linux-kernel - Re: [RFC PATCH v1 00/38] ARM CCA Device Assignment support

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Message-ID: <20250730160326.GN26511@ziepe.ca>
Date: Wed, 30 Jul 2025 13:03:26 -0300
From: Jason Gunthorpe <jgg@...pe.ca>
To: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@...nel.org>
Cc: linux-coco@...ts.linux.dev, kvmarm@...ts.linux.dev,
	linux-pci@...r.kernel.org, linux-kernel@...r.kernel.org,
	aik@....com, lukas@...ner.de, Samuel Ortiz <sameo@...osinc.com>,
	Xu Yilun <yilun.xu@...ux.intel.com>,
	Suzuki K Poulose <Suzuki.Poulose@....com>,
	Steven Price <steven.price@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Marc Zyngier <maz@...nel.org>, Will Deacon <will@...nel.org>,
	Oliver Upton <oliver.upton@...ux.dev>
Subject: Re: [RFC PATCH v1 00/38] ARM CCA Device Assignment support

On Mon, Jul 28, 2025 at 07:21:37PM +0530, Aneesh Kumar K.V (Arm) wrote:
> This patch series implements support for Device Assignment in the ARM CCA
> architecture. The code changes are based on Alp12 specification published here
> [1].

Robin and I were talking about CCA and DMA here:

https://lore.kernel.org/r/6c5fb9f0-c608-4e19-8c60-5d8cef3efbdf@arm.com

What do you think about pulling some of this out and trying to
independently push a series getting the DMA API layers ready for
device assignment?

I think there will be some discussion on these points, it would be
good to get started.

Jason