Re: [Qemu-devel] osx bootloader

[Alexander Graf]

> Am 01.02.2014 um 01:38 schrieb BALATON Zoltan <address@hidden>:
> 
>> On Wed, 29 Jan 2014, Gabriel L. Somlo wrote:
>> I managed to boot OVMF following their wiki; It seems to work with kvm
>> enabled, but not with -M q35. My current command line is:
> 
> I've tried with the version compiled from the edk2 HEAD and that also fails 
> with -M q35. I've managed to get some debug output via the options described 
> in OVMF's readme file and the error is around where initialising the graphics 
> card. With q35 it stops with:
> 
> ASSERT .../edk2/MdePkg/Library/BaseIoLibIntrinsic/IoLibGcc.c(163): (Port & 3) 
> == 0
> 
> This function is IoRead32 and it says the port must be 32-bit aligned. I've 
> tried to find what port it tries to access but qemu -d ioport option 
> generates no output for me. Any hints on how to use this debug option of qemu?

The assert happens inside the guest, so I'm afraid you'll have to add debugging 
output to edk2. Just print out the port number if port & 3 in the code path 
above.

Alex

> 
> Regards,
> BALATON Zoltan