[{"id":3673045,"web_url":"http://patchwork.ozlabs.org/comment/3673045/","msgid":"<51644344-1805-4809-831d-77663d181d83@redhat.com>","list_archive_url":null,"date":"2026-04-03T09:34:56","subject":"Re: [PATCH v3 02/14] iommufd: Extend attach/detach_hwpt callbacks to\n support pasid","submitter":{"id":85406,"url":"http://patchwork.ozlabs.org/api/people/85406/","name":"Cédric Le Goater","email":"clg@redhat.com"},"content":"On 4/3/26 05:55, Zhenzhong Duan wrote:\n> Same for the two wrappers and their call sites.\n> \n> Suggested-by: Shameer Kolothum Thodi \n> Suggested-by: Nicolin Chen \n> Signed-off-by: Zhenzhong Duan \n> Reviewed-by: Yi Liu \n> Reviewed-by: Nicolin Chen \n> Tested-by: Xudong Hao \n\nReviewed-by: Cédric Le Goater \n\nThanks,\n\nC.\n\n\n\n> ---\n> include/system/iommufd.h | 16 +++++++++++-----\n> backends/iommufd.c | 9 +++++----\n> hw/arm/smmuv3-accel.c | 12 ++++++++----\n> hw/i386/intel_iommu_accel.c | 19 ++++++++++---------\n> hw/vfio/iommufd.c | 10 +++++-----\n> 5 files changed, 39 insertions(+), 27 deletions(-)\n> \n> diff --git a/include/system/iommufd.h b/include/system/iommufd.h\n> index 2925d116ac..da98e79439 100644\n> --- a/include/system/iommufd.h\n> +++ b/include/system/iommufd.h\n> @@ -138,14 +138,16 @@ struct HostIOMMUDeviceIOMMUFDClass {\n> *\n> * @hiodi: host IOMMU device backed by IOMMUFD backend.\n> *\n> + * @pasid: target pasid of the device to be attached.\n> + *\n> * @hwpt_id: ID of IOMMUFD hardware page table.\n> *\n> * @errp: pass an Error out when attachment fails.\n> *\n> * Returns: true on success, false on failure.\n> */\n> - bool (*attach_hwpt)(HostIOMMUDeviceIOMMUFD *hiodi, uint32_t hwpt_id,\n> - Error **errp);\n> + bool (*attach_hwpt)(HostIOMMUDeviceIOMMUFD *hiodi, uint32_t pasid,\n> + uint32_t hwpt_id, Error **errp);\n> /**\n> * @detach_hwpt: detach host IOMMU device from IOMMUFD hardware page table.\n> * VFIO and VDPA device can have different implementation.\n> @@ -154,15 +156,19 @@ struct HostIOMMUDeviceIOMMUFDClass {\n> *\n> * @hiodi: host IOMMU device backed by IOMMUFD backend.\n> *\n> + * @pasid: target pasid of the device to be detached.\n> + *\n> * @errp: pass an Error out when attachment fails.\n> *\n> * Returns: true on success, false on failure.\n> */\n> - bool (*detach_hwpt)(HostIOMMUDeviceIOMMUFD *hiodi, Error **errp);\n> + bool (*detach_hwpt)(HostIOMMUDeviceIOMMUFD *hiodi, uint32_t pasid,\n> + Error **errp);\n> };\n> \n> bool host_iommu_device_iommufd_attach_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,\n> - uint32_t hwpt_id, Error **errp);\n> -bool host_iommu_device_iommufd_detach_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,\n> + uint32_t pasid, uint32_t hwpt_id,\n> Error **errp);\n> +bool host_iommu_device_iommufd_detach_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,\n> + uint32_t pasid, Error **errp);\n> #endif\n> diff --git a/backends/iommufd.c b/backends/iommufd.c\n> index 410b044370..cfde6f2b2c 100644\n> --- a/backends/iommufd.c\n> +++ b/backends/iommufd.c\n> @@ -539,23 +539,24 @@ bool iommufd_backend_alloc_veventq(IOMMUFDBackend *be, uint32_t viommu_id,\n> }\n> \n> bool host_iommu_device_iommufd_attach_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,\n> - uint32_t hwpt_id, Error **errp)\n> + uint32_t pasid, uint32_t hwpt_id,\n> + Error **errp)\n> {\n> HostIOMMUDeviceIOMMUFDClass *hiodic =\n> HOST_IOMMU_DEVICE_IOMMUFD_GET_CLASS(hiodi);\n> \n> g_assert(hiodic->attach_hwpt);\n> - return hiodic->attach_hwpt(hiodi, hwpt_id, errp);\n> + return hiodic->attach_hwpt(hiodi, pasid, hwpt_id, errp);\n> }\n> \n> bool host_iommu_device_iommufd_detach_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,\n> - Error **errp)\n> + uint32_t pasid, Error **errp)\n> {\n> HostIOMMUDeviceIOMMUFDClass *hiodic =\n> HOST_IOMMU_DEVICE_IOMMUFD_GET_CLASS(hiodi);\n> \n> g_assert(hiodic->detach_hwpt);\n> - return hiodic->detach_hwpt(hiodi, errp);\n> + return hiodic->detach_hwpt(hiodi, pasid, errp);\n> }\n> \n> static int hiod_iommufd_get_cap(HostIOMMUDevice *hiod, int cap, Error **errp)\n> diff --git a/hw/arm/smmuv3-accel.c b/hw/arm/smmuv3-accel.c\n> index 3630078751..3201bb25af 100644\n> --- a/hw/arm/smmuv3-accel.c\n> +++ b/hw/arm/smmuv3-accel.c\n> @@ -300,7 +300,8 @@ bool smmuv3_accel_install_ste(SMMUv3State *s, SMMUDevice *sdev, int sid,\n> return false;\n> }\n> \n> - if (!host_iommu_device_iommufd_attach_hwpt(hiodi, hwpt_id, errp)) {\n> + if (!host_iommu_device_iommufd_attach_hwpt(hiodi, IOMMU_NO_PASID, hwpt_id,\n> + errp)) {\n> if (s1_hwpt) {\n> iommufd_backend_free_id(hiodi->iommufd, s1_hwpt->hwpt_id);\n> g_free(s1_hwpt);\n> @@ -575,7 +576,8 @@ smmuv3_accel_alloc_viommu(SMMUv3State *s, HostIOMMUDeviceIOMMUFD *hiodi,\n> \n> /* Attach a HWPT based on SMMUv3 GBPA.ABORT value */\n> hwpt_id = smmuv3_accel_gbpa_hwpt(s, accel);\n> - if (!host_iommu_device_iommufd_attach_hwpt(hiodi, hwpt_id, errp)) {\n> + if (!host_iommu_device_iommufd_attach_hwpt(hiodi, IOMMU_NO_PASID, hwpt_id,\n> + errp)) {\n> goto free_veventq;\n> }\n> return true;\n> @@ -665,7 +667,8 @@ static void smmuv3_accel_unset_iommu_device(PCIBus *bus, void *opaque,\n> hiodi = accel_dev->hiodi;\n> accel = accel_dev->s_accel;\n> /* Re-attach the default s2 hwpt id */\n> - if (!host_iommu_device_iommufd_attach_hwpt(hiodi, hiodi->hwpt_id, NULL)) {\n> + if (!host_iommu_device_iommufd_attach_hwpt(hiodi, IOMMU_NO_PASID,\n> + hiodi->hwpt_id, NULL)) {\n> error_report(\"Unable to attach the default HW pagetable: hiodi devid \"\n> \"0x%x\", hiodi->devid);\n> }\n> @@ -879,7 +882,8 @@ bool smmuv3_accel_attach_gbpa_hwpt(SMMUv3State *s, Error **errp)\n> \n> hwpt_id = smmuv3_accel_gbpa_hwpt(s, accel);\n> QLIST_FOREACH(accel_dev, &accel->device_list, next) {\n> - if (!host_iommu_device_iommufd_attach_hwpt(accel_dev->hiodi, hwpt_id,\n> + if (!host_iommu_device_iommufd_attach_hwpt(accel_dev->hiodi,\n> + IOMMU_NO_PASID, hwpt_id,\n> &local_err)) {\n> error_append_hint(&local_err, \"Failed to attach GBPA hwpt %u for \"\n> \"hiodi devid %u\", hwpt_id,\n> diff --git a/hw/i386/intel_iommu_accel.c b/hw/i386/intel_iommu_accel.c\n> index ed3793602b..3217a2afac 100644\n> --- a/hw/i386/intel_iommu_accel.c\n> +++ b/hw/i386/intel_iommu_accel.c\n> @@ -121,8 +121,9 @@ static bool vtd_device_attach_iommufd(VTDHostIOMMUDevice *vtd_hiod,\n> }\n> }\n> \n> - ret = host_iommu_device_iommufd_attach_hwpt(hiodi, hwpt_id, errp);\n> - trace_vtd_device_attach_hwpt(hiodi->devid, vtd_as->pasid, hwpt_id, ret);\n> + ret = host_iommu_device_iommufd_attach_hwpt(hiodi, IOMMU_NO_PASID, hwpt_id,\n> + errp);\n> + trace_vtd_device_attach_hwpt(hiodi->devid, IOMMU_NO_PASID, hwpt_id, ret);\n> if (ret) {\n> /* Destroy old fs_hwpt if it's a replacement */\n> vtd_destroy_old_fs_hwpt(hiodi, vtd_as);\n> @@ -141,22 +142,22 @@ static bool vtd_device_detach_iommufd(VTDHostIOMMUDevice *vtd_hiod,\n> {\n> HostIOMMUDeviceIOMMUFD *hiodi = HOST_IOMMU_DEVICE_IOMMUFD(vtd_hiod->hiod);\n> IntelIOMMUState *s = vtd_as->iommu_state;\n> - uint32_t pasid = vtd_as->pasid;\n> bool ret;\n> \n> if (s->dmar_enabled && s->root_scalable) {\n> - ret = host_iommu_device_iommufd_detach_hwpt(hiodi, errp);\n> - trace_vtd_device_detach_hwpt(hiodi->devid, pasid, ret);\n> + ret = host_iommu_device_iommufd_detach_hwpt(hiodi, IOMMU_NO_PASID,\n> + errp);\n> + trace_vtd_device_detach_hwpt(hiodi->devid, IOMMU_NO_PASID, ret);\n> } else {\n> /*\n> * If DMAR remapping is disabled or guest switches to legacy mode,\n> * we fallback to the default HWPT which contains shadow page table.\n> * So guest DMA could still work.\n> */\n> - ret = host_iommu_device_iommufd_attach_hwpt(hiodi, hiodi->hwpt_id,\n> - errp);\n> - trace_vtd_device_reattach_def_hwpt(hiodi->devid, pasid, hiodi->hwpt_id,\n> - ret);\n> + ret = host_iommu_device_iommufd_attach_hwpt(hiodi, IOMMU_NO_PASID,\n> + hiodi->hwpt_id, errp);\n> + trace_vtd_device_reattach_def_hwpt(hiodi->devid, IOMMU_NO_PASID,\n> + hiodi->hwpt_id, ret);\n> }\n> \n> if (ret) {\n> diff --git a/hw/vfio/iommufd.c b/hw/vfio/iommufd.c\n> index f020b56208..ecabc33064 100644\n> --- a/hw/vfio/iommufd.c\n> +++ b/hw/vfio/iommufd.c\n> @@ -927,21 +927,21 @@ static void vfio_iommu_iommufd_class_init(ObjectClass *klass, const void *data)\n> \n> static bool\n> host_iommu_device_iommufd_vfio_attach_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,\n> - uint32_t hwpt_id, Error **errp)\n> + uint32_t pasid, uint32_t hwpt_id,\n> + Error **errp)\n> {\n> VFIODevice *vbasedev = HOST_IOMMU_DEVICE(hiodi)->agent;\n> \n> - return !iommufd_cdev_pasid_attach_ioas_hwpt(vbasedev, IOMMU_NO_PASID,\n> - hwpt_id, errp);\n> + return !iommufd_cdev_pasid_attach_ioas_hwpt(vbasedev, pasid, hwpt_id, errp);\n> }\n> \n> static bool\n> host_iommu_device_iommufd_vfio_detach_hwpt(HostIOMMUDeviceIOMMUFD *hiodi,\n> - Error **errp)\n> + uint32_t pasid, Error **errp)\n> {\n> VFIODevice *vbasedev = HOST_IOMMU_DEVICE(hiodi)->agent;\n> \n> - return iommufd_cdev_pasid_detach_ioas_hwpt(vbasedev, IOMMU_NO_PASID, errp);\n> + return iommufd_cdev_pasid_detach_ioas_hwpt(vbasedev, pasid, errp);\n> }\n> \n> static bool 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[PATCH v3 02/14] iommufd: Extend attach/detach_hwpt callbacks to\n support pasid","To":"Zhenzhong Duan , qemu-devel@nongnu.org","Cc":"alex@shazbot.org, eric.auger@redhat.com, mst@redhat.com,\n jasowang@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com,\n skolothumtho@nvidia.com, joao.m.martins@oracle.com,\n clement.mathieu--drif@bull.com, kevin.tian@intel.com, yi.l.liu@intel.com,\n xudong.hao@intel.com, qemu-arm@nongnu.org","References":"<20260403035541.18355-1-zhenzhong.duan@intel.com>\n <20260403035541.18355-3-zhenzhong.duan@intel.com>","Content-Language":"en-US, fr","From":"=?utf-8?q?C=C3=A9dric_Le_Goater?= ","Autocrypt":"addr=clg@redhat.com; keydata=\n xsFNBFu8o3UBEADP+oJVJaWm5vzZa/iLgpBAuzxSmNYhURZH+guITvSySk30YWfLYGBWQgeo\n 8NzNXBY3cH7JX3/a0jzmhDc0U61qFxVgrPqs1PQOjp7yRSFuDAnjtRqNvWkvlnRWLFq4+U5t\n yzYe4SFMjFb6Oc0xkQmaK2flmiJNnnxPttYwKBPd98WfXMmjwAv7QfwW+OL3VlTPADgzkcqj\n 53bfZ4VblAQrq6Ctbtu7JuUGAxSIL3XqeQlAwwLTfFGrmpY7MroE7n9Rl+hy/kuIrb/TO8n0\n 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