From: "Arend van Spriel" <arend-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
To: Matt Fleming <matt.fleming-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
Cc: linux-efi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
"linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>
Subject: access efi variables
Date: Fri, 13 Sep 2013 17:37:29 +0200 [thread overview]
Message-ID: <52333139.6020203@broadcom.com> (raw)
I need to obtain a uefi variable so I went looking at the API in
include/linux/efi.h. I found the following definition:
/*
* The maximum size of VariableName + Data = 1024
* Therefore, it's reasonable to save that much
* space in each part of the structure,
* and we use a page for reading/writing.
*/
struct efi_variable {
efi_char16_t VariableName[1024/sizeof(efi_char16_t)];
efi_guid_t VendorGuid;
unsigned long DataSize;
__u8 Data[1024];
efi_status_t Status;
__u32 Attributes;
} __attribute__((packed));
But according to the specs the variable I need to obtain is 2k bytes.
Should I expect trouble :-p
Regards,
Arend
WARNING: multiple messages have this Message-ID (diff)
From: "Arend van Spriel" <arend@broadcom.com>
To: "Matt Fleming" <matt.fleming@intel.com>
Cc: linux-efi@vger.kernel.org,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: access efi variables
Date: Fri, 13 Sep 2013 17:37:29 +0200 [thread overview]
Message-ID: <52333139.6020203@broadcom.com> (raw)
I need to obtain a uefi variable so I went looking at the API in
include/linux/efi.h. I found the following definition:
/*
* The maximum size of VariableName + Data = 1024
* Therefore, it's reasonable to save that much
* space in each part of the structure,
* and we use a page for reading/writing.
*/
struct efi_variable {
efi_char16_t VariableName[1024/sizeof(efi_char16_t)];
efi_guid_t VendorGuid;
unsigned long DataSize;
__u8 Data[1024];
efi_status_t Status;
__u32 Attributes;
} __attribute__((packed));
But according to the specs the variable I need to obtain is 2k bytes.
Should I expect trouble :-p
Regards,
Arend
next reply other threads:[~2013-09-13 15:37 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-09-13 15:37 Arend van Spriel [this message]
2013-09-13 15:37 ` access efi variables Arend van Spriel
2013-09-13 16:39 ` Arend van Spriel
[not found] ` <52333139.6020203-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
2013-09-13 22:37 ` H. Peter Anvin
2013-09-13 22:37 ` H. Peter Anvin
[not found] ` <5233939B.3020401-YMNOUZJC4hwAvxtiuMwx3w@public.gmane.org>
2013-09-14 17:01 ` Arend van Spriel
2013-09-14 17:01 ` Arend van Spriel
[not found] ` <5234965F.3050404-dY08KVG/lbpWk0Htik3J/w@public.gmane.org>
2013-09-17 15:46 ` Matt Fleming
2013-09-17 15:46 ` Matt Fleming
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