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Message-ID: <fa434d32-994f-7c72-6d69-8630d6d2033f@linux.intel.com>
Date:   Tue, 4 Apr 2023 13:19:08 +0800
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Cc:     baolu.lu@linux.intel.com, Joerg Roedel <joro@8bytes.org>,
        Will Deacon <will@kernel.org>,
        Robin Murphy <robin.murphy@arm.com>,
        Kevin Tian <kevin.tian@intel.com>,
        Fenghua Yu <fenghua.yu@intel.com>,
        Vinod Koul <vkoul@kernel.org>,
        Jacob Pan <jacob.jun.pan@linux.intel.com>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH v3 1/6] dmaengine: idxd: Add enable/disable device IOPF
 feature
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To:     Dave Jiang <dave.jiang@intel.com>, iommu@lists.linux.dev,
        dmaengine@vger.kernel.org
References: <20230324120234.313643-1-baolu.lu@linux.intel.com>
 <20230324120234.313643-2-baolu.lu@linux.intel.com>
 <f6445aed-bf35-7245-3d52-336ebe11a866@linux.intel.com>
 <cea7d7ff-bf03-eb7d-a836-b51b9addef5b@intel.com>
From:   Baolu Lu <baolu.lu@linux.intel.com>
In-Reply-To: <cea7d7ff-bf03-eb7d-a836-b51b9addef5b@intel.com>
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On 4/4/23 12:57 AM, Dave Jiang wrote:
> On 4/2/23 10:49 PM, Baolu Lu wrote:
>> On 3/24/23 8:02 PM, Lu Baolu wrote:
>>> The iommu subsystem requires IOMMU_DEV_FEAT_IOPF must be enabled before
>>> and disabled after IOMMU_DEV_FEAT_SVA, if device's I/O page faults rely
>>> on the IOMMU. Add explicit IOMMU_DEV_FEAT_IOPF enabling/disabling in 
>>> this
>>> driver.
>>>
>>> At present, missing IOPF enabling/disabling doesn't cause any real 
>>> issue,
>>> because the IOMMU driver places the IOPF enabling/disabling in the path
>>> of SVA feature handling. But this may change.
>>>
>>> Reviewed-by: Dave Jiang<dave.jiang@intel.com>
>>> Reviewed-by: Fenghua Yu<fenghua.yu@intel.com>
>>> Reviewed-by: Kevin Tian<kevin.tian@intel.com>
>>> Signed-off-by: Lu Baolu<baolu.lu@linux.intel.com>
>>
>> Hi Dave and Fenghua,
>>
>> The following iommu patches depends on this one. Can I route it to
>> Linus through the iommu tree?
> 
> Hi Baolu, you'll need an ack from Vinod, who is the dmaengine subsystem 
> maintainer. I have no objections.

Hi Vinod,

Does this work work for you?

Best regards,
baolu