[PATCH 3/4] x86 hibernate: Mark ACPI NVS memory region at startup (rev. 2)

["Rafael J. Wysocki" <rjw@xxxxxxx>]

Hi Len,

Please replace this patch with the appended one.

I have verified that we are supposed to save/restore the NVS area in the EFI
case too.

Thanks,
Rafael


On Sunday, 26 of October 2008, Rafael J. Wysocki 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);
> +	}
> +
> +	return 0;
> +}
> +core_initcall(e820_mark_nvs_memory);
> +#endif
> +
>  /*
>   * Early reserved memory areas.
>   */

---
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/restored during hibernation/resume.

Based on a patch by Zhang Rui.

Signed-off-by: Rafael J. Wysocki <rjw@xxxxxxx>
Cc: Zhang Rui <rui.zhang@xxxxxxxxx>

diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c
index ce97bf3..261d19c 100644
--- a/arch/x86/kernel/e820.c
+++ b/arch/x86/kernel/e820.c
@@ -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.
  */
--
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