[PATCH 5/5] irqchip: gicv3-its: add support for power down
From: Marc Zyngier <hidden>
Date: 2015-01-30 19:23:12
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From: Marc Zyngier <hidden>
Date: 2015-01-30 19:23:12
Also in:
lkml
On 30/01/15 07:46, Yun Wu wrote:
Configurations of an ITS cannot be changed if the ITS is in an active status, so it might not be safe to perform a soft reboot with all the active ITSes un-disabled, etc. kexec. This patch will make sure all the active ITSes disabled before enabling them again without resetting ITS hardware.
And what happens if the kernel crashes or gets rebooted from a watchdog? Or if the bootloader messes things up? The ITS is in an unknown state when we start again. Wouldn't it be better to address this instead? Enforcing an safe initial state seems a better solution that relying on mechanisms that may not be relevant for all cases. Thanks, M. -- Jazz is not dead. It just smells funny...