[PATCH v4 28/28] tools/libxc: Add viommu operations in libxc

[Chao Gao <chao.gao@intel.com>]

Add libxc helpers for XEN_DOMCTL_viommu_op. Now, it has one sub-command
- create(): create a vIOMMU in Xen, given viommu type, register-set
            location and capabilities

Signed-off-by: Chao Gao <chao.gao@intel.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
---
v4:
 - remove destroy() sub-command
v3:
 - Remove API for querying viommu capabilities
 - Remove pointless cast
 - Polish commit message
 - Coding style
---
 tools/libxc/Makefile          |  1 +
 tools/libxc/include/xenctrl.h |  3 +++
 tools/libxc/xc_viommu.c       | 51 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 55 insertions(+)
 create mode 100644 tools/libxc/xc_viommu.c

diff --git a/tools/libxc/Makefile b/tools/libxc/Makefile
index 9a019e8..7d8c4b4 100644
--- a/tools/libxc/Makefile
+++ b/tools/libxc/Makefile
@@ -51,6 +51,7 @@ CTRL_SRCS-$(CONFIG_MiniOS) += xc_minios.c
 CTRL_SRCS-y       += xc_evtchn_compat.c
 CTRL_SRCS-y       += xc_gnttab_compat.c
 CTRL_SRCS-y       += xc_devicemodel_compat.c
+CTRL_SRCS-y       += xc_viommu.c
 
 GUEST_SRCS-y :=
 GUEST_SRCS-y += xg_private.c xc_suspend.c
diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 8ade90c..69cf03f 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -2537,6 +2537,9 @@ enum xc_static_cpu_featuremask {
 const uint32_t *xc_get_static_cpu_featuremask(enum xc_static_cpu_featuremask);
 const uint32_t *xc_get_feature_deep_deps(uint32_t feature);
 
+int xc_viommu_create(xc_interface *xch, domid_t dom, uint64_t type,
+                     uint64_t base_addr, uint64_t cap, uint32_t *viommu_id);
+
 #endif
 
 int xc_livepatch_upload(xc_interface *xch,
diff --git a/tools/libxc/xc_viommu.c b/tools/libxc/xc_viommu.c
new file mode 100644
index 0000000..a72b2f4
--- /dev/null
+++ b/tools/libxc/xc_viommu.c
@@ -0,0 +1,51 @@
+/*
+ * xc_viommu.c
+ *
+ * viommu related API functions.
+ *
+ * Copyright (C) 2017 Intel Corporation
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License, version 2.1, as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "xc_private.h"
+
+int xc_viommu_create(xc_interface *xch, domid_t dom, uint64_t type,
+                     uint64_t base_addr, uint64_t cap, uint32_t *viommu_id)
+{
+    int rc;
+    DECLARE_DOMCTL;
+
+    domctl.cmd = XEN_DOMCTL_viommu_op;
+    domctl.domain = dom;
+    domctl.u.viommu_op.cmd = XEN_DOMCTL_viommu_create;
+    domctl.u.viommu_op.u.create.type = type;
+    domctl.u.viommu_op.u.create.base_address = base_addr;
+    domctl.u.viommu_op.u.create.capabilities = cap;
+
+    rc = do_domctl(xch, &domctl);
+    if ( !rc )
+        *viommu_id = domctl.u.viommu_op.u.create.id;
+
+    return rc;
+}
+
+/*
+ * Local variables:
+ * mode: C
+ * c-file-style: "BSD"
+ * c-basic-offset: 4
+ * tab-width: 4
+ * indent-tabs-mode: nil
+ * End:
+ */
-- 
1.8.3.1


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