From: Jason Gunthorpe <jgg@nvidia.com>
To: Shameer Kolothum <skolothumtho@nvidia.com>
Cc: "eric.auger@redhat.com" <eric.auger@redhat.com>,
"qemu-arm@nongnu.org" <qemu-arm@nongnu.org>,
"qemu-devel@nongnu.org" <qemu-devel@nongnu.org>,
"peter.maydell@linaro.org" <peter.maydell@linaro.org>,
Nicolin Chen <nicolinc@nvidia.com>,
"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>,
"shameerkolothum@gmail.com" <shameerkolothum@gmail.com>
Subject: Re: [RFC PATCH v3 07/15] hw/arm/smmuv3: Implement get_viommu_cap() callback
Date: Mon, 8 Sep 2025 10:40:30 -0300 [thread overview]
Message-ID: <20250908134030.GG616306@nvidia.com> (raw)
In-Reply-To: <CH3PR12MB75482B0418C01770FAEFF56CAB0CA@CH3PR12MB7548.namprd12.prod.outlook.com>
On Mon, Sep 08, 2025 at 08:22:59AM +0000, Shameer Kolothum wrote:
> > nit: strictly speaking couldn't we have a stage2 being used at guest
> > level implemented by a stage1 at physical level?
> > but it is totally fair to restrict the support.
>
> Yeah it is possible I guess. But then we have to use the S2TTB to configure
> Host SMMUv3 S1 instead of S1ContextPtr which is used now.
S1 and S2 have different PTE formats, you cannot take a guest S2 table
with S2 PTEs and have the hypervisor program it to a S1.
The guest must see a SMMU with no S2 support in the IDRs.
Jason
next prev parent reply other threads:[~2025-09-08 13:41 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
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 [this message]
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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