Re: [Qemu-devel] [PATCH] ACPI: Add IRQ resource to HPET._CRS on Mac OS X

[Gabriel L. Somlo]

On Sat, Jan 25, 2014 at 10:08:37AM +0100, Alexander Graf wrote:
> > From a cursory pass through the Chameleon source, I don't think so.
> Ok :). I only barely remember what Chameleon did on top of the normal
> Apple BIOS bootloader.

I'll start poking at it to find out exactly what it does, but it
appears to only allow the option of a full DSDT replacement via a
supplied AML file, but doesn't seem to *edit* the default DSDT in
any way.

> > Currently, I have SnowLeopard, Lion, and MountainLion working fine.
> > MountainLion needs the 10.8.5 installer (10.8.0 installer hangs at
> > boot).
> > 
> > Mavericks 10.9.0 installer boots and works fine, but the resulting hdd
> > image, while bootable, hangs during boot. I want to try the latest
> > Mavericks installer before moving on to isolate the bits of Chameleon
> > magic that are relevant to us (QEMU+KVM).
> > 
> > That's about where things are right now :)
> 
> Nice progress :). Thanks a lot for taking care of all this!

So, most current state of affairs with most up-to-date releases
of each of 10.[6..9]:

- IRQNoFlags hack only needed on SnowLeopard with PIIX *and* SMP;
  every other version works fine without it in all combinations, at
  the currently most up to date point release.

- I can boot everything from SnowLeopard all the way to Mavericks
  using Chameleon (svn 2345 or later), with the following caveats:

    - MountainLion only boots and installs from later releases
      (I tried. 10.8.0 and it didn't boot, then 10.8.5 and it works
      flawlessly -- no idea where between the two it started working)

    - e1000 link negotiation patch needed on 10.6 and 10.7 (see
      http://lists.nongnu.org/archive/html/qemu-devel/2013-11/msg01046.html)

        - on 10.8 without that patch link is still reported as "down"
          but packets do make it in and out of the guest successfully
          anyway !!! :)

    - on Mavericks, the e1000 pci card doesn't work. In "System
      Information", under "Hardware", I get nothing under "Ethernet
      Cards", and "ethernet controller, pci slot 2, driver_installed=No"
      under "PCI Cards". On MountainLion and earlier, "Driver Installed"
      used to be "Yes", and the card used to show up under Ethernet Cards
      as well, using the AppleIntel8254XEthernet.kext. This kext is
      present on Mavericks as well, but doesn't seem to work there.

    - Once the "firstboot" portion of Mavericks is complete, I can
      boot it UP or SMP, PIIX or Q35, and it works OK (modulo the
      problem with not recognizing the e1000 network card). But after
      a fresh install from media, the first boot only happens with
      SMP. First boot *without* SMP hangs immediately before the
      GUI would have been started.

Any ideas (especially related to the e1000 weirdness) much
appreciated!

Thanks,
--Gabriel

PS. For *all* OS X versions mentioned above, I'm patching kvm to treat
  monitor and mwait as NOP, and also the mysterious "ioapic polarity"
  patch without which OS X hangs at boot with "still waiting for root
  device". I'll dig at this one a bit too, over the next couple of
  weeks, then open up a thread about it on the KVM list, where it
  belongs...

--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -328,7 +328,6 @@ int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, 
int irq_source_id,
        irq_level = __kvm_irq_line_state(&ioapic->irq_states[irq],
                                         irq_source_id, level);
        entry = ioapic->redirtbl[irq];
-       irq_level ^= entry.fields.polarity;
        if (!irq_level) {
                ioapic->irr &= ~mask;
                ret = 1;