Hi,
On 19/08/2021 13:12, Jan Beulich wrote:
On 19.08.2021 14:02, Rahul Singh wrote:
--- a/xen/arch/arm/domctl.c
+++ b/xen/arch/arm/domctl.c
@@ -173,6 +173,8 @@ long arch_do_domctl(struct xen_domctl *domctl, struct
domain *d,
return rc;
}
+ case XEN_DOMCTL_ioport_permission:
+ return 0;
I don't think returning success for something that doesn't make
much sense in the first place (there aren't truly "I/O ports" on
Arm afaik) is a good idea.
They are memory mapped. IIRC, there is a region that is reserved to fake
them (for PCI cards that still using them).
Instead I think the tool stack should
avoid making arch-specific calls in an arch-independent way.
+1. The current approach means that it will be impossible to implement
those sub operations without breaking Xen if we ever needs it.
Cheers,
--
Julien Grall
