[v2,02/14] crash: split vmcoreinfo exporting code out from crash_core.c
Commit Message
Now move the relevant codes into separate files:
kernel/crash_reserve.c, include/linux/crash_reserve.h.
And add config item CRASH_RESERVE to control its enabling.
And also update the old ifdeffery of CONFIG_CRASH_CORE, including of
<linux/crash_core.h> and config item dependency on CRASH_CORE
accordingly.
And also do renaming as follows:
- arch/xxx/kernel/{crash_core.c => vmcore_info.c}
because they are only related to vmcoreinfo exporting on x86, arm64,
riscv.
And also Remove config item CRASH_CORE, and rely on CONFIG_KEXEC_CORE to
decide if build in crash_core.c.
Signed-off-by: Baoquan He <bhe@redhat.com>
---
arch/arm64/kernel/Makefile | 2 +-
.../kernel/{crash_core.c => vmcore_info.c} | 2 +-
arch/powerpc/Kconfig | 2 +-
arch/powerpc/kernel/setup-common.c | 2 +-
arch/powerpc/platforms/powernv/opal-core.c | 2 +-
arch/riscv/kernel/Makefile | 2 +-
.../kernel/{crash_core.c => vmcore_info.c} | 2 +-
arch/x86/kernel/Makefile | 2 +-
.../{crash_core_32.c => vmcore_info_32.c} | 2 +-
.../{crash_core_64.c => vmcore_info_64.c} | 2 +-
drivers/firmware/qemu_fw_cfg.c | 14 +-
fs/proc/Kconfig | 2 +-
fs/proc/kcore.c | 2 +-
include/linux/buildid.h | 2 +-
include/linux/crash_core.h | 73 ------
include/linux/kexec.h | 1 +
include/linux/vmcore_info.h | 81 ++++++
kernel/Kconfig.kexec | 4 +-
kernel/Makefile | 4 +-
kernel/crash_core.c | 208 ----------------
kernel/ksysfs.c | 6 +-
kernel/printk/printk.c | 4 +-
kernel/vmcore_info.c | 233 ++++++++++++++++++
lib/buildid.c | 2 +-
24 files changed, 345 insertions(+), 311 deletions(-)
rename arch/arm64/kernel/{crash_core.c => vmcore_info.c} (97%)
rename arch/riscv/kernel/{crash_core.c => vmcore_info.c} (96%)
rename arch/x86/kernel/{crash_core_32.c => vmcore_info_32.c} (90%)
rename arch/x86/kernel/{crash_core_64.c => vmcore_info_64.c} (94%)
create mode 100644 include/linux/vmcore_info.h
create mode 100644 kernel/vmcore_info.c
Comments
Hello Baoquan,
On 19/01/24 20:22, Baoquan He wrote:
> Now move the relevant codes into separate files:
> kernel/crash_reserve.c, include/linux/crash_reserve.h.
>
> And add config item CRASH_RESERVE to control its enabling.
Feels like this patch is more about vmcore_info.[c|h] and CONFIG_VMCORE_INFO
then the above mentioned files and config.
- Sourabh
>
> And also update the old ifdeffery of CONFIG_CRASH_CORE, including of
> <linux/crash_core.h> and config item dependency on CRASH_CORE
> accordingly.
>
> And also do renaming as follows:
> - arch/xxx/kernel/{crash_core.c => vmcore_info.c}
> because they are only related to vmcoreinfo exporting on x86, arm64,
> riscv.
>
> And also Remove config item CRASH_CORE, and rely on CONFIG_KEXEC_CORE to
> decide if build in crash_core.c.
>
> Signed-off-by: Baoquan He <bhe@redhat.com>
> ---
> arch/arm64/kernel/Makefile | 2 +-
> .../kernel/{crash_core.c => vmcore_info.c} | 2 +-
> arch/powerpc/Kconfig | 2 +-
> arch/powerpc/kernel/setup-common.c | 2 +-
> arch/powerpc/platforms/powernv/opal-core.c | 2 +-
> arch/riscv/kernel/Makefile | 2 +-
> .../kernel/{crash_core.c => vmcore_info.c} | 2 +-
> arch/x86/kernel/Makefile | 2 +-
> .../{crash_core_32.c => vmcore_info_32.c} | 2 +-
> .../{crash_core_64.c => vmcore_info_64.c} | 2 +-
> drivers/firmware/qemu_fw_cfg.c | 14 +-
> fs/proc/Kconfig | 2 +-
> fs/proc/kcore.c | 2 +-
> include/linux/buildid.h | 2 +-
> include/linux/crash_core.h | 73 ------
> include/linux/kexec.h | 1 +
> include/linux/vmcore_info.h | 81 ++++++
> kernel/Kconfig.kexec | 4 +-
> kernel/Makefile | 4 +-
> kernel/crash_core.c | 208 ----------------
> kernel/ksysfs.c | 6 +-
> kernel/printk/printk.c | 4 +-
> kernel/vmcore_info.c | 233 ++++++++++++++++++
> lib/buildid.c | 2 +-
> 24 files changed, 345 insertions(+), 311 deletions(-)
> rename arch/arm64/kernel/{crash_core.c => vmcore_info.c} (97%)
> rename arch/riscv/kernel/{crash_core.c => vmcore_info.c} (96%)
> rename arch/x86/kernel/{crash_core_32.c => vmcore_info_32.c} (90%)
> rename arch/x86/kernel/{crash_core_64.c => vmcore_info_64.c} (94%)
> create mode 100644 include/linux/vmcore_info.h
> create mode 100644 kernel/vmcore_info.c
>
> diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
> index d95b3d6b471a..bcf89587a549 100644
> --- a/arch/arm64/kernel/Makefile
> +++ b/arch/arm64/kernel/Makefile
> @@ -66,7 +66,7 @@ obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file.o kexec_image.o
> obj-$(CONFIG_ARM64_RELOC_TEST) += arm64-reloc-test.o
> arm64-reloc-test-y := reloc_test_core.o reloc_test_syms.o
> obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
> -obj-$(CONFIG_CRASH_CORE) += crash_core.o
> +obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o
> obj-$(CONFIG_ARM_SDE_INTERFACE) += sdei.o
> obj-$(CONFIG_ARM64_PTR_AUTH) += pointer_auth.o
> obj-$(CONFIG_ARM64_MTE) += mte.o
> diff --git a/arch/arm64/kernel/crash_core.c b/arch/arm64/kernel/vmcore_info.c
> similarity index 97%
> rename from arch/arm64/kernel/crash_core.c
> rename to arch/arm64/kernel/vmcore_info.c
> index 66cde752cd74..a5abf7186922 100644
> --- a/arch/arm64/kernel/crash_core.c
> +++ b/arch/arm64/kernel/vmcore_info.c
> @@ -4,7 +4,7 @@
> * Copyright (C) Huawei Futurewei Technologies.
> */
>
> -#include <linux/crash_core.h>
> +#include <linux/vmcore_info.h>
> #include <asm/cpufeature.h>
> #include <asm/memory.h>
> #include <asm/pgtable-hwdef.h>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index 6aeab95f0edd..1520146d7c2c 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -690,7 +690,7 @@ config ARCH_SELECTS_CRASH_DUMP
> config FA_DUMP
> bool "Firmware-assisted dump"
> depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
> - select CRASH_CORE
> + select VMCORE_INFO
> select CRASH_RESERVE
> select CRASH_DUMP
> help
> diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
> index 9b142b9d5187..733f210ffda1 100644
> --- a/arch/powerpc/kernel/setup-common.c
> +++ b/arch/powerpc/kernel/setup-common.c
> @@ -109,7 +109,7 @@ int ppc_do_canonicalize_irqs;
> EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
> #endif
>
> -#ifdef CONFIG_CRASH_CORE
> +#ifdef CONFIG_VMCORE_INFO
> /* This keeps a track of which one is the crashing cpu. */
> int crashing_cpu = -1;
> #endif
> diff --git a/arch/powerpc/platforms/powernv/opal-core.c b/arch/powerpc/platforms/powernv/opal-core.c
> index bb7657115f1d..c9a9b759cc92 100644
> --- a/arch/powerpc/platforms/powernv/opal-core.c
> +++ b/arch/powerpc/platforms/powernv/opal-core.c
> @@ -16,7 +16,7 @@
> #include <linux/kobject.h>
> #include <linux/sysfs.h>
> #include <linux/slab.h>
> -#include <linux/crash_core.h>
> +#include <linux/vmcore_info.h>
> #include <linux/of.h>
>
> #include <asm/page.h>
> diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
> index c92c623b311e..63a36539ea1a 100644
> --- a/arch/riscv/kernel/Makefile
> +++ b/arch/riscv/kernel/Makefile
> @@ -91,7 +91,7 @@ obj-$(CONFIG_KGDB) += kgdb.o
> obj-$(CONFIG_KEXEC_CORE) += kexec_relocate.o crash_save_regs.o machine_kexec.o
> obj-$(CONFIG_KEXEC_FILE) += elf_kexec.o machine_kexec_file.o
> obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
> -obj-$(CONFIG_CRASH_CORE) += crash_core.o
> +obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o
>
> obj-$(CONFIG_JUMP_LABEL) += jump_label.o
>
> diff --git a/arch/riscv/kernel/crash_core.c b/arch/riscv/kernel/vmcore_info.c
> similarity index 96%
> rename from arch/riscv/kernel/crash_core.c
> rename to arch/riscv/kernel/vmcore_info.c
> index 8706736fd4e2..e8ad57a60a2f 100644
> --- a/arch/riscv/kernel/crash_core.c
> +++ b/arch/riscv/kernel/vmcore_info.c
> @@ -1,6 +1,6 @@
> // SPDX-License-Identifier: GPL-2.0-only
>
> -#include <linux/crash_core.h>
> +#include <linux/vmcore_info.h>
> #include <linux/pagemap.h>
>
> void arch_crash_save_vmcoreinfo(void)
> diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
> index 0000325ab98f..913d4022131e 100644
> --- a/arch/x86/kernel/Makefile
> +++ b/arch/x86/kernel/Makefile
> @@ -98,7 +98,7 @@ obj-$(CONFIG_FTRACE_SYSCALLS) += ftrace.o
> obj-$(CONFIG_X86_TSC) += trace_clock.o
> obj-$(CONFIG_TRACING) += trace.o
> obj-$(CONFIG_RETHOOK) += rethook.o
> -obj-$(CONFIG_CRASH_CORE) += crash_core_$(BITS).o
> +obj-$(CONFIG_VMCORE_INFO) += vmcore_info_$(BITS).o
> obj-$(CONFIG_KEXEC_CORE) += machine_kexec_$(BITS).o
> obj-$(CONFIG_KEXEC_CORE) += relocate_kernel_$(BITS).o crash.o
> obj-$(CONFIG_KEXEC_FILE) += kexec-bzimage64.o
> diff --git a/arch/x86/kernel/crash_core_32.c b/arch/x86/kernel/vmcore_info_32.c
> similarity index 90%
> rename from arch/x86/kernel/crash_core_32.c
> rename to arch/x86/kernel/vmcore_info_32.c
> index 8a89c109e20a..5995a749288a 100644
> --- a/arch/x86/kernel/crash_core_32.c
> +++ b/arch/x86/kernel/vmcore_info_32.c
> @@ -1,6 +1,6 @@
> // SPDX-License-Identifier: GPL-2.0-only
>
> -#include <linux/crash_core.h>
> +#include <linux/vmcore_info.h>
> #include <linux/pgtable.h>
>
> #include <asm/setup.h>
> diff --git a/arch/x86/kernel/crash_core_64.c b/arch/x86/kernel/vmcore_info_64.c
> similarity index 94%
> rename from arch/x86/kernel/crash_core_64.c
> rename to arch/x86/kernel/vmcore_info_64.c
> index 7d255f882afe..0dec7d868754 100644
> --- a/arch/x86/kernel/crash_core_64.c
> +++ b/arch/x86/kernel/vmcore_info_64.c
> @@ -1,6 +1,6 @@
> // SPDX-License-Identifier: GPL-2.0-only
>
> -#include <linux/crash_core.h>
> +#include <linux/vmcore_info.h>
> #include <linux/pgtable.h>
>
> #include <asm/setup.h>
> diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c
> index 03da9a4354f8..5f43dfa22f79 100644
> --- a/drivers/firmware/qemu_fw_cfg.c
> +++ b/drivers/firmware/qemu_fw_cfg.c
> @@ -37,7 +37,7 @@
> #include <uapi/linux/qemu_fw_cfg.h>
> #include <linux/delay.h>
> #include <linux/crash_dump.h>
> -#include <linux/crash_core.h>
> +#include <linux/vmcore_info.h>
>
> MODULE_AUTHOR("Gabriel L. Somlo <somlo@cmu.edu>");
> MODULE_DESCRIPTION("QEMU fw_cfg sysfs support");
> @@ -67,7 +67,7 @@ static void fw_cfg_sel_endianness(u16 key)
> iowrite16(key, fw_cfg_reg_ctrl);
> }
>
> -#ifdef CONFIG_CRASH_CORE
> +#ifdef CONFIG_VMCORE_INFO
> static inline bool fw_cfg_dma_enabled(void)
> {
> return (fw_cfg_rev & FW_CFG_VERSION_DMA) && fw_cfg_reg_dma;
> @@ -156,7 +156,7 @@ static ssize_t fw_cfg_read_blob(u16 key,
> return count;
> }
>
> -#ifdef CONFIG_CRASH_CORE
> +#ifdef CONFIG_VMCORE_INFO
> /* write chunk of given fw_cfg blob (caller responsible for sanity-check) */
> static ssize_t fw_cfg_write_blob(u16 key,
> void *buf, loff_t pos, size_t count)
> @@ -195,7 +195,7 @@ static ssize_t fw_cfg_write_blob(u16 key,
>
> return ret;
> }
> -#endif /* CONFIG_CRASH_CORE */
> +#endif /* CONFIG_VMCORE_INFO */
>
> /* clean up fw_cfg device i/o */
> static void fw_cfg_io_cleanup(void)
> @@ -319,7 +319,7 @@ struct fw_cfg_sysfs_entry {
> struct list_head list;
> };
>
> -#ifdef CONFIG_CRASH_CORE
> +#ifdef CONFIG_VMCORE_INFO
> static ssize_t fw_cfg_write_vmcoreinfo(const struct fw_cfg_file *f)
> {
> static struct fw_cfg_vmcoreinfo *data;
> @@ -343,7 +343,7 @@ static ssize_t fw_cfg_write_vmcoreinfo(const struct fw_cfg_file *f)
> kfree(data);
> return ret;
> }
> -#endif /* CONFIG_CRASH_CORE */
> +#endif /* CONFIG_VMCORE_INFO */
>
> /* get fw_cfg_sysfs_entry from kobject member */
> static inline struct fw_cfg_sysfs_entry *to_entry(struct kobject *kobj)
> @@ -583,7 +583,7 @@ static int fw_cfg_register_file(const struct fw_cfg_file *f)
> int err;
> struct fw_cfg_sysfs_entry *entry;
>
> -#ifdef CONFIG_CRASH_CORE
> +#ifdef CONFIG_VMCORE_INFO
> if (fw_cfg_dma_enabled() &&
> strcmp(f->name, FW_CFG_VMCOREINFO_FILENAME) == 0 &&
> !is_kdump_kernel()) {
> diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
> index 32b1116ae137..d80a1431ef7b 100644
> --- a/fs/proc/Kconfig
> +++ b/fs/proc/Kconfig
> @@ -32,7 +32,7 @@ config PROC_FS
> config PROC_KCORE
> bool "/proc/kcore support" if !ARM
> depends on PROC_FS && MMU
> - select CRASH_CORE
> + select VMCORE_INFO
> help
> Provides a virtual ELF core file of the live kernel. This can
> be read with gdb and other ELF tools. No modifications can be
> diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
> index 6422e569b080..8e08a9a1b7ed 100644
> --- a/fs/proc/kcore.c
> +++ b/fs/proc/kcore.c
> @@ -10,7 +10,7 @@
> * Safe accesses to vmalloc/direct-mapped discontiguous areas, Kanoj Sarcar <kanoj@sgi.com>
> */
>
> -#include <linux/crash_core.h>
> +#include <linux/vmcore_info.h>
> #include <linux/mm.h>
> #include <linux/proc_fs.h>
> #include <linux/kcore.h>
> diff --git a/include/linux/buildid.h b/include/linux/buildid.h
> index 8a582d242f06..20aa3c2d89f7 100644
> --- a/include/linux/buildid.h
> +++ b/include/linux/buildid.h
> @@ -11,7 +11,7 @@ int build_id_parse(struct vm_area_struct *vma, unsigned char *build_id,
> __u32 *size);
> int build_id_parse_buf(const void *buf, unsigned char *build_id, u32 buf_size);
>
> -#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_CRASH_CORE)
> +#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_VMCORE_INFO)
> extern unsigned char vmlinux_build_id[BUILD_ID_SIZE_MAX];
> void init_vmlinux_build_id(void);
> #else
> diff --git a/include/linux/crash_core.h b/include/linux/crash_core.h
> index 1fde49246fa6..7f19f62018ef 100644
> --- a/include/linux/crash_core.h
> +++ b/include/linux/crash_core.h
> @@ -6,79 +6,6 @@
> #include <linux/elfcore.h>
> #include <linux/elf.h>
>
> -#define CRASH_CORE_NOTE_NAME "CORE"
> -#define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
> -#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)
> -#define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
> -
> -/*
> - * The per-cpu notes area is a list of notes terminated by a "NULL"
> - * note header. For kdump, the code in vmcore.c runs in the context
> - * of the second kernel to combine them into one note.
