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Message-ID: <20080822215030.GA143104@sgi.com>
Date: Fri, 22 Aug 2008 16:50:30 -0500
From: Russ Anderson <rja@....com>
To: linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de
Cc: Russ Anderson <rja@....com>, Jack Steiner <steiner@....com>
Subject: [PATCH 0/4] x86: UV runtime bios calls
[PATCH 0/4] x86: UV runtime bios calls
Purpose:
Create an interface to allow calls into bios to return platform
specific information. The interface uses EFI SAL table entry.
EFI provides a mechanism for defining function pointers to
firmware routines. This patchset builds on the EFI mechanism
to provide access to those firmware routines.
Patches:
uv_efi_bios: Look for SAL entry in EFI tables.
uv_bios_common: Add the EFI callback function using the EFI table
entry. Create associated wrapper code. Initialize
SAL system table entry info at boot time.
uv_bios_call_partition: Add call to get partitioning related info.
uv_sysfs: Create sysfs entrys in /sys/firmware/sgi_uv/ for
partitioning related information.
Implementation comments:
This patch uses sal_systab. sal_systab is used on ia64, but was
not used on x86. An alternative would be to create a new
EFI entry type (uv_systab), though that would require adding
to struct efi.
The location in sysfs (/sys/firmware/sgi_uv/) is based on
community feedback.
If EFI is not configured (CONFIG_EFI), the calls will return -ENOSYS.
If run on a system with a bios that does not supportes EFI SAL, the
calls will return -ENOSYS.
Paul Jackson assisted in the development of this code.
--
Russ Anderson, OS RAS/Partitioning Project Lead
SGI - Silicon Graphics Inc rja@....com
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