Messages in this thread | | | Date | Fri, 3 Oct 2008 11:58:35 -0500 | From | Russ Anderson <> | Subject | [PATCH 0/4] x86: UV runtime bios calls v4 |
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[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@intel.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@sgi.com
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