Re: [Xen-devel] Little help with blk ring

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Tue, 2012-05-15 at 12:09 +0100, Daniel Castro wrote:
> On Wed, May 9, 2012 at 5:18 PM, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> > On Wed, 2012-05-09 at 08:54 +0100, James Harper wrote:
> >> >
> >> > I am writing the PV Driver front end in Seabios.
> >> >
> >> > Could you explain your method in a little more detail please?
> >> >
> >>
> >> I'm not sure that my way is the best way. The existing linux pv
> >> drivers should do what you want - have a look at the source. If you
> >> really want to look at my code you can get it from hg and have a look.
> >> It's in the xenvbd driver.
> >>
> >> And I think I got it backwards in a previous email. It seems that the
> >> frontend writes the protocol into the xenstore, eg "x86_64-abi" for 64
> >> bit.
> I was not doing this, now it is written in xenstore, as IanÂs
> suggestion 32-abi, yet the same problem persists...
> After RING RESPONSE 0x0009a040
> status:9
> operation 0
> id:256
> This above is the content of the response. The id should be 9. If I
> change the id the response status will change to the same number. Any
> ideas?

Compare the layout and data sizes of the members of your request and
response structures very carefully with the ones in xen/include/public.

Ian.



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