From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: "Jiang, Dave" <dave.jiang@intel.com>,
"Raj, Ashok" <ashok.raj@intel.com>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Cornelia Huck <cohuck@redhat.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Alex Williamson <alex.williamson@redhat.com>,
Robin Murphy <robin.murphy@arm.com>
Subject: Re: [PATCH v6 2/5] iommu: Use bus iommu ops for aux related callback
Date: Fri, 30 Oct 2020 11:47:20 +0100 [thread overview]
Message-ID: <20201030104720.GA294997@myrica> (raw)
In-Reply-To: <MWHPR11MB1645D795F7851F5894CB58D88C150@MWHPR11MB1645.namprd11.prod.outlook.com>
On Fri, Oct 30, 2020 at 05:55:53AM +0000, Tian, Kevin wrote:
> > From: Lu Baolu <baolu.lu@linux.intel.com>
> > Sent: Friday, October 30, 2020 12:58 PM
> >
> > The aux-domain apis were designed for macro driver where the subdevices
> > are created and used inside a device driver. Use the device's bus iommu
> > ops instead of that in iommu domain for various callbacks.
>
> IIRC there are only two users on these apis. One is VFIO, and the other
> is on the ARM side (not checked in yet). Jean, can you help confirm
> whether ARM-side usage still relies on aux apis even with this change?
No, I have something out of tree but no plan to upstream it anymore, and
the SMMUv2 implementation is out as well:
https://lore.kernel.org/linux-iommu/20200713173556.GC3815@jcrouse1-lnx.qualcomm.com/
> If no, possibly they can be removed completely?
No objection from me. They can be added back later (I still belive adding
PASID to the DMA API would be nice to have once more HW implements it).
Thanks,
Jean
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next prev parent reply other threads:[~2020-10-30 10:47 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-30 4:58 [PATCH v6 0/5] iommu aux-domain APIs extensions Lu Baolu
2020-10-30 4:58 ` [PATCH v6 1/5] vfio/mdev: Register mdev bus earlier during boot Lu Baolu
2020-10-30 17:02 ` Alex Williamson
2020-10-30 4:58 ` [PATCH v6 2/5] iommu: Use bus iommu ops for aux related callback Lu Baolu
2020-10-30 5:55 ` Tian, Kevin
2020-10-30 10:47 ` Jean-Philippe Brucker [this message]
2020-10-30 4:58 ` [PATCH v6 3/5] iommu/vt-d: Make some static functions global Lu Baolu
2020-10-30 4:58 ` [PATCH v6 4/5] iommu/vt-d: Add iommu_ops support for subdevice bus Lu Baolu
2020-10-30 6:13 ` Tian, Kevin
2020-10-30 20:56 ` Alex Williamson
2020-10-30 4:58 ` [PATCH v6 5/5] vfio/type1: Use mdev bus iommu_ops for IOMMU callbacks Lu Baolu
2020-10-30 6:16 ` Tian, Kevin
2020-10-30 21:06 ` Alex Williamson
2020-11-03 5:22 ` Lu Baolu
2020-11-12 2:31 ` Lu Baolu
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