[PATCH V2 5/25] tools/libxc: Add viommu operations in libxc

[Lan Tianyu <tianyu.lan@intel.com>]

From: Chao Gao <chao.gao@intel.com>

This patch adds XEN_DOMCTL_viommu_op hypercall. This hypercall
comprises three sub-command:
- query capabilities of one specific type vIOMMU emulated by Xen
- create vIOMMU in Xen hypervisor, given viommu type, register-set location
and capabilities
- destroy vIOMMU specified by viommu_id

Signed-off-by: Chao Gao <chao.gao@intel.com>
Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
---
 tools/libxc/Makefile          |  1 +
 tools/libxc/include/xenctrl.h |  8 +++++
 tools/libxc/xc_viommu.c       | 81 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 90 insertions(+)
 create mode 100644 tools/libxc/xc_viommu.c

diff --git a/tools/libxc/Makefile b/tools/libxc/Makefile
index 28b1857..8724df5 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 bde8313..dfaa9d5 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -27,6 +27,7 @@
 #define __XEN_TOOLS__ 1
 #endif
 
+#include <errno.h>
 #include <unistd.h>
 #include <stddef.h>
 #include <stdint.h>
@@ -2499,6 +2500,13 @@ 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_query_cap(xc_interface *xch, domid_t dom,
+                        uint64_t type, uint64_t *cap);
+int xc_viommu_create(xc_interface *xch, domid_t dom, uint64_t type,
+                     uint64_t base_addr, uint64_t length, uint64_t cap,
+                     uint32_t *viommu_id);
+int xc_viommu_destroy(xc_interface *xch, domid_t dom, 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..04aae96
--- /dev/null
+++ b/tools/libxc/xc_viommu.c
@@ -0,0 +1,81 @@
+/*
+ * 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_query_cap(xc_interface *xch, domid_t dom,
+                        uint64_t type, uint64_t *cap)
+{
+    int rc;
+    DECLARE_DOMCTL;
+
+    domctl.cmd = XEN_DOMCTL_viommu_op;
+    domctl.domain = (domid_t)dom;
+    domctl.u.viommu_op.cmd = XEN_DOMCTL_query_viommu_caps;
+    domctl.u.viommu_op.u.query_caps.viommu_type = type;
+
+    rc = do_domctl(xch, &domctl);
+    if ( !rc )
+        *cap = domctl.u.viommu_op.u.query_caps.capabilities;
+    return rc;
+}
+
+int xc_viommu_create(xc_interface *xch, domid_t dom, uint64_t type,
+                     uint64_t base_addr, uint64_t length, uint64_t cap,
+                     uint32_t *viommu_id)
+{
+    int rc;
+    DECLARE_DOMCTL;
+
+    domctl.cmd = XEN_DOMCTL_viommu_op;
+    domctl.domain = (domid_t)dom;
+    domctl.u.viommu_op.cmd = XEN_DOMCTL_create_viommu;
+    domctl.u.viommu_op.u.create_viommu.viommu_type = type;
+    domctl.u.viommu_op.u.create_viommu.base_address = base_addr;
+    domctl.u.viommu_op.u.create_viommu.length = length;
+    domctl.u.viommu_op.u.create_viommu.capabilities = cap;
+
+    rc = do_domctl(xch, &domctl);
+    if ( !rc )
+        *viommu_id = domctl.u.viommu_op.u.create_viommu.viommu_id;
+    return rc;
+}
+
+int xc_viommu_destroy(xc_interface *xch, domid_t dom, uint32_t viommu_id)
+{
+    DECLARE_DOMCTL;
+
+    domctl.cmd = XEN_DOMCTL_viommu_op;
+    domctl.domain = (domid_t)dom;
+    domctl.u.viommu_op.cmd = XEN_DOMCTL_destroy_viommu;
+    domctl.u.viommu_op.u.destroy_viommu.viommu_id = viommu_id;
+
+    return do_domctl(xch, &domctl);
+}
+
+/*
+ * 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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