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([2a01:e0a:f0e:9070:527b:9dff:feef:3874]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4835bc7b986sm42324555e9.17.2026.02.12.06.44.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 12 Feb 2026 06:44:35 -0800 (PST) Message-ID: Date: Thu, 12 Feb 2026 15:44:33 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 05/24] hw/arm/smmuv3-accel: Introduce CMDQV ops interface To: Shameer Kolothum , qemu-arm@nongnu.org, qemu-devel@nongnu.org Cc: peter.maydell@linaro.org, clg@redhat.com, alex@shazbot.org, nicolinc@nvidia.com, nathanc@nvidia.com, mochs@nvidia.com, jan@nvidia.com, jgg@nvidia.com, jonathan.cameron@huawei.com, zhangfei.gao@linaro.org, zhenzhong.duan@intel.com, kjaju@nvidia.com References: <20260206144823.80655-1-skolothumtho@nvidia.com> <20260206144823.80655-6-skolothumtho@nvidia.com> From: Eric Auger In-Reply-To: <20260206144823.80655-6-skolothumtho@nvidia.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: 7gX5-waYpj8L6UQa7BC2E9crp2LboPVp6VeFCc7UpMw_1770907476 X-Mimecast-Originator: redhat.com Content-Language: en-US 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_H2=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=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-arm@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-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org Sender: qemu-arm-bounces+qemu-arm=archiver.kernel.org@nongnu.org On 2/6/26 3:48 PM, Shameer Kolothum wrote: > CMDQ-Virtualization (CMDQV) is a hardware extension to SMMUv3 that enables > virtualization of multiple command queues (VCMDQs). > > CMDQV support is a specialization of the IOMMUFD backed accelerated > SMMUv3 path. Introduce an ops interface to factor CMDQV specific > initialization and CMDQV vIOMMU/vEVENTQ allocation behavior out of > the base implementation. The ops pointer and associated state are > stored in the accelerated SMMUv3 state. > > No functional change > > Signed-off-by: Shameer Kolothum > --- > hw/arm/smmuv3-accel.h | 19 +++++++++++++++++++ > 1 file changed, 19 insertions(+) > > diff --git a/hw/arm/smmuv3-accel.h b/hw/arm/smmuv3-accel.h > index c9c10e55c3..ca087240e5 100644 > --- a/hw/arm/smmuv3-accel.h > +++ b/hw/arm/smmuv3-accel.h > @@ -16,6 +16,23 @@ > #endif > #include CONFIG_DEVICES > > +/* > + * CMDQ-Virtualization (CMDQV) hardware support, extends the SMMUv3 to > + * support multiple VCMDQs with virtualization capabilities. > + * CMDQV specific behavior is factored behind this ops interface. > + */ > +typedef struct SMMUv3AccelCmdqvOps { > + bool (*init)(SMMUv3State *s, Error **errp); > + bool (*alloc_viommu)(SMMUv3State *s, > + HostIOMMUDeviceIOMMUFD *idev, > + uint32_t *out_viommu_id, > + Error **errp); > + void (*free_viommu)(SMMUv3State *s); > + bool (*alloc_veventq)(SMMUv3State *s, Error **errp); > + void (*free_veventq)(SMMUv3State *s); > + void (*reset)(SMMUv3State *s); > +} SMMUv3AccelCmdqvOps; > + > /* > * Represents an accelerated SMMU instance backed by an iommufd vIOMMU object. > * Holds bypass and abort proxy HWPT IDs used for device attachment. > @@ -28,6 +45,8 @@ typedef struct SMMUv3AccelState { > uint32_t bypass_hwpt_id; > uint32_t abort_hwpt_id; > QLIST_HEAD(, SMMUv3AccelDevice) device_list; > + const SMMUv3AccelCmdqvOps *cmdqv_ops; > + void *cmdqv; effectively looks duplucate, check !cmdqv_ops ? Eric > } SMMUv3AccelState; > > typedef struct SMMUS1Hwpt {