From: Jason Gunthorpe <jgg@nvidia.com>
To: Shameer Kolothum <skolothumtho@nvidia.com>
Cc: Nicolin Chen <nicolinc@nvidia.com>,
Shameer Kolothum <shameerkolothum@gmail.com>,
"qemu-arm@nongnu.org" <qemu-arm@nongnu.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"eric.auger@redhat.com" <eric.auger@redhat.com>,
"peter.maydell@linaro.org" <peter.maydell@linaro.org>,
"ddutile@redhat.com" <ddutile@redhat.com>,
"berrange@redhat.com" <berrange@redhat.com>,
Nathan Chen <nathanc@nvidia.com>, Matt Ochs <mochs@nvidia.com>,
"smostafa@google.com" <smostafa@google.com>,
"linuxarm@huawei.com" <linuxarm@huawei.com>,
"wangzhou1@hisilicon.com" <wangzhou1@hisilicon.com>,
"jiangkunkun@huawei.com" <jiangkunkun@huawei.com>,
"jonathan.cameron@huawei.com" <jonathan.cameron@huawei.com>,
"zhangfei.gao@linaro.org" <zhangfei.gao@linaro.org>,
"zhenzhong.duan@intel.com" <zhenzhong.duan@intel.com>
Subject: Re: [RFC PATCH v3 06/15] hw/arm/smmuv3-accel: Restrict accelerated SMMUv3 to vfio-pci endpoints with iommufd
Date: Wed, 17 Sep 2025 16:04:01 -0300 [thread overview]
Message-ID: <20250917190401.GD1391379@nvidia.com> (raw)
In-Reply-To: <CH3PR12MB7548347E93651468E70B2470AB17A@CH3PR12MB7548.namprd12.prod.outlook.com>
On Wed, Sep 17, 2025 at 06:52:31PM +0000, Shameer Kolothum wrote:
> > All vSMMU instances could share the same ioas_id. That is why I
> > put in the SMMUBaseClass as it's shared structure across vSMMUs.
>
> Ah..you mean it is basically per VM then. Got it.
Yes, this is quite important, each ioas charges memory for what it
pins, so every needless duplicate wrongly inflates the accounting.
We also are working to have the kernel share S2 page tables across
instances which requires a single ioas.
Jason
next prev parent reply other threads:[~2025-09-17 19:04 UTC|newest]
Thread overview: 165+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-07-14 15:59 [RFC PATCH v3 00/15] hw/arm/virt: Add support for user-creatable accelerated SMMUv3 Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 15:59 ` [RFC PATCH v3 01/15] backends/iommufd: Introduce iommufd_backend_alloc_viommu Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 16:22 ` Nicolin Chen
2025-07-15 9:14 ` Jonathan Cameron via
2025-07-15 9:14 ` Jonathan Cameron via
2025-07-14 15:59 ` [RFC PATCH v3 02/15] backends/iommufd: Introduce iommufd_vdev_alloc Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 16:27 ` Nicolin Chen
2025-07-15 9:19 ` Jonathan Cameron via
2025-07-15 9:19 ` Jonathan Cameron via
2025-07-14 15:59 ` [RFC PATCH v3 03/15] hw/arm/smmu-common: Factor out common helper functions and export Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-15 9:27 ` Jonathan Cameron via
2025-07-15 9:27 ` Jonathan Cameron via
2025-07-14 15:59 ` [RFC PATCH v3 04/15] hw/arm/smmu-common: Introduce smmu_iommu_ops_by_type() helper Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 16:38 ` Nicolin Chen via
2025-07-14 16:38 ` Nicolin Chen via
2025-07-15 9:30 ` Jonathan Cameron via
2025-07-15 9:30 ` Jonathan Cameron via
