Messages in this thread | | | Date | Fri, 22 Aug 2008 16:50:30 -0500 | From | Russ Anderson <> | Subject | [PATCH 0/4] x86: UV runtime bios calls |
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[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@sgi.com
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