_config(%ebp) + movl %edx, efi32_config+8(%ebp) + sgdtl efi32_boot_gdt(%ebp) + + leal efi32_config(%ebp), %eax + movl %eax, efi_config(%ebp) + + jmp startup_32 +ENDPROC(efi32_stub_entry) +#endif + .code64 .org 0x200 ENTRY(startup_64) @@ -207,33 +241,52 @@ ENTRY(startup_64) jmp preferred_addr ENTRY(efi_pe_entry) - mov %rcx, %rdi - mov %rdx, %rsi - pushq %rdi - pushq %rsi + movq %rcx, efi64_config(%rip) /* Handle */ + movq %rdx, efi64_config+8(%rip) /* EFI System table pointer */ + + leaq efi64_config(%rip), %rax + movq %rax, efi_config(%rip) + + call 1f +1: popq %rbp + subq $1b, %rbp + + /* + * Relocate efi_config->call(). + */ + addq %rbp, efi64_config+88(%rip) + + movq %rax, %rdi call make_boot_params cmpq $0,%rax - je 1f - mov %rax, %rdx - popq %rsi - popq %rdi + je fail + mov %rax, %rsi + leaq startup_32(%rip), %rax + movl %eax, BP_code32_start(%rsi) + jmp 2f /* Skip the relocation */ + +handover_entry: + call 1f +1: popq %rbp + subq $1b, %rbp -ENTRY(efi_stub_entry) + /* + * Relocate efi_config->call(). + */ + movq efi_config(%rip), %rax + addq %rbp, 88(%rax) +2: + movq efi_config(%rip), %rdi call efi_main movq %rax,%rsi cmpq $0,%rax jne 2f -1: +fail: /* EFI init failed, so hang. */ hlt - jmp 1b + jmp fail 2: - call 3f -3: - popq %rax - subq $3b, %rax - subq BP_pref_address(%rsi), %rax - add BP_code32_start(%esi), %eax + movl BP_code32_start(%esi), %eax leaq preferred_addr(%rax), %rax jmp *%rax @@ -269,9 +322,11 @@ preferred_addr: addq %rax, %rbp notq %rax andq %rax, %rbp -#else - movq $LOAD_PHYSICAL_ADDR, %rbp + cmpq $LOAD_PHYSICAL_ADDR, %rbp + jge 1f #endif + movq $LOAD_PHYSICAL_ADDR, %rbp +1: /* Target address to relocate to for decompression */ leaq z_extract_offset(%rbp), %rbx @@ -303,6 +358,20 @@ preferred_addr: leaq relocated(%rbx), %rax jmp *%rax +#ifdef CONFIG_EFI_STUB + .org 0x390 +ENTRY(efi64_stub_entry) + movq %rdi, efi64_config(%rip) /* Handle */ + movq %rsi, efi64_config+8(%rip) /* EFI System table pointer */ + + leaq efi64_config(%rip), %rax + movq %rax, efi_config(%rip) + + movq %rdx, %rsi + jmp handover_entry +ENDPROC(efi64_stub_entry) +#endif + .text relocated: @@ -339,13 +408,13 @@ relocated: movl $z_input_len, %ecx /* input_len */ movq %rbp, %r8 /* output target address */ movq $z_output_len, %r9 /* decompressed length */ - call decompress_kernel + call decompress_kernel /* returns kernel location in %rax */ popq %rsi /* * Jump to the decompressed kernel. */ - jmp *%rbp + jmp *%rax .code32 no_longmode: @@ -368,6 +437,25 @@ gdt: .quad 0x0000000000000000 /* TS continued */ gdt_end: +#ifdef CONFIG_EFI_STUB +efi_config: + .quad 0 + +#ifdef CONFIG_EFI_MIXED + .global efi32_config +efi32_config: + .fill 11,8,0 + .quad efi64_thunk + .byte 0 +#endif + + .global efi64_config +efi64_config: + .fill 11,8,0 + .quad efi_call + .byte 1 +#endif /* CONFIG_EFI_STUB */ + /* * Stack and heap for uncompression */ diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c index 434f077d2c4d..57ab74df7eea 100644 --- a/arch/x86/boot/compressed/misc.c +++ b/arch/x86/boot/compressed/misc.c @@ -10,6 +10,7 @@ */ #include "misc.h" +#include "../string.h" /* WARNING!! * This code is compiled with -fPIC and