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UEFI platforms may provide a watchdog timer, which will reboot the machine if an operating system takes more than five minutes to load. This can cause long-lived iPXE downloads (or interactive shell sessions) to unexpectedly reboot. Fix by resetting the watchdog timer every ten seconds while the iPXE main processing loop continues to run. Reported-by: Bradley B Williams <bradleybwilliams@swbell.net> Reported-by: John Clark <john.r.clark.3@gmail.com> Reported-by: wdriever@gmail.com Reported-by: Charlie Beima <cbeima@indiana.edu> Signed-off-by: Michael Brown <mcb30@ipxe.org>
32 lines
492 B
C
32 lines
492 B
C
#ifndef _IPXE_EFI_WATCHDOG_H
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#define _IPXE_EFI_WATCHDOG_H
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/** @file
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*
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* EFI watchdog holdoff timer
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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extern struct retry_timer efi_watchdog;
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/**
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* Start EFI watchdog holdoff timer
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*
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*/
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static inline void efi_watchdog_start ( void ) {
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start_timer_nodelay ( &efi_watchdog );
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}
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/**
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* Stop EFI watchdog holdoff timer
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*
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*/
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static inline void efi_watchdog_stop ( void ) {
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stop_timer ( &efi_watchdog );
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}
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#endif /* _IPXE_EFI_WATCHDOG_H */
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