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x86: unify crashkernel reservation for 32 and 64 bit 

This patch moves the reserve_crashkernel() to setup.c and removes the
architecture-specific version. Both versions were more or less the same.

I tested it on both x86-64 and i386, with CONFIG_KEXEC on and off (so
that it compiles).

Signed-off-by: Bernhard Walle <bwalle@suse.de>
Cc: yhlu.kernel@gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Bernhard Walle 2008-06-20 15:38:22 +02:00 committed by Ingo Molnar
parent 6236af82d8
commit 1ecd27657b
4 changed files with 64 additions and 93 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

61
arch/x86/kernel/setup.c
View File

@ -3,6 +3,7 @@
#include <linux/init.h>
#include <linux/bootmem.h>
#include <linux/percpu.h>
#include <linux/kexec.h>
#include <asm/smp.h>
#include <asm/percpu.h>
#include <asm/sections.h>
@ -11,6 +12,7 @@
#include <asm/topology.h>
#include <asm/mpspec.h>
#include <asm/apicdef.h>
#include <asm/highmem.h>
#ifdef CONFIG_X86_LOCAL_APIC
unsigned int num_processors;
@ -404,3 +406,62 @@ EXPORT_SYMBOL(node_to_cpumask);
#endif /* CONFIG_DEBUG_PER_CPU_MAPS */
#endif /* X86_64_NUMA */
/*
* --------- Crashkernel reservation ------------------------------
*/
static inline unsigned long long get_total_mem(void)
{
unsigned long long total;
total = max_low_pfn - min_low_pfn;
#ifdef CONFIG_HIGHMEM
total += highend_pfn - highstart_pfn;
#endif
return total << PAGE_SHIFT;
}
#ifdef CONFIG_KEXEC
void __init reserve_crashkernel(void)
{
unsigned long long total_mem;
unsigned long long crash_size, crash_base;
int ret;
total_mem = get_total_mem();
ret = parse_crashkernel(boot_command_line, total_mem,
&crash_size, &crash_base);
if (ret == 0 && crash_size > 0) {
if (crash_base <= 0) {
printk(KERN_INFO "crashkernel reservation failed - "
"you have to specify a base address\n");
return;
}
if (reserve_bootmem_generic(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)(total_mem >> 20));
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
insert_resource(&iomem_resource, &crashk_res);
}
}
#else
void __init reserve_crashkernel(void)
{}
#endif

53
arch/x86/kernel/setup_32.c
View File

@ -429,59 +429,6 @@ extern unsigned long __init setup_memory(void);
extern void zone_sizes_init(void);
#endif /* !CONFIG_NEED_MULTIPLE_NODES */
static inline unsigned long long get_total_mem(void)
{
unsigned long long total;
total = max_low_pfn - min_low_pfn;
#ifdef CONFIG_HIGHMEM
total += highend_pfn - highstart_pfn;
#endif
return total << PAGE_SHIFT;
}
#ifdef CONFIG_KEXEC
static void __init reserve_crashkernel(void)
{
unsigned long long total_mem;
unsigned long long crash_size, crash_base;
int ret;
total_mem = get_total_mem();
ret = parse_crashkernel(boot_command_line, total_mem,
&crash_size, &crash_base);
if (ret == 0 && crash_size > 0) {
if (crash_base <= 0) {
printk(KERN_INFO "crashkernel reservation failed - "
"you have to specify a base address\n");
return;
}
if (reserve_bootmem_generic(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)(total_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
#ifdef CONFIG_BLK_DEV_INITRD
static bool do_relocate_initrd = false;

40
arch/x86/kernel/setup_64.c
View File

@ -228,46 +228,6 @@ static inline void copy_edd(void)
}
#endif
#ifdef CONFIG_KEXEC
static void __init reserve_crashkernel(void)
{
unsigned long long total_mem;
unsigned long long crash_size, crash_base;
int ret;
total_mem = ((unsigned long long)max_low_pfn - min_low_pfn) << PAGE_SHIFT;
ret = parse_crashkernel(boot_command_line, total_mem,
&crash_size, &crash_base);
if (ret == 0 && crash_size) {
if (crash_base <= 0) {
printk(KERN_INFO "crashkernel reservation failed - "
"you have to specify a base address\n");
return;
}
if (reserve_bootmem_generic(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)(total_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
/*
* setup_arch - architecture-specific boot-time initializations
*

3
include/asm-x86/setup.h
View File

@ -8,6 +8,9 @@
/* Interrupt control for vSMPowered x86_64 systems */
void vsmp_init(void);
/* Crashkernel reservation */
void reserve_crashkernel(void);
#ifndef CONFIG_PARAVIRT
#define paravirt_post_allocator_init() do {} while (0)
#endif