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Re: [Qemu-devel] [PATCH v6 0/2] apic: bump emulated lapic version to 0x1

From: Michael S. Tsirkin
Subject: Re: [Qemu-devel] [PATCH v6 0/2] apic: bump emulated lapic version to 0x14
Date: Wed, 7 May 2014 17:02:42 +0300

On Wed, May 07, 2014 at 09:45:06AM -0400, Gabriel L. Somlo wrote:
> On Wed, May 07, 2014 at 12:37:43PM +0200, Paolo Bonzini wrote:
> > So Gabriel what's left for OS X guests to run out of the box (with
> > the right key for -device applesmc of course)?
> Once Gerd imports a new SeaBIOS blob, QEMU should be able to boot
> OS X "out of the box". Of course, there are stil some caveats:
> 1. We still need the Chameleon bootloader (to work around EFI):
>       - by loading only its stage-2 component (named "boot")
>         via the "-kernel boot" command line option to QEMU
>         (this is how I'm starting it right now)
>       - by installing all of Chameleon to the guest disk image,
>         the way hackintoshes do (I haven't tried this, but thought
>         it's worth mentioning).
> 2. e1000 flakiness:
>       - link negotiation is flaky (I have a patch, but was told
>         and agree that it morally belongs in the BIOS layer)

Could you remind me what the issue and the patch are?

>       - Mavericks doesn't like the current e1000 model
>         (E1000_DEV_ID_82540EM); there was a patch sent to the list
>         to allow selecting among different e1000 models, I think
>         it was:
> http://lists.nongnu.org/archive/html/qemu-devel/2014-02/msg04411.html
>         Mavericks likes E1000_DEV_ID_82545EM_COPPER, but Windows
>         won't work with that, so picking which model to use from
>         the command line would be nice. The patch seems abandoned
>         at this point, so I might contact the author and ask if
>         he minds me picking it up and continuing to polish it until
>         it's acceptable :)

Yay, please do that!

>       - virtio-net works with an "aftermarket" driver, verified to
>         work both in MountainLion and Mavericks. It's what I'm using
>         right now.
> AFAIK, that's everything :)

For older OSX we need the mwait nop hack right?

> There's a GSoC student (Reza Jelveh) who will be working on trying
> booting OS X with OVMF (piix only for now).
> I'm toying with the idea of maybe getting OVMF to work with Q35,
> but I have absolutely no idea yet how big of a job that might be,
> and whether I'm mentally equipped to tackle it myself, in my "spare time" :)
> Last but not least, I keep a "current state of OS X on QEMU/KVM"
> writeup online at
> http://www.contrib.andrew.cmu.edu/~somlo/OSXKVM/
> so any new and interesting developments should show up there in a
> reasonably timely way...
> Cheers,
> --Gabriel

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