2025-09-04 7:55 ` Eric Auger
2025-07-14 15:59 ` [RFC PATCH v3 05/15] hw/arm/smmuv3-accel: Introduce smmuv3 accel device Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 17:23 ` Nicolin Chen
2025-09-04 14:33 ` Eric Auger
2025-09-05 8:22 ` Shameer Kolothum
2025-09-05 10:17 ` Eric Auger
2025-09-08 9:15 ` Shameer Kolothum
2025-09-09 13:38 ` Eric Auger
2025-07-15 9:45 ` Jonathan Cameron via
2025-07-15 9:45 ` Jonathan Cameron via
2025-07-15 10:48 ` Duan, Zhenzhong
2025-07-15 17:29 ` Nicolin Chen
2025-07-16 3:38 ` Duan, Zhenzhong
2025-07-16 9:27 ` Shameerali Kolothum Thodi via
2025-07-16 9:27 ` Shameerali Kolothum Thodi via
2025-09-04 14:31 ` Eric Auger
2025-09-10 16:10 ` Shameer Kolothum
2025-07-14 15:59 ` [RFC PATCH v3 06/15] hw/arm/smmuv3-accel: Restrict accelerated SMMUv3 to vfio-pci endpoints with iommufd Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 18:18 ` Nicolin Chen
2025-07-15 9:51 ` Jonathan Cameron via
2025-07-15 9:51 ` Jonathan Cameron via
2025-07-15 10:53 ` Duan, Zhenzhong
2025-07-15 17:59 ` Nicolin Chen
2025-07-16 6:26 ` Duan, Zhenzhong
2025-07-16 9:34 ` Shameerali Kolothum Thodi via
2025-07-16 9:34 ` Shameerali Kolothum Thodi via
2025-07-16 10:32 ` Duan, Zhenzhong
2025-07-16 17:51 ` Nicolin Chen
2025-07-16 18:21 ` Nicolin Chen
2025-09-05 8:34 ` Eric Auger
2025-09-05 8:14 ` Eric Auger
2025-09-08 7:41 ` Shameer Kolothum
2025-09-09 13:34 ` Eric Auger
2025-07-16 8:06 ` Shameerali Kolothum Thodi via
2025-07-16 8:06 ` Shameerali Kolothum Thodi via
2025-09-05 8:29 ` Eric Auger
2025-09-08 7:55 ` Shameer Kolothum
2025-08-06 0:55 ` Nicolin Chen
2025-09-16 10:33 ` Shameer Kolothum
2025-09-17 18:45 ` Nicolin Chen
2025-09-17 18:52 ` Shameer Kolothum
2025-09-17 19:04 ` Jason Gunthorpe [this message]
2025-09-18 13:31 ` Shameer Kolothum
2025-09-18 22:00 ` Nicolin Chen
2025-09-19 7:38 ` Shameer Kolothum
2025-09-19 18:36 ` Nicolin Chen
2025-09-20 13:03 ` Peter Maydell
2025-09-22 8:28 ` Shameer Kolothum
2025-09-05 8:42 ` Eric Auger
2025-09-08 8:03 ` Shameer Kolothum
2025-07-14 15:59 ` [RFC PATCH v3 07/15] hw/arm/smmuv3: Implement get_viommu_cap() callback Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 18:31 ` Nicolin Chen
2025-09-05 8:49 ` Eric Auger
2025-09-08 8:22 ` Shameer Kolothum
2025-09-08 13:40 ` Jason Gunthorpe
2025-09-09 13:37 ` Eric Auger
2025-07-14 15:59 ` [RFC PATCH v3 08/15] hw/arm/smmuv3-accel: Add set/unset_iommu_device callback Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 19:11 ` Nicolin Chen
2025-07-15 10:29 ` Jonathan Cameron via
2025-07-15 10:29 ` Jonathan Cameron via
2025-07-15 17:01 ` Nicolin Chen
2025-07-16 9:33 ` Jonathan Cameron via
2025-07-16 9:33 ` Jonathan Cameron via
2025-09-05 9:27 ` Eric Auger
2025-09-08 8:49 ` Shameer Kolothum
2025-07-14 15:59 ` [RFC PATCH v3 09/15] hw/arm/smmuv3-accel: Support nested STE install/uninstall support Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 19:37 ` Nicolin Chen
2025-07-15 23:12 ` Nicolin Chen
2025-07-16 8:36 ` Shameerali Kolothum Thodi via
2025-07-16 8:36 ` Shameerali Kolothum Thodi via
