aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/generic/hack-4.14/930-crashlog.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/generic/hack-4.14/930-crashlog.patch')
-rw-r--r--target/linux/generic/hack-4.14/930-crashlog.patch338
1 files changed, 0 insertions, 338 deletions
diff --git a/target/linux/generic/hack-4.14/930-crashlog.patch b/target/linux/generic/hack-4.14/930-crashlog.patch
deleted file mode 100644
index 9d09dbd760..0000000000
--- a/target/linux/generic/hack-4.14/930-crashlog.patch
+++ /dev/null
@@ -1,338 +0,0 @@
-From 6b1ab74a9917012d0c559edc4ed299d9228ac89f Mon Sep 17 00:00:00 2001
-From: Felix Fietkau <nbd@nbd.name>
-Date: Sat, 8 Jul 2017 08:26:47 +0200
-Subject: kernel: add the new 'crashlog' feature
-
-this tries to store kernel oops/panic logs in a fixed location in RAM to
-recover them available to user space using debugfs
-
-Signed-off-by: Felix Fietkau <nbd@nbd.name>
----
- include/linux/crashlog.h | 17 ++++
- init/Kconfig | 4 +
- kernel/Makefile | 1 +
- kernel/crashlog.c | 213 +++++++++++++++++++++++++++++++++++++++++++++++
- kernel/module.c | 3 +
- mm/bootmem.c | 2 +
- mm/memblock.c | 5 ++
- 7 files changed, 245 insertions(+)
- create mode 100644 include/linux/crashlog.h
- create mode 100644 kernel/crashlog.c
-
---- /dev/null
-+++ b/include/linux/crashlog.h
-@@ -0,0 +1,17 @@
-+#ifndef __CRASHLOG_H
-+#define __CRASHLOG_H
-+
-+#ifdef CONFIG_CRASHLOG
-+void crashlog_init_bootmem(struct bootmem_data *bdata);
-+void crashlog_init_memblock(phys_addr_t addr, phys_addr_t size);
-+#else
-+static inline void crashlog_init_bootmem(struct bootmem_data *bdata)
-+{
-+}
-+
-+static inline void crashlog_init_memblock(phys_addr_t addr, phys_addr_t size)
-+{
-+}
-+#endif
-+
-+#endif
---- a/init/Kconfig
-+++ b/init/Kconfig
-@@ -1009,6 +1009,10 @@ config RELAY
-
- If unsure, say N.
-
-+config CRASHLOG
-+ bool "Crash logging"
-+ depends on (!NO_BOOTMEM || HAVE_MEMBLOCK)
-+
- config BLK_DEV_INITRD
- bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support"
- depends on BROKEN || !FRV
---- a/kernel/Makefile
-+++ b/kernel/Makefile
-@@ -110,6 +110,7 @@ obj-$(CONFIG_CONTEXT_TRACKING) += contex
- obj-$(CONFIG_TORTURE_TEST) += torture.o
-
- obj-$(CONFIG_HAS_IOMEM) += memremap.o
-+obj-$(CONFIG_CRASHLOG) += crashlog.o
-
- $(obj)/configs.o: $(obj)/config_data.h
-
---- /dev/null
-+++ b/kernel/crashlog.c
-@@ -0,0 +1,213 @@
-+/*
-+ * Crash information logger
-+ * Copyright (C) 2010 Felix Fietkau <nbd@nbd.name>
-+ *
-+ * Based on ramoops.c
-+ * Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com>
-+ *
-+ * This program is free software; you can redistribute it and/or
-+ * modify it under the terms of the GNU General Public License
-+ * version 2 as published by the Free Software Foundation.
-+ *
-+ * This program is distributed in the hope that it will be useful, but
-+ * WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-+ * General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
-+ * 02110-1301 USA
-+ *
-+ */
-+
-+#include <linux/module.h>
-+#include <linux/bootmem.h>
-+#include <linux/memblock.h>
-+#include <linux/debugfs.h>
-+#include <linux/crashlog.h>
-+#include <linux/kmsg_dump.h>
-+#include <linux/module.h>
-+#include <linux/pfn.h>
-+#include <linux/vmalloc.h>
-+#include <asm/io.h>
-+
-+#define CRASHLOG_PAGES 4
-+#define CRASHLOG_SIZE (CRASHLOG_PAGES * PAGE_SIZE)
-+#define CRASHLOG_MAGIC 0xa1eedead
-+
-+/*
-+ * Start the log at 1M before the end of RAM, as some boot loaders like
-+ * to use the end of the RAM for stack usage and other things
-+ * If this fails, fall back to using the last part.
