hw/xen: Implement GNTTABOP_query_size

[qmiga/qemu.git] / target / i386 / kvm / xen-emu.c

diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index d49b611..3b46cab 100644 (file)
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -1207,7 +1207,21 @@ static bool kvm_xen_hcall_gnttab_op(struct kvm_xen_exit *exit, X86CPU *cpu,
         }
         break;
     }
-    case GNTTABOP_query_size:
+    case GNTTABOP_query_size: {
+        struct gnttab_query_size size;
+
+        qemu_build_assert(sizeof(size) == 16);
+        if (kvm_copy_from_gva(cs, arg, &size, sizeof(size))) {
+            err = -EFAULT;
+            break;
+        }
+
+        err = xen_gnttab_query_size_op(&size);
+        if (!err && kvm_copy_to_gva(cs, arg, &size, sizeof(size))) {
+            err = -EFAULT;
+        }
+        break;
+    }
     case GNTTABOP_setup_table:
     case GNTTABOP_copy:
     case GNTTABOP_map_grant_ref: