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From:   "Tian, Kevin" <kevin.tian@intel.com>
To:     Lu Baolu <baolu.lu@linux.intel.com>,
        "iommu@lists.linux.dev" <iommu@lists.linux.dev>,
        "dmaengine@vger.kernel.org" <dmaengine@vger.kernel.org>
CC:     Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
        "Robin Murphy" <robin.murphy@arm.com>,
        "Yu, Fenghua" <fenghua.yu@intel.com>,
        "Jiang, Dave" <dave.jiang@intel.com>,
        Vinod Koul <vkoul@kernel.org>,
        Jacob Pan <jacob.jun.pan@linux.intel.com>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: RE: [PATCH v3 2/6] iommu/vt-d: Allow SVA with device-specific IOPF
Thread-Topic: [PATCH v3 2/6] iommu/vt-d: Allow SVA with device-specific IOPF
Thread-Index: AQHZXkiEefsRd7HM6EGRMsgoY+CBt68PeGHg
Date:   Tue, 28 Mar 2023 02:10:49 +0000
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References: <20230324120234.313643-1-baolu.lu@linux.intel.com>
 <20230324120234.313643-3-baolu.lu@linux.intel.com>
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> From: Lu Baolu <baolu.lu@linux.intel.com>
> Sent: Friday, March 24, 2023 8:03 PM
>=20
> Currently enabling SVA requires IOPF support from the IOMMU and device
> PCI PRI. However, some devices can handle IOPF by itself without ever
> sending PCI page requests nor advertising PRI capability.
>=20
> Allow SVA support with IOPF handled either by IOMMU (PCI PRI) or device
> driver (device-specific IOPF). As long as IOPF could be handled, SVA
> should continue to work.
>=20
> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>

Reviewed-by: Kevin Tian <kevin.tian@intel.com>