A problem about interrupt when booting a captured kernel
Marc Zyngier
marc.zyngier at arm.com
Mon Nov 16 11:26:28 PST 2015
On 13/11/15 10:09, Yang Yingliang wrote:
> Hi, Marc
>
>
> The kexec will boot a captured kernel while the kernel panic. But
> it boots failed if the kernel panic in handler function of PPI. The
> reason is that the PPI has not been 'eoi', other interrupts can not be
> handled when booting the captured kernel.
>
> The kexec will call irq_eoi to end the irqs that have
> IRQD_IRQ_INPROGRESS flag. But PPIs don't have this flag, so it won't be
> ended.
>
> Three ways to solve this problem we can think :
> 1. Is there a way to reset gic like its_reset ?
> 2. Can we add some flag for calling irq_eoi ?
> 3. Just 'eoi' all PPIs without checking flags in kexec.
>
> Please give some advice.
Good timing. Please see:
http://lists.infradead.org/pipermail/linux-arm-kernel/2015-November/385383.html
and let me know if that fixes things for you.
Thanks,
M.
--
Jazz is not dead. It just smells funny...
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