-+ */
-+#define CRASHLOG_OFFSET (1024 * 1024)
-+
-+struct crashlog_data {
-+ u32 magic;
-+ u32 len;
-+ u8 data[];
-+};
-+
-+static struct debugfs_blob_wrapper crashlog_blob;
-+static unsigned long crashlog_addr = 0;
-+static struct crashlog_data *crashlog_buf;
-+static struct kmsg_dumper dump;
-+static bool first = true;
-+
-+extern struct list_head *crashlog_modules;
-+
-+static bool crashlog_set_addr(phys_addr_t addr, phys_addr_t size)
-+{
-+ /* Limit to lower 64 MB to avoid highmem */
-+ phys_addr_t limit = 64 * 1024 * 1024;
-+
-+ if (crashlog_addr)
-+ return false;
-+
-+ if (addr > limit)
-+ return false;
-+
-+ if (addr + size > limit)
-+ size = limit - addr;
-+
-+ crashlog_addr = addr;
-+
-+ if (addr + size > CRASHLOG_OFFSET)
-+ crashlog_addr += size - CRASHLOG_OFFSET;
-+
-+ return true;
-+}
-+
-+#ifndef CONFIG_NO_BOOTMEM
-+void __init crashlog_init_bootmem(bootmem_data_t *bdata)
-+{
-+ phys_addr_t start, end;
-+
-+ start = PFN_PHYS(bdata->node_low_pfn);
-+ end = PFN_PHYS(bdata->node_min_pfn);
-+ if (!crashlog_set_addr(start, end - start))
-+ return;
-+
-+ if (reserve_bootmem(crashlog_addr, CRASHLOG_SIZE, BOOTMEM_EXCLUSIVE) < 0) {
-+ printk("Crashlog failed to allocate RAM at address 0x%lx\n",
-+ crashlog_addr);
-+ crashlog_addr = 0;
-+ }
-+}
-+#endif
-+
-+#ifdef CONFIG_HAVE_MEMBLOCK
-+void __init_memblock crashlog_init_memblock(phys_addr_t addr, phys_addr_t size)
-+{
-+ if (!crashlog_set_addr(addr, size))
-+ return;
-+
-+ if (memblock_reserve(crashlog_addr, CRASHLOG_SIZE)) {
-+ printk("Crashlog failed to allocate RAM at address 0x%lx\n",
-+ crashlog_addr);
-+ crashlog_addr = 0;
-+ }
-+}
-+#endif
-+
-+static void __init crashlog_copy(void)
-+{
-+ if (crashlog_buf->magic != CRASHLOG_MAGIC)
-+ return;
-+
-+ if (!crashlog_buf->len || crashlog_buf->len >
-+ CRASHLOG_SIZE - sizeof(*crashlog_buf))
-+ return;
-+
-+ crashlog_blob.size = crashlog_buf->len;
-+ crashlog_blob.data = kmemdup(crashlog_buf->data,
-+ crashlog_buf->len, GFP_KERNEL);
-+
-+ debugfs_create_blob("crashlog", 0700, NULL, &crashlog_blob);
-+}
-+
-+static int get_maxlen(void)
-+{
-+ return CRASHLOG_SIZE - sizeof(*crashlog_buf) - crashlog_buf->len;
-+}
-+
-+static void crashlog_printf(const char *fmt, ...)
