[libvirt] [PATCH] qemu: Support chardevs with ARM virt machines

[Andrea Bolognani]

On Mon, 2017-06-26 at 15:06 +0200, Andrew Jones wrote:
> > Cool,  I'll have a look as well and will document my complete
> > environment, then hopefully we can diff with yours and see where this
> > ISA thing shows up.
> 
> It's likely a pci-serial vs. isa-serial device getting created. Something
> like
> 
>   -device pcie-root-port,port=0xa,chassis=3,id=pci.3,bus=pcie.0,addr=0x1.0x2 \
>   -chardev stdio,logfile=logfile,id=chardev0,logappend=off \
>   -device pci-serial,chardev=chardev0,bus=pci.3,addr=0x0
> 
> works for me, but only with upstream (not RHEL) qemu, and when adding
> console=ttyS0 to the guest kernel command line.

That's using QEMU directly though, right?

Because the default for libvirt is to use isa-serial and you
would have to tell it explicitly to use pci-serial instead,
with

  <serial type='pty'>
    <target type='pci-serial' port='0'/>
  </serial>

My point is that you or Christoffer having configured your
QEMU binary differently shouldn't be enough to affect the
command line generated by libvirt.

-- 
Andrea Bolognani / Red Hat / Virtualization