diff options
| author | Michael Holzheu <holzheu@linux.vnet.ibm.com> | 2011-10-30 15:16:40 +0100 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2011-10-30 15:16:42 +0100 |
| commit | 60a0c68df2632feaa4a986af084650d1165d89c5 (patch) | |
| tree | f55907defeab43de02a5a3127c8d5a694a21b3a2 /arch/s390/kernel/smp.c | |
| parent | 7f0bf656c66e4292e965c95fd9de55c72b6578bb (diff) | |
[S390] kdump backend code
This patch provides the architecture specific part of the s390 kdump
support.
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index e4572601e91..e3f51dfa5ca 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -38,6 +38,7 @@ #include <linux/timex.h> #include <linux/bootmem.h> #include <linux/slab.h> +#include <linux/crash_dump.h> #include <asm/asm-offsets.h> #include <asm/ipl.h> #include <asm/setup.h> @@ -304,11 +305,13 @@ void smp_ctl_clear_bit(int cr, int bit) } EXPORT_SYMBOL(smp_ctl_clear_bit); -#ifdef CONFIG_ZFCPDUMP +#if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_CRASH_DUMP) static void __init smp_get_save_area(unsigned int cpu, unsigned int phy_cpu) { - if (ipl_info.type != IPL_TYPE_FCP_DUMP) + if (ipl_info.type != IPL_TYPE_FCP_DUMP && !OLDMEM_BASE) + return; + if (is_kdump_kernel()) return; if (cpu >= NR_CPUS) { pr_warning("CPU %i exceeds the maximum %i and is excluded from " @@ -426,6 +429,18 @@ static void __init smp_detect_cpus(void) info = kmalloc(sizeof(*info), GFP_KERNEL); if (!info) panic("smp_detect_cpus failed to allocate memory\n"); +#ifdef CONFIG_CRASH_DUMP + if (OLDMEM_BASE && !is_kdump_kernel()) { + struct save_area *save_area; + + save_area = kmalloc(sizeof(*save_area), GFP_KERNEL); + if (!save_area) + panic("could not allocate memory for save area\n"); + copy_oldmem_page(1, (void *) save_area, sizeof(*save_area), + 0x200, 0); + zfcpdump_save_areas[0] = save_area; + } +#endif /* Use sigp detection algorithm if sclp doesn't work. */ if (sclp_get_cpu_info(info)) { smp_use_sigp_detection = 1; |