linux-kernel - Re: [PATCH v2 1/1] iommu/vt-d: Drain PRQs when domain removed from RID

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Message-ID: <76d4ab22-c3b9-47d8-9bb8-0430be05fee0@linux.intel.com>
Date: Sat, 2 Nov 2024 11:16:31 +0800
From: Baolu Lu <baolu.lu@...ux.intel.com>
To: iommu@...ts.linux.dev
Cc: baolu.lu@...ux.intel.com, Joerg Roedel <joro@...tes.org>,
 Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
 Joel Granados <joel.granados@...nel.org>, Jason Gunthorpe <jgg@...pe.ca>,
 Kevin Tian <kevin.tian@...el.com>, Yi Liu <yi.l.liu@...el.com>,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/1] iommu/vt-d: Drain PRQs when domain removed from
 RID

On 2024/11/1 12:55, Lu Baolu wrote:
> As this iommu driver now supports page faults for requests without
> PASID, page requests should be drained when a domain is removed from
> the RID2PASID entry.
> 
> This results in the intel_iommu_drain_pasid_prq() call being moved to
> intel_pasid_tear_down_entry(). This indicates that when a translation
> is removed from any PASID entry and the PRI has been enabled on the
> device, page requests are drained in the domain detachment path.
> 
> The intel_iommu_drain_pasid_prq() helper has been modified to support
> sending device TLB invalidation requests for both PASID and non-PASID
> cases.
> 
> Signed-off-by: Lu Baolu<baolu.lu@...ux.intel.com>
> ---
>   drivers/iommu/intel/iommu.c |  1 -
>   drivers/iommu/intel/pasid.c |  1 +
>   drivers/iommu/intel/prq.c   | 26 +++++++++-----------------
>   3 files changed, 10 insertions(+), 18 deletions(-)

Queued for v6.13.

--
baolu