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[34.124.129.10]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2ccc9bdb775sm116995885ad.2.2026.07.14.06.07.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 14 Jul 2026 06:07:03 -0700 (PDT) Date: Tue, 14 Jul 2026 13:06:57 +0000 From: Pranjal Shrivastava To: Nicolin Chen Cc: Will Deacon , Jason Gunthorpe , Kevin Tian , Lu Baolu , Robin Murphy , joro@8bytes.org, David Woodhouse , linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 3/5] iommufd/selftest: Convert cache invalidation mocks to the core array loop Message-ID: References: <4383c0afeba9795c9ae312826443fd7d5fc3fb58.1783539724.git.nicolinc@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4383c0afeba9795c9ae312826443fd7d5fc3fb58.1783539724.git.nicolinc@nvidia.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260714_060705_395688_6C3B05D9 X-CRM114-Status: GOOD ( 14.57 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jul 08, 2026 at 12:44:18PM -0700, Nicolin Chen wrote: > The vIOMMU and the nested-domain selftest invalidation mocks each used to > walk the whole request array on their own, with the vIOMMU mock even > allocating a buffer sized to the entire array in order to do so first. > > The iommufd core now iterates the request array itself and re-invokes the > op with the not-yet-handled sub-array, so handle just a single request per > call out of the front of that sub-array and report one handled entry via > the array->entry_num. Drop both of the loops and the kzalloc_objs() in the > viommu callback function, and keep returning a success for an empty array > as a probe of the selftest data type. > > Reviewed-by: Kevin Tian > Assisted-by: Claude:claude-opus-4-8 > Signed-off-by: Nicolin Chen Reviewed-by: Pranjal Shrivastava Thanks, Praan