it is relocated dynamically @@ -97,8 +98,14 @@ */ #define STATIC static -#undef memset #undef memcpy + +/* + * Use a normal definition of memset() from string.c. There are already + * included header files which expect a definition of memset() and by + * the time we define memset macro, it is too late. + */ +#undef memset #define memzero(s, n) memset((s), 0, (n)) @@ -109,17 +116,8 @@ static void error(char *m); */ struct boot_params *real_mode; /* Pointer to real-mode data */ -void *memset(void *s, int c, size_t n); -void *memcpy(void *dest, const void *src, size_t n); - -#ifdef CONFIG_X86_64 -#define memptr long -#else -#define memptr unsigned -#endif - -static memptr free_mem_ptr; -static memptr free_mem_end_ptr; +memptr free_mem_ptr; +memptr free_mem_end_ptr; static char *vidmem; static int vidport; @@ -222,45 +220,6 @@ void __putstr(const char *s) outb(0xff & (pos >> 1), vidport+1); } -void *memset(void *s, int c, size_t n) -{ - int i; - char *ss = s; - - for (i = 0; i < n; i++) - ss[i] = c; - return s; -} -#ifdef CONFIG_X86_32 -void *memcpy(void *dest, const void *src, size_t n) -{ - int d0, d1, d2; - asm volatile( - "rep ; movsl\n\t" - "movl %4,%%ecx\n\t" - "rep ; movsb\n\t" - : "=&c" (d0), "=&D" (d1), "=&S" (d2) - : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) - : "memory"); - - return dest; -} -#else -void *memcpy(void *dest, const void *src, size_t n) -{ - long d0, d1, d2; - asm volatile( - "rep ; movsq\n\t" - "movq %4,%%rcx\n\t" - "rep ; movsb\n\t" - : "=&c" (d0), "=&D" (d1), "=&S" (d2) - : "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src) - : "memory"); - - return dest; -} -#endif - static void error(char *x) { error_putstr("\n\n"); @@ -395,7 +354,7 @@ static void parse_elf(void *output) free(phdrs); } -asmlinkage void decompress_kernel(void *rmode, memptr heap, +asmlinkage __visible void *decompress_kernel(void *rmode, memptr heap, unsigned char *input_data, unsigned long input_len, unsigned char *output, @@ -422,6 +381,10 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap, free_mem_ptr = heap; /* Heap */ free_mem_end_ptr = heap + BOOT_HEAP_SIZE; + output = choose_kernel_location(input_data, input_len, + output, output_len); + + /* Validate memory location choices. */ if ((unsigned long)output & (MIN_KERNEL_ALIGN - 1)) error("Destination address inappropriately aligned"); #ifdef CONFIG_X86_64 @@ -441,5 +404,5 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap, parse_elf(output); handle_relocations(output, output_len); debug_putstr("done.\nBooting the kernel.\n"); - return; + return output; } diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h index 674019d8e235..24e3e569a13c 100644 --- a/arch/x86/boot/compressed/misc.h +++ b/arch/x86/boot/compressed/misc.h @@ -23,7 +23,15 @@ #define BOOT_BOOT_H #include "../ctype.h" +#ifdef CONFIG_X86_64 +#define memptr long +#else +#define memptr unsigned +#endif + /* misc.c */ +extern memptr free_mem_ptr; +extern memptr free_mem_end_ptr; extern struct boot_params *real_mode; /* Pointer to real-mode data */ void __putstr(const char *s); #define error_putstr(__x) __putstr(__x) @@ -39,23 +47,40 @@ static inline void