Re: [Qemu-devel] [PATCH v5 2/2] mach-virt: Provide sample configuration files

[Andrea Bolognani]

On Thu, 2017-02-09 at 17:36 +0100, Andrew Jones wrote:
> On Thu, Feb 09, 2017 at 05:11:38PM +0100, Andrea Bolognani wrote:
> > 
> > On Thu, 2017-02-09 at 16:35 +0100, Andrew Jones wrote:
> > > 
> > > > 
> > > > Please propose the alternative wording you'd like to see
> > > > so we can discuss it :)
> > >  
> > > I guess I did above with "... -nodefaults ensures no non-builtin
> > > peripherals are automatically added, but builtin peripherals,
> > > such as the PL011, will remain..."
> > 
> > Trying to work your proposal into my most recent stab at
> > this, I ended up with:
> > 
> >   Using -nodefaults is required to have full control over
> >   the virtual hardware: when it's specified, QEMU will
> >   populate the board with only the builtin peripherals,
> >   such as the PL011 UART, plus a small selection of core
> >   PCI devices and controllers; the user will then have to
> 
> Well, mach-virt doesn't currently add any pci devices with
> -nodefault; just the host bridge. Personally, I'd state it that
> way to avoid confusion, but I know you're trying to keep the
> paragraph similar to the q35 one, and you're not technically
> wrong...

Okay, one more try! ;)

  Using -nodefaults is required to have full control over
  the virtual hardware: when it's specified, QEMU will
  populate the board with only the builtin peripherals,
  such as the PL011 UART, plus a PCI Express Root Bus; the
  user will then have to explicitly add further devices.

  The PCI Express Root Bus shows up in the guest as:

    00:00.0 Host bridge

  This configuration file adds a number of...

-- 
Andrea Bolognani / Red Hat / Virtualization