[PATCH 5/5] irqchip: gicv3-its: add support for power down
marc.zyngier at arm.com
Fri Jan 30 11:23:00 PST 2015
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.
Jazz is not dead. It just smells funny...
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