From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: Vivek Kumar Gautam <vivek.gautam@arm.com>
Cc: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
iommu@lists.linux-foundation.org,
virtualization@lists.linux-foundation.org, joro@8bytes.org,
will.deacon@arm.com, mst@redhat.com, robin.murphy@arm.com,
eric.auger@redhat.com, kevin.tian@intel.com,
jacob.jun.pan@linux.intel.com, yi.l.liu@intel.com,
Lorenzo.Pieralisi@arm.com, shameerali.kolothum.thodi@huawei.com,
Alex Williamson <alex.williamson@redhat.com>
Subject: Re: [PATCH RFC v1 01/11] uapi/virtio-iommu: Add page request grp-id and flags information
Date: Thu, 30 Sep 2021 09:49:16 +0100 [thread overview]
Message-ID: <YVV6DD7zmy1MKva0@myrica> (raw)
In-Reply-To: <3b490967-58b5-7c4a-2275-250e26d24aeb@arm.com>
On Thu, Sep 30, 2021 at 10:26:35AM +0530, Vivek Kumar Gautam wrote:
> > I'm not sure why we made it 32-bit in Linux UAPI, it's a little wasteful.
> > PCIe PRGI is 9-bits and SMMU STAG is 16-bits. Since the scope of the grpid
> > is the endpoint, 16-bit means 64k in-flight faults per endpoint, which
> > seems more than enough.
>
> Right, I will update this to 16-bits field. It won't be okay to update the
> iommu uAPI now, right?
Since there is no UAPI transport for the fault request/response at the
moment, it should be possible to update it.
Thanks,
Jean
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-09-30 8:52 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-23 9:51 [PATCH RFC v1 00/11] iommu/virtio: vSVA support with Arm Vivek Gautam
2021-04-23 9:51 ` [PATCH RFC v1 01/11] uapi/virtio-iommu: Add page request grp-id and flags information Vivek Gautam
2021-09-21 15:58 ` Jean-Philippe Brucker
2021-09-30 4:56 ` Vivek Kumar Gautam
2021-09-30 8:49 ` Jean-Philippe Brucker [this message]
2021-09-30 10:57 ` Vivek Kumar Gautam
2021-04-23 9:51 ` [PATCH RFC v1 02/11] iommu/virtio: Maintain a list of endpoints served by viommu_dev Vivek Gautam
2021-09-21 15:59 ` Jean-Philippe Brucker
2021-09-30 9:17 ` Vivek Kumar Gautam
2021-04-23 9:51 ` [PATCH RFC v1 03/11] iommu/virtio: Handle incoming page faults Vivek Gautam
2021-09-21 16:03 ` Jean-Philippe Brucker
2021-10-11 8:11 ` Vivek Gautam
2021-10-11 9:16 ` Jean-Philippe Brucker
2021-10-11 9:20 ` Vivek Kumar Gautam
2021-04-23 9:51 ` [PATCH RFC v1 04/11] iommu/virtio: Add a io page fault queue Vivek Gautam
2021-04-23 9:51 ` [PATCH RFC v1 05/11] iommu/virtio: Add SVA feature and related enable/disable callbacks Vivek Gautam
2021-09-21 16:04 ` Jean-Philippe Brucker
2021-04-23 9:51 ` [PATCH RFC v1 06/11] iommu/pasid-table: Add pasid table ops for shared context management Vivek Gautam
2021-04-23 9:51 ` [PATCH RFC v1 07/11] iommu/arm-smmu-v3: Move shared context descriptor code to cd-lib Vivek Gautam
2021-04-23 9:51 ` [PATCH RFC v1 08/11] iommu/arm-smmu-v3: Implement shared context alloc and free ops Vivek Gautam
2021-09-21 16:07 ` Jean-Philippe Brucker
2021-09-30 9:50 ` Vivek Kumar Gautam
2021-04-23 9:51 ` [PATCH RFC v1 09/11] iommu/virtio: Implement sva bind/unbind calls Vivek Gautam
2021-09-21 16:09 ` Jean-Philippe Brucker
2021-04-23 9:51 ` [PATCH RFC v1 10/11] uapi/virtio-iommu: Add a new request type to send page response Vivek Gautam
2021-09-21 16:16 ` Jean-Philippe Brucker
2021-09-30 9:24 ` Vivek Kumar Gautam
2021-10-06 9:55 ` Jean-Philippe Brucker
2021-04-23 9:51 ` [PATCH RFC v1 11/11] iommu/virtio: Add support " Vivek Gautam
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YVV6DD7zmy1MKva0@myrica \
--to=jean-philippe@linaro.org \
--cc=Lorenzo.Pieralisi@arm.com \
--cc=alex.williamson@redhat.com \
--cc=eric.auger@redhat.com \
--cc=iommu@lists.linux-foundation.org \
--cc=jacob.jun.pan@linux.intel.com \
--cc=joro@8bytes.org \
--cc=kevin.tian@intel.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mst@redhat.com \
--cc=robin.murphy@arm.com \
--cc=shameerali.kolothum.thodi@huawei.com \
--cc=virtualization@lists.linux-foundation.org \
--cc=vivek.gautam@arm.com \
--cc=will.deacon@arm.com \
--cc=yi.l.liu@intel.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).