On Thu, 29 Aug 2024 15:34:29 -0700, Nicolin Chen wrote:

NVIDIA's Tegra241 (Grace) SoC has a CMDQ-Virtualization (CMDQV) hardware
that extends standard ARM SMMUv3 to support multiple command queues with
virtualization capabilities. Though this is similar to the ECMDQ in SMMU
v3.3, CMDQV provides additional Virtual Interfaces (VINTFs) allowing VMs
to have their own VINTFs and Virtual Command Queues (VCMDQs). The VCMDQs
can only execute a limited set of commands, mainly invalidation commands
when exclusively used by the VMs, compared to the standard SMMUv3 CMDQ.

[...]

Thanks for this, Nicolin! I did drop the 'default' statement in the end,
as I think it's a bit overkill to fail the probe in that case.

Applied to will (for-joerg/arm-smmu/updates), thanks!

[01/10] iommu/arm-smmu-v3: Issue a batch of commands to the same cmdq
        https://git.kernel.org/will/c/56ae8866f3b4
[02/10] iommu/arm-smmu-v3: Pass in cmdq pointer to arm_smmu_cmdq_build_sync_cmd
        https://git.kernel.org/will/c/2ea1f0120f90
[03/10] iommu/arm-smmu-v3: Pass in cmdq pointer to arm_smmu_cmdq_init
        https://git.kernel.org/will/c/e736c895c45b
[04/10] iommu/arm-smmu-v3: Make symbols public for CONFIG_TEGRA241_CMDQV
        https://git.kernel.org/will/c/a7a08b857a32
[05/10] iommu/arm-smmu-v3: Add ARM_SMMU_OPT_TEGRA241_CMDQV
        https://git.kernel.org/will/c/b935a5b1c670
[06/10] iommu/arm-smmu-v3: Add acpi_smmu_iort_probe_model for impl
        https://git.kernel.org/will/c/6f3f9ff43d00
[07/10] iommu/arm-smmu-v3: Add struct arm_smmu_impl_ops
        https://git.kernel.org/will/c/6de80d619203
[08/10] iommu/arm-smmu-v3: Add in-kernel support for NVIDIA Tegra241 (Grace) CMDQV
        https://git.kernel.org/will/c/918eb5c856f6
[09/10] iommu/arm-smmu-v3: Start a new batch if new command is not supported
        https://git.kernel.org/will/c/f59e85490712
[10/10] iommu/tegra241-cmdqv: Limit CMDs for VCMDQs of a guest owned VINTF
        https://git.kernel.org/will/c/a9d40285bdef

Cheers,
-- 
Will

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