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From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: rjw@rjwysocki.net, lenb@kernel.org, joro@8bytes.org,
	mst@redhat.com, will@kernel.org, linux-acpi@vger.kernel.org,
	iommu@lists.linux-foundation.org,
	virtualization@lists.linux-foundation.org, eric.auger@redhat.com,
	sebastien.boeuf@intel.com, kevin.tian@intel.com,
	lorenzo.pieralisi@arm.com
Subject: Re: [PATCH 3/3] iommu/virtio: Enable x86 support
Date: Thu, 15 Apr 2021 17:14:13 +0200
Message-ID: <YHhYRQlDdCLfmDnf@myrica> (raw)
In-Reply-To: <2d57860b-8a1c-f345-1105-62680c003fb5@arm.com>

On Thu, Mar 18, 2021 at 11:43:38AM +0000, Robin Murphy wrote:
> On 2021-03-16 19:16, Jean-Philippe Brucker wrote:
> > With the VIOT support in place, x86 platforms can now use the
> > virtio-iommu.
> > 
> > The arm64 Kconfig selects IOMMU_DMA, while x86 IOMMU drivers select it
> > themselves.
> 
> Actually, now that both AMD and Intel are converted over, maybe it's finally
> time to punt that to x86 arch code to match arm64?

x86 also has CONFIG_HYPERV_IOMMU that doesn't use IOMMU_DMA, and might not
want to pull in dma-iommu.o + iova.o (don't know if they care about guest
size). There also is the old gart driver, but that doesn't select
IOMMU_SUPPORT. 

Thanks,
Jean

  reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-16 19:16 [PATCH 0/3] Add support for ACPI VIOT Jean-Philippe Brucker
2021-03-16 19:16 ` [PATCH 1/3] ACPICA: iASL: Add definitions for the VIOT table Jean-Philippe Brucker
2021-03-18 17:52   ` Auger Eric
2021-04-15 14:36     ` Jean-Philippe Brucker
2021-03-16 19:16 ` [PATCH 2/3] ACPI: Add driver " Jean-Philippe Brucker
2021-03-18 19:36   ` Robin Murphy
2021-04-15 14:31     ` Jean-Philippe Brucker
2021-03-19 10:44   ` Auger Eric
2021-04-15 14:46     ` Jean-Philippe Brucker
2021-03-16 19:16 ` [PATCH 3/3] iommu/virtio: Enable x86 support Jean-Philippe Brucker
2021-03-18 10:44   ` Joerg Roedel
2021-03-18 11:43   ` Robin Murphy
2021-04-15 15:14     ` Jean-Philippe Brucker [this message]
2021-03-18 18:28   ` Michael S. Tsirkin
2021-04-15 15:15     ` Jean-Philippe Brucker
2021-03-19 10:58 ` [PATCH 0/3] Add support for ACPI VIOT Auger Eric
2021-03-19 11:16   ` Jean-Philippe Brucker

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