> - */
> -#define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
> - CRASH_CORE_NOTE_NAME_BYTES + \
> - CRASH_CORE_NOTE_DESC_BYTES)
> -
> -#define VMCOREINFO_BYTES PAGE_SIZE
> -#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
> -#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
> -#define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
> - VMCOREINFO_NOTE_NAME_BYTES + \
> - VMCOREINFO_BYTES)
> -
> -typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
> -/* Per cpu memory for storing cpu states in case of system crash. */
> -extern note_buf_t __percpu *crash_notes;
> -
> -void crash_update_vmcoreinfo_safecopy(void *ptr);
> -void crash_save_vmcoreinfo(void);
> -void arch_crash_save_vmcoreinfo(void);
> -__printf(1, 2)
> -void vmcoreinfo_append_str(const char *fmt, ...);
> -phys_addr_t paddr_vmcoreinfo_note(void);
> -
> -#define VMCOREINFO_OSRELEASE(value) \
> - vmcoreinfo_append_str("OSRELEASE=%s\n", value)
> -#define VMCOREINFO_BUILD_ID() \
> - ({ \
> - static_assert(sizeof(vmlinux_build_id) == 20); \
> - vmcoreinfo_append_str("BUILD-ID=%20phN\n", vmlinux_build_id); \
> - })
> -
> -#define VMCOREINFO_PAGESIZE(value) \
> - vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
> -#define VMCOREINFO_SYMBOL(name) \
> - vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
> -#define VMCOREINFO_SYMBOL_ARRAY(name) \
> - vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name)
> -#define VMCOREINFO_SIZE(name) \
> - vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
> - (unsigned long)sizeof(name))
> -#define VMCOREINFO_STRUCT_SIZE(name) \
> - vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
> - (unsigned long)sizeof(struct name))
> -#define VMCOREINFO_OFFSET(name, field) \
> - vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
> - (unsigned long)offsetof(struct name, field))
> -#define VMCOREINFO_TYPE_OFFSET(name, field) \
> - vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
> - (unsigned long)offsetof(name, field))
> -#define VMCOREINFO_LENGTH(name, value) \
> - vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
> -#define VMCOREINFO_NUMBER(name) \
> - vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
> -#define VMCOREINFO_CONFIG(name) \
> - vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
> -
> -extern unsigned char *vmcoreinfo_data;
> -extern size_t vmcoreinfo_size;
> -extern u32 *vmcoreinfo_note;
> -
> -Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
> - void *data, size_t data_len);
> -void final_note(Elf_Word *buf);
> -
> /* Alignment required for elf header segment */
> #define ELF_CORE_HEADER_ALIGN 4096
>
> diff --git a/include/linux/kexec.h b/include/linux/kexec.h
> index 6d79bfb52e5b..9c7bb8b56ed6 100644
> --- a/include/linux/kexec.h
> +++ b/include/linux/kexec.h
> @@ -16,6 +16,7 @@
> #if !defined(__ASSEMBLY__)
>
> #include <linux/crash_core.h>
> +#include <linux/vmcore_info.h>
> #include <linux/crash_reserve.h>
> #include <asm/io.h>
> #include <linux/range.h>
> diff --git a/include/linux/vmcore_info.h b/include/linux/vmcore_info.h
> new file mode 100644
> index 000000000000..e1dec1a6a749
> --- /dev/null
> +++ b/include/linux/vmcore_info.h
> @@ -0,0 +1,81 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef LINUX_VMCORE_INFO_H
> +#define LINUX_VMCORE_INFO_H
> +
> +#include <linux/linkage.h>
> +#include <linux/elfcore.h>
> +#include <linux/elf.h>
> +
> +#define CRASH_CORE_NOTE_NAME "CORE"
> +#define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
> +#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)
> +#define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
> +
> +/*
> + * The per-cpu notes area is a list of notes terminated by a "NULL"
> + * note header. For kdump, the code in vmcore.c runs in the context
> + * of the second kernel to combine them into one note.
> + */
> +#define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
> + CRASH_CORE_NOTE_NAME_BYTES + \
> + CRASH_CORE_NOTE_DESC_BYTES)
> +
> +#define VMCOREINFO_BYTES PAGE_SIZE
> +#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
> +#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
> +#define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
> + VMCOREINFO_NOTE_NAME_BYTES + \
> + VMCOREINFO_BYTES)
> +
> +typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
> +/* Per cpu memory for storing cpu states in case of system crash. */
> +extern note_buf_t __percpu *crash_notes;
> +
> +void crash_update_vmcoreinfo_safecopy(void *ptr);
> +void crash_save_vmcoreinfo(void);
> +void arch_crash_save_vmcoreinfo(void);
> +__printf(1, 2)
> +void vmcoreinfo_append_str(const char *fmt, ...);
> +phys_addr_t paddr_vmcoreinfo_note(void);
> +
> +#define VMCOREINFO_OSRELEASE(value) \
> + vmcoreinfo_append_str("OSRELEASE=%s\n", value)
> +#define VMCOREINFO_BUILD_ID() \
> + ({ \
> + static_assert(sizeof(vmlinux_build_id) == 20); \
> + vmcoreinfo_append_str("BUILD-ID=%20phN\n", vmlinux_build_id); \
> + })
> +
> +#define VMCOREINFO_PAGESIZE(value) \
> + vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
> +#define VMCOREINFO_SYMBOL(name) \
> + vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
> +#define VMCOREINFO_SYMBOL_ARRAY(name) \
> + vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name)
> +#define VMCOREINFO_SIZE(name) \
> + vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
> + (unsigned long)sizeof(name))
> +#define VMCOREINFO_STRUCT_SIZE(name) \
> + vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
> + (unsigned long)sizeof(struct name))
> +#define VMCOREINFO_OFFSET(name, field) \
> + vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
> + (unsigned long)offsetof(struct name, field))
> +#define VMCOREINFO_TYPE_OFFSET(name, field) \
> + vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
> + (unsigned long)offsetof(name, field))
> +#define VMCOREINFO_LENGTH(name, value) \
> + vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
> +#define VMCOREINFO_NUMBER(name) \
> + vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
> +#define VMCOREINFO_CONFIG(name) \
> + vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
> +
> +extern unsigned char *vmcoreinfo_data;
> +extern size_t vmcoreinfo_size;
> +extern u32 *vmcoreinfo_note;
> +
> +Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
> + void *data, size_t data_len);
> +void final_note(Elf_Word *buf);
> +#endif /* LINUX_VMCORE_INFO_H */
> diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec
> index 8b7be71edd85..8faf27043432 100644
> --- a/kernel/Kconfig.kexec
> +++ b/kernel/Kconfig.kexec
> @@ -5,11 +5,11 @@ menu "Kexec and crash features"
> config CRASH_RESERVE
> bool
>
> -config CRASH_CORE
> +config VMCORE_INFO
> bool
>
> config KEXEC_CORE
> - select CRASH_CORE
> + select VMCORE_INFO
> select CRASH_RESERVE
> bool
>
> diff --git a/kernel/Makefile b/kernel/Makefile
> index 05fa88b3ab74..649272a1d6b9 100644
> --- a/kernel/Makefile
> +++ b/kernel/Makefile
> @@ -68,9 +68,9 @@ obj-$(CONFIG_MODULE_SIG_FORMAT) += module_signature.o
> obj-$(CONFIG_KALLSYMS) += kallsyms.o
> obj-$(CONFIG_KALLSYMS_SELFTEST) += kallsyms_selftest.o
> obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
> -obj-$(CONFIG_CRASH_CORE) += crash_core.o
> +obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o
> obj-$(CONFIG_CRASH_RESERVE) += crash_reserve.o
> -obj-$(CONFIG_KEXEC_CORE) += kexec_core.o
> +obj-$(CONFIG_KEXEC_CORE) += kexec_core.o crash_core.o
> obj-$(CONFIG_KEXEC) += kexec.o
> obj-$(CONFIG_KEXEC_FILE) += kexec_file.o
> obj-$(CONFIG_KEXEC_ELF) += kexec_elf.o
> diff --git a/kernel/crash_core.c b/kernel/crash_core.c
> index 055859c62f19..2f4df1fe6f7a 100644
> --- a/kernel/crash_core.c
> +++ b/kernel/crash_core.c
> @@ -26,14 +26,6 @@
> /* Per cpu memory for storing cpu states in case of system crash. */
> note_buf_t __percpu *crash_notes;
>
> -/* vmcoreinfo stuff */
> -unsigned char *vmcoreinfo_data;
> -size_t vmcoreinfo_size;
> -u32 *vmcoreinfo_note;
> -
> -/* trusted vmcoreinfo, e.g. we can make a copy in the crash memory */
> -static unsigned char *vmcoreinfo_data_safecopy;
> -
> int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map,
> void **addr, unsigned long *sz)
> {
> @@ -195,206 +187,6 @@ int crash_exclude_mem_range(struct crash_mem *mem,
> return 0;
> }
>
> -Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
> - void *data, size_t data_len)
> -{
> - struct elf_note *note = (struct elf_note *)buf;
> -
> - note->n_namesz = strlen(name) + 1;
> - note->n_descsz = data_len;
> - note->n_type = type;
> - buf += DIV_ROUND_UP(sizeof(*note), sizeof(Elf_Word));
> - memcpy(buf, name, note->n_namesz);
> - buf += DIV_ROUND_UP(note->n_namesz, sizeof(Elf_Word));
> - memcpy(buf, data, data_len);
> - buf += DIV_ROUND_UP(data_len, sizeof(Elf_Word));
> -
> - return buf;
> -}
> -
> -void final_note(Elf_Word *buf)
> -{
> - memset(buf, 0, sizeof(struct elf_note));
> -}
> -
> -static void update_vmcoreinfo_note(void)
> -{
> - u32 *buf = vmcoreinfo_note;
> -
> - if (!vmcoreinfo_size)
> - return;
> - buf = append_elf_note(buf, VMCOREINFO_NOTE_NAME, 0, vmcoreinfo_data,
> - vmcoreinfo_size);
> - final_note(buf);
> -}
> -
> -void crash_update_vmcoreinfo_safecopy(void *ptr)
> -{
> - if (ptr)
> - memcpy(ptr, vmcoreinfo_data, vmcoreinfo_size);
> -
> - vmcoreinfo_data_safecopy = ptr;
> -}
> -
> -void crash_save_vmcoreinfo(void)
> -{
> - if (!vmcoreinfo_note)
> - return;
> -
> - /* Use the safe copy to generate vmcoreinfo note if have */
> - if (vmcoreinfo_data_safecopy)
> - vmcoreinfo_data = vmcoreinfo_data_safecopy;
> -
> - vmcoreinfo_append_str("CRASHTIME=%lld\n", ktime_get_real_seconds());
> - update_vmcoreinfo_note();
> -}
> -
> -void vmcoreinfo_append_str(const char *fmt, ...)
> -{
> - va_list args;
> - char buf[0x50];
> - size_t r;
> -
> - va_start(args, fmt);
> - r = vscnprintf(buf, sizeof(buf), fmt, args);
> - va_end(args);
> -
> - r = min(r, (size_t)VMCOREINFO_BYTES - vmcoreinfo_size);
> -
> - memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r);
> -
> - vmcoreinfo_size += r;
> -
> - WARN_ONCE(vmcoreinfo_size == VMCOREINFO_BYTES,
> - "vmcoreinfo data exceeds allocated size, truncating");
> -}
> -
> -/*
> - * provide an empty default implementation here -- architecture
> - * code may override this
> - */
> -void __weak arch_crash_save_vmcoreinfo(void)
> -{}
> -
> -phys_addr_t __weak paddr_vmcoreinfo_note(void)
> -{
> - return __pa(vmcoreinfo_note);
> -}
> -EXPORT_SYMBOL(paddr_vmcoreinfo_note);
> -
> -static int __init crash_save_vmcoreinfo_init(void)
> -{
> - vmcoreinfo_data = (unsigned char *)get_zeroed_page(GFP_KERNEL);
> - if (!vmcoreinfo_data) {
> - pr_warn("Memory allocation for vmcoreinfo_data failed\n");
> - return -ENOMEM;
> - }
> -
> - vmcoreinfo_note = alloc_pages_exact(VMCOREINFO_NOTE_SIZE,
> - GFP_KERNEL | __GFP_ZERO);
> - if (!vmcoreinfo_note) {
> - free_page((unsigned long)vmcoreinfo_data);
> - vmcoreinfo_data = NULL;
> - pr_warn("Memory allocation for vmcoreinfo_note failed\n");
> - return -ENOMEM;
> - }
> -
> - VMCOREINFO_OSRELEASE(init_uts_ns.name.release);
> - VMCOREINFO_BUILD_ID();
> - VMCOREINFO_PAGESIZE(PAGE_SIZE);
> -
> - VMCOREINFO_SYMBOL(init_uts_ns);
> - VMCOREINFO_OFFSET(uts_namespace, name);
> - VMCOREINFO_SYMBOL(node_online_map);
> -#ifdef CONFIG_MMU
> - VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir);
> -#endif
> - VMCOREINFO_SYMBOL(_stext);
> - VMCOREINFO_SYMBOL(vmap_area_list);
> -
> -#ifndef CONFIG_NUMA
> - VMCOREINFO_SYMBOL(mem_map);
> - VMCOREINFO_SYMBOL(contig_page_data);
> -#endif
> -#ifdef CONFIG_SPARSEMEM
> - VMCOREINFO_SYMBOL_ARRAY(mem_section);
> - VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS);
> - VMCOREINFO_STRUCT_SIZE(mem_section);
> - VMCOREINFO_OFFSET(mem_section, section_mem_map);
> - VMCOREINFO_NUMBER(SECTION_SIZE_BITS);
> - VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS);
> -#endif
> - VMCOREINFO_STRUCT_SIZE(page);
> - VMCOREINFO_STRUCT_SIZE(pglist_data);
> - VMCOREINFO_STRUCT_SIZE(zone);
> - VMCOREINFO_STRUCT_SIZE(free_area);
> - VMCOREINFO_STRUCT_SIZE(list_head);
> - VMCOREINFO_SIZE(nodemask_t);
> - VMCOREINFO_OFFSET(page, flags);
> - VMCOREINFO_OFFSET(page, _refcount);
> - VMCOREINFO_OFFSET(page, mapping);
> - VMCOREINFO_OFFSET(page, lru);
> - VMCOREINFO_OFFSET(page, _mapcount);
> - VMCOREINFO_OFFSET(page, private);
> - VMCOREINFO_OFFSET(page, compound_head);
> - VMCOREINFO_OFFSET(pglist_data, node_zones);
> - VMCOREINFO_OFFSET(pglist_data, nr_zones);
> -#ifdef CONFIG_FLATMEM
> - VMCOREINFO_OFFSET(pglist_data, node_mem_map);
> -#endif
> - VMCOREINFO_OFFSET(pglist_data, node_start_pfn);
> - VMCOREINFO_OFFSET(pglist_data, node_spanned_pages);
> - VMCOREINFO_OFFSET(pglist_data, node_id);
> - VMCOREINFO_OFFSET(zone, free_area);
> - VMCOREINFO_OFFSET(zone, vm_stat);
> - VMCOREINFO_OFFSET(zone, spanned_pages);
> - VMCOREINFO_OFFSET(free_area, free_list);
> - VMCOREINFO_OFFSET(list_head, next);
> - VMCOREINFO_OFFSET(list_head, prev);
> - VMCOREINFO_OFFSET(vmap_area, va_start);
> - VMCOREINFO_OFFSET(vmap_area, list);
> - VMCOREINFO_LENGTH(zone.free_area, NR_PAGE_ORDERS);
> - log_buf_vmcoreinfo_setup();
> - VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
> - VMCOREINFO_NUMBER(NR_FREE_PAGES);
> - VMCOREINFO_NUMBER(PG_lru);
> - VMCOREINFO_NUMBER(PG_private);
> - VMCOREINFO_NUMBER(PG_swapcache);
> - VMCOREINFO_NUMBER(PG_swapbacked);
> - VMCOREINFO_NUMBER(PG_slab);
> -#ifdef CONFIG_MEMORY_FAILURE
> - VMCOREINFO_NUMBER(PG_hwpoison);
> -#endif
> - VMCOREINFO_NUMBER(PG_head_mask);
> -#define PAGE_BUDDY_MAPCOUNT_VALUE (~PG_buddy)
> - VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
> -#ifdef CONFIG_HUGETLB_PAGE
> - VMCOREINFO_NUMBER(PG_hugetlb);
> -#define PAGE_OFFLINE_MAPCOUNT_VALUE (~PG_offline)
> - VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE);
> -#endif
> -
> -#ifdef CONFIG_KALLSYMS
> - VMCOREINFO_SYMBOL(kallsyms_names);
> - VMCOREINFO_SYMBOL(kallsyms_num_syms);
> - VMCOREINFO_SYMBOL(kallsyms_token_table);
> - VMCOREINFO_SYMBOL(kallsyms_token_index);
> -#ifdef CONFIG_KALLSYMS_BASE_RELATIVE
> - VMCOREINFO_SYMBOL(kallsyms_offsets);
> - VMCOREINFO_SYMBOL(kallsyms_relative_base);
> -#else
> - VMCOREINFO_SYMBOL(kallsyms_addresses);
> -#endif /* CONFIG_KALLSYMS_BASE_RELATIVE */
> -#endif /* CONFIG_KALLSYMS */
> -
> - arch_crash_save_vmcoreinfo();
> - update_vmcoreinfo_note();
> -
> - return 0;
> -}
> -
> -subsys_initcall(crash_save_vmcoreinfo_init);
> -
> static int __init crash_notes_memory_init(void)
> {
> /* Allocate memory for saving cpu registers. */
> diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
> index 1d4bc493b2f4..11526fc42bc2 100644
> --- a/kernel/ksysfs.c
> +++ b/kernel/ksysfs.c
> @@ -154,7 +154,7 @@ KERNEL_ATTR_RW(kexec_crash_size);
>
> #endif /* CONFIG_KEXEC_CORE */
>
> -#ifdef CONFIG_CRASH_CORE
> +#ifdef CONFIG_VMCORE_INFO
>
> static ssize_t vmcoreinfo_show(struct kobject *kobj,
> struct kobj_attribute *attr, char *buf)
> @@ -177,7 +177,7 @@ KERNEL_ATTR_RO(crash_elfcorehdr_size);
>
> #endif
>
> -#endif /* CONFIG_CRASH_CORE */
> +#endif /* CONFIG_VMCORE_INFO */
>
> /* whether file capabilities are enabled */
> static ssize_t fscaps_show(struct kobject *kobj,
> @@ -265,7 +265,7 @@ static struct attribute * kernel_attrs[] = {
> &kexec_crash_loaded_attr.attr,
> &kexec_crash_size_attr.attr,
> #endif
> -#ifdef CONFIG_CRASH_CORE
> +#ifdef CONFIG_VMCORE_INFO
> &vmcoreinfo_attr.attr,
> #ifdef CONFIG_CRASH_HOTPLUG
> &crash_elfcorehdr_size_attr.attr,
> diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
> index f2444b581e16..7d74b000b43a 100644
> --- a/kernel/printk/printk.c
> +++ b/kernel/printk/printk.c
> @@ -34,7 +34,7 @@
> #include <linux/security.h>
> #include <linux/memblock.h>
> #include <linux/syscalls.h>
> -#include <linux/crash_core.h>
> +#include <linux/vmcore_info.h>
> #include <linux/ratelimit.h>
> #include <linux/kmsg_dump.h>
> #include <linux/syslog.h>
> @@ -951,7 +951,7 @@ const struct file_operations kmsg_fops = {
> .release = devkmsg_release,
> };
>
> -#ifdef CONFIG_CRASH_CORE
> +#ifdef CONFIG_VMCORE_INFO
> /*
> * This appends the listed symbols to /proc/vmcore
> *
> diff --git a/kernel/vmcore_info.c b/kernel/vmcore_info.c
> new file mode 100644
> index 000000000000..84f3663530c8
> --- /dev/null
> +++ b/kernel/vmcore_info.c
> @@ -0,0 +1,233 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * crash.c - kernel crash support code.
