[Xen-devel] [PATCH 20 of 24] libxc: convert flask interfaces over to hypercall buffers

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1283779691 -3600
# Node ID 68dfe4921429a857123a5f926f30b54abf3f5f80
# Parent  30ca51399b65a029af07904ba9b0529ac99c0754
libxc: convert flask interfaces over to hypercall buffers

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

diff -r 30ca51399b65 -r 68dfe4921429 tools/libxc/xc_flask.c
--- a/tools/libxc/xc_flask.c    Mon Sep 06 14:28:11 2010 +0100
+++ b/tools/libxc/xc_flask.c    Mon Sep 06 14:28:11 2010 +0100
@@ -40,15 +40,16 @@ int xc_flask_op(xc_interface *xch, flask
 {
     int ret = -1;
     DECLARE_HYPERCALL;
+    DECLARE_HYPERCALL_BOUNCE(op, sizeof(*op), XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
 
-    hypercall.op     = __HYPERVISOR_xsm_op;
-    hypercall.arg[0] = (unsigned long)op;
-
-    if ( lock_pages(xch, op, sizeof(*op)) != 0 )
+    if ( xc_hypercall_bounce_pre(xch, op) )
     {
         PERROR("Could not lock memory for Xen hypercall");
         goto out;
     }
+
+    hypercall.op     = __HYPERVISOR_xsm_op;
+    hypercall.arg[0] = HYPERCALL_BUFFER_AS_ARG(op);
 
     if ( (ret = do_xen_hypercall(xch, &hypercall)) < 0 )
     {
@@ -56,7 +57,7 @@ int xc_flask_op(xc_interface *xch, flask
             fprintf(stderr, "XSM operation failed!\n");
     }
 
-    unlock_pages(xch, op, sizeof(*op));
+    xc_hypercall_bounce_post(xch, op);
 
  out:
     return ret;

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