Re: How to change PCI Configuration space?

Rajat Jain
2005-08-31T01:05:39Z

On 8/31/05, chuck gelm <chuck@gelm.net> wrote:
> Rajat Jain wrote:
> > Hi List,
> >
> > I want to change the PCI Configuration space of a particular device in
> > my system. I am trying to use the "pcitweak" utility to do so, but am
> > not suceeding. I would appreciate if some body could provide me any
> > pointers in how to do so.
> >
> > In this case, I want to change the value at offset 64:
> >
> > $ pcitweak -r 5:9:1 64
> > 0x01000001 //original value
> >
> > $ pcitweak -w 5:9:1 64 0x02000002 //new value
> >
> > $ pcitweak -r 5:9:1 64
> > 0x01000001 //no change?
> >
> > TIA,
> >
> > Rajat Jain
>
> Dear Rajat Jain:
>
> 'man pcitweak' indicates that it requires root privileges.
> the '$' prompt in your console indicates 'user' privileges.
> My 'root' prompt is a '#'.
> I suggest that you do not have 'root' privileges when
> executing a '-w' (write) command.
>
> HTH, Chuck
>
> "Pcitweak is a utility that can be used to examine or
> change registers in the PCI configuration space. On most
> platfoms pcitweak can only be run by the root user."
>

Un ... I'm sorry ... I put that "$" prompt manually here in this mail.
I AM the root and working on the "#" prompt. I would appreciate if
somebody can tell me any other commands than "pcitweak" and "setpci"
to change PCI configuration space.

Thanks & Regards,

Rajat Jain