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Use extended crashkernel command line on ia64 

This patch adapts IA64 to use the generic parse_crashkernel() function instead
of its own parsing for the crashkernel command line.

Because the total amount of System RAM must be known when calling this
function, efi_memmap_init() is modified to return its accumulated total_memory
variable.

Also, the crashkernel handling is moved in an own function in
arch/ia64/kernel/setup.c to make the code more readable.

[kamalesh@linux.vnet.ibm.com: build fix]
Signed-off-by: Bernhard Walle <bwalle@suse.de>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Bernhard Walle 2007-10-18 23:41:00 -07:00 committed by Linus Torvalds
parent 5c3391f9f7
commit cb3808532e
3 changed files with 50 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/ia64/kernel/efi.c
View File

@ -967,7 +967,7 @@ find_memmap_space (void)
* to use. We can allocate partial granules only if the unavailable
* parts exist, and are WB.
*/
void
unsigned long
efi_memmap_init(unsigned long *s, unsigned long *e)
{
struct kern_memdesc *k, *prev = NULL;
@ -1084,6 +1084,8 @@ efi_memmap_init(unsigned long *s, unsigned long *e)
/* reserve the memory we are using for kern_memmap */
*s = (u64)kern_memmap;
*e = (u64)++k;
return total_mem;
}
void

88
arch/ia64/kernel/setup.c
View File

@ -208,6 +208,48 @@ static int __init register_memory(void)
__initcall(register_memory);
#ifdef CONFIG_KEXEC
static void __init setup_crashkernel(unsigned long total, int *n)
{
unsigned long long base = 0, size = 0;
int ret;
ret = parse_crashkernel(boot_command_line, total,
&size, &base);
if (ret == 0 && size > 0) {
if (!base) {
sort_regions(rsvd_region, *n);
base = kdump_find_rsvd_region(size,
rsvd_region, *n);
}
if (base != ~0UL) {
printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
"for crashkernel (System RAM: %ldMB)\n",
(unsigned long)(size >> 20),
(unsigned long)(base >> 20),
(unsigned long)(total >> 20));
rsvd_region[*n].start =
(unsigned long)__va(base);
rsvd_region[*n].end =
(unsigned long)__va(base + size);
(*n)++;
crashk_res.start = base;
crashk_res.end = base + size - 1;
}
}
efi_memmap_res.start = ia64_boot_param->efi_memmap;
efi_memmap_res.end = efi_memmap_res.start +
ia64_boot_param->efi_memmap_size;
boot_param_res.start = __pa(ia64_boot_param);
boot_param_res.end = boot_param_res.start +
sizeof(*ia64_boot_param);
}
#else
static inline void __init setup_crashkernel(unsigned long total, int *n)
{}
#endif
/**
* reserve_memory - setup reserved memory areas
*
@ -219,6 +261,7 @@ void __init
reserve_memory (void)
{
int n = 0;
unsigned long total_memory;
/*
* none of the entries in this table overlap
@ -254,50 +297,11 @@ reserve_memory (void)
n++;
#endif
efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
total_memory = efi_memmap_init(&rsvd_region[n].start, &rsvd_region[n].end);
n++;
#ifdef CONFIG_KEXEC
/* crashkernel=size@offset specifies the size to reserve for a crash
* kernel. If offset is 0, then it is determined automatically.
* By reserving this memory we guarantee that linux never set's it
* up as a DMA target.Useful for holding code to do something
* appropriate after a kernel panic.
*/
{
char *from = strstr(boot_command_line, "crashkernel=");
unsigned long base, size;
if (from) {
size = memparse(from + 12, &from);
if (*from == '@')
base = memparse(from+1, &from);
else
base = 0;
if (size) {
if (!base) {
sort_regions(rsvd_region, n);
base = kdump_find_rsvd_region(size,
rsvd_region, n);
}
if (base != ~0UL) {
rsvd_region[n].start =
(unsigned long)__va(base);
rsvd_region[n].end =
(unsigned long)__va(base + size);
n++;
crashk_res.start = base;
crashk_res.end = base + size - 1;
}
}
}
efi_memmap_res.start = ia64_boot_param->efi_memmap;
efi_memmap_res.end = efi_memmap_res.start +
ia64_boot_param->efi_memmap_size;
boot_param_res.start = __pa(ia64_boot_param);
boot_param_res.end = boot_param_res.start +
sizeof(*ia64_boot_param);
}
#endif
setup_crashkernel(total_memory, &n);
/* end of memory marker */
rsvd_region[n].start = ~0UL;
rsvd_region[n].end = ~0UL;

2
include/asm-ia64/meminit.h
View File

@ -35,7 +35,7 @@ extern void find_memory (void);
extern void reserve_memory (void);
extern void find_initrd (void);
extern int filter_rsvd_memory (unsigned long start, unsigned long end, void *arg);
extern void efi_memmap_init(unsigned long *, unsigned long *);
extern unsigned long efi_memmap_init(unsigned long *s, unsigned long *e);
extern int find_max_min_low_pfn (unsigned long , unsigned long, void *);
extern unsigned long vmcore_find_descriptor_size(unsigned long address);