> + * Copyright (C) 2002-2004 Eric Biederman <ebiederm@xmission.com>
> + */
> +
> +#include <linux/buildid.h>
> +#include <linux/init.h>
> +#include <linux/utsname.h>
> +#include <linux/vmalloc.h>
> +#include <linux/sizes.h>
> +#include <linux/kexec.h>
> +#include <linux/memory.h>
> +#include <linux/cpuhotplug.h>
> +#include <linux/memblock.h>
> +#include <linux/kexec.h>
> +#include <linux/kmemleak.h>
> +
> +#include <asm/page.h>
> +#include <asm/sections.h>
> +
> +#include <crypto/sha1.h>
> +
> +#include "kallsyms_internal.h"
> +#include "kexec_internal.h"
> +
> +/* vmcoreinfo stuff */
> +unsigned char *vmcoreinfo_data;
> +size_t vmcoreinfo_size;
> +u32 *vmcoreinfo_note;
> +
> +/* trusted vmcoreinfo, e.g. we can make a copy in the crash memory */
> +static unsigned char *vmcoreinfo_data_safecopy;
> +
> +Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
> + void *data, size_t data_len)
> +{
> + struct elf_note *note = (struct elf_note *)buf;
> +
> + note->n_namesz = strlen(name) + 1;
> + note->n_descsz = data_len;
> + note->n_type = type;
> + buf += DIV_ROUND_UP(sizeof(*note), sizeof(Elf_Word));
> + memcpy(buf, name, note->n_namesz);
> + buf += DIV_ROUND_UP(note->n_namesz, sizeof(Elf_Word));
> + memcpy(buf, data, data_len);
> + buf += DIV_ROUND_UP(data_len, sizeof(Elf_Word));
> +
> + return buf;
> +}
> +
> +void final_note(Elf_Word *buf)
> +{
> + memset(buf, 0, sizeof(struct elf_note));
> +}
> +
> +static void update_vmcoreinfo_note(void)
> +{
> + u32 *buf = vmcoreinfo_note;
> +
> + if (!vmcoreinfo_size)
> + return;
> + buf = append_elf_note(buf, VMCOREINFO_NOTE_NAME, 0, vmcoreinfo_data,
> + vmcoreinfo_size);
> + final_note(buf);
> +}
> +
> +void crash_update_vmcoreinfo_safecopy(void *ptr)
> +{
> + if (ptr)
> + memcpy(ptr, vmcoreinfo_data, vmcoreinfo_size);
> +
> + vmcoreinfo_data_safecopy = ptr;
> +}
> +
> +void crash_save_vmcoreinfo(void)
> +{
> + if (!vmcoreinfo_note)
> + return;
> +
> + /* Use the safe copy to generate vmcoreinfo note if have */
> + if (vmcoreinfo_data_safecopy)
> + vmcoreinfo_data = vmcoreinfo_data_safecopy;
> +
> + vmcoreinfo_append_str("CRASHTIME=%lld\n", ktime_get_real_seconds());
> + update_vmcoreinfo_note();
> +}
> +
> +void vmcoreinfo_append_str(const char *fmt, ...)
> +{
> + va_list args;
> + char buf[0x50];
> + size_t r;
> +
> + va_start(args, fmt);
> + r = vscnprintf(buf, sizeof(buf), fmt, args);
> + va_end(args);
> +
> + r = min(r, (size_t)VMCOREINFO_BYTES - vmcoreinfo_size);
> +
> + memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r);
> +
> + vmcoreinfo_size += r;
> +
> + WARN_ONCE(vmcoreinfo_size == VMCOREINFO_BYTES,
> + "vmcoreinfo data exceeds allocated size, truncating");
> +}
> +
> +/*
> + * provide an empty default implementation here -- architecture
> + * code may override this
> + */
> +void __weak arch_crash_save_vmcoreinfo(void)
> +{}
> +
> +phys_addr_t __weak paddr_vmcoreinfo_note(void)
> +{
> + return __pa(vmcoreinfo_note);
> +}
> +EXPORT_SYMBOL(paddr_vmcoreinfo_note);
> +
> +static int __init crash_save_vmcoreinfo_init(void)
> +{
> + vmcoreinfo_data = (unsigned char *)get_zeroed_page(GFP_KERNEL);
> + if (!vmcoreinfo_data) {
> + pr_warn("Memory allocation for vmcoreinfo_data failed\n");
> + return -ENOMEM;
> + }
> +
> + vmcoreinfo_note = alloc_pages_exact(VMCOREINFO_NOTE_SIZE,
> + GFP_KERNEL | __GFP_ZERO);
> + if (!vmcoreinfo_note) {
> + free_page((unsigned long)vmcoreinfo_data);
> + vmcoreinfo_data = NULL;
> + pr_warn("Memory allocation for vmcoreinfo_note failed\n");
> + return -ENOMEM;
> + }
> +
> + VMCOREINFO_OSRELEASE(init_uts_ns.name.release);
> + VMCOREINFO_BUILD_ID();
> + VMCOREINFO_PAGESIZE(PAGE_SIZE);
> +
> + VMCOREINFO_SYMBOL(init_uts_ns);
> + VMCOREINFO_OFFSET(uts_namespace, name);
> + VMCOREINFO_SYMBOL(node_online_map);
> +#ifdef CONFIG_MMU
> + VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir);
> +#endif
> + VMCOREINFO_SYMBOL(_stext);
> + VMCOREINFO_SYMBOL(vmap_area_list);
> +
> +#ifndef CONFIG_NUMA
> + VMCOREINFO_SYMBOL(mem_map);
> + VMCOREINFO_SYMBOL(contig_page_data);
> +#endif
> +#ifdef CONFIG_SPARSEMEM
> + VMCOREINFO_SYMBOL_ARRAY(mem_section);
> + VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS);
> + VMCOREINFO_STRUCT_SIZE(mem_section);
> + VMCOREINFO_OFFSET(mem_section, section_mem_map);
> + VMCOREINFO_NUMBER(SECTION_SIZE_BITS);
> + VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS);
> +#endif
> + VMCOREINFO_STRUCT_SIZE(page);
> + VMCOREINFO_STRUCT_SIZE(pglist_data);
> + VMCOREINFO_STRUCT_SIZE(zone);
> + VMCOREINFO_STRUCT_SIZE(free_area);
> + VMCOREINFO_STRUCT_SIZE(list_head);
> + VMCOREINFO_SIZE(nodemask_t);
> + VMCOREINFO_OFFSET(page, flags);
> + VMCOREINFO_OFFSET(page, _refcount);
> + VMCOREINFO_OFFSET(page, mapping);
> + VMCOREINFO_OFFSET(page, lru);
> + VMCOREINFO_OFFSET(page, _mapcount);
> + VMCOREINFO_OFFSET(page, private);
> + VMCOREINFO_OFFSET(page, compound_head);
> + VMCOREINFO_OFFSET(pglist_data, node_zones);
> + VMCOREINFO_OFFSET(pglist_data, nr_zones);
> +#ifdef CONFIG_FLATMEM
> + VMCOREINFO_OFFSET(pglist_data, node_mem_map);
> +#endif
> + VMCOREINFO_OFFSET(pglist_data, node_start_pfn);
> + VMCOREINFO_OFFSET(pglist_data, node_spanned_pages);
> + VMCOREINFO_OFFSET(pglist_data, node_id);
> + VMCOREINFO_OFFSET(zone, free_area);
> + VMCOREINFO_OFFSET(zone, vm_stat);
> + VMCOREINFO_OFFSET(zone, spanned_pages);
> + VMCOREINFO_OFFSET(free_area, free_list);
> + VMCOREINFO_OFFSET(list_head, next);
> + VMCOREINFO_OFFSET(list_head, prev);
> + VMCOREINFO_OFFSET(vmap_area, va_start);
> + VMCOREINFO_OFFSET(vmap_area, list);
> + VMCOREINFO_LENGTH(zone.free_area, NR_PAGE_ORDERS);
> + log_buf_vmcoreinfo_setup();
> + VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
> + VMCOREINFO_NUMBER(NR_FREE_PAGES);
> + VMCOREINFO_NUMBER(PG_lru);
> + VMCOREINFO_NUMBER(PG_private);
> + VMCOREINFO_NUMBER(PG_swapcache);
> + VMCOREINFO_NUMBER(PG_swapbacked);
> + VMCOREINFO_NUMBER(PG_slab);
> +#ifdef CONFIG_MEMORY_FAILURE
> + VMCOREINFO_NUMBER(PG_hwpoison);
> +#endif
> + VMCOREINFO_NUMBER(PG_head_mask);
> +#define PAGE_BUDDY_MAPCOUNT_VALUE (~PG_buddy)
> + VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
> +#ifdef CONFIG_HUGETLB_PAGE
> + VMCOREINFO_NUMBER(PG_hugetlb);
> +#define PAGE_OFFLINE_MAPCOUNT_VALUE (~PG_offline)
> + VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE);
> +#endif
> +
> +#ifdef CONFIG_KALLSYMS
> + VMCOREINFO_SYMBOL(kallsyms_names);
> + VMCOREINFO_SYMBOL(kallsyms_num_syms);
> + VMCOREINFO_SYMBOL(kallsyms_token_table);
> + VMCOREINFO_SYMBOL(kallsyms_token_index);
> +#ifdef CONFIG_KALLSYMS_BASE_RELATIVE
> + VMCOREINFO_SYMBOL(kallsyms_offsets);
> + VMCOREINFO_SYMBOL(kallsyms_relative_base);
> +#else
> + VMCOREINFO_SYMBOL(kallsyms_addresses);
> +#endif /* CONFIG_KALLSYMS_BASE_RELATIVE */
> +#endif /* CONFIG_KALLSYMS */
> +
> + arch_crash_save_vmcoreinfo();
> + update_vmcoreinfo_note();
> +
> + return 0;
> +}
> +
> +subsys_initcall(crash_save_vmcoreinfo_init);
> diff --git a/lib/buildid.c b/lib/buildid.c
> index e3a7acdeef0e..3e6868c86b45 100644
> --- a/lib/buildid.c
> +++ b/lib/buildid.c
> @@ -174,7 +174,7 @@ int build_id_parse_buf(const void *buf, unsigned char *build_id, u32 buf_size)
> return parse_build_id_buf(build_id, NULL, buf, buf_size);
> }
>
> -#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_CRASH_CORE)
> +#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_VMCORE_INFO)
> unsigned char vmlinux_build_id[BUILD_ID_SIZE_MAX] __ro_after_init;
>
> /**
On 02/21/24 at 11:07pm, Sourabh Jain wrote:
> Hello Baoquan,
>
> On 19/01/24 20:22, Baoquan He wrote:
> > Now move the relevant codes into separate files:
> > kernel/crash_reserve.c, include/linux/crash_reserve.h.
> >
> > And add config item CRASH_RESERVE to control its enabling.
>
> Feels like this patch is more about vmcore_info.[c|h] and CONFIG_VMCORE_INFO
> then the above mentioned files and config.
You are right. Above lines about crash_reserve should be removed. It's
from v1, and done in patch 1 of v2 and v3. I forgot removing them.
>
> >
> > And also update the old ifdeffery of CONFIG_CRASH_CORE, including of
> > <linux/crash_core.h> and config item dependency on CRASH_CORE
> > accordingly.
> >
> > And also do renaming as follows:
> > - arch/xxx/kernel/{crash_core.c => vmcore_info.c}
> > because they are only related to vmcoreinfo exporting on x86, arm64,
> > riscv.
> >
> > And also Remove config item CRASH_CORE, and rely on CONFIG_KEXEC_CORE to
> > decide if build in crash_core.c.
> >
> > Signed-off-by: Baoquan He <bhe@redhat.com>
> > ---
> > arch/arm64/kernel/Makefile | 2 +-
> > .../kernel/{crash_core.c => vmcore_info.c} | 2 +-
> > arch/powerpc/Kconfig | 2 +-
> > arch/powerpc/kernel/setup-common.c | 2 +-
> > arch/powerpc/platforms/powernv/opal-core.c | 2 +-
> > arch/riscv/kernel/Makefile | 2 +-
> > .../kernel/{crash_core.c => vmcore_info.c} | 2 +-
> > arch/x86/kernel/Makefile | 2 +-
> > .../{crash_core_32.c => vmcore_info_32.c} | 2 +-
> > .../{crash_core_64.c => vmcore_info_64.c} | 2 +-
> > drivers/firmware/qemu_fw_cfg.c | 14 +-
> > fs/proc/Kconfig | 2 +-
> > fs/proc/kcore.c | 2 +-
> > include/linux/buildid.h | 2 +-
> > include/linux/crash_core.h | 73 ------
> > include/linux/kexec.h | 1 +
> > include/linux/vmcore_info.h | 81 ++++++
> > kernel/Kconfig.kexec | 4 +-
> > kernel/Makefile | 4 +-
> > kernel/crash_core.c | 208 ----------------
> > kernel/ksysfs.c | 6 +-
> > kernel/printk/printk.c | 4 +-
> > kernel/vmcore_info.c | 233 ++++++++++++++++++
> > lib/buildid.c | 2 +-
> > 24 files changed, 345 insertions(+), 311 deletions(-)
> > rename arch/arm64/kernel/{crash_core.c => vmcore_info.c} (97%)
> > rename arch/riscv/kernel/{crash_core.c => vmcore_info.c} (96%)
> > rename arch/x86/kernel/{crash_core_32.c => vmcore_info_32.c} (90%)
> > rename arch/x86/kernel/{crash_core_64.c => vmcore_info_64.c} (94%)
> > create mode 100644 include/linux/vmcore_info.h
> > create mode 100644 kernel/vmcore_info.c
> >
> > diff --git a/arch/arm64/kernel/Makefile b/arch/arm64/kernel/Makefile
> > index d95b3d6b471a..bcf89587a549 100644
> > --- a/arch/arm64/kernel/Makefile
> > +++ b/arch/arm64/kernel/Makefile
> > @@ -66,7 +66,7 @@ obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file.o kexec_image.o
> > obj-$(CONFIG_ARM64_RELOC_TEST) += arm64-reloc-test.o
> > arm64-reloc-test-y := reloc_test_core.o reloc_test_syms.o
> > obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
> > -obj-$(CONFIG_CRASH_CORE) += crash_core.o
> > +obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o
> > obj-$(CONFIG_ARM_SDE_INTERFACE) += sdei.o
> > obj-$(CONFIG_ARM64_PTR_AUTH) += pointer_auth.o
> > obj-$(CONFIG_ARM64_MTE) += mte.o
> > diff --git a/arch/arm64/kernel/crash_core.c b/arch/arm64/kernel/vmcore_info.c
> > similarity index 97%
> > rename from arch/arm64/kernel/crash_core.c
> > rename to arch/arm64/kernel/vmcore_info.c
> > index 66cde752cd74..a5abf7186922 100644
> > --- a/arch/arm64/kernel/crash_core.c
> > +++ b/arch/arm64/kernel/vmcore_info.c
> > @@ -4,7 +4,7 @@
> > * Copyright (C) Huawei Futurewei Technologies.
> > */
> > -#include <linux/crash_core.h>
> > +#include <linux/vmcore_info.h>
> > #include <asm/cpufeature.h>
> > #include <asm/memory.h>
> > #include <asm/pgtable-hwdef.h>
> > diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> > index 6aeab95f0edd..1520146d7c2c 100644
> > --- a/arch/powerpc/Kconfig
> > +++ b/arch/powerpc/Kconfig
> > @@ -690,7 +690,7 @@ config ARCH_SELECTS_CRASH_DUMP
> > config FA_DUMP
> > bool "Firmware-assisted dump"
> > depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
> > - select CRASH_CORE
> > + select VMCORE_INFO
> > select CRASH_RESERVE
> > select CRASH_DUMP
> > help
> > diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
> > index 9b142b9d5187..733f210ffda1 100644
> > --- a/arch/powerpc/kernel/setup-common.c
> > +++ b/arch/powerpc/kernel/setup-common.c
> > @@ -109,7 +109,7 @@ int ppc_do_canonicalize_irqs;
> > EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
> > #endif
> > -#ifdef CONFIG_CRASH_CORE
> > +#ifdef CONFIG_VMCORE_INFO
> > /* This keeps a track of which one is the crashing cpu. */
> > int crashing_cpu = -1;
> > #endif
> > diff --git a/arch/powerpc/platforms/powernv/opal-core.c b/arch/powerpc/platforms/powernv/opal-core.c
> > index bb7657115f1d..c9a9b759cc92 100644
> > --- a/arch/powerpc/platforms/powernv/opal-core.c
> > +++ b/arch/powerpc/platforms/powernv/opal-core.c
> > @@ -16,7 +16,7 @@
> > #include <linux/kobject.h>
> > #include <linux/sysfs.h>
> > #include <linux/slab.h>
> > -#include <linux/crash_core.h>
> > +#include <linux/vmcore_info.h>
> > #include <linux/of.h>
> > #include <asm/page.h>
> > diff --git a/arch/riscv/kernel/Makefile b/arch/riscv/kernel/Makefile
> > index c92c623b311e..63a36539ea1a 100644
> > --- a/arch/riscv/kernel/Makefile
> > +++ b/arch/riscv/kernel/Makefile
> > @@ -91,7 +91,7 @@ obj-$(CONFIG_KGDB) += kgdb.o
> > obj-$(CONFIG_KEXEC_CORE) += kexec_relocate.o crash_save_regs.o machine_kexec.o
> > obj-$(CONFIG_KEXEC_FILE) += elf_kexec.o machine_kexec_file.o
> > obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
> > -obj-$(CONFIG_CRASH_CORE) += crash_core.o
> > +obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o
> > obj-$(CONFIG_JUMP_LABEL) += jump_label.o
> > diff --git a/arch/riscv/kernel/crash_core.c b/arch/riscv/kernel/vmcore_info.c
> > similarity index 96%
> > rename from arch/riscv/kernel/crash_core.c
> > rename to arch/riscv/kernel/vmcore_info.c
> > index 8706736fd4e2..e8ad57a60a2f 100644
> > --- a/arch/riscv/kernel/crash_core.c
> > +++ b/arch/riscv/kernel/vmcore_info.c
> > @@ -1,6 +1,6 @@
> > // SPDX-License-Identifier: GPL-2.0-only
> > -#include <linux/crash_core.h>
> > +#include <linux/vmcore_info.h>
> > #include <linux/pagemap.h>
> > void arch_crash_save_vmcoreinfo(void)
> > diff --git a/arch/x86/kernel/Makefile b/arch/x86/kernel/Makefile
> > index 0000325ab98f..913d4022131e 100644
> > --- a/arch/x86/kernel/Makefile
> > +++ b/arch/x86/kernel/Makefile
> > @@ -98,7 +98,7 @@ obj-$(CONFIG_FTRACE_SYSCALLS) += ftrace.o
> > obj-$(CONFIG_X86_TSC) += trace_clock.o
> > obj-$(CONFIG_TRACING) += trace.o
> > obj-$(CONFIG_RETHOOK) += rethook.o
> > -obj-$(CONFIG_CRASH_CORE) += crash_core_$(BITS).o
> > +obj-$(CONFIG_VMCORE_INFO) += vmcore_info_$(BITS).o
> > obj-$(CONFIG_KEXEC_CORE) += machine_kexec_$(BITS).o
> > obj-$(CONFIG_KEXEC_CORE) += relocate_kernel_$(BITS).o crash.o
> > obj-$(CONFIG_KEXEC_FILE) += kexec-bzimage64.o
> > diff --git a/arch/x86/kernel/crash_core_32.c b/arch/x86/kernel/vmcore_info_32.c
> > similarity index 90%
> > rename from arch/x86/kernel/crash_core_32.c
> > rename to arch/x86/kernel/vmcore_info_32.c
> > index 8a89c109e20a..5995a749288a 100644
> > --- a/arch/x86/kernel/crash_core_32.c
> > +++ b/arch/x86/kernel/vmcore_info_32.c
> > @@ -1,6 +1,6 @@
> > // SPDX-License-Identifier: GPL-2.0-only
> > -#include <linux/crash_core.h>
> > +#include <linux/vmcore_info.h>
> > #include <linux/pgtable.h>
> > #include <asm/setup.h>
> > diff --git a/arch/x86/kernel/crash_core_64.c b/arch/x86/kernel/vmcore_info_64.c
> > similarity index 94%
> > rename from arch/x86/kernel/crash_core_64.c
> > rename to arch/x86/kernel/vmcore_info_64.c
> > index 7d255f882afe..0dec7d868754 100644
> > --- a/arch/x86/kernel/crash_core_64.c
> > +++ b/arch/x86/kernel/vmcore_info_64.c
> > @@ -1,6 +1,6 @@
> > // SPDX-License-Identifier: GPL-2.0-only
> > -#include <linux/crash_core.h>
> > +#include <linux/vmcore_info.h>
> > #include <linux/pgtable.h>
> > #include <asm/setup.h>
> > diff --git a/drivers/firmware/qemu_fw_cfg.c b/drivers/firmware/qemu_fw_cfg.c
> > index 03da9a4354f8..5f43dfa22f79 100644
> > --- a/drivers/firmware/qemu_fw_cfg.c
> > +++ b/drivers/firmware/qemu_fw_cfg.c
> > @@ -37,7 +37,7 @@
> > #include <uapi/linux/qemu_fw_cfg.h>
> > #include <linux/delay.h>
> > #include <linux/crash_dump.h>
> > -#include <linux/crash_core.h>
> > +#include <linux/vmcore_info.h>
> > MODULE_AUTHOR("Gabriel L. Somlo <somlo@cmu.edu>");
> > MODULE_DESCRIPTION("QEMU fw_cfg sysfs support");
> > @@ -67,7 +67,7 @@ static void fw_cfg_sel_endianness(u16 key)
> > iowrite16(key, fw_cfg_reg_ctrl);
> > }
> > -#ifdef CONFIG_CRASH_CORE
> > +#ifdef CONFIG_VMCORE_INFO
> > static inline bool fw_cfg_dma_enabled(void)
> > {
> > return (fw_cfg_rev & FW_CFG_VERSION_DMA) && fw_cfg_reg_dma;
> > @@ -156,7 +156,7 @@ static ssize_t fw_cfg_read_blob(u16 key,
> > return count;
> > }
> > -#ifdef CONFIG_CRASH_CORE
> > +#ifdef CONFIG_VMCORE_INFO
> > /* write chunk of given fw_cfg blob (caller responsible for sanity-check) */
> > static ssize_t fw_cfg_write_blob(u16 key,
> > void *buf, loff_t pos, size_t count)
> > @@ -195,7 +195,7 @@ static ssize_t fw_cfg_write_blob(u16 key,
> > return ret;
> > }
> > -#endif /* CONFIG_CRASH_CORE */
> > +#endif /* CONFIG_VMCORE_INFO */
> > /* clean up fw_cfg device i/o */
> > static void fw_cfg_io_cleanup(void)
> > @@ -319,7 +319,7 @@ struct fw_cfg_sysfs_entry {
> > struct list_head list;
> > };
> > -#ifdef CONFIG_CRASH_CORE
> > +#ifdef CONFIG_VMCORE_INFO
> > static ssize_t fw_cfg_write_vmcoreinfo(const struct fw_cfg_file *f)
> > {
> > static struct fw_cfg_vmcoreinfo *data;
> > @@ -343,7 +343,7 @@ static ssize_t fw_cfg_write_vmcoreinfo(const struct fw_cfg_file *f)
> > kfree(data);
> > return ret;
> > }
> > -#endif /* CONFIG_CRASH_CORE */
> > +#endif /* CONFIG_VMCORE_INFO */
> > /* get fw_cfg_sysfs_entry from kobject member */
> > static inline struct fw_cfg_sysfs_entry *to_entry(struct kobject *kobj)
> > @@ -583,7 +583,7 @@ static int fw_cfg_register_file(const struct fw_cfg_file *f)
> > int err;
> > struct fw_cfg_sysfs_entry *entry;
> > -#ifdef CONFIG_CRASH_CORE
> > +#ifdef CONFIG_VMCORE_INFO
> > if (fw_cfg_dma_enabled() &&
> > strcmp(f->name, FW_CFG_VMCOREINFO_FILENAME) == 0 &&
> > !is_kdump_kernel()) {
> > diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
> > index 32b1116ae137..d80a1431ef7b 100644
> > --- a/fs/proc/Kconfig
> > +++ b/fs/proc/Kconfig
> > @@ -32,7 +32,7 @@ config PROC_FS
> > config PROC_KCORE
> > bool "/proc/kcore support" if !ARM
> > depends on PROC_FS && MMU
> > - select CRASH_CORE
> > + select VMCORE_INFO
> > help
> > Provides a virtual ELF core file of the live kernel. This can
> > be read with gdb and other ELF tools. No modifications can be
> > diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
> > index 6422e569b080..8e08a9a1b7ed 100644
> > --- a/fs/proc/kcore.c
> > +++ b/fs/proc/kcore.c
> > @@ -10,7 +10,7 @@
> > * Safe accesses to vmalloc/direct-mapped discontiguous areas, Kanoj Sarcar <kanoj@sgi.com>
> > */
> > -#include <linux/crash_core.h>
> > +#include <linux/vmcore_info.h>
> > #include <linux/mm.h>
> > #include <linux/proc_fs.h>
> > #include <linux/kcore.h>
> > diff --git a/include/linux/buildid.h b/include/linux/buildid.h
> > index 8a582d242f06..20aa3c2d89f7 100644
> > --- a/include/linux/buildid.h
> > +++ b/include/linux/buildid.h
> > @@ -11,7 +11,7 @@ int build_id_parse(struct vm_area_struct *vma, unsigned char *build_id,
> > __u32 *size);
> > int build_id_parse_buf(const void *buf, unsigned char *build_id, u32 buf_size);
> > -#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_CRASH_CORE)
> > +#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_VMCORE_INFO)
> > extern unsigned char vmlinux_build_id[BUILD_ID_SIZE_MAX];
> > void init_vmlinux_build_id(void);
> > #else
> > diff --git a/include/linux/crash_core.h b/include/linux/crash_core.h
> > index 1fde49246fa6..7f19f62018ef 100644
> > --- a/include/linux/crash_core.h
> > +++ b/include/linux/crash_core.h
> > @@ -6,79 +6,6 @@
> > #include <linux/elfcore.h>
> > #include <linux/elf.h>
> > -#define CRASH_CORE_NOTE_NAME "CORE"
> > -#define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
> > -#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)
> > -#define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
> > -
> > -/*
> > - * The per-cpu notes area is a list of notes terminated by a "NULL"
> > - * note header. For kdump, the code in vmcore.c runs in the context
> > - * of the second kernel to combine them into one note.
> > - */
> > -#define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
> > - CRASH_CORE_NOTE_NAME_BYTES + \
> > - CRASH_CORE_NOTE_DESC_BYTES)
> > -
> > -#define VMCOREINFO_BYTES PAGE_SIZE
> > -#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
> > -#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
> > -#define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
> > - VMCOREINFO_NOTE_NAME_BYTES + \
> > - VMCOREINFO_BYTES)
> > -
> > -typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
> > -/* Per cpu memory for storing cpu states in case of system crash. */
> > -extern note_buf_t __percpu *crash_notes;
> > -
> > -void crash_update_vmcoreinfo_safecopy(void *ptr);
> > -void crash_save_vmcoreinfo(void);
> > -void arch_crash_save_vmcoreinfo(void);
> > -__printf(1, 2)
> > -void vmcoreinfo_append_str(const char *fmt, ...);
> > -phys_addr_t paddr_vmcoreinfo_note(void);
> > -
> > -#define VMCOREINFO_OSRELEASE(value) \
> > - vmcoreinfo_append_str("OSRELEASE=%s\n", value)
> > -#define VMCOREINFO_BUILD_ID() \
> > - ({ \
> > - static_assert(sizeof(vmlinux_build_id) == 20); \
> > - vmcoreinfo_append_str("BUILD-ID=%20phN\n", vmlinux_build_id); \
> > - })
> > -
> > -#define VMCOREINFO_PAGESIZE(value) \
> > - vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
> > -#define VMCOREINFO_SYMBOL(name) \
> > - vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
> > -#define VMCOREINFO_SYMBOL_ARRAY(name) \
> > - vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name)
> > -#define VMCOREINFO_SIZE(name) \
> > - vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
> > - (unsigned long)sizeof(name))
> > -#define VMCOREINFO_STRUCT_SIZE(name) \
> > - vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
> > - (unsigned long)sizeof(struct name))
> > -#define VMCOREINFO_OFFSET(name, field) \
> > - vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
> > - (unsigned long)offsetof(struct name, field))
> > -#define VMCOREINFO_TYPE_OFFSET(name, field) \
> > - vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
> > - (unsigned long)offsetof(name, field))
> > -#define VMCOREINFO_LENGTH(name, value) \
> > - vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
> > -#define VMCOREINFO_NUMBER(name) \
> > - vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
> > -#define VMCOREINFO_CONFIG(name) \
> > - vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
> > -
> > -extern unsigned char *vmcoreinfo_data;
> > -extern size_t vmcoreinfo_size;
> > -extern u32 *vmcoreinfo_note;
> > -
> > -Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
> > - void *data, size_t data_len);
> > -void final_note(Elf_Word *buf);
> > -
> > /* Alignment required for elf header segment */
> > #define ELF_CORE_HEADER_ALIGN 4096
> > diff --git a/include/linux/kexec.h b/include/linux/kexec.h
> > index 6d79bfb52e5b..9c7bb8b56ed6 100644
> > --- a/include/linux/kexec.h
> > +++ b/include/linux/kexec.h
> > @@ -16,6 +16,7 @@
> > #if !defined(__ASSEMBLY__)
> > #include <linux/crash_core.h>
> > +#include <linux/vmcore_info.h>
> > #include <linux/crash_reserve.h>
> > #include <asm/io.h>
> > #include <linux/range.h>
> > diff --git a/include/linux/vmcore_info.h b/include/linux/vmcore_info.h
> > new file mode 100644
> > index 000000000000..e1dec1a6a749
> > --- /dev/null
> > +++ b/include/linux/vmcore_info.h
> > @@ -0,0 +1,81 @@
> > +/* SPDX-License-Identifier: GPL-2.0 */
> > +#ifndef LINUX_VMCORE_INFO_H
> > +#define LINUX_VMCORE_INFO_H
> > +
> > +#include <linux/linkage.h>
> > +#include <linux/elfcore.h>
> > +#include <linux/elf.h>
> > +
> > +#define CRASH_CORE_NOTE_NAME "CORE"
> > +#define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
> > +#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)
> > +#define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
> > +
> > +/*
> > + * The per-cpu notes area is a list of notes terminated by a "NULL"
> > + * note header. For kdump, the code in vmcore.c runs in the context
> > + * of the second kernel to combine them into one note.
