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authorYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 12:17:53 -0700
committerYunhong Jiang <yunhong.jiang@intel.com>2015-08-04 15:44:42 -0700
commit9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch)
tree1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/Documentation/ABI/testing/sysfs-firmware-gsmi
parent98260f3884f4a202f9ca5eabed40b1354c489b29 (diff)
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base. It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and the base is: commit 0917f823c59692d751951bf5ea699a2d1e2f26a2 Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Date: Sat Jul 25 12:13:34 2015 +0200 Prepare v4.1.3-rt3 Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> We lose all the git history this way and it's not good. We should apply another opnfv project repo in future. Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423 Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
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+What: /sys/firmware/gsmi
+Date: March 2011
+Contact: Mike Waychison <mikew@google.com>
+Description:
+ Some servers used internally at Google have firmware
+ that provides callback functionality via explicit SMI
+ triggers. Some of the callbacks are similar to those
+ provided by the EFI runtime services page, but due to
+ historical reasons this different entry-point has been
+ used.
+
+ The gsmi driver implements the kernel's abstraction for
+ these firmware callbacks. Currently, this functionality
+ is limited to handling the system event log and getting
+ access to EFI-style variables stored in nvram.
+
+ Layout:
+
+ /sys/firmware/gsmi/vars:
+
+ This directory has the same layout (and
+ underlying implementation as /sys/firmware/efi/vars.
+ See Documentation/ABI/*/sysfs-firmware-efi-vars
+ for more information on how to interact with
+ this structure.
+
+ /sys/firmware/gsmi/append_to_eventlog - write-only:
+
+ This file takes a binary blob and passes it onto
+ the firmware to be timestamped and appended to
+ the system eventlog. The binary format is
+ interpreted by the firmware and may change from
+ platform to platform. The only kernel-enforced
+ requirement is that the blob be prefixed with a
+ 32bit host-endian type used as part of the
+ firmware call.
+
+ /sys/firmware/gsmi/clear_config - write-only:
+
+ Writing any value to this file will cause the
+ entire firmware configuration to be reset to
+ "factory defaults". Callers should assume that
+ a reboot is required for the configuration to be
+ cleared.
+
+ /sys/firmware/gsmi/clear_eventlog - write-only:
+
+ This file is used to clear out a portion/the
+ whole of the system event log. Values written
+ should be values between 1 and 100 inclusive (in
+ ASCII) representing the fraction of the log to
+ clear. Not all platforms support fractional
+ clearing though, and this writes to this file
+ will error out if the firmware doesn't like your
+ submitted fraction.
+
+ Callers should assume that a reboot is needed
+ for this operation to complete.