Thread (13 messages) 13 messages, 2 authors, 2015-01-31

[PATCH 5/5] irqchip: gicv3-its: add support for power down

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...
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