> > + */
> > +#define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
> > + CRASH_CORE_NOTE_NAME_BYTES + \
> > + CRASH_CORE_NOTE_DESC_BYTES)
> > +
> > +#define VMCOREINFO_BYTES PAGE_SIZE
> > +#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
> > +#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
> > +#define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
> > + VMCOREINFO_NOTE_NAME_BYTES + \
> > + VMCOREINFO_BYTES)
> > +
> > +typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
> > +/* Per cpu memory for storing cpu states in case of system crash. */
> > +extern note_buf_t __percpu *crash_notes;
> > +
> > +void crash_update_vmcoreinfo_safecopy(void *ptr);
> > +void crash_save_vmcoreinfo(void);
> > +void arch_crash_save_vmcoreinfo(void);
> > +__printf(1, 2)
> > +void vmcoreinfo_append_str(const char *fmt, ...);
> > +phys_addr_t paddr_vmcoreinfo_note(void);
> > +
> > +#define VMCOREINFO_OSRELEASE(value) \
> > + vmcoreinfo_append_str("OSRELEASE=%s\n", value)
> > +#define VMCOREINFO_BUILD_ID() \
> > + ({ \
> > + static_assert(sizeof(vmlinux_build_id) == 20); \
> > + vmcoreinfo_append_str("BUILD-ID=%20phN\n", vmlinux_build_id); \
> > + })
> > +
> > +#define VMCOREINFO_PAGESIZE(value) \
> > + vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
> > +#define VMCOREINFO_SYMBOL(name) \
> > + vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
> > +#define VMCOREINFO_SYMBOL_ARRAY(name) \
> > + vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name)
> > +#define VMCOREINFO_SIZE(name) \
> > + vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
> > + (unsigned long)sizeof(name))
> > +#define VMCOREINFO_STRUCT_SIZE(name) \
> > + vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
> > + (unsigned long)sizeof(struct name))
> > +#define VMCOREINFO_OFFSET(name, field) \
> > + vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
> > + (unsigned long)offsetof(struct name, field))
> > +#define VMCOREINFO_TYPE_OFFSET(name, field) \
> > + vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
> > + (unsigned long)offsetof(name, field))
> > +#define VMCOREINFO_LENGTH(name, value) \
> > + vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
> > +#define VMCOREINFO_NUMBER(name) \
> > + vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
> > +#define VMCOREINFO_CONFIG(name) \
> > + vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
> > +
> > +extern unsigned char *vmcoreinfo_data;
> > +extern size_t vmcoreinfo_size;
> > +extern u32 *vmcoreinfo_note;
> > +
> > +Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
> > + void *data, size_t data_len);
> > +void final_note(Elf_Word *buf);
> > +#endif /* LINUX_VMCORE_INFO_H */
> > diff --git a/kernel/Kconfig.kexec b/kernel/Kconfig.kexec
> > index 8b7be71edd85..8faf27043432 100644
> > --- a/kernel/Kconfig.kexec
> > +++ b/kernel/Kconfig.kexec
> > @@ -5,11 +5,11 @@ menu "Kexec and crash features"
> > config CRASH_RESERVE
> > bool
> > -config CRASH_CORE
> > +config VMCORE_INFO
> > bool
> > config KEXEC_CORE
> > - select CRASH_CORE
> > + select VMCORE_INFO
> > select CRASH_RESERVE
> > bool
> > diff --git a/kernel/Makefile b/kernel/Makefile
> > index 05fa88b3ab74..649272a1d6b9 100644
> > --- a/kernel/Makefile
> > +++ b/kernel/Makefile
> > @@ -68,9 +68,9 @@ obj-$(CONFIG_MODULE_SIG_FORMAT) += module_signature.o
> > obj-$(CONFIG_KALLSYMS) += kallsyms.o
> > obj-$(CONFIG_KALLSYMS_SELFTEST) += kallsyms_selftest.o
> > obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
> > -obj-$(CONFIG_CRASH_CORE) += crash_core.o
> > +obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o
> > obj-$(CONFIG_CRASH_RESERVE) += crash_reserve.o
> > -obj-$(CONFIG_KEXEC_CORE) += kexec_core.o
> > +obj-$(CONFIG_KEXEC_CORE) += kexec_core.o crash_core.o
> > obj-$(CONFIG_KEXEC) += kexec.o
> > obj-$(CONFIG_KEXEC_FILE) += kexec_file.o
> > obj-$(CONFIG_KEXEC_ELF) += kexec_elf.o
> > diff --git a/kernel/crash_core.c b/kernel/crash_core.c
> > index 055859c62f19..2f4df1fe6f7a 100644
> > --- a/kernel/crash_core.c
> > +++ b/kernel/crash_core.c
> > @@ -26,14 +26,6 @@
> > /* Per cpu memory for storing cpu states in case of system crash. */
> > note_buf_t __percpu *crash_notes;
> > -/* vmcoreinfo stuff */
> > -unsigned char *vmcoreinfo_data;
> > -size_t vmcoreinfo_size;
> > -u32 *vmcoreinfo_note;
> > -
> > -/* trusted vmcoreinfo, e.g. we can make a copy in the crash memory */
> > -static unsigned char *vmcoreinfo_data_safecopy;
> > -
> > int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map,
> > void **addr, unsigned long *sz)
> > {
> > @@ -195,206 +187,6 @@ int crash_exclude_mem_range(struct crash_mem *mem,
> > return 0;
> > }
> > -Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
> > - void *data, size_t data_len)
> > -{
> > - struct elf_note *note = (struct elf_note *)buf;
> > -
> > - note->n_namesz = strlen(name) + 1;
> > - note->n_descsz = data_len;
> > - note->n_type = type;
> > - buf += DIV_ROUND_UP(sizeof(*note), sizeof(Elf_Word));
> > - memcpy(buf, name, note->n_namesz);
> > - buf += DIV_ROUND_UP(note->n_namesz, sizeof(Elf_Word));
> > - memcpy(buf, data, data_len);
> > - buf += DIV_ROUND_UP(data_len, sizeof(Elf_Word));
> > -
> > - return buf;
> > -}
> > -
> > -void final_note(Elf_Word *buf)
> > -{
> > - memset(buf, 0, sizeof(struct elf_note));
> > -}
> > -
> > -static void update_vmcoreinfo_note(void)
> > -{
> > - u32 *buf = vmcoreinfo_note;
> > -
> > - if (!vmcoreinfo_size)
> > - return;
> > - buf = append_elf_note(buf, VMCOREINFO_NOTE_NAME, 0, vmcoreinfo_data,
> > - vmcoreinfo_size);
> > - final_note(buf);
> > -}
> > -
> > -void crash_update_vmcoreinfo_safecopy(void *ptr)
> > -{
> > - if (ptr)
> > - memcpy(ptr, vmcoreinfo_data, vmcoreinfo_size);
> > -
> > - vmcoreinfo_data_safecopy = ptr;
> > -}
> > -
> > -void crash_save_vmcoreinfo(void)
> > -{
> > - if (!vmcoreinfo_note)
> > - return;
> > -
> > - /* Use the safe copy to generate vmcoreinfo note if have */
> > - if (vmcoreinfo_data_safecopy)
> > - vmcoreinfo_data = vmcoreinfo_data_safecopy;
> > -
> > - vmcoreinfo_append_str("CRASHTIME=%lld\n", ktime_get_real_seconds());
> > - update_vmcoreinfo_note();
> > -}
> > -
> > -void vmcoreinfo_append_str(const char *fmt, ...)
> > -{
> > - va_list args;
> > - char buf[0x50];
> > - size_t r;
> > -
> > - va_start(args, fmt);
> > - r = vscnprintf(buf, sizeof(buf), fmt, args);
> > - va_end(args);
> > -
> > - r = min(r, (size_t)VMCOREINFO_BYTES - vmcoreinfo_size);
> > -
> > - memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r);
> > -
> > - vmcoreinfo_size += r;
> > -
> > - WARN_ONCE(vmcoreinfo_size == VMCOREINFO_BYTES,
> > - "vmcoreinfo data exceeds allocated size, truncating");
> > -}
> > -
> > -/*
> > - * provide an empty default implementation here -- architecture
> > - * code may override this
> > - */
> > -void __weak arch_crash_save_vmcoreinfo(void)
> > -{}
> > -
> > -phys_addr_t __weak paddr_vmcoreinfo_note(void)
> > -{
> > - return __pa(vmcoreinfo_note);
> > -}
> > -EXPORT_SYMBOL(paddr_vmcoreinfo_note);
> > -
> > -static int __init crash_save_vmcoreinfo_init(void)
> > -{
> > - vmcoreinfo_data = (unsigned char *)get_zeroed_page(GFP_KERNEL);
> > - if (!vmcoreinfo_data) {
> > - pr_warn("Memory allocation for vmcoreinfo_data failed\n");
> > - return -ENOMEM;
> > - }
> > -
> > - vmcoreinfo_note = alloc_pages_exact(VMCOREINFO_NOTE_SIZE,
> > - GFP_KERNEL | __GFP_ZERO);
> > - if (!vmcoreinfo_note) {
> > - free_page((unsigned long)vmcoreinfo_data);
> > - vmcoreinfo_data = NULL;
> > - pr_warn("Memory allocation for vmcoreinfo_note failed\n");
> > - return -ENOMEM;
> > - }
> > -
> > - VMCOREINFO_OSRELEASE(init_uts_ns.name.release);
> > - VMCOREINFO_BUILD_ID();
> > - VMCOREINFO_PAGESIZE(PAGE_SIZE);
> > -
> > - VMCOREINFO_SYMBOL(init_uts_ns);
> > - VMCOREINFO_OFFSET(uts_namespace, name);
> > - VMCOREINFO_SYMBOL(node_online_map);
> > -#ifdef CONFIG_MMU
> > - VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir);
> > -#endif
> > - VMCOREINFO_SYMBOL(_stext);
> > - VMCOREINFO_SYMBOL(vmap_area_list);
> > -
> > -#ifndef CONFIG_NUMA
> > - VMCOREINFO_SYMBOL(mem_map);
> > - VMCOREINFO_SYMBOL(contig_page_data);
> > -#endif
> > -#ifdef CONFIG_SPARSEMEM
> > - VMCOREINFO_SYMBOL_ARRAY(mem_section);
> > - VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS);
> > - VMCOREINFO_STRUCT_SIZE(mem_section);
> > - VMCOREINFO_OFFSET(mem_section, section_mem_map);
> > - VMCOREINFO_NUMBER(SECTION_SIZE_BITS);
> > - VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS);
> > -#endif
> > - VMCOREINFO_STRUCT_SIZE(page);
> > - VMCOREINFO_STRUCT_SIZE(pglist_data);
> > - VMCOREINFO_STRUCT_SIZE(zone);
> > - VMCOREINFO_STRUCT_SIZE(free_area);
> > - VMCOREINFO_STRUCT_SIZE(list_head);
> > - VMCOREINFO_SIZE(nodemask_t);
> > - VMCOREINFO_OFFSET(page, flags);
> > - VMCOREINFO_OFFSET(page, _refcount);
> > - VMCOREINFO_OFFSET(page, mapping);
> > - VMCOREINFO_OFFSET(page, lru);
> > - VMCOREINFO_OFFSET(page, _mapcount);
> > - VMCOREINFO_OFFSET(page, private);
> > - VMCOREINFO_OFFSET(page, compound_head);
> > - VMCOREINFO_OFFSET(pglist_data, node_zones);
> > - VMCOREINFO_OFFSET(pglist_data, nr_zones);
> > -#ifdef CONFIG_FLATMEM
> > - VMCOREINFO_OFFSET(pglist_data, node_mem_map);
> > -#endif
> > - VMCOREINFO_OFFSET(pglist_data, node_start_pfn);
> > - VMCOREINFO_OFFSET(pglist_data, node_spanned_pages);
> > - VMCOREINFO_OFFSET(pglist_data, node_id);
> > - VMCOREINFO_OFFSET(zone, free_area);
> > - VMCOREINFO_OFFSET(zone, vm_stat);
> > - VMCOREINFO_OFFSET(zone, spanned_pages);
> > - VMCOREINFO_OFFSET(free_area, free_list);
> > - VMCOREINFO_OFFSET(list_head, next);
> > - VMCOREINFO_OFFSET(list_head, prev);
> > - VMCOREINFO_OFFSET(vmap_area, va_start);
> > - VMCOREINFO_OFFSET(vmap_area, list);
> > - VMCOREINFO_LENGTH(zone.free_area, NR_PAGE_ORDERS);
> > - log_buf_vmcoreinfo_setup();
> > - VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
> > - VMCOREINFO_NUMBER(NR_FREE_PAGES);
> > - VMCOREINFO_NUMBER(PG_lru);
> > - VMCOREINFO_NUMBER(PG_private);
> > - VMCOREINFO_NUMBER(PG_swapcache);
> > - VMCOREINFO_NUMBER(PG_swapbacked);
> > - VMCOREINFO_NUMBER(PG_slab);
> > -#ifdef CONFIG_MEMORY_FAILURE
> > - VMCOREINFO_NUMBER(PG_hwpoison);
> > -#endif
> > - VMCOREINFO_NUMBER(PG_head_mask);
> > -#define PAGE_BUDDY_MAPCOUNT_VALUE (~PG_buddy)
> > - VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
> > -#ifdef CONFIG_HUGETLB_PAGE
> > - VMCOREINFO_NUMBER(PG_hugetlb);
> > -#define PAGE_OFFLINE_MAPCOUNT_VALUE (~PG_offline)
> > - VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE);
> > -#endif
> > -
> > -#ifdef CONFIG_KALLSYMS
> > - VMCOREINFO_SYMBOL(kallsyms_names);
> > - VMCOREINFO_SYMBOL(kallsyms_num_syms);
> > - VMCOREINFO_SYMBOL(kallsyms_token_table);
> > - VMCOREINFO_SYMBOL(kallsyms_token_index);
> > -#ifdef CONFIG_KALLSYMS_BASE_RELATIVE
> > - VMCOREINFO_SYMBOL(kallsyms_offsets);
> > - VMCOREINFO_SYMBOL(kallsyms_relative_base);
> > -#else
> > - VMCOREINFO_SYMBOL(kallsyms_addresses);
> > -#endif /* CONFIG_KALLSYMS_BASE_RELATIVE */
> > -#endif /* CONFIG_KALLSYMS */
> > -
> > - arch_crash_save_vmcoreinfo();
> > - update_vmcoreinfo_note();
> > -
> > - return 0;
> > -}
> > -
> > -subsys_initcall(crash_save_vmcoreinfo_init);
> > -
> > static int __init crash_notes_memory_init(void)
> > {
> > /* Allocate memory for saving cpu registers. */
> > diff --git a/kernel/ksysfs.c b/kernel/ksysfs.c
> > index 1d4bc493b2f4..11526fc42bc2 100644
> > --- a/kernel/ksysfs.c
> > +++ b/kernel/ksysfs.c
> > @@ -154,7 +154,7 @@ KERNEL_ATTR_RW(kexec_crash_size);
> > #endif /* CONFIG_KEXEC_CORE */
> > -#ifdef CONFIG_CRASH_CORE
> > +#ifdef CONFIG_VMCORE_INFO
> > static ssize_t vmcoreinfo_show(struct kobject *kobj,
> > struct kobj_attribute *attr, char *buf)
> > @@ -177,7 +177,7 @@ KERNEL_ATTR_RO(crash_elfcorehdr_size);
> > #endif
> > -#endif /* CONFIG_CRASH_CORE */
> > +#endif /* CONFIG_VMCORE_INFO */
> > /* whether file capabilities are enabled */
> > static ssize_t fscaps_show(struct kobject *kobj,
> > @@ -265,7 +265,7 @@ static struct attribute * kernel_attrs[] = {
> > &kexec_crash_loaded_attr.attr,
> > &kexec_crash_size_attr.attr,
> > #endif
> > -#ifdef CONFIG_CRASH_CORE
> > +#ifdef CONFIG_VMCORE_INFO
> > &vmcoreinfo_attr.attr,
> > #ifdef CONFIG_CRASH_HOTPLUG
> > &crash_elfcorehdr_size_attr.attr,
> > diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c
> > index f2444b581e16..7d74b000b43a 100644
> > --- a/kernel/printk/printk.c
> > +++ b/kernel/printk/printk.c
> > @@ -34,7 +34,7 @@
> > #include <linux/security.h>
> > #include <linux/memblock.h>
> > #include <linux/syscalls.h>
> > -#include <linux/crash_core.h>
> > +#include <linux/vmcore_info.h>
> > #include <linux/ratelimit.h>
> > #include <linux/kmsg_dump.h>
> > #include <linux/syslog.h>
> > @@ -951,7 +951,7 @@ const struct file_operations kmsg_fops = {
> > .release = devkmsg_release,
> > };
> > -#ifdef CONFIG_CRASH_CORE
> > +#ifdef CONFIG_VMCORE_INFO
> > /*
> > * This appends the listed symbols to /proc/vmcore
> > *
> > diff --git a/kernel/vmcore_info.c b/kernel/vmcore_info.c
> > new file mode 100644
> > index 000000000000..84f3663530c8
> > --- /dev/null
> > +++ b/kernel/vmcore_info.c
> > @@ -0,0 +1,233 @@
> > +// SPDX-License-Identifier: GPL-2.0-only
> > +/*
> > + * crash.c - kernel crash support code.
