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[35.198.224.169]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2fe6a43ccb3sm1861445a91.39.2025.02.25.09.52.22 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 25 Feb 2025 09:52:26 -0800 (PST) Date: Tue, 25 Feb 2025 17:52:16 +0000 From: Pranjal Shrivastava To: Nicolin Chen Cc: jgg@nvidia.com, kevin.tian@intel.com, corbet@lwn.net, will@kernel.org, joro@8bytes.org, suravee.suthikulpanit@amd.com, robin.murphy@arm.com, dwmw2@infradead.org, baolu.lu@linux.intel.com, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, linux-doc@vger.kernel.org, eric.auger@redhat.com, jean-philippe@linaro.org, mdf@kernel.org, mshavit@google.com, shameerali.kolothum.thodi@huawei.com, smostafa@google.com, ddutile@redhat.com, yi.l.liu@intel.com, patches@lists.linux.dev Subject: Re: [PATCH v8 12/14] iommu/arm-smmu-v3: Introduce struct arm_smmu_vmaster Message-ID: References: Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Tue, Feb 25, 2025 at 09:25:40AM -0800, Nicolin Chen wrote: > Use it to store all vSMMU-related data. The vsid (Virtual Stream ID) will > be the first use case. Since the vsid reader will be the eventq handler > that already holds a streams_mutex, reuse that to fenche the vmaster too. > > Also add a pair of arm_smmu_attach_prepare/commit_vmaster helpers to set > or unset the master->vmaster point. Put these helpers inside the existing > arm_smmu_attach_prepare/commit(). > > For identity/blocked ops that don't call arm_smmu_attach_prepare/commit(), > add a simpler arm_smmu_master_clear_vmaster helper to unset the vmaster. > > Reviewed-by: Jason Gunthorpe > Reviewed-by: Pranjal Shrivastavat > Signed-off-by: Nicolin Chen > --- > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 28 ++++++++++++ > .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 45 +++++++++++++++++++ > drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 18 +++++++- > 3 files changed, 90 insertions(+), 1 deletion(-) > Apologies for my spelling error in [1]. It's supposed to be: Reviewed-by: Pranjal Shrivastava For all the other patches too. Correct spelling in [2]. Thanks, Praan [1] https://lore.kernel.org/all/Z73zvIbsXzJMCaNt@google.com/ [2] https://lore.kernel.org/all/Z730M3XptvDRObBp@google.com/