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To: Nicolin Chen <nicolinc@nvidia.com>, "will@kernel.org" <will@kernel.org>,
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Subject: RE: [PATCH RFCv1 00/14] Add Tegra241 (Grace) CMDQV Support (part 2/2)
Thread-Topic: [PATCH RFCv1 00/14] Add Tegra241 (Grace) CMDQV Support (part
 2/2)
Thread-Index: AQHajVVgzSKGnSPg+UW1Z+6EC5j/q7GjLESA
Date: Wed, 22 May 2024 08:40:00 +0000
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References: <cover.1712978212.git.nicolinc@nvidia.com>
In-Reply-To: <cover.1712978212.git.nicolinc@nvidia.com>
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> From: Nicolin Chen <nicolinc@nvidia.com>
> Sent: Saturday, April 13, 2024 11:47 AM
>=20
> This is an experimental RFC series for VIOMMU infrastructure, using NVIDI=
A
> Tegra241 (Grace) CMDQV as a test instance.
>=20
> VIOMMU obj is used to represent a virtual interface (iommu) backed by an
> underlying IOMMU's HW-accelerated feature for virtualizaion: for example,
> NVIDIA's VINTF (v-interface for CMDQV) and AMD"s vIOMMU.
>=20
> VQUEUE obj is used to represent a virtual command queue (buffer) backed
> by
> an underlying IOMMU command queue to passthrough for VMs to use
> directly:
> for example, NVIDIA's Virtual Command Queue and AMD's Command Buffer.
>=20

is VCMDQ more accurate? AMD also supports fault queue passthrough
then VQUEUE sounds broader than a cmd queue...