linux-kernel - Re: [PATCH RFC] staging: Add driver to communicate with the T2 Security Chip

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Message-ID: <Z87vKltfijzRtlpL@smile.fi.intel.com>
Date: Mon, 10 Mar 2025 15:54:50 +0200
From: "andriy.shevchenko@...ux.intel.com" <andriy.shevchenko@...ux.intel.com>
To: Robin Murphy <robin.murphy@....com>
Cc: Aditya Garg <gargaditya08@...e.com>,
	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"bhelgaas@...gle.com" <bhelgaas@...gle.com>,
	"joro@...tes.org" <joro@...tes.org>,
	"will@...nel.org" <will@...nel.org>,
	"linux-staging@...ts.linux.dev" <linux-staging@...ts.linux.dev>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
	"iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	Aun-Ali Zaidi <admin@...eit.net>, "paul@...rm.io" <paul@...rm.io>,
	Orlando Chamberlain <orlandoch.dev@...il.com>
Subject: Re: [PATCH RFC] staging: Add driver to communicate with the T2
 Security Chip

On Mon, Mar 10, 2025 at 01:49:13PM +0000, Robin Murphy wrote:
> On 2025-03-09 8:40 am, Aditya Garg wrote:
> > From: Paul Pawlowski <paul@...rm.io>
> > 
> > This patch adds a driver named apple-bce, to add support for the T2
> > Security Chip found on certain Macs.
> > 
> > The driver has 3 main components:
> > 
> > BCE (Buffer Copy Engine) - this is what the files in the root directory
> > are for. This estabilishes a basic communication channel with the T2.
> > VHCI and Audio both require this component.
> > 
> > VHCI - this is a virtual USB host controller; keyboard, mouse and
> > other system components are provided by this component (other
> > drivers use this host controller to provide more functionality).
> > 
> > Audio - a driver for the T2 audio interface, currently only audio
> > output is supported.
> > 
> > Currently, suspend and resume for VHCI is broken after a firmware
> > update in iBridge since macOS Sonoma.

> I'm slightly puzzled why this was sent to the IOMMU maintainers when it
> doesn't touch any IOMMU code, nor even contain any reference to the IOMMU
> API at all...

People like to put a random people to a random contributions :-)

Aditya, you can utilise my "smart" script [1] to send the series
to more-or-less relevant people (but definitely to the right ones
± potentially interested, it has a heuristics inside).

[1]: https://github.com/andy-shev/home-bin-tools/blob/master/ge2maintainer.sh

-- 
With Best Regards,
Andy Shevchenko