| Message ID | 20240119145241.769622-3-bhe@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Split crash out from kexec and clean up related config items | expand |
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; > > /** >
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; /**
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