From: Jason Gunthorpe <jgg@ziepe.ca>
To: "Aneesh Kumar K.V" <aneesh.kumar@kernel.org>
Cc: Nicolin Chen <nicolinc@nvidia.com>,
linux-coco@lists.linux.dev, kvmarm@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Alexey Kardashevskiy <aik@amd.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Dan Williams <dan.j.williams@intel.com>,
Joerg Roedel <joro@8bytes.org>,
Jonathan Cameron <jic23@kernel.org>,
Marc Zyngier <maz@kernel.org>,
Pranjal Shrivastava <praan@google.com>,
Robin Murphy <robin.murphy@arm.com>,
Samuel Ortiz <sameo@rivosinc.com>,
Steven Price <steven.price@arm.com>,
Suzuki K Poulose <Suzuki.Poulose@arm.com>,
Will Deacon <will@kernel.org>,
Xu Yilun <yilun.xu@linux.intel.com>
Subject: Re: [RFC PATCH v4 03/16] iommu/arm-smmu-v3: Add initial pSMMU realm viommu plumbing
Date: Tue, 1 Sep 2026 11:34:45 -0300 [thread overview]
Message-ID: <20260901143445.GC56830@ziepe.ca> (raw)
In-Reply-To: <yq5aecfdnv4i.fsf@kernel.org>
On Tue, Sep 01, 2026 at 03:36:37PM +0530, Aneesh Kumar K.V wrote:
> @@ -463,14 +460,13 @@
> vsmmu->vmid = s2_parent->s2_cfg.vmid;
>
> if (viommu->type == IOMMU_VIOMMU_TYPE_ARM_SMMUV3) {
> + if (arm_smmu_is_realm_viommu(viommu))
> + return arm_realm_smmu_v3_init(viommu, user_data);
> +
I think the realm vsmmu is going to require a different info struct
than the normal psmmu case, isn't it?
If so it needs its own enum value.
It would be nice to see a draft patch showing how the real vsmmu works
on top of the RMM spec for it. If we are using a viommu object then
non-vsmmu case should be identical just with an option in the info
struct to not create the vsmmu object.
Jason
next prev parent reply other threads:[~2026-09-01 14:35 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-27 8:53 [RFC PATCH v4 00/16] coco/TSM: Implement host-side support for Arm CCA TDISP setup Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 01/16] iommu/arm-smmu-v3: Discover RME support and realm IRQ topology Aneesh Kumar K.V (Arm)
2026-08-29 18:22 ` Nicolin Chen
2026-09-01 8:46 ` Aneesh Kumar K.V
2026-09-01 14:32 ` Jason Gunthorpe
2026-04-27 8:53 ` [RFC PATCH v4 02/16] iommu/arm-smmu-v3: Save the programmed MSI message in msi_desc Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 03/16] iommu/arm-smmu-v3: Add initial pSMMU realm viommu plumbing Aneesh Kumar K.V (Arm)
2026-08-29 20:00 ` Nicolin Chen
2026-09-01 9:17 ` Aneesh Kumar K.V
2026-09-01 10:06 ` Aneesh Kumar K.V
2026-09-01 14:34 ` Jason Gunthorpe [this message]
2026-09-01 17:13 ` Nicolin Chen
2026-09-01 17:18 ` Nicolin Chen
2026-09-01 17:45 ` Jason Gunthorpe
2026-09-01 17:42 ` Jason Gunthorpe
2026-09-01 19:08 ` Nicolin Chen
2026-09-02 0:21 ` Nicolin Chen
2026-09-02 1:51 ` Jason Gunthorpe
2026-09-01 17:36 ` Nicolin Chen
2026-04-27 8:53 ` [RFC PATCH v4 04/16] iommu/arm-smmu-v3: Track realm pSMMU users with refcount_t Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 05/16] coco: host: arm64: Add support for virtual device communication Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 06/16] coco: host: arm64: Add support for RMM vdev objects Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 07/16] coco: host: arm64: Add pdev stream key refresh and purge helpers Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 08/16] coco: host: arm64: Add helpers to unlock and destroy RMM vdev Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 09/16] coco: host: arm64: Add support for da object read RHI handling Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 10/16] coco: host: arm64: Add helper for cached object fetches Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 11/16] coco: host: arm64: Fetch interface report via RMI Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 12/16] coco: host: arm64: Fetch device measurements " Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 13/16] coco: host: KVM: arm64: Handle vdev validate-mapping exits Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 14/16] KVM: arm64: Unmap device mappings when a private granule is destroyed Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 15/16] coco: host: arm64: Transition vdevs to TDISP RUN state Aneesh Kumar K.V (Arm)
2026-04-27 8:53 ` [RFC PATCH v4 16/16] KVM: arm64: CCA: enable DA in realm create parameters Aneesh Kumar K.V (Arm)
2026-08-31 18:08 ` [RFC PATCH v4 00/16] coco/TSM: Implement host-side support for Arm CCA TDISP setup Jason Gunthorpe
2026-09-01 12:44 ` Aneesh Kumar K.V
2026-09-01 13:07 ` Jason Gunthorpe
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