[PATCH 0/3] Timer events for OpenSBI

[Nicholas Piggin]

On Thu, Apr 23, 2026 at 01:38:55PM +0530, Anup Patel wrote:
> On Thu, Apr 23, 2026 at 12:27 PM Nicholas Piggin <npiggin at gmail.com> wrote:
> >
> > On Wed, Apr 15, 2026 at 04:29:59PM +0530, Anup Patel wrote:
> > > This series extends the sbi_timer framework to support
> > > timer events usable from any part of OpenSBI. The platform
> > > drivers in OpenSBI can use timer events for timeouts or
> > > periodic checks.
> > >
> > > These patches can also be found in sbi_timer_imp_v1 branch
> > > at: https://github.com/avpatel/opensbi.git
> >
> > What is your m mode use case for these, I would be interested
> > in the context of reviewing it. Generally I thought it looks
> > good.
> >
> 
> We have a RPMI watchdog proposal under development. This
> series will provide foundation for the PoC work of the RPMI
> watchdog proposal. Basically, the OpenSBI firmware can emulate
> RPMI watchdog over SBI MPXY channel for the supervisor software.
> This OpenSBI can provide a separate watchdog for each supervisor
> domain. In absence of HW watchdog for M-mode firmware, the PuC
> firmware can also implement RPMI watchdog over RPMI shared
> memory transport.

Oh nice, that's an important feature for HA. Good use of m mode
timers.

Thanks,
Nick