From: will.deacon@arm.com (Will Deacon)
To: linux-arm-kernel@lists.infradead.org
Subject: question about : inv smmu atc all cmd timeout when pcie dpc occur.
Date: Tue, 3 Jul 2018 18:35:22 +0100 [thread overview]
Message-ID: <20180703173522.GE27243@arm.com> (raw)
In-Reply-To: <8CD08B4737CACA4ABE0228F45E441A91638018B0@dggemm521-mbs.china.huawei.com>
Hi Zhongmiao,
On Mon, Jul 02, 2018 at 02:24:45PM +0000, Zhongmiao wrote:
> I?m testing pcie ats feature . when some error occur pcie dpc
> then link down . iommu will remove device from iommu group and send atc
> inv all cmd to device .
>
>
>
> But , pcie already link down , so atc inv all will time out . I what to
> know kernel driver how to think aout it ? thanks . ^_^.
Mainline doesn't do anything with ATC invalidate. Which tree are you using?
Will
next parent reply other threads:[~2018-07-03 17:35 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <8CD08B4737CACA4ABE0228F45E441A91638018B0@dggemm521-mbs.china.huawei.com>
2018-07-03 17:35 ` Will Deacon [this message]
[not found] <8CD08B4737CACA4ABE0228F45E441A9163801C42@dggemm521-mbs.china.huawei.com>
2018-07-05 11:59 ` question about : inv smmu atc all cmd timeout when pcie dpc occur Jean-Philippe Brucker
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