# HG changeset patch
# User Ian Campbell <ian.campbell@xxxxxxxxxx>
# Date 1283779691 -3600
# Node ID afdedd2e14c342a381094df14de9446636780283
# Parent 649c4386d5904838f801d30e908b0f3bb1387d2c
libxc: convert tmem interface over to hypercall buffers
Signed-off-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
diff -r 649c4386d590 -r afdedd2e14c3 tools/libxc/xc_tmem.c
--- a/tools/libxc/xc_tmem.c Mon Sep 06 14:28:11 2010 +0100
+++ b/tools/libxc/xc_tmem.c Mon Sep 06 14:28:11 2010 +0100
@@ -25,21 +25,23 @@ static int do_tmem_op(xc_interface *xch,
{
int ret;
DECLARE_HYPERCALL;
+ DECLARE_HYPERCALL_BOUNCE(op, sizeof(*op), XC_HYPERCALL_BUFFER_BOUNCE_BOTH);
- hypercall.op = __HYPERVISOR_tmem_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");
return -EFAULT;
}
+
+ hypercall.op = __HYPERVISOR_tmem_op;
+ hypercall.arg[0] = HYPERCALL_BUFFER_AS_ARG(op);
if ((ret = do_xen_hypercall(xch, &hypercall)) < 0)
{
if ( errno == EACCES )
DPRINTF("tmem operation failed -- need to"
" rebuild the user-space tool set?\n");
}
- unlock_pages(xch, op, sizeof(*op));
+ xc_hypercall_bounce_post(xch, op);
return ret;
}
@@ -54,36 +56,41 @@ int xc_tmem_control(xc_interface *xch,
void *buf)
{
tmem_op_t op;
+ DECLARE_HYPERCALL_BOUNCE(buf, arg1, XC_HYPERCALL_BUFFER_BOUNCE_OUT);
int rc;
op.cmd = TMEM_CONTROL;
op.pool_id = pool_id;
op.u.ctrl.subop = subop;
op.u.ctrl.cli_id = cli_id;
- set_xen_guest_handle(op.u.ctrl.buf,buf);
op.u.ctrl.arg1 = arg1;
op.u.ctrl.arg2 = arg2;
op.u.ctrl.arg3 = arg3;
-
- if (subop == TMEMC_LIST) {
- if ((arg1 != 0) && (lock_pages(xch, buf, arg1) != 0))
- {
- PERROR("Could not lock memory for Xen hypercall");
- return -ENOMEM;
- }
- }
#ifdef VALGRIND
if (arg1 != 0)
memset(buf, 0, arg1);
#endif
+ if ( arg1 != 0 )
+ {
+ if ( buf == NULL )
+ return -EINVAL;
+ if ( xc_hypercall_bounce_pre(xch, buf) )
+ {
+ PERROR("Could not lock memory for Xen hypercall");
+ return -ENOMEM;
+ }
+
+ xc_set_xen_guest_handle(op.u.ctrl.buf, buf);
+ }
+ else
+ xc_set_xen_guest_handle(op.u.ctrl.buf, HYPERCALL_BUFFER_NULL);
+
rc = do_tmem_op(xch, &op);
- if (subop == TMEMC_LIST) {
- if (arg1 != 0)
- unlock_pages(xch, buf, arg1);
- }
+ if (arg1 != 0)
+ xc_hypercall_bounce_post(xch, buf);
return rc;
}
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel
|
Home