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https://github.com/xen-project/xen.git
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Andres Lagar-Cavilla
49aabd5cf1
Signed-off-by: Andres Lagar-Cavilla <andres@lagarcavilla.org> Acked-by: Ian Jackson <ian.jackson@eu.citrix.com> Committed-by: Tim Deegan <tim@xen.org>
108 lines
3.6 KiB
C
108 lines
3.6 KiB
C
/******************************************************************************
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*
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* tools/libxc/xc_mem_paging.c
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*
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* Interface to low-level memory paging functionality.
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*
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* Copyright (c) 2009 by Citrix Systems, Inc. (Patrick Colp)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xc_private.h"
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int xc_mem_paging_enable(xc_interface *xch, domid_t domain_id,
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void *shared_page, void *ring_page)
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{
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return xc_mem_event_control(xch, domain_id,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING_ENABLE,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING,
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shared_page, ring_page, INVALID_MFN);
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}
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int xc_mem_paging_disable(xc_interface *xch, domid_t domain_id)
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{
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return xc_mem_event_control(xch, domain_id,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING_DISABLE,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING,
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NULL, NULL, INVALID_MFN);
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}
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int xc_mem_paging_nominate(xc_interface *xch, domid_t domain_id, unsigned long gfn)
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{
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return xc_mem_event_control(xch, domain_id,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING_NOMINATE,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING,
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NULL, NULL, gfn);
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}
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int xc_mem_paging_evict(xc_interface *xch, domid_t domain_id, unsigned long gfn)
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{
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return xc_mem_event_control(xch, domain_id,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING_EVICT,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING,
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NULL, NULL, gfn);
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}
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int xc_mem_paging_prep(xc_interface *xch, domid_t domain_id, unsigned long gfn)
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{
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return xc_mem_event_control(xch, domain_id,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING_PREP,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING,
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NULL, NULL, gfn);
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}
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int xc_mem_paging_load(xc_interface *xch, domid_t domain_id,
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unsigned long gfn, void *buffer)
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{
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int rc;
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if ( !buffer )
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return -EINVAL;
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if ( ((unsigned long) buffer) & (XC_PAGE_SIZE - 1) )
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return -EINVAL;
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if ( mlock(buffer, XC_PAGE_SIZE) )
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return -errno;
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rc = xc_mem_event_control(xch, domain_id,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING_PREP,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING,
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buffer, NULL, gfn);
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(void)munlock(buffer, XC_PAGE_SIZE);
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return rc;
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}
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int xc_mem_paging_resume(xc_interface *xch, domid_t domain_id, unsigned long gfn)
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{
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return xc_mem_event_control(xch, domain_id,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING_RESUME,
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XEN_DOMCTL_MEM_EVENT_OP_PAGING,
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NULL, NULL, gfn);
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}
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/*
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* Local variables:
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* mode: C
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* c-set-style: "BSD"
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* c-basic-offset: 4
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* indent-tabs-mode: nil
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* End:
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*/
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