debug_putstr(const char *s) #endif -#ifdef CONFIG_EARLY_PRINTK - +#if CONFIG_EARLY_PRINTK || CONFIG_RANDOMIZE_BASE /* cmdline.c */ int cmdline_find_option(const char *option, char *buffer, int bufsize); int cmdline_find_option_bool(const char *option); +#endif -/* early_serial_console.c */ -extern int early_serial_base; -void console_init(void); +#if CONFIG_RANDOMIZE_BASE +/* aslr.c */ +unsigned char *choose_kernel_location(unsigned char *input, + unsigned long input_size, + unsigned char *output, + unsigned long output_size); +/* cpuflags.c */ +bool has_cpuflag(int flag); #else +static inline +unsigned char *choose_kernel_location(unsigned char *input, + unsigned long input_size, + unsigned char *output, + unsigned long output_size) +{ + return output; +} +#endif +#ifdef CONFIG_EARLY_PRINTK /* early_serial_console.c */ +extern int early_serial_base; +void console_init(void); +#else static const int early_serial_base; static inline void console_init(void) { } - #endif #endif diff --git a/arch/x86/boot/compressed/string.c b/arch/x86/boot/compressed/string.c index ffb9c5c9d748..00e788be1db9 100644 --- a/arch/x86/boot/compressed/string.c +++ b/arch/x86/boot/compressed/string.c @@ -1,11 +1,41 @@ -#include "misc.h" +#include "../string.c" -int memcmp(const void *s1, const void *s2, size_t len) +#ifdef CONFIG_X86_32 +void *memcpy(void *dest, const void *src, size_t n) { - u8 diff; - asm("repe; cmpsb; setnz %0" - : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); - return diff; + int d0, d1, d2; + asm volatile( + "rep ; movsl\n\t" + "movl %4,%%ecx\n\t" + "rep ; movsb\n\t" + : "=&c" (d0), "=&D" (d1), "=&S" (d2) + : "0" (n >> 2), "g" (n & 3), "1" (dest), "2" (src) + : "memory"); + + return dest; } +#else +void *memcpy(void *dest, const void *src, size_t n) +{ + long d0, d1, d2; + asm volatile( + "rep ; movsq\n\t" + "movq %4,%%rcx\n\t" + "rep ; movsb\n\t" + : "=&c" (d0), "=&D" (d1), "=&S" (d2) + : "0" (n >> 3), "g" (n & 7), "1" (dest), "2" (src) + : "memory"); -#include "../string.c" + return dest; +} +#endif + +void *memset(void *s, int c, size_t n) +{ + int i; + char *ss = s; + + for (i = 0; i < n; i++) + ss[i] = c; + return s; +} diff --git a/arch/x86/boot/copy.S b/arch/x86/boot/copy.S index 11f272c6f5e9..1eb7d298b47d 100644 --- a/arch/x86/boot/copy.S +++ b/arch/x86/boot/copy.S @@ -14,7 +14,7 @@ * Memory copy routines */ - .code16gcc + .code16 .text GLOBAL(memcpy) @@ -30,7 +30,7 @@ GLOBAL(memcpy) rep; movsb popw %di popw %si - ret + retl ENDPROC(memcpy) GLOBAL(memset) @@ -45,25 +45,25 @@ GLOBAL(memset) andw $3, %cx rep; stosb popw %di - ret + retl ENDPROC(memset) GLOBAL(copy_from_fs) pushw %ds pushw %fs popw %ds - call memcpy + calll memcpy popw %ds - ret + retl ENDPROC(copy_from_fs) GLOBAL(copy_to_fs) pushw %es pushw %fs popw %es - call memcpy + calll memcpy popw %es - ret + retl ENDPROC(copy_to_fs) #if 0 /* Not currently used, but can be enabled as needed */ @@ -71,17 +71,17 @@ GLOBAL(copy_from_gs) pushw %ds pushw %gs popw %ds - call memcpy + calll memcpy popw %ds - ret + retl ENDPROC(copy_from_gs) GLOBAL(copy_to_gs) pushw %es pushw %gs popw %es - call memcpy + calll memcpy popw %es - ret + retl