[Xen-devel] [PATCH 22 of 24] libxc: convert mca interface over to hypercall buffers

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1283779691 -3600
# Node ID 649c4386d5904838f801d30e908b0f3bb1387d2c
# Parent  413c6e963a87945e05a8fc1eb761c1e976445d9c
libxc: convert mca interface over to hypercall buffers

Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>

diff -r 413c6e963a87 -r 649c4386d590 tools/libxc/xc_misc.c
--- a/tools/libxc/xc_misc.c     Mon Sep 06 14:28:11 2010 +0100
+++ b/tools/libxc/xc_misc.c     Mon Sep 06 14:28:11 2010 +0100
@@ -153,18 +153,19 @@ int xc_mca_op(xc_interface *xch, struct 
 {
     int ret = 0;
     DECLARE_HYPERCALL;
+    DECLARE_HYPERCALL_BOUNCE(mc, sizeof(*mc), XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
 
-    mc->interface_version = XEN_MCA_INTERFACE_VERSION;
-    if ( lock_pages(xch, mc, sizeof(*mc)) )
+    if ( xc_hypercall_bounce_pre(xch, mc) )
     {
         PERROR("Could not lock xen_mc memory");
-        return -EINVAL;
+        return -1;
     }
+    mc->interface_version = XEN_MCA_INTERFACE_VERSION;
 
     hypercall.op = __HYPERVISOR_mca;
-    hypercall.arg[0] = (unsigned long)mc;
+    hypercall.arg[0] = HYPERCALL_BUFFER_AS_ARG(mc);
     ret = do_xen_hypercall(xch, &hypercall);
-    unlock_pages(xch, mc, sizeof(*mc));
+    xc_hypercall_bounce_post(xch, mc);
     return ret;
 }
 #endif

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel