| Message ID | 20200221112049.3077-4-pdurrant@amazon.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | xl/libxl: domid allocation/preservation changes | expand |
On 21/02/2020 11:20, Paul Durrant wrote: > A subsequent patch will modify libxl to allow selection of a random domid > value when creating domains. Valid values are limited to a width of 15 bits, > so add an appropriate mask definition to the public header. > > NOTE: It is reasonable for this mask definition to be in a Xen public header > rather than in, say, a libxenctrl header since it relates to the > validity of a value passed to XEN_DOMCTL_createdomain. This new > definition is placed in xen.h rather than domctl.h only to co-locate > it with other domid-related defitions. > > Signed-off-by: Paul Durrant <pdurrant@amazon.com> > Reviewed-by: Ian Jackson <ian.jackson@eu.citrix.com> Acked-by: Julien Grall <julien@xen.org> Cheers,
diff --git a/xen/include/public/xen.h b/xen/include/public/xen.h index d2198dffad..75b1619d0d 100644 --- a/xen/include/public/xen.h +++ b/xen/include/public/xen.h @@ -614,6 +614,9 @@ DEFINE_XEN_GUEST_HANDLE(mmuext_op_t); /* Idle domain. */ #define DOMID_IDLE xen_mk_uint(0x7FFF) +/* Mask for valid domain id values */ +#define DOMID_MASK xen_mk_uint(0x7FFF) + #ifndef __ASSEMBLY__ typedef uint16_t domid_t;
A subsequent patch will modify libxl to allow selection of a random domid value when creating domains. Valid values are limited to a width of 15 bits, so add an appropriate mask definition to the public header. NOTE: It is reasonable for this mask definition to be in a Xen public header rather than in, say, a libxenctrl header since it relates to the validity of a value passed to XEN_DOMCTL_createdomain. This new definition is placed in xen.h rather than domctl.h only to co-locate it with other domid-related defitions. Signed-off-by: Paul Durrant <pdurrant@amazon.com> Reviewed-by: Ian Jackson <ian.jackson@eu.citrix.com> --- Cc: Andrew Cooper <andrew.cooper3@citrix.com> Cc: George Dunlap <George.Dunlap@eu.citrix.com> Cc: Jan Beulich <jbeulich@suse.com> Cc: Julien Grall <julien@xen.org> Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: Wei Liu <wl@xen.org> v6: - New in v6 (split out from another patch) --- xen/include/public/xen.h | 3 +++ 1 file changed, 3 insertions(+)