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Diffstat (limited to 'arch/s390/kernel/machine_kexec.c')
-rw-r--r--arch/s390/kernel/machine_kexec.c28
1 files changed, 18 insertions, 10 deletions
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index 2f1b7217c..0e64f08d3 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -43,13 +43,13 @@ static int machine_kdump_pm_cb(struct notifier_block *nb, unsigned long action,
switch (action) {
case PM_SUSPEND_PREPARE:
case PM_HIBERNATION_PREPARE:
- if (crashk_res.start)
- crash_map_reserved_pages();
+ if (kexec_crash_image)
+ arch_kexec_unprotect_crashkres();
break;
case PM_POST_SUSPEND:
case PM_POST_HIBERNATION:
- if (crashk_res.start)
- crash_unmap_reserved_pages();
+ if (kexec_crash_image)
+ arch_kexec_protect_crashkres();
break;
default:
return NOTIFY_DONE;
@@ -60,6 +60,8 @@ static int machine_kdump_pm_cb(struct notifier_block *nb, unsigned long action,
static int __init machine_kdump_pm_init(void)
{
pm_notifier(machine_kdump_pm_cb, 0);
+ /* Create initial mapping for crashkernel memory */
+ arch_kexec_unprotect_crashkres();
return 0;
}
arch_initcall(machine_kdump_pm_init);
@@ -146,6 +148,8 @@ static int kdump_csum_valid(struct kimage *image)
#endif
}
+#ifdef CONFIG_CRASH_DUMP
+
/*
* Map or unmap crashkernel memory
*/
@@ -167,21 +171,25 @@ static void crash_map_pages(int enable)
}
/*
- * Map crashkernel memory
+ * Unmap crashkernel memory
*/
-void crash_map_reserved_pages(void)
+void arch_kexec_protect_crashkres(void)
{
- crash_map_pages(1);
+ if (crashk_res.end)
+ crash_map_pages(0);
}
/*
- * Unmap crashkernel memory
+ * Map crashkernel memory
*/
-void crash_unmap_reserved_pages(void)
+void arch_kexec_unprotect_crashkres(void)
{
- crash_map_pages(0);
+ if (crashk_res.end)
+ crash_map_pages(1);
}
+#endif
+
/*
* Give back memory to hypervisor before new kdump is loaded
*/