[Xen-devel] [PATCH 1 of 8] Tools: Do not assume sharing target is dom0 in libxc wrappers

[Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>]

 tools/libxc/xc_memshr.c |  3 ++-
 tools/libxc/xenctrl.h   |  1 +
 2 files changed, 3 insertions(+), 1 deletions(-)


The libxc wrapper that shares two pages always assumed one
of the pages was mapped by dom0. Expand the API to specify
both sharing domains.

Signed-off-by: Andres Lagar-Cavilla <andres@xxxxxxxxxxxxxxxx>

diff -r 835be7c121b7 -r 6f58de995103 tools/libxc/xc_memshr.c
--- a/tools/libxc/xc_memshr.c
+++ b/tools/libxc/xc_memshr.c
@@ -87,6 +87,7 @@ int xc_memshr_nominate_gref(xc_interface
 }
 
 int xc_memshr_share(xc_interface *xch,
+                    uint32_t source_domain,
                     uint64_t source_handle,
                     uint64_t client_handle)
 {
@@ -95,7 +96,7 @@ int xc_memshr_share(xc_interface *xch,
 
     domctl.cmd = XEN_DOMCTL_mem_sharing_op;
     domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
-    domctl.domain = 0;
+    domctl.domain = (domid_t) source_domain;
     op = &(domctl.u.mem_sharing_op);
     op->op = XEN_DOMCTL_MEM_EVENT_OP_SHARING_SHARE;
     op->u.share.source_handle = source_handle;
diff -r 835be7c121b7 -r 6f58de995103 tools/libxc/xenctrl.h
--- a/tools/libxc/xenctrl.h
+++ b/tools/libxc/xenctrl.h
@@ -1892,6 +1892,7 @@ int xc_memshr_nominate_gref(xc_interface
                             grant_ref_t gref,
                             uint64_t *handle);
 int xc_memshr_share(xc_interface *xch,
+                    uint32_t source_domain,
                     uint64_t source_handle,
                     uint64_t client_handle);
 int xc_memshr_domain_resume(xc_interface *xch,

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