Re: [PATCH v2 1/9] drivers/char: Add support for Xue USB3 debugger

[Jan Beulich <jbeulich@xxxxxxxx>]

On 06.07.2022 17:32, Marek Marczykowski-Górecki wrote:
> From: Connor Davis <davisc@xxxxxxxxxxxx>
> 
> [Connor]
> Xue is a cross-platform USB 3 debugger that drives the Debug
> Capability (DbC) of xHCI-compliant host controllers. This patch
> implements the operations needed for xue to initialize the host
> controller's DbC and communicate with it. It also implements a struct
> uart_driver that uses xue as a backend. Note that only target -> host
> communication is supported for now. To use Xue as a console, add
> 'console=dbgp dbgp=xue' to the command line.
> 
> [Marek]
> The Xue driver is taken from https://github.com/connojd/xue and heavily
> refactored to fit into Xen code base. Major changes include:
> - drop support for non-Xen systems
> - drop xue_ops abstraction
> - use Xen's native helper functions for PCI access
> - move all the code to xue.c, drop "inline"
> - build for x86 only
> - annotate functions with cf_check
> - adjust for Xen's code style
> 
> At this stage, only the first xHCI is considered. Later patch adds
> support for choosing specific one.
> The driver is initiallized before memory allocator works, so all the
> transfer buffers (about 2MB of them) are allocated statically and will
> use memory even if XUE console is not selected. The driver can be
> disabled build time to reclaim this memory.
> 
> Signed-off-by: Connor Davis <davisc@xxxxxxxxxxxx>

Btw - iirc this email address has already been bouncing for me when
replying to v1 patches. Interestingly enough you did Cc the cover
letter to Connor Davis <connojdavis@xxxxxxxxx> (which I'm using in
replacement for the other address in this reply). And I can only
assume that the address did bounce for you as well when sending
both v1 and v2 ...

Jan