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Re: [PATCH 07/11] x86: remove the IOMMU table infrastructure
- To: Anatoly Pugachev <matorola@xxxxxxxxx>
- From: Christoph Hellwig <hch@xxxxxx>
- Date: Wed, 2 Mar 2022 10:22:04 +0100
- Cc: Christoph Hellwig <hch@xxxxxx>, iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx, x86@xxxxxxxxxx, Anshuman Khandual <anshuman.khandual@xxxxxxx>, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Joerg Roedel <joro@xxxxxxxxxx>, David Woodhouse <dwmw2@xxxxxxxxxxxxx>, Lu Baolu <baolu.lu@xxxxxxxxxxxxxxx>, Robin Murphy <robin.murphy@xxxxxxx>, linux-arm-kernel@xxxxxxxxxxxxxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-ia64@xxxxxxxxxxxxxxx, linux-mips@xxxxxxxxxxxxxxx, linuxppc-dev@xxxxxxxxxxxxxxxx, linux-riscv@xxxxxxxxxxxxxxxxxxx, linux-s390 <linux-s390@xxxxxxxxxxxxxxx>, linux-hyperv@xxxxxxxxxxxxxxx, tboot-devel@xxxxxxxxxxxxxxxxxxxxx, linux-pci@xxxxxxxxxxxxxxx
- Delivery-date: Wed, 02 Mar 2022 09:22:11 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Wed, Mar 02, 2022 at 12:18:26PM +0300, Anatoly Pugachev wrote:
> Is it possible to keep documentation comments in source files? Or are
> they completely irrelevant now?
That ones you quoted are very much irrelevant now. And the behaviour
of the swiotlb disabling will have to change (this patchset is a bit
of a preparation for now) as we now use per-device dma_ops and the
dma-iommu can dip into the swiotlb pool for untrusted devices. In
practive we'll basically have to always initialize the swiotlb buffer
now.
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