> > + * Copyright (C) 2002-2004 Eric Biederman <ebiederm@xmission.com>
> > + */
> > +
> > +#include <linux/buildid.h>
> > +#include <linux/init.h>
> > +#include <linux/utsname.h>
> > +#include <linux/vmalloc.h>
> > +#include <linux/sizes.h>
> > +#include <linux/kexec.h>
> > +#include <linux/memory.h>
> > +#include <linux/cpuhotplug.h>
> > +#include <linux/memblock.h>
> > +#include <linux/kexec.h>
> > +#include <linux/kmemleak.h>
> > +
> > +#include <asm/page.h>
> > +#include <asm/sections.h>
> > +
> > +#include <crypto/sha1.h>
> > +
> > +#include "kallsyms_internal.h"
> > +#include "kexec_internal.h"
> > +
> > +/* vmcoreinfo stuff */
> > +unsigned char *vmcoreinfo_data;
> > +size_t vmcoreinfo_size;
> > +u32 *vmcoreinfo_note;
> > +
> > +/* trusted vmcoreinfo, e.g. we can make a copy in the crash memory */
> > +static unsigned char *vmcoreinfo_data_safecopy;
> > +
> > +Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
> > + void *data, size_t data_len)
> > +{
> > + struct elf_note *note = (struct elf_note *)buf;
> > +
> > + note->n_namesz = strlen(name) + 1;
> > + note->n_descsz = data_len;
> > + note->n_type = type;
> > + buf += DIV_ROUND_UP(sizeof(*note), sizeof(Elf_Word));
> > + memcpy(buf, name, note->n_namesz);
> > + buf += DIV_ROUND_UP(note->n_namesz, sizeof(Elf_Word));
> > + memcpy(buf, data, data_len);
> > + buf += DIV_ROUND_UP(data_len, sizeof(Elf_Word));
> > +
> > + return buf;
> > +}
> > +
> > +void final_note(Elf_Word *buf)
> > +{
> > + memset(buf, 0, sizeof(struct elf_note));
> > +}
> > +
> > +static void update_vmcoreinfo_note(void)
> > +{
> > + u32 *buf = vmcoreinfo_note;
> > +
> > + if (!vmcoreinfo_size)
> > + return;
> > + buf = append_elf_note(buf, VMCOREINFO_NOTE_NAME, 0, vmcoreinfo_data,
> > + vmcoreinfo_size);
> > + final_note(buf);
> > +}
> > +
> > +void crash_update_vmcoreinfo_safecopy(void *ptr)
> > +{
> > + if (ptr)
> > + memcpy(ptr, vmcoreinfo_data, vmcoreinfo_size);
> > +
> > + vmcoreinfo_data_safecopy = ptr;
> > +}
> > +
> > +void crash_save_vmcoreinfo(void)
> > +{
> > + if (!vmcoreinfo_note)
> > + return;
> > +
> > + /* Use the safe copy to generate vmcoreinfo note if have */
> > + if (vmcoreinfo_data_safecopy)
> > + vmcoreinfo_data = vmcoreinfo_data_safecopy;
> > +
> > + vmcoreinfo_append_str("CRASHTIME=%lld\n", ktime_get_real_seconds());
> > + update_vmcoreinfo_note();
> > +}
> > +
> > +void vmcoreinfo_append_str(const char *fmt, ...)
> > +{
> > + va_list args;
> > + char buf[0x50];
> > + size_t r;
> > +
> > + va_start(args, fmt);
> > + r = vscnprintf(buf, sizeof(buf), fmt, args);
> > + va_end(args);
> > +
> > + r = min(r, (size_t)VMCOREINFO_BYTES - vmcoreinfo_size);
> > +
> > + memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r);
> > +
> > + vmcoreinfo_size += r;
> > +
> > + WARN_ONCE(vmcoreinfo_size == VMCOREINFO_BYTES,
> > + "vmcoreinfo data exceeds allocated size, truncating");
> > +}
> > +
> > +/*
> > + * provide an empty default implementation here -- architecture
> > + * code may override this
> > + */
> > +void __weak arch_crash_save_vmcoreinfo(void)
> > +{}
> > +
> > +phys_addr_t __weak paddr_vmcoreinfo_note(void)
> > +{
> > + return __pa(vmcoreinfo_note);
> > +}
> > +EXPORT_SYMBOL(paddr_vmcoreinfo_note);
> > +
> > +static int __init crash_save_vmcoreinfo_init(void)
> > +{
> > + vmcoreinfo_data = (unsigned char *)get_zeroed_page(GFP_KERNEL);
> > + if (!vmcoreinfo_data) {
> > + pr_warn("Memory allocation for vmcoreinfo_data failed\n");
> > + return -ENOMEM;
> > + }
> > +
> > + vmcoreinfo_note = alloc_pages_exact(VMCOREINFO_NOTE_SIZE,
> > + GFP_KERNEL | __GFP_ZERO);
> > + if (!vmcoreinfo_note) {
> > + free_page((unsigned long)vmcoreinfo_data);
> > + vmcoreinfo_data = NULL;
> > + pr_warn("Memory allocation for vmcoreinfo_note failed\n");
> > + return -ENOMEM;
> > + }
> > +
> > + VMCOREINFO_OSRELEASE(init_uts_ns.name.release);
> > + VMCOREINFO_BUILD_ID();
> > + VMCOREINFO_PAGESIZE(PAGE_SIZE);
> > +
> > + VMCOREINFO_SYMBOL(init_uts_ns);
> > + VMCOREINFO_OFFSET(uts_namespace, name);
> > + VMCOREINFO_SYMBOL(node_online_map);
> > +#ifdef CONFIG_MMU
> > + VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir);
> > +#endif
> > + VMCOREINFO_SYMBOL(_stext);
> > + VMCOREINFO_SYMBOL(vmap_area_list);
> > +
> > +#ifndef CONFIG_NUMA
> > + VMCOREINFO_SYMBOL(mem_map);
> > + VMCOREINFO_SYMBOL(contig_page_data);
> > +#endif
> > +#ifdef CONFIG_SPARSEMEM
> > + VMCOREINFO_SYMBOL_ARRAY(mem_section);
> > + VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS);
> > + VMCOREINFO_STRUCT_SIZE(mem_section);
> > + VMCOREINFO_OFFSET(mem_section, section_mem_map);
> > + VMCOREINFO_NUMBER(SECTION_SIZE_BITS);
> > + VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS);
> > +#endif
> > + VMCOREINFO_STRUCT_SIZE(page);
> > + VMCOREINFO_STRUCT_SIZE(pglist_data);
> > + VMCOREINFO_STRUCT_SIZE(zone);
> > + VMCOREINFO_STRUCT_SIZE(free_area);
> > + VMCOREINFO_STRUCT_SIZE(list_head);
> > + VMCOREINFO_SIZE(nodemask_t);
> > + VMCOREINFO_OFFSET(page, flags);
> > + VMCOREINFO_OFFSET(page, _refcount);
> > + VMCOREINFO_OFFSET(page, mapping);
> > + VMCOREINFO_OFFSET(page, lru);
> > + VMCOREINFO_OFFSET(page, _mapcount);
> > + VMCOREINFO_OFFSET(page, private);
> > + VMCOREINFO_OFFSET(page, compound_head);
> > + VMCOREINFO_OFFSET(pglist_data, node_zones);
> > + VMCOREINFO_OFFSET(pglist_data, nr_zones);
> > +#ifdef CONFIG_FLATMEM
> > + VMCOREINFO_OFFSET(pglist_data, node_mem_map);
> > +#endif
> > + VMCOREINFO_OFFSET(pglist_data, node_start_pfn);
> > + VMCOREINFO_OFFSET(pglist_data, node_spanned_pages);
> > + VMCOREINFO_OFFSET(pglist_data, node_id);
> > + VMCOREINFO_OFFSET(zone, free_area);
> > + VMCOREINFO_OFFSET(zone, vm_stat);
> > + VMCOREINFO_OFFSET(zone, spanned_pages);
> > + VMCOREINFO_OFFSET(free_area, free_list);
> > + VMCOREINFO_OFFSET(list_head, next);
> > + VMCOREINFO_OFFSET(list_head, prev);
> > + VMCOREINFO_OFFSET(vmap_area, va_start);
> > + VMCOREINFO_OFFSET(vmap_area, list);
> > + VMCOREINFO_LENGTH(zone.free_area, NR_PAGE_ORDERS);
> > + log_buf_vmcoreinfo_setup();
> > + VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
> > + VMCOREINFO_NUMBER(NR_FREE_PAGES);
> > + VMCOREINFO_NUMBER(PG_lru);
> > + VMCOREINFO_NUMBER(PG_private);
> > + VMCOREINFO_NUMBER(PG_swapcache);
> > + VMCOREINFO_NUMBER(PG_swapbacked);
> > + VMCOREINFO_NUMBER(PG_slab);
> > +#ifdef CONFIG_MEMORY_FAILURE
> > + VMCOREINFO_NUMBER(PG_hwpoison);
> > +#endif
> > + VMCOREINFO_NUMBER(PG_head_mask);
> > +#define PAGE_BUDDY_MAPCOUNT_VALUE (~PG_buddy)
> > + VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
> > +#ifdef CONFIG_HUGETLB_PAGE
> > + VMCOREINFO_NUMBER(PG_hugetlb);
> > +#define PAGE_OFFLINE_MAPCOUNT_VALUE (~PG_offline)
> > + VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE);
> > +#endif
> > +
> > +#ifdef CONFIG_KALLSYMS
> > + VMCOREINFO_SYMBOL(kallsyms_names);
> > + VMCOREINFO_SYMBOL(kallsyms_num_syms);
> > + VMCOREINFO_SYMBOL(kallsyms_token_table);
> > + VMCOREINFO_SYMBOL(kallsyms_token_index);
> > +#ifdef CONFIG_KALLSYMS_BASE_RELATIVE
> > + VMCOREINFO_SYMBOL(kallsyms_offsets);
> > + VMCOREINFO_SYMBOL(kallsyms_relative_base);
> > +#else
> > + VMCOREINFO_SYMBOL(kallsyms_addresses);
> > +#endif /* CONFIG_KALLSYMS_BASE_RELATIVE */
> > +#endif /* CONFIG_KALLSYMS */
> > +
> > + arch_crash_save_vmcoreinfo();
> > + update_vmcoreinfo_note();
> > +
> > + return 0;
> > +}
> > +
> > +subsys_initcall(crash_save_vmcoreinfo_init);
> > diff --git a/lib/buildid.c b/lib/buildid.c
> > index e3a7acdeef0e..3e6868c86b45 100644
> > --- a/lib/buildid.c
> > +++ b/lib/buildid.c
> > @@ -174,7 +174,7 @@ int build_id_parse_buf(const void *buf, unsigned char *build_id, u32 buf_size)
> > return parse_build_id_buf(build_id, NULL, buf, buf_size);
> > }
> > -#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_CRASH_CORE)
> > +#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_VMCORE_INFO)
> > unsigned char vmlinux_build_id[BUILD_ID_SIZE_MAX] __ro_after_init;
> > /**
>
@@ -66,7 +66,7 @@ obj-$(CONFIG_KEXEC_FILE) += machine_kexec_file.o kexec_image.o
obj-$(CONFIG_ARM64_RELOC_TEST) += arm64-reloc-test.o
arm64-reloc-test-y := reloc_test_core.o reloc_test_syms.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
-obj-$(CONFIG_CRASH_CORE) += crash_core.o
+obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o
obj-$(CONFIG_ARM_SDE_INTERFACE) += sdei.o
obj-$(CONFIG_ARM64_PTR_AUTH) += pointer_auth.o
obj-$(CONFIG_ARM64_MTE) += mte.o
similarity index 97%
rename from arch/arm64/kernel/crash_core.c
rename to arch/arm64/kernel/vmcore_info.c
@@ -4,7 +4,7 @@
* Copyright (C) Huawei Futurewei Technologies.
