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/******************************************************************************
*
* tools/libxc/xc_mem_paging.c
*
* Interface to low-level memory paging functionality.
*
* Copyright (c) 2009 by Citrix Systems, Inc. (Patrick Colp)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "xc_private.h"
int xc_mem_paging_enable(xc_interface *xch, domid_t domain_id,
uint32_t *port)
{
if ( !port )
{
errno = EINVAL;
return -1;
}
return xc_mem_event_control(xch, domain_id,
XEN_DOMCTL_MEM_EVENT_OP_PAGING_ENABLE,
XEN_DOMCTL_MEM_EVENT_OP_PAGING,
port);
}
int xc_mem_paging_disable(xc_interface *xch, domid_t domain_id)
{
return xc_mem_event_control(xch, domain_id,
XEN_DOMCTL_MEM_EVENT_OP_PAGING_DISABLE,
XEN_DOMCTL_MEM_EVENT_OP_PAGING,
NULL);
}
int xc_mem_paging_nominate(xc_interface *xch, domid_t domain_id, unsigned long gfn)
{
return xc_mem_event_memop(xch, domain_id,
XENMEM_paging_op_nominate,
XENMEM_paging_op,
gfn, NULL);
}
int xc_mem_paging_evict(xc_interface *xch, domid_t domain_id, unsigned long gfn)
{
return xc_mem_event_memop(xch, domain_id,
XENMEM_paging_op_evict,
XENMEM_paging_op,
gfn, NULL);
}
int xc_mem_paging_prep(xc_interface *xch, domid_t domain_id, unsigned long gfn)
{
return xc_mem_event_memop(xch, domain_id,
XENMEM_paging_op_prep,
XENMEM_paging_op,
gfn, NULL);
}
int xc_mem_paging_load(xc_interface *xch, domid_t domain_id,
unsigned long gfn, void *buffer)
{
int rc, old_errno;
errno = -EINVAL;
if ( !buffer )
return -1;
if ( ((unsigned long) buffer) & (XC_PAGE_SIZE - 1) )
return -1;
if ( mlock(buffer, XC_PAGE_SIZE) )
return -1;
rc = xc_mem_event_memop(xch, domain_id,
XENMEM_paging_op_prep,
XENMEM_paging_op,
gfn, buffer);
old_errno = errno;
munlock(buffer, XC_PAGE_SIZE);
errno = old_errno;
return rc;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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