mirror of
https://github.com/xen-project/xen.git
synced 2026-10-29 02:30:03 +01:00
emellor@leeni.uk.xensource.com
a22292f2bb
Valgrind cannot see when a hypercall has initialised entries in a data structure, so appropriate memsets have been placed before using dom0_op_t, privcmd_hypercall_t, and a couple of miscellaneous blocks passed into this layer. This initialises the block so that valgrind considers it to be valid, but the data therein will be immediately overwritten by the hypercall, all being well. These changes are semantically neutral if -DVALGRIND is not set. Signed-off-by: Ewan Mellor <ewan@xensource.com>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/******************************************************************************
|
|
* xc_tbuf.c
|
|
*
|
|
* API for manipulating and accessing trace buffer parameters
|
|
*
|
|
* Copyright (c) 2005, Rob Gardner
|
|
*/
|
|
|
|
#include "xc_private.h"
|
|
|
|
int xc_tbuf_enable(int xc_handle, int enable)
|
|
{
|
|
DECLARE_DOM0_OP;
|
|
|
|
op.cmd = DOM0_TBUFCONTROL;
|
|
op.interface_version = DOM0_INTERFACE_VERSION;
|
|
if (enable)
|
|
op.u.tbufcontrol.op = DOM0_TBUF_ENABLE;
|
|
else
|
|
op.u.tbufcontrol.op = DOM0_TBUF_DISABLE;
|
|
|
|
return xc_dom0_op(xc_handle, &op);
|
|
}
|
|
|
|
int xc_tbuf_set_size(int xc_handle, uint32_t size)
|
|
{
|
|
DECLARE_DOM0_OP;
|
|
|
|
op.cmd = DOM0_TBUFCONTROL;
|
|
op.interface_version = DOM0_INTERFACE_VERSION;
|
|
op.u.tbufcontrol.op = DOM0_TBUF_SET_SIZE;
|
|
op.u.tbufcontrol.size = size;
|
|
|
|
return xc_dom0_op(xc_handle, &op);
|
|
}
|
|
|
|
int xc_tbuf_get_size(int xc_handle, uint32_t *size)
|
|
{
|
|
int rc;
|
|
DECLARE_DOM0_OP;
|
|
|
|
op.cmd = DOM0_TBUFCONTROL;
|
|
op.interface_version = DOM0_INTERFACE_VERSION;
|
|
op.u.tbufcontrol.op = DOM0_TBUF_GET_INFO;
|
|
|
|
rc = xc_dom0_op(xc_handle, &op);
|
|
if (rc == 0)
|
|
*size = op.u.tbufcontrol.size;
|
|
return rc;
|
|
}
|
|
|