Re: [PATCH 0/5] iommu: Some IOVA code reorganisation
From: Robin Murphy <robin.murphy@arm.com>
Date: 2021-11-16 14:26:02
Also in:
linux-iommu, lkml
On 2021-11-16 14:21, John Garry wrote:
On 04/10/2021 12:44, Will Deacon wrote:quoted
On Fri, Sep 24, 2021 at 06:01:52PM +0800, John Garry wrote:quoted
The IOVA domain structure is a bit overloaded, holding: - IOVA tree management - FQ control - IOVA rcache memories Indeed only a couple of IOVA users use the rcache, and only dma-iommu.c uses the FQ feature. This series separates out that structure. In addition, it moves the FQ code into dma-iommu.c . This is not strictly necessary, but it does make it easier for the FQ domain lookup the rcache domain. The rcache code stays where it is, as it may be reworked in future, so there is not much point in relocating and then discarding. This topic was initially discussed and suggested (I think) by Robin here: https://lore.kernel.org/linux-iommu/1d06eda1-9961-d023-f5e7-fe87e768f067@arm.com/ (local)It would be useful to have Robin's Ack on patches 2-4. The implementation looks straightforward to me, but the thread above isn't very clear about what is being suggested.Hi Robin, Just wondering if you had made any progress on your FQ code rework or your own re-org?
Hey John - as it happens I started hacking on that in earnest about half an hour ago, aiming to get something out later this week. Cheers, Robin.
I wasn't planning on progressing https://lore.kernel.org/linux-iommu/1626259003-201303-1-git-send-email-john.garry@huawei.com/ (local) until this is done first (and that is still a big issue), even though not strictly necessary. Thanks, John
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