Hi Gred, > -----Original Message----- > From: Gerd Hoffmann <kra...@redhat.com> > Sent: Monday, August 31, 2020 12:33 PM > To: Sai Pavan Boddu <saip...@xilinx.com> > Cc: Peter Maydell <peter.mayd...@linaro.org>; Markus Armbruster > <arm...@redhat.com>; 'Marc-André Lureau' > <marcandre.lur...@redhat.com>; Paolo Bonzini <pbonz...@redhat.com>; > Edgar Iglesias <edg...@xilinx.com>; Francisco Eduardo Iglesias > <figle...@xilinx.com>; qemu-devel@nongnu.org; Alistair Francis > <alistair.fran...@wdc.com>; Eduardo Habkost <ehabk...@redhat.com>; > Ying Fang <fangyi...@huawei.com>; 'Philippe Mathieu-Daudé' > <phi...@redhat.com>; Vikram Garhwal <f...@xilinx.com>; Paul > Zimmerman <pauld...@gmail.com> > Subject: Re: [PATCH v4 5/7] misc: Add versal-usb2-regs module > > On Sat, Aug 29, 2020 at 12:49:38AM +0530, Sai Pavan Boddu wrote: > > This is a dummy module to emulate control registers of versal usb2 > > controller. > > --verbose please. xhci supports all usb speeds, including usb2. [Sai Pavan Boddu] This module is has soc specific control/status register to control the phy-reset, adjust frame length time and coherency properties for the transactions.
> > So why this hardware is here, what does it on a real device and what is the > emulation doing? "dummy" sounds like it does just enough to make the > guest driver happy, probably pretending nothing is connected? Yes, this is added to make guest happy. I will the commit message with more info Regards, Sai Pavan > > thanks, > Gerd
