[SeaBIOS] ohci bulk?

Gerd Hoffmann kraxel at redhat.com
Mon Nov 22 15:49:08 CET 2010

On 11/22/10 14:47, Kevin O'Connor wrote:
> On Mon, Nov 22, 2010 at 11:52:56AM +0100, Gerd Hoffmann wrote:

 >>> [ access pci bars from real mode ]

>> Hmm, how about having a virtual "I/O bounce" device?  Allocate two
>> dwords in I/O space.  One dword for the address, one for the data.
>> reads and writes to the data register will be bounced to the address
>> written into the address register.
> It could work.  However, having the ability to go into full 32bit mode
> would be more flexible.

Indeed, and it would also allow to move bios code into high memory.

>> On real hardware seabios could emulate this using SMM.
>> On virtual hardware qemu could emulate this so we don't need SMM
>> support in kvm.
> How hard would it be to add SMM support into kvm?

Dunno.  As I understand it the biggest issue is that kvm needs complete 
instruction emulation for big real mode as intel vmx supports protected 
mode only.  Correct Avi?


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