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/******************************************************************************
* xc_tmem.c
*
* Copyright (C) 2008 Oracle Corp.
*/
#include "xc_private.h"
#include <xen/tmem.h>
static int do_tmem_op(int xc, tmem_op_t *op)
{
int ret;
DECLARE_HYPERCALL;
hypercall.op = __HYPERVISOR_tmem_op;
hypercall.arg[0] = (unsigned long)op;
if (lock_pages(op, sizeof(*op)) != 0)
{
PERROR("Could not lock memory for Xen hypercall");
return -EFAULT;
}
if ((ret = do_xen_hypercall(xc, &hypercall)) < 0)
{
if ( errno == EACCES )
DPRINTF("tmem operation failed -- need to"
" rebuild the user-space tool set?\n");
}
unlock_pages(op, sizeof(*op));
return ret;
}
int xc_tmem_control(int xc,
int32_t pool_id,
uint32_t subop,
uint32_t cli_id,
uint32_t arg1,
uint32_t arg2,
void *buf)
{
tmem_op_t op;
int rc;
op.cmd = TMEM_CONTROL;
op.pool_id = pool_id;
op.u.ctrl.subop = subop;
op.u.ctrl.cli_id = cli_id;
op.u.ctrl.arg1 = arg1;
op.u.ctrl.arg2 = arg2;
op.u.ctrl.buf.p = buf;
if (subop == TMEMC_LIST) {
if ((arg1 != 0) && (lock_pages(buf, arg1) != 0))
{
PERROR("Could not lock memory for Xen hypercall");
return -ENOMEM;
}
}
#ifdef VALGRIND
if (arg1 != 0)
memset(buf, 0, arg1);
#endif
rc = do_tmem_op(xc, &op);
if (subop == TMEMC_LIST) {
if (arg1 != 0)
unlock_pages(buf, arg1);
}
return rc;
}
/*
* Local variables:
* mode: C
* c-set-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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