[RFC][PATCH v3 14/16] kernel/vmcoreinfo: Register kmemdump core image information

[Eugen Hristev <eugen.hristev@linaro.org>]

The coreimage generated by kmemdump requires some kernel information
in order to be successfully loaded by `crash` or gdb.
Register all this information through vmcoreinfo once vmcoreinfo is setup.

Signed-off-by: Eugen Hristev <eugen.hristev@linaro.org>
---
 kernel/vmcore_info.c | 141 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)

diff --git a/kernel/vmcore_info.c b/kernel/vmcore_info.c
index 3e2e846ba9c8..1d83e95cf9be 100644
--- a/kernel/vmcore_info.c
+++ b/kernel/vmcore_info.c
@@ -15,6 +15,7 @@
 #include <linux/memblock.h>
 #include <linux/kmemleak.h>
 #include <linux/kmemdump.h>
+#include <linux/sched/stat.h>
 
 #include <asm/page.h>
 #include <asm/sections.h>
@@ -24,6 +25,17 @@
 #include "kallsyms_internal.h"
 #include "kexec_internal.h"
 
+void sched_get_runqueues_area(void **start, size_t *size);
+
+extern unsigned int nr_irqs;
+extern unsigned long tainted_mask;
+extern unsigned int nr_swapfiles;
+
+#ifdef CONFIG_IKCONFIG_PROC
+extern char kernel_config_data;
+extern char kernel_config_data_end;
+#endif
+
 /* vmcoreinfo stuff */
 unsigned char *vmcoreinfo_data;
 size_t vmcoreinfo_size;
@@ -121,8 +133,137 @@ EXPORT_SYMBOL(paddr_vmcoreinfo_note);
 
 static void vmcoreinfo_kmemdump(void)
 {
+	void *start;
+	size_t size;
+	int i;
+
 	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_VMCOREINFO,
 			     (void *)vmcoreinfo_data, vmcoreinfo_size);
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_linux_banner,
+			     (void *)&linux_banner, banner_len);
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_init_uts_ns,
+			     (void *)&init_uts_ns, sizeof(init_uts_ns));
+
+	sched_get_runqueues_area(&start, &size);
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_runqueues,
+			     (void *)start, size);
+
+#ifdef CONFIG_IKCONFIG_PROC
+	/* Register 8 bytes before and after, to catch the marker too */
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_CONFIG,
+			     (void *)&kernel_config_data - 8,
+			     &kernel_config_data_end - &kernel_config_data + 16);
+#endif
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE___cpu_possible_mask,
+			     (void *)&__cpu_possible_mask,
+			     sizeof(__cpu_possible_mask));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE___cpu_active_mask,
+			     (void *)&__cpu_active_mask,
+			     sizeof(__cpu_active_mask));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE___cpu_online_mask,
+			     (void *)&__cpu_online_mask,
+			     sizeof(__cpu_online_mask));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE___cpu_present_mask,
+			     (void *)&__cpu_present_mask,
+			     sizeof(__cpu_present_mask));
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_nr_irqs,
+			     (void *)&nr_irqs, sizeof(nr_irqs));
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_tainted_mask,
+			     (void *)&tainted_mask, sizeof(tainted_mask));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_taint_flags,
+			     (void *)&taint_flags, sizeof(taint_flags));
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_jiffies_64,
+			     (void *)&jiffies_64, sizeof(jiffies_64));
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_nr_threads,
+			     (void *)&nr_threads, sizeof(nr_threads));
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_node_states,
+			     (void *)&node_states, sizeof(node_states));
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_init_mm,
+			     (void *)&init_mm, sizeof(init_mm));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_init_mm_pgd,
+			     (void *)&init_mm.pgd, sizeof(*init_mm.pgd));
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE__totalram_pages,
+			     (void *)&_totalram_pages, sizeof(_totalram_pages));
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_nr_swapfiles,
+			     (void *)&nr_swapfiles, sizeof(nr_swapfiles));
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE___per_cpu_offset,
+			     (void *)&__per_cpu_offset, sizeof(__per_cpu_offset));
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_high_memory,
+			     (void *)&high_memory, sizeof(high_memory));
+#ifdef CONFIG_NUMA
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_node_data,
+			     (void *)&node_data,
+			     MAX_NUMNODES * sizeof(struct pglist_data));
+
+	for (i = 0; i < MAX_NUMNODES; i++) {
+		if (!NODE_DATA(i))
+			continue;
+		kmemdump_register((void *)NODE_DATA(i),
+				  roundup(sizeof(pg_data_t), SMP_CACHE_BYTES));
+	}
+#endif
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_mem_section,
+			     (void *)&mem_section, sizeof(mem_section));
+	for (i = 0; i < NR_SECTION_ROOTS; i++) {
+		if (!mem_section[i])
+			continue;
+		kmemdump_register((void *)mem_section[i],
+				  SECTIONS_PER_ROOT * sizeof(struct mem_section));
+	}
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_MEMSECT,
+			     (void *)mem_section,
+			     sizeof(struct mem_section *) * NR_SECTION_ROOTS);
+
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_kallsyms_num_syms,
+			     (void *)&kallsyms_num_syms,
+			     sizeof(kallsyms_num_syms));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_kallsyms_relative_base,
+			     (void *)&kallsyms_relative_base,
+			     sizeof(kallsyms_relative_base));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_kallsyms_offsets,
+			     (void *)&kallsyms_offsets,
+			     sizeof(&kallsyms_offsets));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_kallsyms_names,
+			     (void *)&kallsyms_names,
+			     sizeof(&kallsyms_names));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_kallsyms_token_table,
+			     (void *)&kallsyms_token_table,
+			     sizeof(&kallsyms_token_table));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_kallsyms_token_index,
+			     (void *)&kallsyms_token_index,
+			     sizeof(&kallsyms_token_index));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_kallsyms_markers,
+			     (void *)&kallsyms_markers,
+			     sizeof(&kallsyms_markers));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_kallsyms_seqs_of_names,
+			     (void *)&kallsyms_seqs_of_names,
+			     sizeof(&kallsyms_seqs_of_names));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE__sinittext,
+			     (void *)&_sinittext, sizeof(&_sinittext));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE__einittext,
+			     (void *)&_einittext, sizeof(&_einittext));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE__end,
+			     (void *)&_end, sizeof(&_end));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE__text,
+			     (void *)&_text, sizeof(&_text));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE__stext,
+			     (void *)&_stext, sizeof(&_stext));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE__etext,
+			     (void *)&_etext, sizeof(&_etext));
+	kmemdump_register_id(KMEMDUMP_ID_COREIMAGE_swapper_pg_dir,
+			     (void *)&swapper_pg_dir, sizeof(&swapper_pg_dir));
 }
 
 static int __init crash_save_vmcoreinfo_init(void)
-- 
2.43.0