On Wed, Sep 15, 2021 at 22:55:03 +0700, Nhi Pham wrote: > The FailSafeDxe is a driver for the FailSafe feature which reverts the > system's configuration to known good values if the system fails to boot > up multiple times. Also, this driver implements the Watchdog Timer > Architectural Protocol to reset the system if it hangs, which is > implemented by the MdeModulePkg/Universal/WatchdogTimerDxe module. So, > the WDT is now used exclusively by the FailSafeDxe. > > By default, when system starts, it configures the secure watchdog timer > with a default value of 5 minutes. If the system boots up cleanly to the > considered good stage, the counter is cleared as it indicates FailSafe > monitor (ATF) that has booted up successfully. If the timer expires, it > is considered a failed boot and the system is rebooted. > > Cc: Thang Nguyen <th...@os.amperecomputing.com> > Cc: Chuong Tran <chu...@os.amperecomputing.com> > Cc: Phong Vo <ph...@os.amperecomputing.com> > Cc: Leif Lindholm <l...@nuviainc.com> > Cc: Michael D Kinney <michael.d.kin...@intel.com> > Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org> > Cc: Nate DeSimone <nathaniel.l.desim...@intel.com> > > Signed-off-by: Nhi Pham <n...@os.amperecomputing.com>
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