Interfaces to memshr domctls.

Signed-off-by: Grzegorz Milos <Grzegorz.Milos@citrix.com>

1 files changed, 172 insertions, 0 deletions

diff --git a/tools/libxc/xc_memshr.c b/tools/libxc/xc_memshr.c
new file mode 100644
index 0000000000..13a751aadf
--- /dev/null
+++ b/tools/libxc/xc_memshr.c
@@ -0,0 +1,172 @@
+/******************************************************************************
+ *
+ * xc_memshr.c
+ *
+ * Interface to low-level memory sharing functionality.
+ *
+ * Copyright (c) 2009 Citrix (R&D) Inc. (Grzegorz Milos)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "xc_private.h"
+#include <xen/memory.h>
+#include <xen/grant_table.h>
+
+int xc_memshr_control(int xc_handle,
+                      uint32_t domid,
+                      int enable)
+{
+    DECLARE_DOMCTL;
+    struct xen_domctl_mem_sharing_op *op;
+
+    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
+    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
+    domctl.domain = (domid_t)domid;
+    op = &(domctl.u.mem_sharing_op);
+    op->op = XEN_DOMCTL_MEM_SHARING_OP_CONTROL;
+    op->enable = enable;
+
+    return do_domctl(xc_handle, &domctl);
+}
+
+int xc_memshr_nominate_gfn(int xc_handle,
+                           uint32_t domid,
+                           unsigned long gfn,
+                           uint64_t *handle)
+{
+    DECLARE_DOMCTL;
+    struct xen_domctl_mem_sharing_op *op;
+    int ret;
+
+    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
+    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
+    domctl.domain = (domid_t)domid;
+    op = &(domctl.u.mem_sharing_op);
+    op->op = XEN_DOMCTL_MEM_SHARING_OP_NOMINATE_GFN;
+    op->nominate.gfn = gfn;
+
+    ret = do_domctl(xc_handle, &domctl);
+    if(!ret) *handle = op->nominate.handle; 
+
+    return ret;
+}
+
+int xc_memshr_nominate_gref(int xc_handle,
+                            uint32_t domid,
+                            grant_ref_t gref,
+                            uint64_t *handle)
+{
+    DECLARE_DOMCTL;
+    struct xen_domctl_mem_sharing_op *op;
+    int ret;
+
+    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
+    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
+    domctl.domain = (domid_t)domid;
+    op = &(domctl.u.mem_sharing_op);
+    op->op = XEN_DOMCTL_MEM_SHARING_OP_NOMINATE_GREF;
+    op->nominate.grant_ref = gref;
+
+    ret = do_domctl(xc_handle, &domctl);
+    if(!ret) *handle = op->nominate.handle; 
+
+    return ret;
+}
+
+int xc_memshr_share(int xc_handle,
+                    uint64_t source_handle,
+                    uint64_t client_handle)
+{
+    DECLARE_DOMCTL;
+    struct xen_domctl_mem_sharing_op *op;
+
+    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
+    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
+    domctl.domain = 0;
+    op = &(domctl.u.mem_sharing_op);
+    op->op = XEN_DOMCTL_MEM_SHARING_OP_SHARE;
+    op->share.source_handle = source_handle;
+    op->share.client_handle = client_handle;
+
+    return do_domctl(xc_handle, &domctl);
+}
+
+int xc_memshr_domain_resume(int xc_handle,
+                            uint32_t domid)
+{
+    DECLARE_DOMCTL;
+    struct xen_domctl_mem_sharing_op *op;
+
+    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
+    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
+    domctl.domain = (domid_t)domid;
+    op = &(domctl.u.mem_sharing_op);
+    op->op = XEN_DOMCTL_MEM_SHARING_OP_RESUME;
+
+    return do_domctl(xc_handle, &domctl);
+}
+
+int xc_memshr_debug_gfn(int xc_handle,
+                        uint32_t domid,
+                        unsigned long gfn)
+{
+    DECLARE_DOMCTL;
+    struct xen_domctl_mem_sharing_op *op;
+
+    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
+    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
+    domctl.domain = (domid_t)domid;
+    op = &(domctl.u.mem_sharing_op);
+    op->op = XEN_DOMCTL_MEM_SHARING_OP_DEBUG_GFN;
+    op->debug.gfn = gfn;
+
+    return do_domctl(xc_handle, &domctl);
+}
+
+int xc_memshr_debug_mfn(int xc_handle,
+                        uint32_t domid,
+                        unsigned long mfn)
+{
+    DECLARE_DOMCTL;
+    struct xen_domctl_mem_sharing_op *op;
+
+    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
+    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
+    domctl.domain = (domid_t)domid;
+    op = &(domctl.u.mem_sharing_op);
+    op->op = XEN_DOMCTL_MEM_SHARING_OP_DEBUG_MFN;
+    op->debug.mfn = mfn;
+
+    return do_domctl(xc_handle, &domctl);
+}
+
+int xc_memshr_debug_gref(int xc_handle,
+                         uint32_t domid,
+                         grant_ref_t gref)
+{
+    DECLARE_DOMCTL;
+    struct xen_domctl_mem_sharing_op *op;
+
+    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
+    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
+    domctl.domain = (domid_t)domid;
+    op = &(domctl.u.mem_sharing_op);
+    op->op = XEN_DOMCTL_MEM_SHARING_OP_DEBUG_GREF;
+    op->debug.gref = gref;
+
+    return do_domctl(xc_handle, &domctl);
+}
+