*/
-#include <linux/crash_core.h>
+#include <linux/vmcore_info.h>
#include <asm/cpufeature.h>
#include <asm/memory.h>
#include <asm/pgtable-hwdef.h>
@@ -690,7 +690,7 @@ config ARCH_SELECTS_CRASH_DUMP
config FA_DUMP
bool "Firmware-assisted dump"
depends on PPC64 && (PPC_RTAS || PPC_POWERNV)
- select CRASH_CORE
+ select VMCORE_INFO
select CRASH_RESERVE
select CRASH_DUMP
help
@@ -109,7 +109,7 @@ int ppc_do_canonicalize_irqs;
EXPORT_SYMBOL(ppc_do_canonicalize_irqs);
#endif
-#ifdef CONFIG_CRASH_CORE
+#ifdef CONFIG_VMCORE_INFO
/* This keeps a track of which one is the crashing cpu. */
int crashing_cpu = -1;
#endif
@@ -16,7 +16,7 @@
#include <linux/kobject.h>
#include <linux/sysfs.h>
#include <linux/slab.h>
-#include <linux/crash_core.h>
+#include <linux/vmcore_info.h>
#include <linux/of.h>
#include <asm/page.h>
@@ -91,7 +91,7 @@ obj-$(CONFIG_KGDB) += kgdb.o
obj-$(CONFIG_KEXEC_CORE) += kexec_relocate.o crash_save_regs.o machine_kexec.o
obj-$(CONFIG_KEXEC_FILE) += elf_kexec.o machine_kexec_file.o
obj-$(CONFIG_CRASH_DUMP) += crash_dump.o
-obj-$(CONFIG_CRASH_CORE) += crash_core.o
+obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o
obj-$(CONFIG_JUMP_LABEL) += jump_label.o
similarity index 96%
rename from arch/riscv/kernel/crash_core.c
rename to arch/riscv/kernel/vmcore_info.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
-#include <linux/crash_core.h>
+#include <linux/vmcore_info.h>
#include <linux/pagemap.h>
void arch_crash_save_vmcoreinfo(void)
@@ -98,7 +98,7 @@ obj-$(CONFIG_FTRACE_SYSCALLS) += ftrace.o
obj-$(CONFIG_X86_TSC) += trace_clock.o
obj-$(CONFIG_TRACING) += trace.o
obj-$(CONFIG_RETHOOK) += rethook.o
-obj-$(CONFIG_CRASH_CORE) += crash_core_$(BITS).o
+obj-$(CONFIG_VMCORE_INFO) += vmcore_info_$(BITS).o
obj-$(CONFIG_KEXEC_CORE) += machine_kexec_$(BITS).o
obj-$(CONFIG_KEXEC_CORE) += relocate_kernel_$(BITS).o crash.o
obj-$(CONFIG_KEXEC_FILE) += kexec-bzimage64.o
similarity index 90%
rename from arch/x86/kernel/crash_core_32.c
rename to arch/x86/kernel/vmcore_info_32.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
-#include <linux/crash_core.h>
+#include <linux/vmcore_info.h>
#include <linux/pgtable.h>
#include <asm/setup.h>
similarity index 94%
rename from arch/x86/kernel/crash_core_64.c
rename to arch/x86/kernel/vmcore_info_64.c
@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
-#include <linux/crash_core.h>
+#include <linux/vmcore_info.h>
#include <linux/pgtable.h>
#include <asm/setup.h>
@@ -37,7 +37,7 @@
#include <uapi/linux/qemu_fw_cfg.h>
#include <linux/delay.h>
#include <linux/crash_dump.h>
-#include <linux/crash_core.h>
+#include <linux/vmcore_info.h>
MODULE_AUTHOR("Gabriel L. Somlo <somlo@cmu.edu>");
MODULE_DESCRIPTION("QEMU fw_cfg sysfs support");
@@ -67,7 +67,7 @@ static void fw_cfg_sel_endianness(u16 key)
iowrite16(key, fw_cfg_reg_ctrl);
}
-#ifdef CONFIG_CRASH_CORE
+#ifdef CONFIG_VMCORE_INFO
static inline bool fw_cfg_dma_enabled(void)
{
return (fw_cfg_rev & FW_CFG_VERSION_DMA) && fw_cfg_reg_dma;
@@ -156,7 +156,7 @@ static ssize_t fw_cfg_read_blob(u16 key,
return count;
}
-#ifdef CONFIG_CRASH_CORE
+#ifdef CONFIG_VMCORE_INFO
/* write chunk of given fw_cfg blob (caller responsible for sanity-check) */
static ssize_t fw_cfg_write_blob(u16 key,
void *buf, loff_t pos, size_t count)
@@ -195,7 +195,7 @@ static ssize_t fw_cfg_write_blob(u16 key,
return ret;
}
-#endif /* CONFIG_CRASH_CORE */
+#endif /* CONFIG_VMCORE_INFO */
/* clean up fw_cfg device i/o */
static void fw_cfg_io_cleanup(void)
@@ -319,7 +319,7 @@ struct fw_cfg_sysfs_entry {
struct list_head list;
};
-#ifdef CONFIG_CRASH_CORE
+#ifdef CONFIG_VMCORE_INFO
static ssize_t fw_cfg_write_vmcoreinfo(const struct fw_cfg_file *f)
{
static struct fw_cfg_vmcoreinfo *data;
@@ -343,7 +343,7 @@ static ssize_t fw_cfg_write_vmcoreinfo(const struct fw_cfg_file *f)
kfree(data);
return ret;
}
-#endif /* CONFIG_CRASH_CORE */
+#endif /* CONFIG_VMCORE_INFO */
/* get fw_cfg_sysfs_entry from kobject member */
static inline struct fw_cfg_sysfs_entry *to_entry(struct kobject *kobj)
@@ -583,7 +583,7 @@ static int fw_cfg_register_file(const struct fw_cfg_file *f)
int err;
struct fw_cfg_sysfs_entry *entry;
-#ifdef CONFIG_CRASH_CORE
+#ifdef CONFIG_VMCORE_INFO
if (fw_cfg_dma_enabled() &&
strcmp(f->name, FW_CFG_VMCOREINFO_FILENAME) == 0 &&
!is_kdump_kernel()) {
@@ -32,7 +32,7 @@ config PROC_FS
config PROC_KCORE
bool "/proc/kcore support" if !ARM
depends on PROC_FS && MMU
- select CRASH_CORE
+ select VMCORE_INFO
help
Provides a virtual ELF core file of the live kernel. This can
be read with gdb and other ELF tools. No modifications can be
@@ -10,7 +10,7 @@
* Safe accesses to vmalloc/direct-mapped discontiguous areas, Kanoj Sarcar <kanoj@sgi.com>
*/
-#include <linux/crash_core.h>
+#include <linux/vmcore_info.h>
#include <linux/mm.h>
#include <linux/proc_fs.h>
#include <linux/kcore.h>
@@ -11,7 +11,7 @@ int build_id_parse(struct vm_area_struct *vma, unsigned char *build_id,
__u32 *size);
int build_id_parse_buf(const void *buf, unsigned char *build_id, u32 buf_size);
-#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_CRASH_CORE)
+#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_VMCORE_INFO)
extern unsigned char vmlinux_build_id[BUILD_ID_SIZE_MAX];
void init_vmlinux_build_id(void);
#else
@@ -6,79 +6,6 @@
#include <linux/elfcore.h>
#include <linux/elf.h>
-#define CRASH_CORE_NOTE_NAME "CORE"
-#define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
-#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)
-#define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
-
-/*
- * The per-cpu notes area is a list of notes terminated by a "NULL"
- * note header. For kdump, the code in vmcore.c runs in the context
- * of the second kernel to combine them into one note.
- */
-#define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
- CRASH_CORE_NOTE_NAME_BYTES + \
- CRASH_CORE_NOTE_DESC_BYTES)
-
-#define VMCOREINFO_BYTES PAGE_SIZE
-#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
-#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
-#define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
- VMCOREINFO_NOTE_NAME_BYTES + \
- VMCOREINFO_BYTES)
-
-typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
-/* Per cpu memory for storing cpu states in case of system crash. */
-extern note_buf_t __percpu *crash_notes;
-
-void crash_update_vmcoreinfo_safecopy(void *ptr);
-void crash_save_vmcoreinfo(void);
-void arch_crash_save_vmcoreinfo(void);
-__printf(1, 2)
-void vmcoreinfo_append_str(const char *fmt, ...);
-phys_addr_t paddr_vmcoreinfo_note(void);
-
-#define VMCOREINFO_OSRELEASE(value) \
- vmcoreinfo_append_str("OSRELEASE=%s\n", value)
-#define VMCOREINFO_BUILD_ID() \
- ({ \
- static_assert(sizeof(vmlinux_build_id) == 20); \
- vmcoreinfo_append_str("BUILD-ID=%20phN\n", vmlinux_build_id); \
- })
-
-#define VMCOREINFO_PAGESIZE(value) \
- vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
-#define VMCOREINFO_SYMBOL(name) \
- vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
-#define VMCOREINFO_SYMBOL_ARRAY(name) \
- vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name)
-#define VMCOREINFO_SIZE(name) \
- vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
- (unsigned long)sizeof(name))
-#define VMCOREINFO_STRUCT_SIZE(name) \
- vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
- (unsigned long)sizeof(struct name))
-#define VMCOREINFO_OFFSET(name, field) \
- vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
- (unsigned long)offsetof(struct name, field))
-#define VMCOREINFO_TYPE_OFFSET(name, field) \
- vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
- (unsigned long)offsetof(name, field))
-#define VMCOREINFO_LENGTH(name, value) \
- vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
-#define VMCOREINFO_NUMBER(name) \
- vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
-#define VMCOREINFO_CONFIG(name) \
- vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
-
-extern unsigned char *vmcoreinfo_data;
-extern size_t vmcoreinfo_size;
-extern u32 *vmcoreinfo_note;
-
-Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
- void *data, size_t data_len);
-void final_note(Elf_Word *buf);
-
/* Alignment required for elf header segment */
#define ELF_CORE_HEADER_ALIGN 4096
@@ -16,6 +16,7 @@
#if !defined(__ASSEMBLY__)
#include <linux/crash_core.h>
+#include <linux/vmcore_info.h>
#include <linux/crash_reserve.h>
#include <asm/io.h>
#include <linux/range.h>
new file mode 100644
@@ -0,0 +1,81 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef LINUX_VMCORE_INFO_H
+#define LINUX_VMCORE_INFO_H
+
+#include <linux/linkage.h>
+#include <linux/elfcore.h>
+#include <linux/elf.h>
+
+#define CRASH_CORE_NOTE_NAME "CORE"
+#define CRASH_CORE_NOTE_HEAD_BYTES ALIGN(sizeof(struct elf_note), 4)
+#define CRASH_CORE_NOTE_NAME_BYTES ALIGN(sizeof(CRASH_CORE_NOTE_NAME), 4)
+#define CRASH_CORE_NOTE_DESC_BYTES ALIGN(sizeof(struct elf_prstatus), 4)
+
+/*
+ * The per-cpu notes area is a list of notes terminated by a "NULL"
+ * note header. For kdump, the code in vmcore.c runs in the context
+ * of the second kernel to combine them into one note.
+ */
+#define CRASH_CORE_NOTE_BYTES ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
+ CRASH_CORE_NOTE_NAME_BYTES + \
+ CRASH_CORE_NOTE_DESC_BYTES)
+
+#define VMCOREINFO_BYTES PAGE_SIZE
+#define VMCOREINFO_NOTE_NAME "VMCOREINFO"
+#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
+#define VMCOREINFO_NOTE_SIZE ((CRASH_CORE_NOTE_HEAD_BYTES * 2) + \
+ VMCOREINFO_NOTE_NAME_BYTES + \
+ VMCOREINFO_BYTES)
+
+typedef u32 note_buf_t[CRASH_CORE_NOTE_BYTES/4];
+/* Per cpu memory for storing cpu states in case of system crash. */
+extern note_buf_t __percpu *crash_notes;
+
+void crash_update_vmcoreinfo_safecopy(void *ptr);
+void crash_save_vmcoreinfo(void);
+void arch_crash_save_vmcoreinfo(void);
+__printf(1, 2)
+void vmcoreinfo_append_str(const char *fmt, ...);
+phys_addr_t paddr_vmcoreinfo_note(void);
+
+#define VMCOREINFO_OSRELEASE(value) \
+ vmcoreinfo_append_str("OSRELEASE=%s\n", value)
+#define VMCOREINFO_BUILD_ID() \
+ ({ \
+ static_assert(sizeof(vmlinux_build_id) == 20); \
+ vmcoreinfo_append_str("BUILD-ID=%20phN\n", vmlinux_build_id); \
+ })
+
+#define VMCOREINFO_PAGESIZE(value) \
+ vmcoreinfo_append_str("PAGESIZE=%ld\n", value)
+#define VMCOREINFO_SYMBOL(name) \
+ vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)&name)
+#define VMCOREINFO_SYMBOL_ARRAY(name) \
+ vmcoreinfo_append_str("SYMBOL(%s)=%lx\n", #name, (unsigned long)name)
+#define VMCOREINFO_SIZE(name) \
+ vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
+ (unsigned long)sizeof(name))
+#define VMCOREINFO_STRUCT_SIZE(name) \
+ vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
+ (unsigned long)sizeof(struct name))
+#define VMCOREINFO_OFFSET(name, field) \
+ vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
+ (unsigned long)offsetof(struct name, field))
+#define VMCOREINFO_TYPE_OFFSET(name, field) \
+ vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
+ (unsigned long)offsetof(name, field))
+#define VMCOREINFO_LENGTH(name, value) \
+ vmcoreinfo_append_str("LENGTH(%s)=%lu\n", #name, (unsigned long)value)
+#define VMCOREINFO_NUMBER(name) \
+ vmcoreinfo_append_str("NUMBER(%s)=%ld\n", #name, (long)name)
+#define VMCOREINFO_CONFIG(name) \
+ vmcoreinfo_append_str("CONFIG_%s=y\n", #name)
+
+extern unsigned char *vmcoreinfo_data;
+extern size_t vmcoreinfo_size;
+extern u32 *vmcoreinfo_note;
+
+Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
+ void *data, size_t data_len);
+void final_note(Elf_Word *buf);
+#endif /* LINUX_VMCORE_INFO_H */
@@ -5,11 +5,11 @@ menu "Kexec and crash features"
config CRASH_RESERVE
bool
-config CRASH_CORE
+config VMCORE_INFO
bool
config KEXEC_CORE
- select CRASH_CORE
+ select VMCORE_INFO
select CRASH_RESERVE
bool
@@ -68,9 +68,9 @@ obj-$(CONFIG_MODULE_SIG_FORMAT) += module_signature.o
obj-$(CONFIG_KALLSYMS) += kallsyms.o
obj-$(CONFIG_KALLSYMS_SELFTEST) += kallsyms_selftest.o
obj-$(CONFIG_BSD_PROCESS_ACCT) += acct.o
-obj-$(CONFIG_CRASH_CORE) += crash_core.o
+obj-$(CONFIG_VMCORE_INFO) += vmcore_info.o
obj-$(CONFIG_CRASH_RESERVE) += crash_reserve.o
-obj-$(CONFIG_KEXEC_CORE) += kexec_core.o
+obj-$(CONFIG_KEXEC_CORE) += kexec_core.o crash_core.o
obj-$(CONFIG_KEXEC) += kexec.o
obj-$(CONFIG_KEXEC_FILE) += kexec_file.o
obj-$(CONFIG_KEXEC_ELF) += kexec_elf.o
@@ -26,14 +26,6 @@
/* Per cpu memory for storing cpu states in case of system crash. */
note_buf_t __percpu *crash_notes;
-/* vmcoreinfo stuff */
-unsigned char *vmcoreinfo_data;
-size_t vmcoreinfo_size;
-u32 *vmcoreinfo_note;
-
-/* trusted vmcoreinfo, e.g. we can make a copy in the crash memory */
-static unsigned char *vmcoreinfo_data_safecopy;
-
int crash_prepare_elf64_headers(struct crash_mem *mem, int need_kernel_map,
void **addr, unsigned long *sz)
{
@@ -195,206 +187,6 @@ int crash_exclude_mem_range(struct crash_mem *mem,
return 0;
}
-Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
- void *data, size_t data_len)
-{
- struct elf_note *note = (struct elf_note *)buf;
-
- note->n_namesz = strlen(name) + 1;
- note->n_descsz = data_len;
- note->n_type = type;
- buf += DIV_ROUND_UP(sizeof(*note), sizeof(Elf_Word));
- memcpy(buf, name, note->n_namesz);
- buf += DIV_ROUND_UP(note->n_namesz, sizeof(Elf_Word));
- memcpy(buf, data, data_len);
- buf += DIV_ROUND_UP(data_len, sizeof(Elf_Word));
-
- return buf;
-}
-
-void final_note(Elf_Word *buf)
-{
- memset(buf, 0, sizeof(struct elf_note));
-}
-
-static void update_vmcoreinfo_note(void)
-{
- u32 *buf = vmcoreinfo_note;
-
- if (!vmcoreinfo_size)
- return;
- buf = append_elf_note(buf, VMCOREINFO_NOTE_NAME, 0, vmcoreinfo_data,
- vmcoreinfo_size);
- final_note(buf);
-}
-
-void crash_update_vmcoreinfo_safecopy(void *ptr)
-{
- if (ptr)
- memcpy(ptr, vmcoreinfo_data, vmcoreinfo_size);
-
- vmcoreinfo_data_safecopy = ptr;
-}
-
-void crash_save_vmcoreinfo(void)
-{
- if (!vmcoreinfo_note)
- return;
-
- /* Use the safe copy to generate vmcoreinfo note if have */
- if (vmcoreinfo_data_safecopy)
- vmcoreinfo_data = vmcoreinfo_data_safecopy;
-
- vmcoreinfo_append_str("CRASHTIME=%lld\n", ktime_get_real_seconds());
- update_vmcoreinfo_note();
-}
-
-void vmcoreinfo_append_str(const char *fmt, ...)