ENDPROC(copy_to_gs) #endif diff --git a/arch/x86/boot/cpucheck.c b/arch/x86/boot/cpucheck.c index 4d3ff037201f..1fd7d575092e 100644 --- a/arch/x86/boot/cpucheck.c +++ b/arch/x86/boot/cpucheck.c @@ -27,9 +27,8 @@ #include <asm/processor-flags.h> #include <asm/required-features.h> #include <asm/msr-index.h> +#include "string.h" -struct cpu_features cpu; -static u32 cpu_vendor[3]; static u32 err_flags[NCAPINTS]; static const int req_level = CONFIG_X86_MINIMUM_CPU_FAMILY; @@ -69,92 +68,15 @@ static int is_transmeta(void) cpu_vendor[2] == A32('M', 'x', '8', '6'); } -static int has_fpu(void) +static int is_intel(void) { - u16 fcw = -1, fsw = -1; - u32 cr0; - - asm("movl %%cr0,%0" : "=r" (cr0)); - if (cr0 & (X86_CR0_EM|X86_CR0_TS)) { - cr0 &= ~(X86_CR0_EM|X86_CR0_TS); - asm volatile("movl %0,%%cr0" : : "r" (cr0)); - } - - asm volatile("fninit ; fnstsw %0 ; fnstcw %1" - : "+m" (fsw), "+m" (fcw)); - - return fsw == 0 && (fcw & 0x103f) == 0x003f; -} - -static int has_eflag(u32 mask) -{ - u32 f0, f1; - - asm("pushfl ; " - "pushfl ; " - "popl %0 ; " - "movl %0,%1 ; " - "xorl %2,%1 ; " - "pushl %1 ; " - "popfl ; " - "pushfl ; " - "popl %1 ; " - "popfl" - : "=&r" (f0), "=&r" (f1) - : "ri" (mask)); - - return !!((f0^f1) & mask); -} - -static void get_flags(void) -{ - u32 max_intel_level, max_amd_level; - u32 tfms; - - if (has_fpu()) - set_bit(X86_FEATURE_FPU, cpu.flags); - - if (has_eflag(X86_EFLAGS_ID)) { - asm("cpuid" - : "=a" (max_intel_level), - "=b" (cpu_vendor[0]), - "=d" (cpu_vendor[1]), - "=c" (cpu_vendor[2]) - : "a" (0)); - - if (max_intel_level >= 0x00000001 && - max_intel_level <= 0x0000ffff) { - asm("cpuid" - : "=a" (tfms), - "=c" (cpu.flags[4]), - "=d" (cpu.flags[0]) - : "a" (0x00000001) - : "ebx"); - cpu.level = (tfms >> 8) & 15; - cpu.model = (tfms >> 4) & 15; - if (cpu.level >= 6) - cpu.model += ((tfms >> 16) & 0xf) << 4; - } - - asm("cpuid" - : "=a" (max_amd_level) - : "a" (0x80000000) - : "ebx", "ecx", "edx"); - - if (max_amd_level >= 0x80000001 && - max_amd_level <= 0x8000ffff) { - u32 eax = 0x80000001; - asm("cpuid" - : "+a" (eax), - "=c" (cpu.flags[6]), - "=d" (cpu.flags[1]) - : : "ebx"); - } - } + return cpu_vendor[0] == A32('G', 'e', 'n', 'u') && + cpu_vendor[1] == A32('i', 'n', 'e', 'I') && + cpu_vendor[2] == A32('n', 't', 'e', 'l'); } /* Returns a bitmask of which words we have error bits in */ -static int check_flags(void) +static int check_cpuflags(void) { u32 err; int i; @@ -187,8 +109,8 @@ int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr) if (has_eflag(X86_EFLAGS_AC)) cpu.level = 4; - get_flags(); - err = check_flags(); + get_cpuflags(); + err = check_cpuflags(); if (test_bit(X86_FEATURE_LM, cpu.flags)) cpu.level = 64; @@ -207,8 +129,8 @@ int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr) eax &= ~(1 << 15); asm("wrmsr" : : "a" (eax), "d" (edx), "c" (ecx)); - get_flags(); /* Make sure it really did something */ - err = check_flags(); + get_cpuflags(); /* Make sure it really did something */ + err = check_cpuflags(); } else if (err == 0x01 && !