What about this patch for the passing of pram?
diff --git a/grub-core/mmap/efi/mmap.c b/grub-core/mmap/efi/mmap.c
index 900a4d6..0c03c5d 100644
--- a/grub-core/mmap/efi/mmap.c
+++ b/grub-core/mmap/efi/mmap.c
@@ -118,6 +118,12 @@ grub_efi_mmap_iterate (grub_memory_hook_t hook,
void *hook_data,
GRUB_MEMORY_NVS, hook_data);
break;
+ case GRUB_EFI_PERSISTENT_MEMORY:
+ hook (desc->physical_start, desc->num_pages * 4096,
+ GRUB_MEMORY_PRAM, hook_data);
+ break;
+
+
default:
grub_printf ("Unknown memory type %d, considering reserved\n",
desc->type);
diff --git a/include/grub/efi/api.h b/include/grub/efi/api.h
index 24a05c5..2bbfe34 100644
--- a/include/grub/efi/api.h
+++ b/include/grub/efi/api.h
@@ -476,6 +476,7 @@ enum grub_efi_memory_type
GRUB_EFI_MEMORY_MAPPED_IO,
GRUB_EFI_MEMORY_MAPPED_IO_PORT_SPACE,
GRUB_EFI_PAL_CODE,
+ GRUB_EFI_PERSISTENT_MEMORY,
GRUB_EFI_MAX_MEMORY_TYPE
};
typedef enum grub_efi_memory_type grub_efi_memory_type_t;
diff --git a/include/grub/memory.h b/include/grub/memory.h
index 083cfb6..1003a9c 100644
--- a/include/grub/memory.h
+++ b/include/grub/memory.h
@@ -30,6 +30,7 @@ typedef enum grub_memory_type
GRUB_MEMORY_ACPI = 3,
GRUB_MEMORY_NVS = 4,
GRUB_MEMORY_BADRAM = 5,
+ GRUB_MEMORY_PRAM = 7,
GRUB_MEMORY_COREBOOT_TABLES = 16,
GRUB_MEMORY_CODE = 20,
/* This one is special: it's used internally but is never reported
>>> Note (b): The internal GRUB_MEMORY_CODE (20) value is
>>> leaking through to the E820 table.
>>>
>>> That appears to be from this patch on 2013-10-14:
>>> 6de9ee86 Pass-through unknown E820 types
>>
>> If we are discussing ACPI 6.0 systems here, it explicitly says that
>> values above 12 should be treated as reserved. Does it cause
>> problems?
>
> All undefined values are reserved for future standardization;
> the meaning they might have in the future is unpredictable.
>
> Software compatible with ACPI 6.0 is supposed to treat them as
> reserved, but software compatible with a future version of ACPI
> might interpret them as having some different meaning that isn't
> compatible with GRUB_MEMORY_CODE.
>
> Some companies used e820 type 12 to mean persistent memory without
> getting that assigned by the ACPI WG, so that value was
> contaminated. We should probably mark 20 as contaminated too,
> given this issue.
>
I see now that we have leaked 16 (coreboot tables) as well. Could we
mark 16 as contaminated as well?
For memory code: should we just pass reserved in linux e820 or is it
better to keep doing this bug given possible reliance on it by other
software?
>
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