linux-kernel - [PATCH 0/4] x86: UV runtime bios calls v4

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Date:	Fri, 3 Oct 2008 11:58:35 -0500
From:	Russ Anderson <rja@....com>
To:	linux-kernel@...r.kernel.org, mingo@...e.hu, tglx@...utronix.de
Cc:	Huang Ying <ying.huang@...el.com>,
	"H. Peter Anvin" <hpa@...or.com>, Jack Steiner <steiner@....com>,
	Russ Anderson <rja@....com>
Subject: [PATCH 0/4] x86: UV runtime bios calls v4

[PATCH 0/4] x86: UV runtime bios calls v4

Purpose: 
	Create an interface to allow calls into bios to return platform
	specific information.  The interface adds a new EFI table entry
	for UV.  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 for UV.

Version 4 changes:
	Undo the version 3 changes.
	Move implementation without CONFIG_EFI defined out of CONFIG_X86_32
	block.
	Add Acked-by: Huang Ying <ying.huang@...el.com>

Version 3 changes:
	Add function (oem) to efi_runtime_services_t, replacing uv_systab.
	Use efi_call_virt<n>.
	Remove efi_call<n> stubs.

Version 2 changes:
	Add uv_systab to efi struct.
	Define efi_call* stubs in include/asm-x86/uv/bios.h.
	Made symbols EXPORT_SYMBOL_GPL().
	Added check for failure on sysfs_create_file() calls.
	Other code style changes.


Patches:
	uv_efi_bios:	Look for UV entry in EFI tables.

	uv_bios_common:	Add the EFI callback function using the EFI table
			entry.  Create associated wrapper code.  Initialize
			UV 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 adds a new EFI entry type (uv_systab).

	The location in sysfs (/sys/firmware/sgi_uv/) is based on
	community feedback.  The interface is documented in
	Documentation/ABI/testing/sysfs-firmware-sgi_uv.

	If EFI is not configured (CONFIG_EFI), the calls will return -ENOSYS.
	If run on a system with a bios that does not support EFI UV, 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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