From: "Michael S. Tsirkin" <mst@redhat.com>
To: Yu Zhang <yu.c.zhang@linux.intel.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>,
qemu-devel@nongnu.org, Peter Xu <peterx@redhat.com>,
Igor Mammedov <imammedo@redhat.com>,
Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <rth@twiddle.net>
Subject: Re: [Qemu-devel] [PATCH v3 2/2] intel-iommu: extend VTD emulation to allow 57-bit IOVA address width.
Date: Fri, 21 Dec 2018 12:15:26 -0500 [thread overview]
Message-ID: <20181221120657-mutt-send-email-mst@kernel.org> (raw)
In-Reply-To: <20181221161920.45fnlmcp7aqu6ibi@linux.intel.com>
On Sat, Dec 22, 2018 at 12:19:20AM +0800, Yu Zhang wrote:
> > I'd like to avoid poking at the CPU from VTD code. That's all.
>
> OK. So for the short term，how about I remove the check of host cpu, and add a TODO
> in the comments in vtd_decide_config()?
My question would be what happens on an incorrect use?
And how does user figure out which values to set?
> As to the check against hardware IOMMU, Peter once had a proposal in
> http://lists.nongnu.org/archive/html/qemu-devel/2018-11/msg02281.html
>
> Do you have any comment or suggestion on Peter's proposal?
Sounds reasonable to me. Do we do it on vfio attach or unconditionally?
> I still do not quite know
> how to do it for now...
>
> [...]
>
>
> B.R.
> Yu
--
MST
next prev parent reply other threads:[~2018-12-21 17:15 UTC|newest]
Thread overview: 57+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-12-12 13:05 [Qemu-devel] [PATCH v3 0/2] intel-iommu: add support for 5-level virtual IOMMU Yu Zhang
2018-12-12 13:05 ` [Qemu-devel] [PATCH v3 1/2] intel-iommu: differentiate host address width from IOVA address width Yu Zhang
2018-12-17 13:17 ` Igor Mammedov
2018-12-18 9:27 ` Yu Zhang
2018-12-18 14:23 ` Michael S. Tsirkin
2018-12-18 14:55 ` Igor Mammedov
2018-12-18 14:58 ` Michael S. Tsirkin
2018-12-19 3:03 ` Yu Zhang
2018-12-19 3:12 ` Michael S. Tsirkin
2018-12-19 6:28 ` Yu Zhang
2018-12-19 15:30 ` Michael S. Tsirkin
2018-12-19 2:57 ` Yu Zhang
2018-12-19 10:40 ` Igor Mammedov
2018-12-19 16:47 ` Michael S. Tsirkin
2018-12-20 5:59 ` Yu Zhang
2018-12-20 21:18 ` Eduardo Habkost
2018-12-21 14:13 ` Igor Mammedov
2018-12-21 16:09 ` Yu Zhang
2018-12-21 17:04 ` Michael S. Tsirkin
2018-12-21 17:37 ` Yu Zhang
2018-12-21 19:02 ` Michael S. Tsirkin
2018-12-21 20:01 ` Eduardo Habkost
2018-12-22 1:11 ` Yu Zhang
2018-12-25 16:56 ` Michael S. Tsirkin
2018-12-26 5:30 ` Yu Zhang
2018-12-27 15:14 ` Eduardo Habkost
2018-12-28 2:32 ` Yu Zhang
2018-12-29 1:29 ` Eduardo Habkost
2019-01-15 7:13 ` Yu Zhang
2019-01-18 7:10 ` Yu Zhang
2018-12-27 14:54 ` Eduardo Habkost
2018-12-28 11:42 ` Igor Mammedov
2018-12-20 20:58 ` Eduardo Habkost
2018-12-12 13:05 ` [Qemu-devel] [PATCH v3 2/2] intel-iommu: extend VTD emulation to allow 57-bit " Yu Zhang
2018-12-17 13:29 ` Igor Mammedov
2018-12-18 9:47 ` Yu Zhang
2018-12-18 10:01 ` Yu Zhang
2018-12-18 12:43 ` Michael S. Tsirkin
2018-12-18 13:45 ` Yu Zhang
2018-12-18 14:49 ` Michael S. Tsirkin
2018-12-19 3:40 ` Yu Zhang
2018-12-19 4:35 ` Michael S. Tsirkin
2018-12-19 5:57 ` Yu Zhang
2018-12-19 15:23 ` Michael S. Tsirkin
2018-12-20 5:49 ` Yu Zhang
2018-12-20 18:28 ` Michael S. Tsirkin
2018-12-21 16:19 ` Yu Zhang
2018-12-21 17:15 ` Michael S. Tsirkin [this message]
2018-12-21 17:34 ` Yu Zhang
2018-12-21 18:10 ` Michael S. Tsirkin
2018-12-22 0:41 ` Yu Zhang
2018-12-25 17:00 ` Michael S. Tsirkin
2018-12-26 5:58 ` Yu Zhang
2018-12-25 1:59 ` Tian, Kevin
2018-12-14 9:17 ` [Qemu-devel] [PATCH v3 0/2] intel-iommu: add support for 5-level virtual IOMMU Yu Zhang
2019-01-15 4:02 ` Michael S. Tsirkin
2019-01-15 7:27 ` Yu Zhang
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