-+{
-+ va_list args;
-+ int len = get_maxlen();
-+
-+ if (!len)
-+ return;
-+
-+ va_start(args, fmt);
-+ crashlog_buf->len += vscnprintf(
-+ &crashlog_buf->data[crashlog_buf->len],
-+ len, fmt, args);
-+ va_end(args);
-+}
-+
-+static void crashlog_do_dump(struct kmsg_dumper *dumper,
-+ enum kmsg_dump_reason reason)
-+{
-+ struct timeval tv;
-+ struct module *m;
-+ char *buf;
-+ size_t len;
-+
-+ if (!first)
-+ crashlog_printf("\n===================================\n");
-+
-+ do_gettimeofday(&tv);
-+ crashlog_printf("Time: %lu.%lu\n",
-+ (long)tv.tv_sec, (long)tv.tv_usec);
-+
-+ if (first) {
-+ crashlog_printf("Modules:");
-+ list_for_each_entry(m, crashlog_modules, list) {
-+ crashlog_printf("\t%s@%p+%x", m->name,
-+ m->core_layout.base, m->core_layout.size,
-+ m->init_layout.base, m->init_layout.size);
-+ }
-+ crashlog_printf("\n");
-+ first = false;
-+ }
-+
-+ buf = (char *)&crashlog_buf->data[crashlog_buf->len];
-+
-+ kmsg_dump_get_buffer(dumper, true, buf, get_maxlen(), &len);
-+
-+ crashlog_buf->len += len;
-+}
-+
-+
-+int __init crashlog_init_fs(void)
-+{
-+ struct page *pages[CRASHLOG_PAGES];
-+ pgprot_t prot;
-+ int i;
-+
-+ if (!crashlog_addr) {
-+ printk("No memory allocated for crashlog\n");
-+ return -ENOMEM;
-+ }
-+
-+ printk("Crashlog allocated RAM at address 0x%lx\n", (unsigned long) crashlog_addr);
-+ for (i = 0; i < CRASHLOG_PAGES; i++)
-+ pages[i] = pfn_to_page((crashlog_addr >> PAGE_SHIFT) + i);
-+
-+ prot = pgprot_writecombine(PAGE_KERNEL);
-+ crashlog_buf = vmap(pages, CRASHLOG_PAGES, VM_MAP, prot);
-+
-+ crashlog_copy();
-+
-+ crashlog_buf->magic = CRASHLOG_MAGIC;
-+ crashlog_buf->len = 0;
-+
-+ dump.max_reason = KMSG_DUMP_OOPS;
-+ dump.dump = crashlog_do_dump;
-+ kmsg_dump_register(&dump);
-+
-+ return 0;
-+}
-+module_init(crashlog_init_fs);
---- a/kernel/module.c
-+++ b/kernel/module.c
-@@ -256,6 +256,9 @@ static void mod_update_bounds(struct mod
- #ifdef CONFIG_KGDB_KDB
- struct list_head *kdb_modules = &modules; /* kdb needs the list of modules */
- #endif /* CONFIG_KGDB_KDB */
-+#ifdef CONFIG_CRASHLOG
-+struct list_head *crashlog_modules = &modules;
-+#endif
-
- static void module_assert_mutex(void)
- {
---- a/mm/bootmem.c
-+++ b/mm/bootmem.c
-@@ -15,6 +15,7 @@
- #include <linux/export.h>
- #include <linux/kmemleak.h>
- #include <linux/range.h>
-+#include <linux/crashlog.h>
- #include <linux/bug.h>
- #include <linux/io.h>
- #include <linux/bootmem.h>
-@@ -175,6 +176,7 @@ static unsigned long __init free_all_boo
- if (!bdata->node_bootmem_map)
- return 0;
-
-+ crashlog_init_bootmem(bdata);
- map = bdata->node_bootmem_map;
- start = bdata->node_min_pfn;
- end = bdata->node_low_pfn;
---- a/mm/memblock.c
-+++ b/mm/memblock.c
-@@ -19,6 +19,7 @@
- #include <linux/debugfs.h>
- #include <linux/seq_file.h>
- #include <linux/memblock.h>
-+#include <linux/crashlog.h>
-
- #include <asm/sections.h>
- #include <linux/io.h>
-@@ -483,6 +484,8 @@ static void __init_memblock memblock_ins
- memblock_set_region_node(rgn, nid);
- type->cnt++;
- type->total_size += size;
-+ if (type == &memblock.memory)
-+ crashlog_init_memblock(base, size);
- }
-
- /**
-@@ -522,6 +525,8 @@ int __init_memblock memblock_add_range(s
- type->regions[0].flags = flags;
- memblock_set_region_node(&type->regions[0], nid);
- type->total_size = size;
-+ if (type == &memblock.memory)
-+ crashlog_init_memblock(base, size);
- return 0;
- }
- repeat:
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 00:21:25 +0000