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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, see <http://www.gnu.org/licenses/>.
*/
#include "xc_private.h"
static int xc_mem_paging_memop(xc_interface *xch, uint32_t domain_id,
unsigned int op, uint64_t gfn, void *buffer)
{
xen_mem_paging_op_t mpo;
DECLARE_HYPERCALL_BOUNCE(buffer, XC_PAGE_SIZE,
XC_HYPERCALL_BUFFER_BOUNCE_IN);
int rc;
memset(&mpo, 0, sizeof(mpo));
mpo.op = op;
mpo.domain = domain_id;
mpo.gfn = gfn;
if ( buffer )
{
if ( xc_hypercall_bounce_pre(xch, buffer) )
{
PERROR("Could not bounce memory for XENMEM_paging_op %u", op);
return -1;
}
set_xen_guest_handle(mpo.buffer, buffer);
}
rc = xc_memory_op(xch, XENMEM_paging_op, &mpo, sizeof(mpo));
if ( buffer )
xc_hypercall_bounce_post(xch, buffer);
return rc;
}
int xc_mem_paging_enable(xc_interface *xch, uint32_t domain_id,
uint32_t *port)
{
if ( !port )
{
errno = EINVAL;
return -1;
}
return xc_vm_event_control(xch, domain_id,
XEN_VM_EVENT_ENABLE,
XEN_DOMCTL_VM_EVENT_OP_PAGING,
port);
}
int xc_mem_paging_disable(xc_interface *xch, uint32_t domain_id)
{
return xc_vm_event_control(xch, domain_id,
XEN_VM_EVENT_DISABLE,
XEN_DOMCTL_VM_EVENT_OP_PAGING,
NULL);
}
int xc_mem_paging_resume(xc_interface *xch, uint32_t domain_id)
{
return xc_vm_event_control(xch, domain_id,
XEN_VM_EVENT_RESUME,
XEN_DOMCTL_VM_EVENT_OP_PAGING,
NULL);
}
int xc_mem_paging_nominate(xc_interface *xch, uint32_t domain_id, uint64_t gfn)
{
return xc_mem_paging_memop(xch, domain_id,
XENMEM_paging_op_nominate,
gfn, NULL);
}
int xc_mem_paging_evict(xc_interface *xch, uint32_t domain_id, uint64_t gfn)
{
return xc_mem_paging_memop(xch, domain_id,
XENMEM_paging_op_evict,
gfn, NULL);
}
int xc_mem_paging_prep(xc_interface *xch, uint32_t domain_id, uint64_t gfn)
{
return xc_mem_paging_memop(xch, domain_id,
XENMEM_paging_op_prep,
gfn, NULL);
}
int xc_mem_paging_load(xc_interface *xch, uint32_t domain_id,
uint64_t gfn, void *buffer)
{
errno = EINVAL;
if ( !buffer )
return -1;
return xc_mem_paging_memop(xch, domain_id, XENMEM_paging_op_prep,
gfn, buffer);
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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