|
 |
f4cf83 |
From 2572b8d702e452624bdb8d7b7c39f458e7dcf2ce Mon Sep 17 00:00:00 2001
|
|
|
f4cf83 |
From: AKASHI Takahiro <takahiro.akashi@linaro.org>
|
|
|
f4cf83 |
Date: Wed, 18 Dec 2019 11:42:32 -0500
|
|
|
f4cf83 |
Subject: [PATCH 3/3] arm64: kdump: deal with a lot of resource entries in
|
|
|
f4cf83 |
/proc/iomem
|
|
|
f4cf83 |
|
|
|
f4cf83 |
As described in the commit ("arm64: kexec: allocate memory space avoiding
|
|
|
f4cf83 |
reserved regions"), /proc/iomem now has a lot of "reserved" entries, and
|
|
|
f4cf83 |
it's not just enough to have a fixed size of memory range array.
|
|
|
f4cf83 |
|
|
|
f4cf83 |
With this patch, kdump is allowed to handle arbitrary number of memory
|
|
|
f4cf83 |
ranges, using mem_regions_alloc_and_xxx() functions.
|
|
|
f4cf83 |
|
|
|
f4cf83 |
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
|
|
|
f4cf83 |
Tested-by: Bhupesh Sharma <bhsharma@redhat.com>
|
|
|
f4cf83 |
Tested-by: Masayoshi Mizuma <m.mizuma@jp.fujitsu.com>
|
|
|
f4cf83 |
Signed-off-by: Simon Horman <horms@verge.net.au>
|
|
|
f4cf83 |
---
|
|
|
f4cf83 |
kexec/arch/arm64/crashdump-arm64.c | 25 ++++++++++---------------
|
|
|
f4cf83 |
1 file changed, 10 insertions(+), 15 deletions(-)
|
|
|
f4cf83 |
|
|
|
f4cf83 |
diff --git a/kexec/arch/arm64/crashdump-arm64.c b/kexec/arch/arm64/crashdump-arm64.c
|
|
|
f4cf83 |
index 4fd7aa8fd43c..38d1a0f3000d 100644
|
|
|
f4cf83 |
--- a/kexec/arch/arm64/crashdump-arm64.c
|
|
|
f4cf83 |
+++ b/kexec/arch/arm64/crashdump-arm64.c
|
|
|
f4cf83 |
@@ -23,13 +23,8 @@
|
|
|
f4cf83 |
#include "kexec-elf.h"
|
|
|
f4cf83 |
#include "mem_regions.h"
|
|
|
f4cf83 |
|
|
|
f4cf83 |
-/* memory ranges on crashed kernel */
|
|
|
f4cf83 |
-static struct memory_range system_memory_ranges[CRASH_MAX_MEMORY_RANGES];
|
|
|
f4cf83 |
-static struct memory_ranges system_memory_rgns = {
|
|
|
f4cf83 |
- .size = 0,
|
|
|
f4cf83 |
- .max_size = CRASH_MAX_MEMORY_RANGES,
|
|
|
f4cf83 |
- .ranges = system_memory_ranges,
|
|
|
f4cf83 |
-};
|
|
|
f4cf83 |
+/* memory ranges of crashed kernel */
|
|
|
f4cf83 |
+static struct memory_ranges system_memory_rgns;
|
|
|
f4cf83 |
|
|
|
f4cf83 |
/* memory range reserved for crashkernel */
|
|
|
f4cf83 |
struct memory_range crash_reserved_mem;
|
|
|
f4cf83 |
@@ -82,7 +77,7 @@ static uint64_t get_kernel_page_offset(void)
|
|
|
f4cf83 |
*
|
|
|
f4cf83 |
* This function is called once for each memory region found in /proc/iomem.
|
|
|
f4cf83 |
* It locates system RAM and crashkernel reserved memory and places these to
|
|
|
f4cf83 |
- * variables, respectively, system_memory_ranges and crash_reserved_mem.
|
|
|
f4cf83 |
+ * variables, respectively, system_memory_rgns and usablemem_rgns.
|
|
|
f4cf83 |
*/
|
|
|
f4cf83 |
|
|
|
f4cf83 |
static int iomem_range_callback(void *UNUSED(data), int UNUSED(nr),
|
|
|
f4cf83 |
@@ -90,11 +85,11 @@ static int iomem_range_callback(void *UNUSED(data), int UNUSED(nr),
|
|
|
f4cf83 |
unsigned long long length)
|
|
|
f4cf83 |
{
|
|
|
f4cf83 |
if (strncmp(str, CRASH_KERNEL, strlen(CRASH_KERNEL)) == 0)
|
|
|
f4cf83 |
- return mem_regions_add(&usablemem_rgns,
|
|
|
f4cf83 |
- base, length, RANGE_RAM);
|
|
|
f4cf83 |
+ return mem_regions_alloc_and_add(&usablemem_rgns,
|
|
|
f4cf83 |
+ base, length, RANGE_RAM);
|
|
|
f4cf83 |
else if (strncmp(str, SYSTEM_RAM, strlen(SYSTEM_RAM)) == 0)
|
|
|
f4cf83 |
- return mem_regions_add(&system_memory_rgns,
|
|
|
f4cf83 |
- base, length, RANGE_RAM);
|
|
|
f4cf83 |
+ return mem_regions_alloc_and_add(&system_memory_rgns,
|
|
|
f4cf83 |
+ base, length, RANGE_RAM);
|
|
|
f4cf83 |
else if (strncmp(str, KERNEL_CODE, strlen(KERNEL_CODE)) == 0)
|
|
|
f4cf83 |
elf_info.kern_paddr_start = base;
|
|
|
f4cf83 |
else if (strncmp(str, KERNEL_DATA, strlen(KERNEL_DATA)) == 0)
|
|
|
f4cf83 |
@@ -135,9 +130,9 @@ static int crash_get_memory_ranges(void)
|
|
|
f4cf83 |
|
|
|
f4cf83 |
dbgprint_mem_range("Reserved memory range", &crash_reserved_mem, 1);
|
|
|
f4cf83 |
|
|
|
f4cf83 |
- if (mem_regions_exclude(&system_memory_rgns, &crash_reserved_mem)) {
|
|
|
f4cf83 |
- fprintf(stderr,
|
|
|
f4cf83 |
- "Error: Number of crash memory ranges excedeed the max limit\n");
|
|
|
f4cf83 |
+ if (mem_regions_alloc_and_exclude(&system_memory_rgns,
|
|
|
f4cf83 |
+ &crash_reserved_mem)) {
|
|
|
f4cf83 |
+ fprintf(stderr, "Cannot allocate memory for ranges\n");
|
|
|
f4cf83 |
return -ENOMEM;
|
|
|
f4cf83 |
}
|
|
|
f4cf83 |
|
|
|
f4cf83 |
--
|
|
|
f4cf83 |
2.7.4
|
|
|
f4cf83 |
|