From: "Tian, Kevin" <kevin.tian@intel.com>
To: Lu Baolu <baolu.lu@linux.intel.com>,
Joerg Roedel <joro@8bytes.org>,
"David Woodhouse" <dwmw2@infradead.org>,
Alex Williamson <alex.williamson@redhat.com>,
Kirti Wankhede <kwankhede@nvidia.com>
Cc: "Raj, Ashok" <ashok.raj@intel.com>,
"Kumar, Sanjay K" <sanjay.k.kumar@intel.com>,
"Pan, Jacob jun" <jacob.jun.pan@intel.com>,
Jean-Philippe Brucker <jean-philippe.brucker@arm.com>,
"Liu, Yi L" <yi.l.liu@intel.com>,
"Sun, Yi Y" <yi.y.sun@intel.com>,
"peterx@redhat.com" <peterx@redhat.com>,
"Bie, Tiwei" <tiwei.bie@intel.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [RFC PATCH v2 00/10] vfio/mdev: IOMMU aware mediated device
Date: Wed, 5 Sep 2018 03:01:39 +0000 [thread overview]
Message-ID: <AADFC41AFE54684AB9EE6CBC0274A5D1912F128F@SHSMSX101.ccr.corp.intel.com> (raw)
In-Reply-To: <20180830040922.30426-1-baolu.lu@linux.intel.com>
> From: Lu Baolu [mailto:baolu.lu@linux.intel.com]
> Sent: Thursday, August 30, 2018 12:09 PM
>
[...]
>
> In order to distinguish the IOMMU-capable mediated devices from those
> which still need to rely on parent devices, this patch set adds a
> domain type attribute to each mdev.
>
> enum mdev_domain_type {
> DOMAIN_TYPE_NO_IOMMU, /* Don't need any IOMMU support.
> * All isolation and protection
> * are handled by the parent
> * device driver with a device
> * specific mechanism.
> */
> DOMAIN_TYPE_ATTACH_PARENT, /* IOMMU can isolate and
> protect
> * the mdev, and the isolation
> * domain should be attaced with
> * the parent device.
> */
> };
>
ATTACH_PARENT is not like a good counterpart to NO_IOMMU.
what about DOMAIN_TYPE_NO_IOMMU/DOMAIN_TYPE_IOMMU? whether
to attach parent device is just internal logic.
Alternatively DOMAIN_TYPE_SOFTWARE/DOMAIN_TYPE_HARDWARE,
where software means iommu_domain is managed by software while
the other means managed by hardware.
One side note to Alex - with multiple domain extension in IOMMU layer,
this version combines IOMMU-capable usages in VFIO: PASID-based (as
in scalable iov) and RID-based (as the usage of mdev wrapper on any
device). Both cases share the common path - just binding the domain to the
parent device of mdev. IOMMU layer will handle two cases differently later.
Thanks
Kevin
next prev parent reply other threads:[~2018-09-05 3:01 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-30 4:09 [RFC PATCH v2 00/10] vfio/mdev: IOMMU aware mediated device Lu Baolu
2018-08-30 4:09 ` [RFC PATCH v2 01/10] iommu: Add APIs for multiple domains per device Lu Baolu
2018-08-30 4:09 ` [RFC PATCH v2 02/10] iommu/vt-d: Add multiple domains per device query Lu Baolu
2018-09-05 19:35 ` Alex Williamson
2018-09-06 0:54 ` Lu Baolu
2018-08-30 4:09 ` [RFC PATCH v2 03/10] iommu/amd: Add default branch in amd_iommu_capable() Lu Baolu
2018-09-05 19:37 ` Alex Williamson
2018-09-06 0:55 ` Lu Baolu
2018-08-30 4:09 ` [RFC PATCH v2 04/10] iommu/vt-d: Enable/disable multiple domains per device Lu Baolu
2018-08-30 4:09 ` [RFC PATCH v2 05/10] iommu/vt-d: Attach/detach domains in auxiliary mode Lu Baolu
2018-08-30 4:09 ` [RFC PATCH v2 06/10] iommu/vt-d: Return ID associated with an auxiliary domain Lu Baolu
2018-08-30 4:09 ` [RFC PATCH v2 07/10] vfio/mdev: Add mediated device domain type Lu Baolu
2018-08-30 4:09 ` [RFC PATCH v2 08/10] vfio/type1: Add domain at(de)taching group helpers Lu Baolu
2018-09-10 16:23 ` Jean-Philippe Brucker
2018-09-12 5:02 ` Lu Baolu
2018-09-12 17:54 ` Jean-Philippe Brucker
2018-09-13 0:35 ` Tian, Kevin
2018-09-14 14:45 ` Jean-Philippe Brucker
2018-09-15 2:36 ` Tian, Kevin
2018-09-18 15:52 ` Jean-Philippe Brucker
[not found] ` <AADFC41AFE54684AB9EE6CBC0274A5D19130EAD7@SHSMSX101.ccr.corp.intel.com>
2018-09-19 2:10 ` Lu Baolu
2018-09-25 17:55 ` Jean-Philippe Brucker
2018-09-26 2:11 ` Lu Baolu
2018-08-30 4:09 ` [RFC PATCH v2 09/10] vfio/type1: Determine domain type of an mdev group Lu Baolu
2018-08-30 4:09 ` [RFC PATCH v2 10/10] vfio/type1: Attach domain for " Lu Baolu
2018-09-05 3:01 ` Tian, Kevin [this message]
2018-09-05 19:15 ` [RFC PATCH v2 00/10] vfio/mdev: IOMMU aware mediated device Alex Williamson
2018-09-06 1:29 ` Lu Baolu
2018-09-10 16:22 ` Jean-Philippe Brucker
2018-09-12 2:42 ` Lu Baolu
2018-09-12 17:54 ` Jean-Philippe Brucker
2018-09-13 0:19 ` Tian, Kevin
2018-09-13 15:03 ` Jean-Philippe Brucker
2018-09-13 16:55 ` Raj, Ashok
2018-09-14 14:39 ` Jean-Philippe Brucker
[not found] ` <AADFC41AFE54684AB9EE6CBC0274A5D191302ECE@SHSMSX101.ccr.corp.intel.com>
2018-09-14 14:40 ` Jean-Philippe Brucker
2018-09-14 21:04 ` Jacob Pan
2018-09-18 15:46 ` Jean-Philippe Brucker
2018-09-19 2:22 ` Tian, Kevin
2018-09-20 15:53 ` Jacob Pan
2018-09-14 2:46 ` Lu Baolu
2018-09-14 2:53 ` Tian, Kevin
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