On 13/8/07 11:02, "Andre Przywara" <andre.przywara@xxxxxxx> wrote:
> @@ -35,6 +35,7 @@
> #define XENMEM_increase_reservation 0
> #define XENMEM_decrease_reservation 1
> #define XENMEM_populate_physmap 6
> +#define XENMEM_DEFAULT_CPU ((unsigned int)-1)
> struct xen_memory_reservation {
>
> /*
> @@ -66,6 +67,7 @@ struct xen_memory_reservation {
> * Unprivileged domains can specify only DOMID_SELF.
> */
> domid_t domid;
> + unsigned int cpu;
> };
We cannot change the size of existing hypercall structures. In this case we
could steal bits from address_bits field and create a pair of 16-bit fields
from it. Also, a physical cpu id is not a great fit for this hypercall -- it
is meaningless to most guests who do not see the physical cpu map. Better to
pass a vcpu_id and let Xen work out the most appropriate physical cpu id
based on the vcpu's affinity. Or have a concept of per-guest 'virtual node
identifiers' and pass a 'uint16_t vnodeid'. The latter might actually be a
nice abstraction -- it'd be good to know other people's thoughts on this?
 -- Keir
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