On Fri, Sep 22, 2017 at 07:26:08PM +0100, James Morse wrote: > The Software Delegated Exception Interface (SDEI) is an ARM standard > for registering callbacks from the platform firmware into the OS. > This is typically used to implement firmware notifications (such as > firmware-first RAS) or promote an IRQ that has been promoted to a > firmware-assisted NMI. > > Add the code for detecting the SDEI version and the framework for > registering and unregistering events. Subsequent patches will add the > arch-specific backend code and the necessary power management hooks. > > Only shared events are supported, power management, private events and > discovery for ACPI systems will be added by later patches. > > Signed-off-by: James Morse <james.morse@xxxxxxx> > --- > Changes since v2: > * Copy the priority into the structure the arch asm handler gets. This > is used for VMAP stacks where we can't know if a critical event interrupted > a normal priority event, thus they need separate stacks. > > Changes since v1: > * Changed entry point to unsigned long, if we support non-vhe systems this > won't be a valid pointer > * Made invoke_sdei_fn() pass the only register we are interested in, instead > of the whole arm_smccc_res > * Made all the locking WARN_ON()s lockdep_assert_held()s. > * Moved more messages from 'err' to 'warn'. > * Made IS_SDEI_CALL() not depend on whether the config option is selected. > * Made 'event failed' messages rate limited. > > drivers/firmware/Kconfig | 7 + > drivers/firmware/Makefile | 1 + > drivers/firmware/arm_sdei.c | 616 ++++++++++++++++++++++++++++++++++++++++++++ > include/linux/sdei.h | 100 +++++++ > include/uapi/linux/sdei.h | 91 +++++++ > 5 files changed, 815 insertions(+) > create mode 100644 drivers/firmware/arm_sdei.c > create mode 100644 include/linux/sdei.h > create mode 100644 include/uapi/linux/sdei.h I haven't reviewed this patch (yet...). However, I think it's worth adding a MAINTAINERS entry with your name on it (unless you really want to distance yourself from this code once merged ;)). Thanks. -- Catalin -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
