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([2a01:e0a:f0e:9070:527b:9dff:feef:3874]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-2aba87d7b9dsm56031890eec.4.2025.12.09.02.18.56 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 09 Dec 2025 02:19:01 -0800 (PST) Message-ID: <69e9ac12-596d-415a-a669-980ba67d22ba@redhat.com> Date: Tue, 9 Dec 2025 11:18:53 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/4] vEVENTQ support for accelerated SMMUv3 devices Content-Language: en-US To: Shameer Kolothum , qemu-arm@nongnu.org, qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, nicolinc@nvidia.com, nathanc@nvidia.com, mochs@nvidia.com, jgg@nvidia.com, jonathan.cameron@huawei.com, zhangfei.gao@linaro.org, zhenzhong.duan@intel.com, kjaju@nvidia.com References: <20251204092245.5157-1-skolothumtho@nvidia.com> From: Eric Auger In-Reply-To: <20251204092245.5157-1-skolothumtho@nvidia.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Received-SPF: pass client-ip=170.10.133.124; envelope-from=eric.auger@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: eric.auger@redhat.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 12/4/25 10:22 AM, Shameer Kolothum wrote: > Hi, > > Changes from RFC v1: > https://lore.kernel.org/qemu-devel/20251105154657.37386-1-skolothumtho@nvidia.com/ > > -Rebased on v6[0] of the "accelerated SMMUv3" series > -Addressed feedback on the RFC. Thanks! > -Dropped the RFC tag as the accelerated series is now more mature, and once > that lands, it makes sense to pick this up as well since it enables the > delivery of SMMUv3 events to the guest. > > When accel=on is enabled for an SMMUv3 instance, the host hardware SMMUv3 > may generate Stage-1 (S1) fault or event notifications that are intended > for the vIOMMU instance in userspace. > > This series adds QEMU support for receiving such host events through the > vEVENTQ interface and propagating them to the guest. The implementation > uses the vEVENTQ support provided by the IOMMUFD subsystem in the kernel. > > I have lightly this on a Grace platform using some hacks to generate fault tested Eric > events. Further testing and feedback are welcome. > > Thanks, > Shameer > > [0]https://lore.kernel.org/qemu-devel/20251120132213.56581-1-skolothumtho@nvidia.com/ > > Nicolin Chen (2): > backends/iommufd: Introduce iommufd_backend_alloc_veventq > hw/arm/smmuv3-accel: Allocate vEVENTQ for accelerated SMMUv3 devices > > Shameer Kolothum (2): > hw/arm/smmuv3: Introduce a helper function for event propagation > hw/arm/smmuv3-accel: Read and propagate host vIOMMU events > > backends/iommufd.c | 31 ++++++++++ > backends/trace-events | 1 + > hw/arm/smmuv3-accel.c | 120 ++++++++++++++++++++++++++++++++++++++- > hw/arm/smmuv3-accel.h | 8 +++ > hw/arm/smmuv3-internal.h | 4 ++ > hw/arm/smmuv3.c | 25 ++++++-- > hw/arm/trace-events | 2 +- > include/system/iommufd.h | 12 ++++ > 8 files changed, 195 insertions(+), 8 deletions(-) >