Re: [Xen-devel] [PATCH] x86/domctl: Improve XEN_DOMCTL_hypercall_init error handling

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 11.03.15 at 13:56, <andrew.cooper3@xxxxxxxxxx> wrote:
> EACCES cannot be distinguished against an incorrect DOMCTL_INTERFACE_VERSION,
> and will cause an incorrect "need to rebuild the user-space tool set?" 
> message
> from libxc.  EINVAL is a perfectly reasonable alternative.

I'm okay with this for the !page case, but I think -EPERM or some
such would be better suited when the page is non-writable but
otherwise valid.

Jan




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