Re: [Qemu-devel] [Qemu-ppc] [PATCH 01/10] ppc: Fix rfi/rfid/hrfi/... emulation

[Alexander Graf]

On 20.06.16 09:08, Benjamin Herrenschmidt wrote:
> On Mon, 2016-06-20 at 08:35 +1000, Benjamin Herrenschmidt wrote:
>>  ,
>> Ok so Darwin uses some of the HSPRG etc... that we don't emulate on
>> the 970 so I suspect it never worked. I've added them but something
>> else breaks, I'll dig, I have the kernel source so it shouldn't be
>> too hard
>> ;-)
> 
> Well, it ended up being harder than I thought. In fact I'm not there
> yet ! So the Darwin VM layer dies early because HID5 isn't set
> properly, thus dcbz is doing 128 bytes clear instead of 32, clobbering
> things.
> 
> It looks like Apple's kernel doesn't set the right default in HID5, so
> we have to either do it in openbios or in qemu. Alex, what did you find

Uh, I'm fairy sure XNU sets HID5.

> out back in the day ? Or you never bothered running a 64-bit MacOS
> under PR KVM ?

I don't think I ever had 64bit Mac OS X working in TCG or KVM :).


Alex

> That fixed, it dies elsewhere in something related to page faults,
> still digging.
> 
> Cheers,
> Ben.
>