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kernel: fix crashlog issues on various architectures

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2016-07-28 11:59:48 +02:00
parent eb28a0cde6
commit 6b5a418512
1 changed files with 26 additions and 14 deletions
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40
target/linux/generic/patches-4.4/930-crashlog.patch
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@ -26,7 +26,7 @@
+config CRASHLOG
+ bool "Crash logging"
+ depends on (!NO_BOOTMEM || HAVE_MEMBLOCK) && !(ARM || SPARC || PPC)
+ depends on (!NO_BOOTMEM || HAVE_MEMBLOCK)
+
config BLK_DEV_INITRD
bool "Initial RAM filesystem and RAM disk (initramfs/initrd) support"
@ -43,7 +43,7 @@
--- /dev/null
+++ b/kernel/crashlog.c
@@ -0,0 +1,181 @@
@@ -0,0 +1,193 @@
+/*
+ * Crash information logger
+ * Copyright (C) 2010 Felix Fietkau <nbd@nbd.name>
@ -75,6 +75,7 @@
+#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
@ -208,10 +209,21 @@
+
+int __init crashlog_init_fs(void)
+{
+ if (!crashlog_addr)
+ return -ENOMEM;
+ struct page *pages[CRASHLOG_PAGES];
+ pgprot_t prot;
+ int i;
+
+ crashlog_buf = ioremap(crashlog_addr, CRASHLOG_SIZE);
+ 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();
+
@ -265,12 +277,12 @@
#include <asm-generic/sections.h>
#include <linux/io.h>
@@ -503,6 +504,8 @@ static void __init_memblock memblock_ins
memblock_set_region_node(rgn, nid);
type->cnt++;
type->total_size += size;
+ if (type == &memblock.memory && idx == 0)
+ crashlog_init_memblock(base, size);
}
/**
@@ -541,6 +542,8 @@ 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: