Re: [Qemu-devel] [PATCH v2] isa/piix: move to mips malta

[Michael S. Tsirkin]

On Tue, Mar 05, 2019 at 01:53:45AM +0100, Philippe Mathieu-Daudé wrote:
> Hi Michael,
> 
> On 1/9/18 3:59 PM, Michael S. Tsirkin wrote:
> > This device is only used on mips malta, move it to the maintainer
> > that's actually testing it.
> 
> Slighly related to this patch, since I included it while working on
> Kconfig/MIPS.
> I splitted PIIX3/PIIX4 (Actually PIIX3 was mixed with I440FX).
> These are indeed 2 different chipsets, PIIX4 is an improved PIIX3.
> 
> I compiled MIPS with PIIX4 and it works, however when I ran all the
> testsuite X86 failed due to PIIX4_PM missing.
> I looked where it is used:
> 
> $ git grep PIIX4_PM
> docs/interop/firmware.json:96:#           enabled with "-global
> PIIX4_PM.disable_s3=0" and disabled
> docs/interop/firmware.json:97:#           with "-global
> PIIX4_PM.disable_s3=1". On the "pc-q35-*"
> docs/interop/firmware.json:105:#           can be enabled with "-global
> PIIX4_PM.disable_s4=0" and
> docs/interop/firmware.json:106:#           disabled with "-global
> PIIX4_PM.disable_s4=1". On the
> hw/i386/pc.c:282:    { "PIIX4_PM", "memory-hotplug-support", "off" },
> hw/i386/pc.c:299:    { "PIIX4_PM",
> "acpi-pci-hotplug-with-bridge-support", "off" },
> 
> So now I'm confused, looking at git history I see you introduced this in
> commit 9e047b98245.
> 
> What chipset do use the PC machine? An unreal hybrid of PIIX3/PIIX4?
> 
> Thanks,
> 
> Phil.

Yes I think it does not match any real hardware at this point.

Not sure what does grep above show: to create piix4 pm
pc_init1 calls piix4_pm_init.


> > 
> > Cc: Aurelien Jarno <address@hidden>
> > Cc: Yongbok Kim <address@hidden>
> > Cc: Hervé Poussineau <address@hidden>
> > Signed-off-by: Michael S. Tsirkin <address@hidden>
> > ---
> > 
> > Aurelien, pls feel free to merge this or v1.
> > 
> >  MAINTAINERS | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 0255113..0b8a5e7 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -641,6 +641,7 @@ Malta
> >  M: Aurelien Jarno <address@hidden>
> >  S: Maintained
> >  F: hw/mips/mips_malta.c
> > +F: hw/isa/piix4.c
> >  
> >  Mipssim
> >  M: Yongbok Kim <address@hidden>
> > @@ -849,7 +850,6 @@ F: hw/pci-host/q35.c
> >  F: hw/pci-host/pam.c
> >  F: include/hw/pci-host/q35.h
> >  F: include/hw/pci-host/pam.h
> > -F: hw/isa/piix4.c
> >  F: hw/isa/lpc_ich9.c
> >  F: hw/i2c/smbus_ich9.c
> >  F: hw/acpi/piix4.c
> >