(err_flags[0] & ~(1 << X86_FEATURE_CX8)) && is_centaur() && cpu.model >= 6) { @@ -223,7 +145,7 @@ int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr) asm("wrmsr" : : "a" (eax), "d" (edx), "c" (ecx)); set_bit(X86_FEATURE_CX8, cpu.flags); - err = check_flags(); + err = check_cpuflags(); } else if (err == 0x01 && is_transmeta()) { /* Transmeta might have masked feature bits in word 0 */ @@ -238,7 +160,20 @@ int check_cpu(int *cpu_level_ptr, int *req_level_ptr, u32 **err_flags_ptr) : : "ecx", "ebx"); asm("wrmsr" : : "a" (eax), "d" (edx), "c" (ecx)); - err = check_flags(); + err = check_cpuflags(); + } else if (err == 0x01 && + !(err_flags[0] & ~(1 << X86_FEATURE_PAE)) && + is_intel() && cpu.level == 6 && + (cpu.model == 9 || cpu.model == 13)) { + /* PAE is disabled on this Pentium M but can be forced */ + if (cmdline_find_option_bool("forcepae")) { + puts("WARNING: Forcing PAE in CPU flags\n"); + set_bit(X86_FEATURE_PAE, cpu.flags); + err = check_cpuflags(); + } + else { + puts("WARNING: PAE disabled. Use parameter 'forcepae' to enable at your own risk!\n"); + } } if (err_flags_ptr) diff --git a/arch/x86/boot/cpuflags.c b/arch/x86/boot/cpuflags.c new file mode 100644 index 000000000000..431fa5f84537 --- /dev/null +++ b/arch/x86/boot/cpuflags.c @@ -0,0 +1,119 @@ +#include <linux/types.h> +#include "bitops.h" + +#include <asm/processor-flags.h> +#include <asm/required-features.h> +#include <asm/msr-index.h> +#include "cpuflags.h" + +struct cpu_features cpu; +u32 cpu_vendor[3]; + +static bool loaded_flags; + +static int has_fpu(void) +{ + u16 fcw = -1, fsw = -1; + unsigned long cr0; + + asm volatile("mov %%cr0,%0" : "=r" (cr0)); + if (cr0 & (X86_CR0_EM|X86_CR0_TS)) { + cr0 &= ~(X86_CR0_EM|X86_CR0_TS); + asm volatile("mov %0,%%cr0" : : "r" (cr0)); + } + + asm volatile("fninit ; fnstsw %0 ; fnstcw %1" + : "+m" (fsw), "+m" (fcw)); + + return fsw == 0 && (fcw & 0x103f) == 0x003f; +} + +/* + * For building the 16-bit code we want to explicitly specify 32-bit + * push/pop operations, rather than just saying 'pushf' or 'popf' and + * letting the compiler choose. But this is also included from the + * compressed/ directory where it may be 64-bit code, and thus needs + * to be 'pushfq' or 'popfq' in that case. + */ +#ifdef __x86_64__ +#define PUSHF "pushfq" +#define POPF "popfq" +#else +#define PUSHF "pushfl" +#define POPF "popfl" +#endif + +int has_eflag(unsigned long mask) +{ + unsigned long f0, f1; + + asm volatile(PUSHF " \n\t" + PUSHF " \n\t" + "pop %0 \n\t" + "mov %0,%1 \n\t" + "xor %2,%1 \n\t" + "push %1 \n\t" + POPF " \n\t" + PUSHF " \n\t" + "pop %1 \n\t" + POPF + : "=&r" (f0), "=&r" (f1) + : "ri" (mask)); + + return !!((f0^f1) & mask); +} + +/* Handle x86_32 PIC using ebx. */ +#if defined(__i386__) && defined(__PIC__) +# define EBX_REG "=r" +#else +# define EBX_REG "=b" +#endif + +static inline void cpuid(u32 id, u32 *a, u32 *b, u32 *c, u32 *d) +{ + asm volatile(".ifnc %%ebx,%3 ; movl %%ebx,%3 ; .endif \n\t" + "cpuid \n\t" + ".ifnc %%ebx,%3 ; xchgl %%ebx,%3 ; .endif \n\t" + : "=a" (*a), "=c" (*c), "=d" (*d), EBX_REG (*b) + : "a" (id) + ); +} + +void get_cpuflags(void) +{ + u32 max_intel_level, max_amd_level; + u32 tfms; + u32 ignored; + + if (loaded_flags) + return; + loaded_flags = true; + + if (has_fpu()) + set_bit(X86_FEATURE_FPU, cpu.flags); + + if (has_eflag(X86_EFLAGS_ID)) { + cpuid(0x0, &max_intel_level, &cpu_vendor[0], &cpu_vendor[2], + &cpu_vendor[1]); + + if (max_intel_level >= 0x00000001 && + max_intel_level <= 0x0000ffff) { + cpuid(0x1, &tfms, &ignored, &cpu.flags[4], + &cpu.flags[0]); + cpu.level = (tfms >> 8) & 15; + cpu.model = (tfms >> 4) & 15; + if (cpu.level >= 6) + cpu.model += ((tfms >> 16) & 0xf) << 4; + } + + cpuid(0x80000000, &max_amd_level, &ignored, &ignored, + &ignored); + + if (max_amd_level >= 0x80000001 && + max_amd_level <= 0x8000ffff) { + cpuid(0x80000001, &ignored, &ignored, &cpu.flags[6], + &cpu.flags[1]); + } + } +} diff --git a/arch/x86/boot/cpuflags.h b/arch/x86/boot/cpuflags.h new file mode 100644 index 000000000000..ea97697e51e4 --- /dev/null +++ b/arch/x86/boot/cpuflags.h @@ -0,0 +1,19 @@ +#ifndef BOOT_CPUFLAGS_H +#define BOOT_CPUFLAGS_H + +#include <asm/cpufeature.h> +#include <asm/processor-flags.h> + +struct cpu_features { + int level; /* Family, or 64 for x86-64 */ + int model; + u32 flags[NCAPINTS]; +}; + +extern struct cpu_features cpu; +extern u32 cpu_vendor[3]; + +int has_eflag(unsigned long mask); +void get_cpuflags(void); + +#endif diff --git a/arch/x86/boot/edd.c b/arch/x86/boot/edd.c index c501a5b466f8..223e42527077 100644 --- a/arch/x86/boot/edd.c +++ b/arch/x86/boot/edd.c @@ -15,6 +15,7 @@ #include "boot.h" #include <linux/edd.h> +#include "string.h" #if defined(CONFIG_EDD) || defined(CONFIG_EDD_MODULE) diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S index 9ec06a1f6d61..84c223479e3c 100644 --- a/arch/x86/boot/header.S +++ b/arch/x86/boot/header.S @@ -283,7 +283,7 @@ _start: # Part 2 of the header, from the old setup.S .ascii "HdrS" # header signature - .word 0x020c # header version number (>= 0x0105) + .word 0x020d # header version number (>= 0x0105) # or else old loadlin-1.5 will fail) .globl realmode_swtch realmode_swtch: .word 0, 0 # default_switch, SETUPSEG @@ -350,7 +350,7 @@ cmd_line_ptr: .long 0 # (Header version 0x0202 or later) # can be located anywhere in # low memory 0x10000 or higher. -ramdisk_max: .long 0x7fffffff +initrd_addr_max: .long 0x7fffffff # (Header version 0x0203 or later) # The highest safe address for # the contents of an initrd @@ -383,15 +383,26 @@ xloadflags: #endif #ifdef CONFIG_EFI_STUB -# ifdef CONFIG_X86_64 -# define XLF23 XLF_EFI_HANDOVER_64 /* 64-bit EFI handover ok */ +# ifdef CONFIG_EFI_MIXED +# define XLF23 (XLF_EFI_HANDOVER_32|XLF_EFI_HANDOVER_64) # else -# define XLF23 XLF_EFI_HANDOVER_32 /* 32-bit EFI handover ok */ +# ifdef CONFIG_X86_64 +# define XLF23 XLF_EFI_HANDOVER_64 /* 64-bit EFI handover ok */ +# else +# define XLF23 XLF_EFI_HANDOVER_32 /* 32-bit EFI handover ok */ +# endif # endif #else # define XLF23 0 #endif - .word XLF0 | XLF1 | XLF23 + +#if defined(CONFIG_X86_64) && defined(CONFIG_EFI) && defined(CONFIG_KEXEC) +# define XLF4 XLF_EFI_KEXEC +#else +# define XLF4 0 +#endif + + .word XLF0 | XLF1 | XLF23 | XLF4 cmdline_size: .long COMMAND_LINE_SIZE-1 #length of the command line, #added with boot protocol @@ -419,13 +430,7 @@ pref_address: .quad LOAD_PHYSICAL_ADDR # preferred load addr #define INIT_SIZE VO_INIT_SIZE #endif init_size: .long INIT_SIZE # kernel initialization size -handover_offset: -#ifdef CONFIG_EFI_STUB - .long 0x30 # offset to the handover - # protocol entry point -#else - .long 0 -#endif +handover_offset: .long 0 # Filled in by build.c # End of setup header ##################################################### diff --git a/arch/x86/boot/main.c b/arch/x86/boot/main.c index cf6083d444f4..fd6c9f236996 100644 --- a/arch/x86/boot/main.c +++ b/arch/x86/boot/main.c @@ -14,6 +14,7 @@ */ #include "boot.h" +#include "string.h" struct boot_params boot_params __attribute__((aligned(16))); diff --git a/arch/x86/boot/regs.c b/arch/x86/boot/regs.c index 958019b1cfa5..c0fb356a3092 100644 --- a/arch/x86/boot/regs.c +++ b/arch/x86/boot/regs.c @@ -17,6 +17,7 @@ */ #include "boot.h" +#include "string.h" void initregs(struct biosregs *reg) { diff --git a/arch/x86/boot/string.c b/arch/x86/boot/string.c index 574dedfe2890..493f3fd9f139 100644 --- a/arch/x86/boot/string.c +++ b/arch/x86/boot/string.c @@ -12,7 +12,16 @@ * Very basic string functions */ -#include "boot.h" +#include <linux/types.h> +#include "ctype.h" + +int memcmp(const void *s1, const void *s2, size_t len) +{ + u8 diff; + asm("repe; cmpsb; setnz %0" + : "=qm" (diff), "+D" (s1), "+S" (s2), "+c" (len)); + return diff; +} int strcmp(const char *str1, const char *str2) { diff --git a/arch/x86/boot/string.h b/arch/x86/boot/string.h new file mode 100644 index 000000000000..725e820602b1 --- /dev/null +++ b/arch/x86/boot/string.h @@ -0,0 +1,21 @@ +#ifndef BOOT_STRING_H +#define BOOT_STRING_H + +/* Undef any of these macros coming from string_32.h. */ +#undef memcpy +#undef memset +#undef memcmp + +void *memcpy(void *dst, const void *src, size_t len); +void *memset(void *dst, int c, size_t len); +int memcmp(const void *s1, const void *s2, size_t len); + +/* + * Access builtin version by default. If one needs to use optimized version, + * do "undef memcpy" in .c file and link against right string.c + */ +#define memcpy(d,s,l) __builtin_memcpy(d,s,l) +#define memset(d,c,l) __builtin_memset(d,c,l) +#define memcmp __builtin_memcmp + +#endif /* BOOT_STRING_H */ diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c index 8e15b22391fc..1a2f2121cada 100644 --- a/arch/x86/boot/tools/build.c +++ b/arch/x86/boot/tools/build.c @@ -53,7 +53,8 @@ int is_big_kernel; #define PECOFF_RELOC_RESERVE 0x20 -unsigned long efi_stub_entry; +unsigned long efi32_stub_entry; +unsigned long efi64_stub_entry; unsigned long efi_pe_entry; unsigned long startup_64; @@ -219,6 +220,52 @@ static void update_pecoff_text(unsigned int text_start, unsigned int file_sz) update_pecoff_section_header(".text", text_start, text_sz); } +static int reserve_pecoff_reloc_section(int c) +{ + /* Reserve 0x20 bytes for .reloc section */ + memset(buf+c, 0, PECOFF_RELOC_RESERVE); + return PECOFF_RELOC_RESERVE; +} + +static void efi_stub_defaults(void) +{ + /* Defaults for old kernel */ +#ifdef CONFIG_X86_32 + efi_pe_entry = 0x10; +#else + efi_pe_entry = 0x210; + startup_64 = 0x200; +#endif +} + +static void efi_stub_entry_update(void) +{ + unsigned long addr = efi32_stub_entry; + +#ifdef CONFIG_X86_64 + /* Yes, this is really how we defined it :( */ + addr = efi64_stub_entry - 0x200; +#endif + +#ifdef CONFIG_EFI_MIXED + if (efi32_stub_entry != addr) + die("32-bit and 64-bit EFI entry points do not match\n"); +#endif + put_unaligned_le32(addr, &buf[0x264]); +} + +#else + +static inline void update_pecoff_setup_and_reloc(unsigned int size) {} +static inline void update_pecoff_text(unsigned int text_start, + unsigned int file_sz) {} +static inline void efi_stub_defaults(void) {} +static inline void efi_stub_entry_update(void) {} + +static inline int reserve_pecoff_reloc_section(int c) +{ + return 0; +} #endif /* CONFIG_EFI_STUB */ @@ -250,7 +297,8 @@ static void parse_zoffset(char *fname) p = (char *)buf; while (p && *p) { - PARSE_ZOFS(p, efi_stub_entry); + PARSE_ZOFS(p, efi32_stub_entry); + PARSE_ZOFS(p, efi64_stub_entry); PARSE_ZOFS(p, efi_pe_entry); PARSE_ZOFS(p, startup_64); @@ -271,15 +319,7 @@ int main(int argc, char ** argv) void *kernel; u32 crc = 0xffffffffUL; - /* Defaults for old kernel */ -#ifdef CONFIG_X86_32 - efi_pe_entry = 0x10; - efi_stub_entry = 0x30; -#else - efi_pe_entry = 0x210; - efi_stub_entry = 0x230; - startup_64 = 0x200; -#endif + efi_stub_defaults(); if (argc != 5) usage(); @@ -302,11 +342,7 @@ int main(int argc, char ** argv) die("Boot block hasn't got boot flag (0xAA55)"); fclose(file); -#ifdef CONFIG_EFI_STUB - /* Reserve 0x20 bytes for .reloc section */ - memset(buf+c, 0, PECOFF_RELOC_RESERVE); - c += PECOFF_RELOC_RESERVE; -#endif + c += reserve_pecoff_reloc_section(c); /* Pad unused space with zeros */ setup_sectors = (c + 511) / 512; @@ -315,9 +351,7 @@ int main(int argc, char ** argv) i = setup_sectors*512; memset(buf+c, 0, i-c); -#ifdef CONFIG_EFI_STUB update_pecoff_setup_and_reloc(i); -#endif /* Set the default root device */ put_unaligned_le16(DEFAULT_ROOT_DEV, &buf[508]); @@ -342,14 +376,9 @@ int main(int argc, char ** argv) buf[0x1f1] = setup_sectors-1; put_unaligned_le32(sys_size, &buf[0x1f4]); -#ifdef CONFIG_EFI_STUB update_pecoff_text(setup_sectors * 512, sz + i + ((sys_size * 16) - sz)); -#ifdef CONFIG_X86_64 /* Yes, this is really how we defined it :( */ - efi_stub_entry -= 0x200; -#endif - put_unaligned_le32(efi_stub_entry, &buf[0x264]); -#endif + efi_stub_entry_update(); crc = partial_crc32(buf, i, crc); if (fwrite(buf, 1, i, dest) != i) diff --git a/arch/x86/boot/video-vesa.c b/arch/x86/boot/video-vesa.c index 11e8c6eb80a1..ba3e100654db 100644 --- a/arch/x86/boot/video-vesa.c +++ b/arch/x86/boot/video-vesa.c @@ -16,6 +16,7 @@ #include "boot.h" #include "video.h" #include "vesa.h" +#include "string.h" /* VESA information */ static struct vesa_general_info vginfo; diff --git a/arch/x86/boot/video.h b/arch/x86/boot/video.h index ff339c5db311..0bb25491262d 100644 --- a/arch/x86/boot/video.h +++ b/arch/x86/boot/video.h @@ -80,7 +80,7 @@ struct card_info { u16 xmode_n; /* Size of unprobed mode range */ }; -#define __videocard struct card_info __attribute__((section(".videocards"))) +#define __videocard struct card_info __attribute__((used,section(".videocards"))) extern struct card_info video_cards[], video_cards_end[]; int mode_defined(u16 mode); /* video.c */ |