From: marc.zyngier@arm.com (Marc Zyngier)
To: linux-arm-kernel@lists.infradead.org
Subject: A problem about interrupt when booting a captured kernel
Date: Mon, 16 Nov 2015 19:26:28 +0000 [thread overview]
Message-ID: <564A2DE4.4030702@arm.com> (raw)
In-Reply-To: <5645B6D3.60305@huawei.com>
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...
next prev parent reply other threads:[~2015-11-16 19:26 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-13 10:09 A problem about interrupt when booting a captured kernel Yang Yingliang
2015-11-16 19:26 ` Marc Zyngier [this message]
2015-11-17 1:05 ` AKASHI Takahiro
2015-11-17 9:07 ` Marc Zyngier
2015-11-18 8:03 ` AKASHI Takahiro
2015-11-18 11:29 ` Marc Zyngier
2015-11-17 3:48 ` Yang Yingliang
2015-11-17 9:16 ` Marc Zyngier
2015-11-19 3:42 ` Yang Yingliang
2015-11-19 8:40 ` Marc Zyngier
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