1 files changed, 33 insertions, 0 deletions

diff --git a/include/linux/kexec.h b/include/linux/kexec.h
index 8c2c7fcd58ce..ad4b82ce84af 100644
--- a/include/linux/kexec.h
+++ b/include/linux/kexec.h
@@ -121,6 +121,30 @@ extern struct page *kimage_alloc_control_pages(struct kimage *image,
 extern void crash_kexec(struct pt_regs *);
 int kexec_should_crash(struct task_struct *);
 void crash_save_cpu(struct pt_regs *regs, int cpu);
+void crash_save_vmcoreinfo(void);
+void arch_crash_save_vmcoreinfo(void);
+void vmcoreinfo_append_str(const char *fmt, ...)
+        __attribute__ ((format (printf, 1, 2)));
+unsigned long paddr_vmcoreinfo_note(void);
+
+#define VMCOREINFO_SYMBOL(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(struct name))
+#define VMCOREINFO_TYPEDEF_SIZE(name) \
+        vmcoreinfo_append_str("SIZE(%s)=%lu\n", #name, \
+                              (unsigned long)sizeof(name))
+#define VMCOREINFO_OFFSET(name, field) \
+        vmcoreinfo_append_str("OFFSET(%s.%s)=%lu\n", #name, #field, \
+                              (unsigned long)&(((struct name *)0)->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 struct kimage *kexec_image;
 extern struct kimage *kexec_crash_image;
 
@@ -148,11 +172,20 @@ extern struct kimage *kexec_crash_image;
 
 #define KEXEC_FLAGS    (KEXEC_ON_CRASH)  /* List of defined/legal kexec flags */
 
+#define VMCOREINFO_BYTES           (4096)
+#define VMCOREINFO_NOTE_NAME       "VMCOREINFO"
+#define VMCOREINFO_NOTE_NAME_BYTES ALIGN(sizeof(VMCOREINFO_NOTE_NAME), 4)
+#define VMCOREINFO_NOTE_SIZE       (KEXEC_NOTE_HEAD_BYTES*2 + VMCOREINFO_BYTES \
+                                    + VMCOREINFO_NOTE_NAME_BYTES)
+
 /* Location of a reserved region to hold the crash kernel.
  */
 extern struct resource crashk_res;
 typedef u32 note_buf_t[KEXEC_NOTE_BYTES/4];
 extern note_buf_t *crash_notes;
+extern u32 vmcoreinfo_note[VMCOREINFO_NOTE_SIZE/4];
+extern size_t vmcoreinfo_size;
+extern size_t vmcoreinfo_max_size;
 
 
 #else /* !CONFIG_KEXEC */