[RFC 13/19] xen/iommu: arm: Wire iommu DOMCTL for ARM

[Julien Grall <julien.grall@linaro.org>]

The call iommu_do_domctl is similar as the x86 one. Move this code to
the common code and protected by HAS_PASSTHROUGH.

Signed-off-by: Julien Grall <julien.grall@linaro.org>
Cc: Keir Fraser <keir@xen.org>
Cc: Jan Beulich <jbeulich@suse.com>
---
 xen/arch/x86/domctl.c |    2 +-
 xen/common/domctl.c   |    4 ++++
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/xen/arch/x86/domctl.c b/xen/arch/x86/domctl.c
index 437ba11..ffecc15 100644
--- a/xen/arch/x86/domctl.c
+++ b/xen/arch/x86/domctl.c
@@ -1320,7 +1320,7 @@ long arch_do_domctl(
     break;
 
     default:
-        ret = iommu_do_domctl(domctl, d, u_domctl);
+        ret = -ENOSYS;
         break;
     }
 
diff --git a/xen/common/domctl.c b/xen/common/domctl.c
index 5d3ac87..85866b7 100644
--- a/xen/common/domctl.c
+++ b/xen/common/domctl.c
@@ -1028,6 +1028,10 @@ long do_domctl(XEN_GUEST_HANDLE_PARAM(xen_domctl_t) u_domctl)
 
     default:
         ret = arch_do_domctl(op, d, u_domctl);
+#ifdef HAS_PASSTHROUGH
+        if ( ret == -ENOSYS )
+            ret = iommu_do_domctl(op, d, u_domctl);
+#endif
         break;
     }
 
-- 
1.7.10.4