-{
- va_list args;
- char buf[0x50];
- size_t r;
-
- va_start(args, fmt);
- r = vscnprintf(buf, sizeof(buf), fmt, args);
- va_end(args);
-
- r = min(r, (size_t)VMCOREINFO_BYTES - vmcoreinfo_size);
-
- memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r);
-
- vmcoreinfo_size += r;
-
- WARN_ONCE(vmcoreinfo_size == VMCOREINFO_BYTES,
- "vmcoreinfo data exceeds allocated size, truncating");
-}
-
-/*
- * provide an empty default implementation here -- architecture
- * code may override this
- */
-void __weak arch_crash_save_vmcoreinfo(void)
-{}
-
-phys_addr_t __weak paddr_vmcoreinfo_note(void)
-{
- return __pa(vmcoreinfo_note);
-}
-EXPORT_SYMBOL(paddr_vmcoreinfo_note);
-
-static int __init crash_save_vmcoreinfo_init(void)
-{
- vmcoreinfo_data = (unsigned char *)get_zeroed_page(GFP_KERNEL);
- if (!vmcoreinfo_data) {
- pr_warn("Memory allocation for vmcoreinfo_data failed\n");
- return -ENOMEM;
- }
-
- vmcoreinfo_note = alloc_pages_exact(VMCOREINFO_NOTE_SIZE,
- GFP_KERNEL | __GFP_ZERO);
- if (!vmcoreinfo_note) {
- free_page((unsigned long)vmcoreinfo_data);
- vmcoreinfo_data = NULL;
- pr_warn("Memory allocation for vmcoreinfo_note failed\n");
- return -ENOMEM;
- }
-
- VMCOREINFO_OSRELEASE(init_uts_ns.name.release);
- VMCOREINFO_BUILD_ID();
- VMCOREINFO_PAGESIZE(PAGE_SIZE);
-
- VMCOREINFO_SYMBOL(init_uts_ns);
- VMCOREINFO_OFFSET(uts_namespace, name);
- VMCOREINFO_SYMBOL(node_online_map);
-#ifdef CONFIG_MMU
- VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir);
-#endif
- VMCOREINFO_SYMBOL(_stext);
- VMCOREINFO_SYMBOL(vmap_area_list);
-
-#ifndef CONFIG_NUMA
- VMCOREINFO_SYMBOL(mem_map);
- VMCOREINFO_SYMBOL(contig_page_data);
-#endif
-#ifdef CONFIG_SPARSEMEM
- VMCOREINFO_SYMBOL_ARRAY(mem_section);
- VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS);
- VMCOREINFO_STRUCT_SIZE(mem_section);
- VMCOREINFO_OFFSET(mem_section, section_mem_map);
- VMCOREINFO_NUMBER(SECTION_SIZE_BITS);
- VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS);
-#endif
- VMCOREINFO_STRUCT_SIZE(page);
- VMCOREINFO_STRUCT_SIZE(pglist_data);
- VMCOREINFO_STRUCT_SIZE(zone);
- VMCOREINFO_STRUCT_SIZE(free_area);
- VMCOREINFO_STRUCT_SIZE(list_head);
- VMCOREINFO_SIZE(nodemask_t);
- VMCOREINFO_OFFSET(page, flags);
- VMCOREINFO_OFFSET(page, _refcount);
- VMCOREINFO_OFFSET(page, mapping);
- VMCOREINFO_OFFSET(page, lru);
- VMCOREINFO_OFFSET(page, _mapcount);
- VMCOREINFO_OFFSET(page, private);
- VMCOREINFO_OFFSET(page, compound_head);
- VMCOREINFO_OFFSET(pglist_data, node_zones);
- VMCOREINFO_OFFSET(pglist_data, nr_zones);
-#ifdef CONFIG_FLATMEM
- VMCOREINFO_OFFSET(pglist_data, node_mem_map);
-#endif
- VMCOREINFO_OFFSET(pglist_data, node_start_pfn);
- VMCOREINFO_OFFSET(pglist_data, node_spanned_pages);
- VMCOREINFO_OFFSET(pglist_data, node_id);
- VMCOREINFO_OFFSET(zone, free_area);
- VMCOREINFO_OFFSET(zone, vm_stat);
- VMCOREINFO_OFFSET(zone, spanned_pages);
- VMCOREINFO_OFFSET(free_area, free_list);
- VMCOREINFO_OFFSET(list_head, next);
- VMCOREINFO_OFFSET(list_head, prev);
- VMCOREINFO_OFFSET(vmap_area, va_start);
- VMCOREINFO_OFFSET(vmap_area, list);
- VMCOREINFO_LENGTH(zone.free_area, NR_PAGE_ORDERS);
- log_buf_vmcoreinfo_setup();
- VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
- VMCOREINFO_NUMBER(NR_FREE_PAGES);
- VMCOREINFO_NUMBER(PG_lru);
- VMCOREINFO_NUMBER(PG_private);
- VMCOREINFO_NUMBER(PG_swapcache);
- VMCOREINFO_NUMBER(PG_swapbacked);
- VMCOREINFO_NUMBER(PG_slab);
-#ifdef CONFIG_MEMORY_FAILURE
- VMCOREINFO_NUMBER(PG_hwpoison);
-#endif
- VMCOREINFO_NUMBER(PG_head_mask);
-#define PAGE_BUDDY_MAPCOUNT_VALUE (~PG_buddy)
- VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
-#ifdef CONFIG_HUGETLB_PAGE
- VMCOREINFO_NUMBER(PG_hugetlb);
-#define PAGE_OFFLINE_MAPCOUNT_VALUE (~PG_offline)
- VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE);
-#endif
-
-#ifdef CONFIG_KALLSYMS
- VMCOREINFO_SYMBOL(kallsyms_names);
- VMCOREINFO_SYMBOL(kallsyms_num_syms);
- VMCOREINFO_SYMBOL(kallsyms_token_table);
- VMCOREINFO_SYMBOL(kallsyms_token_index);
-#ifdef CONFIG_KALLSYMS_BASE_RELATIVE
- VMCOREINFO_SYMBOL(kallsyms_offsets);
- VMCOREINFO_SYMBOL(kallsyms_relative_base);
-#else
- VMCOREINFO_SYMBOL(kallsyms_addresses);
-#endif /* CONFIG_KALLSYMS_BASE_RELATIVE */
-#endif /* CONFIG_KALLSYMS */
-
- arch_crash_save_vmcoreinfo();
- update_vmcoreinfo_note();
-
- return 0;
-}
-
-subsys_initcall(crash_save_vmcoreinfo_init);
-
static int __init crash_notes_memory_init(void)
{
/* Allocate memory for saving cpu registers. */
@@ -154,7 +154,7 @@ KERNEL_ATTR_RW(kexec_crash_size);
#endif /* CONFIG_KEXEC_CORE */
-#ifdef CONFIG_CRASH_CORE
+#ifdef CONFIG_VMCORE_INFO
static ssize_t vmcoreinfo_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
@@ -177,7 +177,7 @@ KERNEL_ATTR_RO(crash_elfcorehdr_size);
#endif
-#endif /* CONFIG_CRASH_CORE */
+#endif /* CONFIG_VMCORE_INFO */
/* whether file capabilities are enabled */
static ssize_t fscaps_show(struct kobject *kobj,
@@ -265,7 +265,7 @@ static struct attribute * kernel_attrs[] = {
&kexec_crash_loaded_attr.attr,
&kexec_crash_size_attr.attr,
#endif
-#ifdef CONFIG_CRASH_CORE
+#ifdef CONFIG_VMCORE_INFO
&vmcoreinfo_attr.attr,
#ifdef CONFIG_CRASH_HOTPLUG
&crash_elfcorehdr_size_attr.attr,
@@ -34,7 +34,7 @@
#include <linux/security.h>
#include <linux/memblock.h>
#include <linux/syscalls.h>
-#include <linux/crash_core.h>
+#include <linux/vmcore_info.h>
#include <linux/ratelimit.h>
#include <linux/kmsg_dump.h>
#include <linux/syslog.h>
@@ -951,7 +951,7 @@ const struct file_operations kmsg_fops = {
.release = devkmsg_release,
};
-#ifdef CONFIG_CRASH_CORE
+#ifdef CONFIG_VMCORE_INFO
/*
* This appends the listed symbols to /proc/vmcore
*
new file mode 100644
@@ -0,0 +1,233 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * crash.c - kernel crash support code.
+ * Copyright (C) 2002-2004 Eric Biederman <ebiederm@xmission.com>
+ */
+
+#include <linux/buildid.h>
+#include <linux/init.h>
+#include <linux/utsname.h>
+#include <linux/vmalloc.h>
+#include <linux/sizes.h>
+#include <linux/kexec.h>
+#include <linux/memory.h>
+#include <linux/cpuhotplug.h>
+#include <linux/memblock.h>
+#include <linux/kexec.h>
+#include <linux/kmemleak.h>
+
+#include <asm/page.h>
+#include <asm/sections.h>
+
+#include <crypto/sha1.h>
+
+#include "kallsyms_internal.h"
+#include "kexec_internal.h"
+
+/* vmcoreinfo stuff */
+unsigned char *vmcoreinfo_data;
+size_t vmcoreinfo_size;
+u32 *vmcoreinfo_note;
+
+/* trusted vmcoreinfo, e.g. we can make a copy in the crash memory */
+static unsigned char *vmcoreinfo_data_safecopy;
+
+Elf_Word *append_elf_note(Elf_Word *buf, char *name, unsigned int type,
+ void *data, size_t data_len)
+{
+ struct elf_note *note = (struct elf_note *)buf;
+
+ note->n_namesz = strlen(name) + 1;
+ note->n_descsz = data_len;
+ note->n_type = type;
+ buf += DIV_ROUND_UP(sizeof(*note), sizeof(Elf_Word));
+ memcpy(buf, name, note->n_namesz);
+ buf += DIV_ROUND_UP(note->n_namesz, sizeof(Elf_Word));
+ memcpy(buf, data, data_len);
+ buf += DIV_ROUND_UP(data_len, sizeof(Elf_Word));
+
+ return buf;
+}
+
+void final_note(Elf_Word *buf)
+{
+ memset(buf, 0, sizeof(struct elf_note));
+}
+
+static void update_vmcoreinfo_note(void)
+{
+ u32 *buf = vmcoreinfo_note;
+
+ if (!vmcoreinfo_size)
+ return;
+ buf = append_elf_note(buf, VMCOREINFO_NOTE_NAME, 0, vmcoreinfo_data,
+ vmcoreinfo_size);
+ final_note(buf);
+}
+
+void crash_update_vmcoreinfo_safecopy(void *ptr)
+{
+ if (ptr)
+ memcpy(ptr, vmcoreinfo_data, vmcoreinfo_size);
+
+ vmcoreinfo_data_safecopy = ptr;
+}
+
+void crash_save_vmcoreinfo(void)
+{
+ if (!vmcoreinfo_note)
+ return;
+
+ /* Use the safe copy to generate vmcoreinfo note if have */
+ if (vmcoreinfo_data_safecopy)
+ vmcoreinfo_data = vmcoreinfo_data_safecopy;
+
+ vmcoreinfo_append_str("CRASHTIME=%lld\n", ktime_get_real_seconds());
+ update_vmcoreinfo_note();
+}
+
+void vmcoreinfo_append_str(const char *fmt, ...)
+{
+ va_list args;
+ char buf[0x50];
+ size_t r;
+
+ va_start(args, fmt);
+ r = vscnprintf(buf, sizeof(buf), fmt, args);
+ va_end(args);
+
+ r = min(r, (size_t)VMCOREINFO_BYTES - vmcoreinfo_size);
+
+ memcpy(&vmcoreinfo_data[vmcoreinfo_size], buf, r);
+
+ vmcoreinfo_size += r;
+
+ WARN_ONCE(vmcoreinfo_size == VMCOREINFO_BYTES,
+ "vmcoreinfo data exceeds allocated size, truncating");
+}
+
+/*
+ * provide an empty default implementation here -- architecture
+ * code may override this
+ */
+void __weak arch_crash_save_vmcoreinfo(void)
+{}
+
+phys_addr_t __weak paddr_vmcoreinfo_note(void)
+{
+ return __pa(vmcoreinfo_note);
+}
+EXPORT_SYMBOL(paddr_vmcoreinfo_note);
+
+static int __init crash_save_vmcoreinfo_init(void)
+{
+ vmcoreinfo_data = (unsigned char *)get_zeroed_page(GFP_KERNEL);
+ if (!vmcoreinfo_data) {
+ pr_warn("Memory allocation for vmcoreinfo_data failed\n");
+ return -ENOMEM;
+ }
+
+ vmcoreinfo_note = alloc_pages_exact(VMCOREINFO_NOTE_SIZE,
+ GFP_KERNEL | __GFP_ZERO);
+ if (!vmcoreinfo_note) {
+ free_page((unsigned long)vmcoreinfo_data);
+ vmcoreinfo_data = NULL;
+ pr_warn("Memory allocation for vmcoreinfo_note failed\n");
+ return -ENOMEM;
+ }
+
+ VMCOREINFO_OSRELEASE(init_uts_ns.name.release);
+ VMCOREINFO_BUILD_ID();
+ VMCOREINFO_PAGESIZE(PAGE_SIZE);
+
+ VMCOREINFO_SYMBOL(init_uts_ns);
+ VMCOREINFO_OFFSET(uts_namespace, name);
+ VMCOREINFO_SYMBOL(node_online_map);
+#ifdef CONFIG_MMU
+ VMCOREINFO_SYMBOL_ARRAY(swapper_pg_dir);
+#endif
+ VMCOREINFO_SYMBOL(_stext);
+ VMCOREINFO_SYMBOL(vmap_area_list);
+
+#ifndef CONFIG_NUMA
+ VMCOREINFO_SYMBOL(mem_map);
+ VMCOREINFO_SYMBOL(contig_page_data);
+#endif
+#ifdef CONFIG_SPARSEMEM
+ VMCOREINFO_SYMBOL_ARRAY(mem_section);
+ VMCOREINFO_LENGTH(mem_section, NR_SECTION_ROOTS);
+ VMCOREINFO_STRUCT_SIZE(mem_section);
+ VMCOREINFO_OFFSET(mem_section, section_mem_map);
+ VMCOREINFO_NUMBER(SECTION_SIZE_BITS);
+ VMCOREINFO_NUMBER(MAX_PHYSMEM_BITS);
+#endif
+ VMCOREINFO_STRUCT_SIZE(page);
+ VMCOREINFO_STRUCT_SIZE(pglist_data);
+ VMCOREINFO_STRUCT_SIZE(zone);
+ VMCOREINFO_STRUCT_SIZE(free_area);
+ VMCOREINFO_STRUCT_SIZE(list_head);
+ VMCOREINFO_SIZE(nodemask_t);
+ VMCOREINFO_OFFSET(page, flags);
+ VMCOREINFO_OFFSET(page, _refcount);
+ VMCOREINFO_OFFSET(page, mapping);
+ VMCOREINFO_OFFSET(page, lru);
+ VMCOREINFO_OFFSET(page, _mapcount);
+ VMCOREINFO_OFFSET(page, private);
+ VMCOREINFO_OFFSET(page, compound_head);
+ VMCOREINFO_OFFSET(pglist_data, node_zones);
+ VMCOREINFO_OFFSET(pglist_data, nr_zones);
+#ifdef CONFIG_FLATMEM
+ VMCOREINFO_OFFSET(pglist_data, node_mem_map);
+#endif
+ VMCOREINFO_OFFSET(pglist_data, node_start_pfn);
+ VMCOREINFO_OFFSET(pglist_data, node_spanned_pages);
+ VMCOREINFO_OFFSET(pglist_data, node_id);
+ VMCOREINFO_OFFSET(zone, free_area);
+ VMCOREINFO_OFFSET(zone, vm_stat);
+ VMCOREINFO_OFFSET(zone, spanned_pages);
+ VMCOREINFO_OFFSET(free_area, free_list);
+ VMCOREINFO_OFFSET(list_head, next);
+ VMCOREINFO_OFFSET(list_head, prev);
+ VMCOREINFO_OFFSET(vmap_area, va_start);
+ VMCOREINFO_OFFSET(vmap_area, list);
+ VMCOREINFO_LENGTH(zone.free_area, NR_PAGE_ORDERS);
+ log_buf_vmcoreinfo_setup();
+ VMCOREINFO_LENGTH(free_area.free_list, MIGRATE_TYPES);
+ VMCOREINFO_NUMBER(NR_FREE_PAGES);
+ VMCOREINFO_NUMBER(PG_lru);
+ VMCOREINFO_NUMBER(PG_private);
+ VMCOREINFO_NUMBER(PG_swapcache);
+ VMCOREINFO_NUMBER(PG_swapbacked);
+ VMCOREINFO_NUMBER(PG_slab);
+#ifdef CONFIG_MEMORY_FAILURE
+ VMCOREINFO_NUMBER(PG_hwpoison);
+#endif
+ VMCOREINFO_NUMBER(PG_head_mask);
+#define PAGE_BUDDY_MAPCOUNT_VALUE (~PG_buddy)
+ VMCOREINFO_NUMBER(PAGE_BUDDY_MAPCOUNT_VALUE);
+#ifdef CONFIG_HUGETLB_PAGE
+ VMCOREINFO_NUMBER(PG_hugetlb);
+#define PAGE_OFFLINE_MAPCOUNT_VALUE (~PG_offline)
+ VMCOREINFO_NUMBER(PAGE_OFFLINE_MAPCOUNT_VALUE);
+#endif
+
+#ifdef CONFIG_KALLSYMS
+ VMCOREINFO_SYMBOL(kallsyms_names);
+ VMCOREINFO_SYMBOL(kallsyms_num_syms);
+ VMCOREINFO_SYMBOL(kallsyms_token_table);
+ VMCOREINFO_SYMBOL(kallsyms_token_index);
+#ifdef CONFIG_KALLSYMS_BASE_RELATIVE
+ VMCOREINFO_SYMBOL(kallsyms_offsets);
+ VMCOREINFO_SYMBOL(kallsyms_relative_base);
+#else
+ VMCOREINFO_SYMBOL(kallsyms_addresses);
+#endif /* CONFIG_KALLSYMS_BASE_RELATIVE */
+#endif /* CONFIG_KALLSYMS */
+
+ arch_crash_save_vmcoreinfo();
+ update_vmcoreinfo_note();
+
+ return 0;
+}
+
+subsys_initcall(crash_save_vmcoreinfo_init);
@@ -174,7 +174,7 @@ int build_id_parse_buf(const void *buf, unsigned char *build_id, u32 buf_size)
return parse_build_id_buf(build_id, NULL, buf, buf_size);
}
-#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_CRASH_CORE)
+#if IS_ENABLED(CONFIG_STACKTRACE_BUILD_ID) || IS_ENABLED(CONFIG_VMCORE_INFO)
unsigned char vmlinux_build_id[BUILD_ID_SIZE_MAX] __ro_after_init;
/**