Re: [Qemu-devel] [PATCH v3 0/4] Introduce the microvm machine type

[Michael S. Tsirkin]

On Thu, Jul 25, 2019 at 05:39:39PM +0200, Paolo Bonzini wrote:
> On 25/07/19 17:01, Michael S. Tsirkin wrote:
> >> It would be educational to try to enable ACPI core but disable all
> >> optional features.
> 
> A lot of them are select'ed so it's not easy.
> 
> > Trying with ACPI_REDUCED_HARDWARE_ONLY would also be educational.
> 
> That's what the NEMU guys experimented with.  It's not supported by our
> DSDT since it uses ACPI GPE,

Well there are two GPE blocks in FADT. We could just switch to
these if necesary I think.

> and the reduction in code size is small
> (about 15000 lines of code in ACPICA, perhaps 100k if you're lucky?).
> 
> Paolo

Well ACPI is 150k loc I think, right?

linux]$ wc -l `find drivers/acpi/ -name '*.c' `|tail -1
 145926 total

So 100k wouldn't be too shabby.

-- 
MST