From: Peter Xu <peterx@redhat.com>
To: Auger Eric <eric.auger@redhat.com>
Cc: "Daniel P. Berrangé" <berrange@redhat.com>,
"Eduardo Habkost" <ehabkost@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
"Bandan Das" <bsd@redhat.com>, "Jason Wang" <jasowang@redhat.com>,
qemu-devel@nongnu.org,
"Alex Williamson" <alex.williamson@redhat.com>,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Igor Mammedov" <imammedo@redhat.com>,
"Richard Henderson" <rth@twiddle.net>
Subject: Re: [Qemu-devel] [PATCH RFC 0/4] intel_iommu: Do sanity check of vfio-pci earlier
Date: Thu, 29 Aug 2019 16:54:42 +0800 [thread overview]
Message-ID: <20190829085442.GI8729@xz-x1> (raw)
In-Reply-To: <85b87150-9414-00e6-86a3-cf92f1ca6f7c@redhat.com>
On Thu, Aug 29, 2019 at 10:46:42AM +0200, Auger Eric wrote:
> If I understand correctly PT mode is a bypass mode. With the ARM SMMUv3
> the IOMMU MR translate() function gets called but implements a direct
> mapping. I understand that on your side, you destroy the IOMMU MR, right?
>
> At the moment since SMMUv3/VFIO integration is not ready I plan to
> forbid any usage of VFIO along with SMMUv3, whatever the enable state.
>
> When HW nested paging gets ready, the stage1 bypass state will be
> propagated to the HW config structure.
>
> Hope I answer your question.
Yes, nested page tables will be fine. :)
Thanks,
--
Peter Xu
next prev parent reply other threads:[~2019-08-29 8:55 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-12 7:45 [Qemu-devel] [PATCH RFC 0/4] intel_iommu: Do sanity check of vfio-pci earlier Peter Xu
2019-08-12 7:45 ` [Qemu-devel] [PATCH RFC 1/4] intel_iommu: Sanity check vfio-pci config on machine init done Peter Xu
2019-09-16 7:11 ` Auger Eric
2019-09-16 7:56 ` Peter Xu
2019-08-12 7:45 ` [Qemu-devel] [PATCH RFC 2/4] qdev/machine: Introduce hotplug_allowed hook Peter Xu
2019-09-16 7:23 ` Auger Eric
2019-08-12 7:45 ` [Qemu-devel] [PATCH RFC 3/4] pc/q35: Disallow vfio-pci hotplug without VT-d caching mode Peter Xu
2019-09-16 7:23 ` Auger Eric
2019-08-12 7:45 ` [Qemu-devel] [PATCH RFC 4/4] intel_iommu: Remove the caching-mode check during flag change Peter Xu
2019-09-16 7:24 ` Auger Eric
2019-08-12 16:24 ` [Qemu-devel] [PATCH RFC 0/4] intel_iommu: Do sanity check of vfio-pci earlier Alex Williamson
2019-08-12 21:16 ` Peter Xu
2019-08-13 8:41 ` Jason Wang
2019-08-13 14:04 ` Peter Xu
2019-08-28 12:59 ` Auger Eric
2019-08-29 1:18 ` Peter Xu
2019-08-29 8:05 ` Auger Eric
2019-08-29 8:21 ` Peter Xu
2019-08-29 8:46 ` Auger Eric
2019-08-29 8:54 ` Peter Xu [this message]
2019-08-20 5:22 ` Peter Xu
2019-08-20 6:24 ` Paolo Bonzini
2019-08-21 5:03 ` Peter Xu
2019-08-21 7:50 ` Paolo Bonzini
2019-09-16 3:35 ` Peter Xu
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