On Sun, Oct 26, 2008 at 12:54 PM, Rafael J. Wysocki <rjw@xxxxxxx> wrote:
> From: Rafael J. Wysocki <rjw@xxxxxxx>
> Subject: x86 hibernate: Mark ACPI NVS memory region at startup
>
> Introduce new initcall for marking the ACPI NVS memory at startup, so
> that it can be saved/restore during hibernation/resume.
>
> Based on a patch by Zhang Rui.
>
> Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
> Cc: Zhang Rui <rui.zhang@xxxxxxxxx>
> ---
> arch/x86/kernel/e820.c | 25 +++++++++++++++++++++++++
> 1 files changed, 25 insertions(+), 0 deletions(-)
>
> diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
> index ce97bf3..e1e63a8 100644
> --- a/arch/x86/kernel/e820.c
> +++ b/arch/x86/kernel/e820.c
> @@ -20,6 +20,7 @@
> #include <linux/pfn.h>
> #include <linux/suspend.h>
> #include <linux/firmware-map.h>
> +#include <linux/efi.h>
>
> #include <asm/pgtable.h>
> #include <asm/page.h>
> @@ -665,6 +666,30 @@ 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;
> +
> + if (efi_enabled)
> + return 0;
> +
> + 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);
do you need to something to ACPI code too?
BIOS-provided physical RAM map:
> BIOS-e820: 0000000000000100 - 0000000000095800 (usable)
> BIOS-e820: 0000000000095800 - 00000000000a0000 (reserved)
> BIOS-e820: 0000000000100000 - 00000000d7fa0000 (usable)
> BIOS-e820: 00000000d7fae000 - 00000000d7fb0000 (reserved)
> BIOS-e820: 00000000d7fb0000 - 00000000d7fbe000 (ACPI data) <================ acpi code
> BIOS-e820: 00000000d7fbe000 - 00000000d7ff0000 (ACPI NVS)
> BIOS-e820: 00000000d7ff0000 - 00000000d8000000 (reserved)
> BIOS-e820: 00000000dc000000 - 00000000f0000000 (reserved)
> BIOS-e820: 00000000fec00000 - 00000000fec01000 (reserved)
> BIOS-e820: 00000000fee00000 - 00000000fee01000 (reserved)
> BIOS-e820: 00000000ff700000 - 0000000100000000 (reserved)
> BIOS-e820: 0000000100000000 - 0000004028000000 (usable)
YH
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