linux-kernel - RE: [PATCH v2 1/1] iommu/vt-d: Remove unnecessary SVA data accesses in page fault path

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Message-ID: <BN9PR11MB527614562B2EC7694A7C838C8C499@BN9PR11MB5276.namprd11.prod.outlook.com>
Date:   Thu, 15 Sep 2022 03:24:12 +0000
From:   "Tian, Kevin" <kevin.tian@...el.com>
To:     Lu Baolu <baolu.lu@...ux.intel.com>,
        "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>
CC:     Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        "Robin Murphy" <robin.murphy@....com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH v2 1/1] iommu/vt-d: Remove unnecessary SVA data accesses
 in page fault path

> From: Lu Baolu <baolu.lu@...ux.intel.com>
> Sent: Wednesday, September 14, 2022 9:18 AM
> 
> The existing I/O page fault handling code accesses the per-PASID SVA data
> structures. This is unnecessary and makes the fault handling code only
> suitable for SVA scenarios. This removes the SVA data accesses from the
> I/O page fault reporting and responding code, so that the fault handling
> code could be generic.
> 
> Signed-off-by: Lu Baolu <baolu.lu@...ux.intel.com>

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