AcoSail/kernel_optimize_test
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sh: convert kexec crash kernel management to LMB.

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This migrates the crash kernel handling off of bootmem and over to LMB.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt 2010-05-07 14:54:55 +09:00
parent 9b7a37853a
commit a5ec395071
3 changed files with 58 additions and 44 deletions
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8
arch/sh/include/asm/kexec.h
View File

@ -26,6 +26,10 @@
/* The native architecture */
#define KEXEC_ARCH KEXEC_ARCH_SH
#ifdef CONFIG_KEXEC
/* arch/sh/kernel/machine_kexec.c */
void reserve_crashkernel(void);
static inline void crash_setup_regs(struct pt_regs *newregs,
struct pt_regs *oldregs)
{
@ -59,4 +63,8 @@ static inline void crash_setup_regs(struct pt_regs *newregs,
newregs->pc = (unsigned long)current_text_addr();
}
}
#else
static inline void reserve_crashkernel(void) { }
#endif /* CONFIG_KEXEC */
#endif /* __ASM_SH_KEXEC_H */

51
arch/sh/kernel/machine_kexec.c
View File

@ -8,7 +8,6 @@
* This source code is licensed under the GNU General Public License,
* Version 2. See the file COPYING for more details.
*/
#include <linux/mm.h>
#include <linux/kexec.h>
#include <linux/delay.h>
@ -16,6 +15,7 @@
#include <linux/numa.h>
#include <linux/ftrace.h>
#include <linux/suspend.h>
#include <linux/lmb.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/mmu_context.h>
@ -148,3 +148,52 @@ void arch_crash_save_vmcoreinfo(void)
VMCOREINFO_LENGTH(node_data, MAX_NUMNODES);
#endif
}
void __init reserve_crashkernel(void)
{
unsigned long long crash_size, crash_base;
int ret;
/* this is necessary because of lmb_phys_mem_size() */
lmb_analyze();
ret = parse_crashkernel(boot_command_line, lmb_phys_mem_size(),
&crash_size, &crash_base);
if (ret == 0 && crash_size > 0) {
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
}
if (crashk_res.end == crashk_res.start)
goto disable;
crash_size = PAGE_ALIGN(crashk_res.end - crashk_res.start + 1);
if (!crashk_res.start) {
crashk_res.start = lmb_alloc(crash_size, PAGE_SIZE);
if (!crashk_res.start) {
pr_err("crashkernel allocation failed\n");
goto disable;
}
} else {
ret = lmb_reserve(crashk_res.start, crash_size);
if (unlikely(ret < 0)) {
pr_err("crashkernel reservation failed - "
"memory is in use\n");
goto disable;
}
}
pr_info("Reserving %ldMB of memory at %ldMB "
"for crashkernel (System RAM: %ldMB)\n",
(unsigned long)(crash_size >> 20),
(unsigned long)(crashk_res.start >> 20),
(unsigned long)(lmb_phys_mem_size() >> 20));
crashk_res.end = crashk_res.start + crash_size - 1;
insert_resource(&iomem_resource, &crashk_res);
return;
disable:
crashk_res.start = crashk_res.end = 0;
}

43
arch/sh/kernel/setup.c
View File

@ -145,49 +145,6 @@ static void __init register_bootmem_low_pages(void)
free_bootmem(PFN_PHYS(curr_pfn), PFN_PHYS(pages));
}
#ifdef CONFIG_KEXEC
static void __init reserve_crashkernel(void)
{
unsigned long long free_mem;
unsigned long long crash_size, crash_base;
void *vp;
int ret;
free_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
ret = parse_crashkernel(boot_command_line, free_mem,
&crash_size, &crash_base);
if (ret == 0 && crash_size) {
if (crash_base <= 0) {
vp = alloc_bootmem_nopanic(crash_size);
if (!vp) {
printk(KERN_INFO "crashkernel allocation "
"failed\n");
return;
}
crash_base = __pa(vp);
} else if (reserve_bootmem(crash_base, crash_size,
BOOTMEM_EXCLUSIVE) < 0) {
printk(KERN_INFO "crashkernel reservation failed - "
"memory is in use\n");
return;
}
printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
"for crashkernel (System RAM: %ldMB)\n",
(unsigned long)(crash_size >> 20),
(unsigned long)(crash_base >> 20),
(unsigned long)(free_mem >> 20));
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
insert_resource(&iomem_resource, &crashk_res);
}
}
#else
static inline void __init reserve_crashkernel(void)
{}
#endif
static void __init check_for_initrd(void)
{
#ifdef CONFIG_BLK_DEV_INITRD