linux-kernel - Re: [PATCH v7 2/3] usb: Introduce Xen pvUSB frontend (xen hcd)

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Date:   Fri, 3 Dec 2021 13:50:44 +0100
From:   Juergen Gross <jgross@...e.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     xen-devel@...ts.xenproject.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v7 2/3] usb: Introduce Xen pvUSB frontend (xen hcd)

On 03.12.21 13:49, Greg Kroah-Hartman wrote:
> On Tue, Nov 23, 2021 at 02:20:47PM +0100, Juergen Gross wrote:
>> Introduces the Xen pvUSB frontend. With pvUSB it is possible for a Xen
>> domU to communicate with a USB device assigned to that domU. The
>> communication is all done via the pvUSB backend in a driver domain
>> (usually Dom0) which is owner of the physical device.
>>
>> The pvUSB frontend is a USB hcd for a virtual USB host connector.
>>
>> The code is taken from the pvUSB implementation in Xen done by Fujitsu
>> based on Linux kernel 2.6.18.
>>
>> Changes from the original version are:
>> - port to upstream kernel
>> - put all code in just one source file
>> - move module to appropriate location in kernel tree
>> - adapt to Linux style guide
>> - minor code modifications to increase readability
>>
>> Signed-off-by: Juergen Gross <jgross@...e.com>
>> ---
>>   drivers/usb/host/Kconfig   |   11 +
>>   drivers/usb/host/Makefile  |    1 +
>>   drivers/usb/host/xen-hcd.c | 1606 ++++++++++++++++++++++++++++++++++++
>>   3 files changed, 1618 insertions(+)
>>   create mode 100644 drivers/usb/host/xen-hcd.c
> 
> This looks sane to me, but I don't know the HCD interface as well as
> others on linux-usb do, like Alan Stern.
> 
> What tree do you want this to be merged through, my USB one?

Either that, or I can carry it through the Xen tree.

Its your choice. :-)


Juergen

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