[Xen-devel] [PATCH 17 of 25] libxc: convert mmuext op interface over to hypercall buffers

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1287756891 -3600
# Node ID 571e4fd050f7ae7cad9a94c94f9be79acf55710d
# Parent  63c5a929ae7ca0c82406e0cd33f95c82f219d59f
libxc: convert mmuext op interface over to hypercall buffers

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

diff -r 63c5a929ae7c -r 571e4fd050f7 tools/libxc/xc_private.c
--- a/tools/libxc/xc_private.c  Fri Oct 22 15:14:51 2010 +0100
+++ b/tools/libxc/xc_private.c  Fri Oct 22 15:14:51 2010 +0100
@@ -343,23 +343,24 @@ int xc_mmuext_op(
     domid_t dom)
 {
     DECLARE_HYPERCALL;
+    DECLARE_HYPERCALL_BOUNCE(op, nr_ops*sizeof(*op), 
XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
     long ret = -EINVAL;
 
-    if ( hcall_buf_prep(xch, (void **)&op, nr_ops*sizeof(*op)) != 0 )
+    if ( xc_hypercall_bounce_pre(xch, op) )
     {
-        PERROR("Could not lock memory for Xen hypercall");
+        PERROR("Could not bounce memory for mmuext op hypercall");
         goto out1;
     }
 
     hypercall.op     = __HYPERVISOR_mmuext_op;
-    hypercall.arg[0] = (unsigned long)op;
+    hypercall.arg[0] = HYPERCALL_BUFFER_AS_ARG(op);
     hypercall.arg[1] = (unsigned long)nr_ops;
     hypercall.arg[2] = (unsigned long)0;
     hypercall.arg[3] = (unsigned long)dom;
 
     ret = do_xen_hypercall(xch, &hypercall);
 
-    hcall_buf_release(xch, (void **)&op, nr_ops*sizeof(*op));
+    xc_hypercall_bounce_post(xch, op);
 
  out1:
     return ret;
@@ -369,22 +370,23 @@ static int flush_mmu_updates(xc_interfac
 {
     int err = 0;
     DECLARE_HYPERCALL;
+    DECLARE_NAMED_HYPERCALL_BOUNCE(updates, mmu->updates, 
mmu->idx*sizeof(*mmu->updates), XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
 
     if ( mmu->idx == 0 )
         return 0;
 
+    if ( xc_hypercall_bounce_pre(xch, updates) )
+    {
+        PERROR("flush_mmu_updates: bounce buffer failed");
+        err = 1;
+        goto out;
+    }
+
     hypercall.op     = __HYPERVISOR_mmu_update;
-    hypercall.arg[0] = (unsigned long)mmu->updates;
+    hypercall.arg[0] = HYPERCALL_BUFFER_AS_ARG(updates);
     hypercall.arg[1] = (unsigned long)mmu->idx;
     hypercall.arg[2] = 0;
     hypercall.arg[3] = mmu->subject;
-
-    if ( lock_pages(xch, mmu->updates, sizeof(mmu->updates)) != 0 )
-    {
-        PERROR("flush_mmu_updates: mmu updates lock_pages failed");
-        err = 1;
-        goto out;
-    }
 
     if ( do_xen_hypercall(xch, &hypercall) < 0 )
     {
@@ -394,7 +396,7 @@ static int flush_mmu_updates(xc_interfac
 
     mmu->idx = 0;
 
-    unlock_pages(xch, mmu->updates, sizeof(mmu->updates));
+    xc_hypercall_bounce_post(xch, updates);
 
  out:
     return err;

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