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x86 hibernate: Mark ACPI NVS memory region at startup

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Introduce new initcall for marking the ACPI NVS memory at startup, so
that it can be saved/restored during hibernation/resume.

Based on a patch by Zhang Rui.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Rafael J. Wysocki 2008-10-31 01:02:41 +01:00 committed by Len Brown
parent 3f4b0ef7f2
commit b69edc7653
1 changed files with 21 additions and 0 deletions
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21
arch/x86/kernel/e820.c
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@ -665,6 +665,27 @@ void __init e820_mark_nosave_regions(unsigned long limit_pfn)
}
#endif
#ifdef CONFIG_HIBERNATION
/**
* Mark ACPI NVS memory region, so that we can save/restore it during
* hibernation and the subsequent resume.
*/
static int __init e820_mark_nvs_memory(void)
{
int i;
for (i = 0; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
if (ei->type == E820_NVS)
hibernate_nvs_register(ei->addr, ei->size);
}
return 0;
}
core_initcall(e820_mark_nvs_memory);
#endif
/*
* Early reserved memory areas.
*/