From 35f0ce032b0f2d6974da516b5a113f49b7b70b09 Mon Sep 17 00:00:00 2001 From: Vernon Mauery Date: Tue, 5 Oct 2010 15:47:18 -0700 Subject: IBM Real-Time "SMI Free" mode driver -v7 After a period of RFC for this driver, I think it is ready for inclusion in the platform-driver-x86 tree, hopefully to be staged in the next merge window into Linus's tree. --Vernon ------------------------------------------------------------ IBM Real-Time "SMI Free" mode driver This driver supports the Real-Time Linux (RTL) BIOS feature. The RTL feature allows non-fatal System Management Interrupts (SMIs) to be disabled on supported IBM platforms and is intended to be coupled with a user-space daemon to monitor the hardware in a way that can be prioritized and scheduled to better suit the requirements for the system. The Device is presented as a special "_RTL_" table to the OS in the Extended BIOS Data Area. There is a simple protocol for entering and exiting the mode at runtime. This driver creates a simple sysfs interface to allow a simple entry and exit from RTL mode in the UFI/BIOS. Since the driver is specific to IBM SystemX hardware (x86- based servers) it only builds on x86 builds. To reduce the risk of loading on the wrong hardware, the module uses DMI information and checks a list of servers that are known to work. Signed-off-by: Vernon Mauery Signed-off-by: Matthew Garrett --- drivers/platform/x86/Kconfig | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'drivers/platform/x86/Kconfig') diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 91e431b6f20f..faec777b1ed4 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -615,6 +615,22 @@ config INTEL_IPS functionality. If in doubt, say Y here; it will only load on supported platforms. +config IBM_RTL + tristate "Device driver to enable PRTL support" + depends on X86 && PCI + ---help--- + Enable support for IBM Premium Real Time Mode (PRTM). + This module will allow you the enter and exit PRTM in the BIOS via + sysfs on platforms that support this feature. System in PRTM will + not receive CPU-generated SMIs for recoverable errors. Use of this + feature without proper support may void your hardware warranty. + + If the proper BIOS support is found the driver will load and create + /sys/devices/system/ibm_rtl/. The "state" variable will indicate + whether or not the BIOS is in PRTM. + state = 0 (BIOS SMIs on) + state = 1 (BIOS SMIs off) + config XO1_RFKILL tristate "OLPC XO-1 software RF kill switch" depends on OLPC -- cgit v1.2.3