2025-07-16 18:17 ` Nicolin Chen
2025-09-05 9:51 ` Eric Auger
2025-09-05 9:40 ` Eric Auger
2025-07-14 15:59 ` [RFC PATCH v3 10/15] hw/arm/smmuv3-accel: Allocate a vDEVICE object for device Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 19:43 ` Nicolin Chen
2025-09-05 9:57 ` Eric Auger
2025-09-05 18:36 ` Nicolin Chen
2025-07-14 15:59 ` [RFC PATCH v3 11/15] hw/pci/pci: Introduce optional get_msi_address_space() callback Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 19:50 ` Nicolin Chen
2025-09-05 10:11 ` Eric Auger
2025-09-05 10:11 ` Eric Auger
2025-07-14 15:59 ` [RFC PATCH v3 12/15] hw/arm/smmuv3-accel: Introduce helpers to batch and issue cache invalidations Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 19:55 ` Nicolin Chen
2025-07-15 10:39 ` Jonathan Cameron via
2025-07-15 10:39 ` Jonathan Cameron via
2025-07-15 17:07 ` Nicolin Chen
2025-09-05 10:31 ` Eric Auger
2025-09-08 9:59 ` Shameer Kolothum
2025-09-08 19:29 ` Nicolin Chen
2025-07-14 15:59 ` [RFC PATCH v3 13/15] hw/arm/smmuv3: Forward invalidation commands to hw Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-15 10:46 ` Jonathan Cameron via
2025-07-15 10:46 ` Jonathan Cameron via
2025-07-15 17:22 ` Nicolin Chen
2025-07-16 7:32 ` Shameerali Kolothum Thodi via
2025-07-16 7:32 ` Shameerali Kolothum Thodi via
2025-09-05 12:45 ` Eric Auger
2025-09-08 12:22 ` Shameer Kolothum
2025-09-08 20:12 ` Nicolin Chen
2025-09-09 13:43 ` Eric Auger
2025-07-14 15:59 ` [RFC PATCH v3 14/15] Read and validate host SMMUv3 feature bits Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 20:04 ` Nicolin Chen via
2025-07-14 20:04 ` Nicolin Chen via
2025-07-14 20:24 ` Nicolin Chen via
2025-07-14 20:24 ` Nicolin Chen via
2025-07-15 10:48 ` Jonathan Cameron via
2025-07-15 10:48 ` Jonathan Cameron via
2025-07-16 2:57 ` Nicolin Chen via
2025-07-16 2:57 ` Nicolin Chen via
2025-07-16 10:26 ` Shameerali Kolothum Thodi via
2025-07-16 10:26 ` Shameerali Kolothum Thodi via
2025-07-16 18:37 ` Nicolin Chen
2025-07-16 11:51 ` Jason Gunthorpe
2025-07-16 17:35 ` Nicolin Chen
2025-07-16 17:45 ` Jason Gunthorpe
2025-07-16 18:09 ` Nicolin Chen
2025-07-16 18:42 ` Jason Gunthorpe
2025-07-16 18:53 ` Nicolin Chen
2025-09-05 13:04 ` Eric Auger
2025-07-22 17:42 ` Nicolin Chen
2025-09-05 13:20 ` Eric Auger
2025-07-14 15:59 ` [RFC PATCH v3 15/15] hw/arm/smmu-common: Add accel property for SMMU dev Shameer Kolothum via
2025-07-14 15:59 ` Shameer Kolothum via
2025-07-14 20:00 ` Nicolin Chen
2025-07-15 10:49 ` Jonathan Cameron via
2025-07-15 10:49 ` Jonathan Cameron via
2025-09-05 10:36 ` Eric Auger
2025-07-14 16:14 ` [RFC PATCH v3 00/15] hw/arm/virt: Add support for user-creatable accelerated SMMUv3 Nicolin Chen via
2025-07-14 16:14 ` Nicolin Chen via
2025-07-14 20:22 ` Nicolin Chen via
2025-07-14 20:22 ` Nicolin Chen via
2025-07-15 10:46 ` Duan, Zhenzhong
2025-07-16 7:27 ` Shameerali Kolothum Thodi via
2025-07-16 7:27 ` Shameerali Kolothum Thodi via
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