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[142.162.112.119]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-8953c057751sm6602716d6.43.2026.02.05.16.43.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 05 Feb 2026 16:43:25 -0800 (PST) Received: from jgg by wakko with local (Exim 4.97) (envelope-from ) id 1vo9wT-000000041DZ-0JDt; Thu, 05 Feb 2026 20:43:25 -0400 Date: Thu, 5 Feb 2026 20:43:25 -0400 From: Jason Gunthorpe To: Zhenzhong Duan Cc: linux-kernel@vger.kernel.org, iommu@lists.linux.dev, dwmw2@infradead.org, baolu.lu@linux.intel.com, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, kevin.tian@intel.com Subject: Re: [PATCH 0/3] iommupt/vtd: Support dirty tracking on PASID Message-ID: <20260206004325.GB943673@ziepe.ca> References: <20260205023405.41583-1-zhenzhong.duan@intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260205023405.41583-1-zhenzhong.duan@intel.com> On Wed, Feb 04, 2026 at 09:34:01PM -0500, Zhenzhong Duan wrote: > Hi, > > When we add pasid support in QEMU for passthrough device, we found > PASID attachment to a nested parent domain with dirty tracking failed. > > It's because PASID-level dirty tracking is not there yet, by adding it, > we can enable PASID attachment to such domain. > > Thanks > Zhenzhong > > > Zhenzhong Duan (3): > iommupt/vtd: Pass dmar_domain pointer to device_set_dirty_tracking() > iommupt/vtd: Support dirty tracking on PASID > iommufd/selftest: Test dirty tracking on PASID I'm not sure why you marked this s iommupt? It isn't right? Also only the second stage table supports dirty tracking so I'm confused what is the issue? Is it trying to say that if a second stage is written to a pasid entry on a !=0 pasid path it doesn't work right? But it does work on a 0 pasid? Huh? That sounds like a systemic problem, the two flows shouldn't actually be any different. Jason