xen: define gnttab_set_map_op/unmap_op

Impact: hypercall definitions

These functions populate the gnttab data structures used by the
granttab map and unmap ops and are used in the backend drivers.

Originally xen-unstable.hg 9625:c3bb51c443a7

[ Include Stefano's fix for phys_addr_t ]

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>

1 files changed, 38 insertions, 1 deletions

diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h
index 9a731706a016..1821aa103d82 100644
--- a/include/xen/grant_table.h
+++ b/include/xen/grant_table.h
@@ -37,10 +37,16 @@
 #ifndef __ASM_GNTTAB_H__
 #define __ASM_GNTTAB_H__
 
-#include <asm/xen/hypervisor.h>
+#include <asm/page.h>
+
+#include <xen/interface/xen.h>
 #include <xen/interface/grant_table.h>
+
+#include <asm/xen/hypervisor.h>
 #include <asm/xen/grant_table.h>
 
+#include <xen/features.h>
+
 /* NR_GRANT_FRAMES must be less than or equal to that configured in Xen */
 #define NR_GRANT_FRAMES 4
 
@@ -107,6 +113,37 @@ void gnttab_grant_foreign_access_ref(grant_ref_t ref, domid_t domid,
 void gnttab_grant_foreign_transfer_ref(grant_ref_t, domid_t domid,
                                        unsigned long pfn);
 
+static inline void
+gnttab_set_map_op(struct gnttab_map_grant_ref *map, phys_addr_t addr,
+                  uint32_t flags, grant_ref_t ref, domid_t domid)
+{
+        if (flags & GNTMAP_contains_pte)
+                map->host_addr = addr;
+        else if (xen_feature(XENFEAT_auto_translated_physmap))
+                map->host_addr = __pa(addr);
+        else
+                map->host_addr = addr;
+
+        map->flags = flags;
+        map->ref = ref;
+        map->dom = domid;
+}
+
+static inline void
+gnttab_set_unmap_op(struct gnttab_unmap_grant_ref *unmap, phys_addr_t addr,
+                    uint32_t flags, grant_handle_t handle)
+{
+        if (flags & GNTMAP_contains_pte)
+                unmap->host_addr = addr;
+        else if (xen_feature(XENFEAT_auto_translated_physmap))
+                unmap->host_addr = __pa(addr);
+        else
+                unmap->host_addr = addr;
+
+        unmap->handle = handle;
+        unmap->dev_bus_addr = 0;
+}
+
 int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes,
                            unsigned long max_nr_gframes,
                            struct grant_entry **__shared);