Re: [PATCH 02/10] hw/riscv/virt: Add a switch to enable/disable ACPI

[Andrew Jones]

On Mon, Feb 06, 2023 at 12:18:06PM +0100, Philippe Mathieu-Daudé wrote:
> On 6/2/23 11:54, Andrea Bolognani wrote:
> > On Thu, Feb 02, 2023 at 10:22:15AM +0530, Sunil V L wrote:
> > > +    object_class_property_add(oc, "acpi", "OnOffAuto",
> > > +                              virt_get_acpi, virt_set_acpi,
> > > +                              NULL, NULL);
> > > +    object_class_property_set_description(oc, "acpi",
> > > +                                          "Enable ACPI");
> > 
> > The way this works on other architectures (x86_64, aarch64) is that
> > you get ACPI by default and can use -no-acpi to disable it if
> > desired. Can we have the same on RISC-V, for consistency?
> 
> -no-acpi rather seems a x86-specific hack for the ISA PC machine, and
> has a high maintenance cost / burden.

Can you elaborate on this? RISCV doesn't need '-no-acpi' specifically.
If -no-acpi is problematic for some reason, then something like
'-machine virt,acpi=off' would be sufficient for switching to DT too.

Thanks,
drew