Re: [Qemu-devel] [sneak preview] major scsi overhaul

[Avi Kivity <avi@redhat.com>]

On 11/09/2009 11:08 AM, Gerd Hoffmann wrote:
>
>> You are also moving the compilation to Makefile.hw, which is not
>> exactly an improvement. Is this needed because of the QEMUIOVector
>> stuff?
>
> Almost correct ;)
>
> It is because of QEMUSGList which drags in a target_phys_addr_t 
> dependency.

As Michael notes, devices have physical address sizes independent of the 
target platform; a PCI device that supports 64-bit addresses can be 
plugged into a motherboard that supports 32-bit address bus processors.

We can fix this in several ways:
- creating QEMUSG64List and QEMUSG32List (and typedefing PCISGList to 
the former)
- making QEMUSGList always use 64-bit addresses since it will almost 
always be used with devices (which are often 64-bit capable)
- making target_phys_addr_t always 64-bit (which loses some performance 
with 32-on-32 emulation)
- others?

-- 
error compiling committee.c: too many arguments to function