Re: [Xen-devel] Changing semantics of ioperm() on Xen x86-64?

[Nivedita Singhvi <niv@xxxxxxxxxx>]

Ian Pratt wrote:
> > As part of the Xen x86-64 Linux port, we've changed the 
> > ioperm() syscall to always modify the IOPL instead of 
> > actually modifying the IO bitmap in the TSS like we do on 
> > x86-32.  Is there a particular reason for doing this?
>
> I don't believe so. io bitmap support was added to the hypervisor and
> the corresponding ioperm support got added on i386, but was never
> carried across to x86_64.
>
> We would definitely benefit from someone doing a code review of x86_64
> with a view to unifying as many of the xen patches with i386 as
> possible. There's certainly some needless/unhelpful divergence.
>
> Ian 
Above issue was caught by a LTP test case failure, btw...

thanks,
Nivedita

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel