[PATCH 05/33] qemu_domain.c: define ISA as default PowerNV serial

Peter Krempa pkrempa at redhat.com
Fri Jan 21 14:01:32 UTC 2022

On Thu, Jan 20, 2022 at 11:22:15 -0300, Daniel Henrique Barboza wrote:
> On 1/20/22 10:58, Peter Krempa wrote:
> > On Thu, Jan 20, 2022 at 10:52:08 -0300, Daniel Henrique Barboza wrote:
> > > The PowerNV machines uses ISA as the default serial type.
> > 
> > ISA? Are you sure?
> > 
> > ISA is very legacy x86 bus.
> Yes, these machines uses ISA buses.

Okay, I have very hard time believing it, but I'm not an expert on Power

> I believe that since it's also uses an UART
> the bus itself isn't that much of a deal.

Well, it does matter, because with isa-serial you can configure an ISA
address for it:

<address type='isa' iobase='0x3f8' irq='0x4'/>

I also see that 'isa-serial' is mentioned by the ppc64 capability dump,
but in this case I'm not sure whether it's because it really supports an
ISA device or it's just that qemu exposes all platform-specific serial
ports as 'isa-serial'.

More information about the libvir-list mailing list