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Date: Wed, 24 May 2023 11:14:29 +0530
From: Vinod Koul <vkoul@kernel.org>
To: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: LKML <linux-kernel@vger.kernel.org>, iommu@lists.linux.dev,
	Jason Gunthorpe <jgg@nvidia.com>,
	Lu Baolu <baolu.lu@linux.intel.com>, Joerg Roedel <joro@8bytes.org>,
	Robin Murphy <robin.murphy@arm.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.com>,
	dmaengine@vger.kernel.org, Will Deacon <will@kernel.org>,
	David Woodhouse <dwmw2@infradead.org>,
	Raj Ashok <ashok.raj@intel.com>,
	"Tian, Kevin" <kevin.tian@intel.com>, Yi Liu <yi.l.liu@intel.com>,
	"Yu, Fenghua" <fenghua.yu@intel.com>,
	Dave Jiang <dave.jiang@intel.com>, Tony Luck <tony.luck@intel.com>,
	"Zanussi, Tom" <tom.zanussi@intel.com>,
	narayan.ranganathan@intel.com
Subject: Re: [PATCH v7 4/4] dmaengine/idxd: Re-enable kernel workqueue under
 DMA API
Message-ID: <ZG2kPbwMmW4B2PFB@matsya>
References: <20230523173451.2932113-1-jacob.jun.pan@linux.intel.com>
 <20230523173451.2932113-5-jacob.jun.pan@linux.intel.com>
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In-Reply-To: <20230523173451.2932113-5-jacob.jun.pan@linux.intel.com>

On 23-05-23, 10:34, Jacob Pan wrote:
> Kernel workqueues were disabled due to flawed use of kernel VA and SVA
> API. Now that we have the support for attaching PASID to the device's
> default domain and the ability to reserve global PASIDs from SVA APIs,
> we can re-enable the kernel work queues and use them under DMA API.
> 
> We also use non-privileged access for in-kernel DMA to be consistent
> with the IOMMU settings. Consequently, interrupt for user privilege is
> enabled for work completion IRQs.

Acked-by: Vinod Koul <vkoul@kernel.org>

-- 
~Vinod