diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/boot/Makefile | 2 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/Makefile | 4 | ||||
| -rw-r--r-- | arch/x86/boot/compressed/kernel_info.S | 17 | ||||
| -rw-r--r-- | arch/x86/boot/header.S | 1 | ||||
| -rw-r--r-- | arch/x86/boot/tools/build.c | 5 | ||||
| -rw-r--r-- | arch/x86/include/uapi/asm/bootparam.h | 1 |
6 files changed, 27 insertions, 3 deletions
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile index e2839b5c246c..c30a9b642a86 100644 --- a/arch/x86/boot/Makefile +++ b/arch/x86/boot/Makefile @@ -87,7 +87,7 @@ $(obj)/vmlinux.bin: $(obj)/compressed/vmlinux FORCE SETUP_OBJS = $(addprefix $(obj)/,$(setup-y)) -sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|input_data\|_end\|_ehead\|_text\|z_.*\)$$/\#define ZO_\2 0x\1/p' +sed-zoffset := -e 's/^\([0-9a-fA-F]*\) [ABCDGRSTVW] \(startup_32\|startup_64\|efi32_stub_entry\|efi64_stub_entry\|efi_pe_entry\|input_data\|kernel_info\|_end\|_ehead\|_text\|z_.*\)$$/\#define ZO_\2 0x\1/p' quiet_cmd_zoffset = ZOFFSET $@ cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@ diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile index 6b84afdd7538..fad3b18e2cc3 100644 --- a/arch/x86/boot/compressed/Makefile +++ b/arch/x86/boot/compressed/Makefile @@ -72,8 +72,8 @@ $(obj)/../voffset.h: vmlinux FORCE $(obj)/misc.o: $(obj)/../voffset.h -vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o \ - $(obj)/string.o $(obj)/cmdline.o $(obj)/error.o \ +vmlinux-objs-y := $(obj)/vmlinux.lds $(obj)/kernel_info.o $(obj)/head_$(BITS).o \ + $(obj)/misc.o $(obj)/string.o $(obj)/cmdline.o $(obj)/error.o \ $(obj)/piggy.o $(obj)/cpuflags.o vmlinux-objs-$(CONFIG_EARLY_PRINTK) += $(obj)/early_serial_console.o diff --git a/arch/x86/boot/compressed/kernel_info.S b/arch/x86/boot/compressed/kernel_info.S new file mode 100644 index 000000000000..8ea6f6e3feef --- /dev/null +++ b/arch/x86/boot/compressed/kernel_info.S @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + + .section ".rodata.kernel_info", "a" + + .global kernel_info + +kernel_info: + /* Header, Linux top (structure). */ + .ascii "LToP" + /* Size. */ + .long kernel_info_var_len_data - kernel_info + /* Size total. */ + .long kernel_info_end - kernel_info + +kernel_info_var_len_data: + /* Empty for time being... */ +kernel_info_end: diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S index 2c11c0f45d49..22dcecaaa898 100644 --- a/arch/x86/boot/header.S +++ b/arch/x86/boot/header.S @@ -567,6 +567,7 @@ pref_address: .quad LOAD_PHYSICAL_ADDR # preferred load addr init_size: .long INIT_SIZE # kernel initialization size handover_offset: .long 0 # Filled in by build.c +kernel_info_offset: .long 0 # Filled in by build.c # End of setup header ##################################################### diff --git a/arch/x86/boot/tools/build.c b/arch/x86/boot/tools/build.c index a93d44e58f9c..55e669d29e54 100644 --- a/arch/x86/boot/tools/build.c +++ b/arch/x86/boot/tools/build.c @@ -56,6 +56,7 @@ u8 buf[SETUP_SECT_MAX*512]; unsigned long efi32_stub_entry; unsigned long efi64_stub_entry; unsigned long efi_pe_entry; +unsigned long kernel_info; unsigned long startup_64; /*----------------------------------------------------------------------*/ @@ -321,6 +322,7 @@ static void parse_zoffset(char *fname) PARSE_ZOFS(p, efi32_stub_entry); PARSE_ZOFS(p, efi64_stub_entry); PARSE_ZOFS(p, efi_pe_entry); + PARSE_ZOFS(p, kernel_info); PARSE_ZOFS(p, startup_64); p = strchr(p, '\n'); @@ -410,6 +412,9 @@ int main(int argc, char ** argv) efi_stub_entry_update(); + /* Update kernel_info offset. */ + put_unaligned_le32(kernel_info, &buf[0x268]); + crc = partial_crc32(buf, i, crc); if (fwrite(buf, 1, i, dest) != i) die("Writing setup failed"); diff --git a/arch/x86/include/uapi/asm/bootparam.h b/arch/x86/include/uapi/asm/bootparam.h index c895df5482c5..a1ebcd7a991c 100644 --- a/arch/x86/include/uapi/asm/bootparam.h +++ b/arch/x86/include/uapi/asm/bootparam.h @@ -88,6 +88,7 @@ struct setup_header { __u64 pref_address; __u32 init_size; __u32 handover_offset; + __u32 kernel_info_offset; } __attribute__((packed)); struct sys_desc_table { |