Re: [Xen-devel] 32-on-64: pvfb issue

[Gerd Hoffmann <kraxel@xxxxxxx>]

Markus Armbruster wrote:
> Gerd Hoffmann <kraxel@xxxxxxx> writes:
> 
>> +    ret = xenbus_printf(xbt, dev->nodename, "protocol", "%s",
>> +                        XEN_IO_PROTO_ABI_NATIVE);
>> +    if (ret)
>> +            goto error_xenbus;
> 
> This identifies the ABI, but how does it provide versioning?

#define XEN_IO_PROTO_FB_GRANT_TABLES "fb-grant-tables" ?

Just create a descriptive name you like.  Assuming we don't create
abi-dependent structs *again* when we change the protocol.

We can of course also just use XEN_IO_PROTO_ABI_NATIVE "-v2".  With the
protocol identifier being a string there lots of ways ...

cheers,
  Gerd

-- 
Gerd Hoffmann <kraxel@xxxxxxx>

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