From: Alex Williamson <alex.williamson@redhat.com>
To: Paolo Bonzini <pbonzini@redhat.com>
Cc: Jean-Philippe Brucker <jean-philippe@linaro.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
qemu-devel@nongnu.org, peterx@redhat.com, eric.auger@redhat.com,
bbhushan2@marvell.com
Subject: Re: [PATCH v10 10/10] vfio: Don't issue full 2^64 unmap
Date: Mon, 2 Nov 2020 11:00:52 -0700 [thread overview]
Message-ID: <20201102110052.410b1d35@w520.home> (raw)
In-Reply-To: <cf320b8e-d3a3-ae69-69ec-405bb58948ed@redhat.com>
On Mon, 2 Nov 2020 18:44:11 +0100
Paolo Bonzini <pbonzini@redhat.com> wrote:
> On 02/11/20 18:37, Alex Williamson wrote:
> > I think we still have the issue at the vfio ioctl which takes __u64 iova
> > and size parameters, in bytes. Therefore we cannot unmap an entire
> > 64-bit address space with a single ioctl call. We'd need to make use
> > of a flag to modify the ioctl behavior to work terms of some page size
> > to achieve this, for example if iova and size were in terms of 4K
> > pages, we wouldn't have this issue. Thanks,
>
> What happens to the last page if size is unaligned (e.g. iova==0, size==
> 2^64-1)?
Both args are currently required to be aligned to the minimum IOMMU
page size. Thanks,
Alex
next prev parent reply other threads:[~2020-11-02 18:02 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-08 17:15 [PATCH v10 00/10] virtio-iommu: VFIO integration Jean-Philippe Brucker
2020-10-08 17:15 ` [PATCH v10 01/10] virtio-iommu: Fix virtio_iommu_mr() Jean-Philippe Brucker
2020-10-16 7:36 ` Auger Eric
2020-10-19 21:36 ` Peter Xu
2020-10-08 17:15 ` [PATCH v10 02/10] virtio-iommu: Store memory region in endpoint struct Jean-Philippe Brucker
2020-10-16 7:37 ` Auger Eric
2020-10-08 17:15 ` [PATCH v10 03/10] virtio-iommu: Add memory notifiers for map/unmap Jean-Philippe Brucker
2020-10-16 7:58 ` Auger Eric
2020-10-22 16:41 ` Jean-Philippe Brucker
2020-10-08 17:15 ` [PATCH v10 04/10] virtio-iommu: Call memory notifiers in attach/detach Jean-Philippe Brucker
2020-10-16 8:05 ` Auger Eric
2020-10-08 17:15 ` [PATCH v10 05/10] virtio-iommu: Add replay() memory region callback Jean-Philippe Brucker
2020-10-16 9:12 ` Auger Eric
2020-10-22 16:42 ` Jean-Philippe Brucker
2020-10-08 17:15 ` [PATCH v10 06/10] virtio-iommu: Add notify_flag_changed() " Jean-Philippe Brucker
2020-10-16 8:18 ` Auger Eric
2020-10-08 17:15 ` [PATCH v10 07/10] memory: Add interface to set iommu page size mask Jean-Philippe Brucker
2020-10-16 9:24 ` Auger Eric
2020-10-22 16:43 ` Jean-Philippe Brucker
2020-10-19 21:36 ` Peter Xu
2020-10-08 17:15 ` [PATCH v10 08/10] vfio: Set IOMMU page size as per host supported page size Jean-Philippe Brucker
2020-10-08 21:22 ` Alex Williamson
2020-10-30 10:26 ` Michael S. Tsirkin
2020-10-30 15:19 ` Jean-Philippe Brucker
2020-10-16 9:25 ` Auger Eric
2020-10-08 17:15 ` [PATCH v10 09/10] virtio-iommu: Set supported page size mask Jean-Philippe Brucker
2020-10-16 13:08 ` Auger Eric
2020-10-22 16:43 ` Jean-Philippe Brucker
2020-10-19 21:35 ` Peter Xu
2020-10-22 16:39 ` Jean-Philippe Brucker
2020-10-22 20:56 ` Peter Xu
2020-10-23 7:48 ` Jean-Philippe Brucker
2020-10-23 16:47 ` Peter Xu
2020-10-27 17:38 ` Jean-Philippe Brucker
2020-10-30 10:24 ` Michael S. Tsirkin
2020-10-08 17:15 ` [PATCH v10 10/10] vfio: Don't issue full 2^64 unmap Jean-Philippe Brucker
2020-10-08 21:22 ` Alex Williamson
2020-10-30 10:25 ` Michael S. Tsirkin
2020-10-30 17:26 ` Alex Williamson
2020-10-30 18:19 ` Paolo Bonzini
2020-11-02 17:37 ` Alex Williamson
2020-11-02 17:44 ` Paolo Bonzini
2020-11-02 18:00 ` Alex Williamson [this message]
2020-10-16 9:47 ` Auger Eric
2020-10-16 13:13 ` [PATCH v10 00/10] virtio-iommu: VFIO integration Auger Eric
2020-10-30 10:27 ` Michael S. Tsirkin
2020-10-30 10:48 ` Jean-Philippe Brucker
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