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https://github.com/xen-project/xen.git
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Tamas K Lengyel
4fa41d0504
Thus far mem_access and mem_sharing memops had been able to signal to Xen to start pulling responses off the corresponding rings. In this patch we retire these memops and add them to the option to the vm_event_op domctl. The vm_event_op domctl suboptions are the same for each ring thus we consolidate them into XEN_VM_EVENT_ENABLE/DISABLE/RESUME. As part of this patch in libxc we also rename the mem_access_enable/disable functions to monitor_enable/disable and move them into xc_monitor.c. Signed-off-by: Tamas K Lengyel <tamas.lengyel@zentific.com> Acked-by: Wei Liu <wei.liu2@citrix.com> Acked-by: Tim Deegan <tim@xen.org>
129 lines
3.6 KiB
C
129 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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static int xc_mem_paging_memop(xc_interface *xch, domid_t domain_id,
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unsigned int op, uint64_t gfn, void *buffer)
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{
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xen_mem_paging_op_t mpo;
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memset(&mpo, 0, sizeof(mpo));
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mpo.op = op;
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mpo.domain = domain_id;
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mpo.gfn = gfn;
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mpo.buffer = (unsigned long) buffer;
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return do_memory_op(xch, XENMEM_paging_op, &mpo, sizeof(mpo));
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}
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int xc_mem_paging_enable(xc_interface *xch, domid_t domain_id,
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uint32_t *port)
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{
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if ( !port )
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{
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errno = EINVAL;
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return -1;
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}
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return xc_vm_event_control(xch, domain_id,
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XEN_VM_EVENT_ENABLE,
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XEN_DOMCTL_VM_EVENT_OP_PAGING,
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port);
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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_vm_event_control(xch, domain_id,
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XEN_VM_EVENT_DISABLE,
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XEN_DOMCTL_VM_EVENT_OP_PAGING,
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NULL);
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}
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int xc_mem_paging_resume(xc_interface *xch, domid_t domain_id)
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{
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return xc_vm_event_control(xch, domain_id,
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XEN_VM_EVENT_RESUME,
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XEN_DOMCTL_VM_EVENT_OP_PAGING,
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NULL);
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}
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int xc_mem_paging_nominate(xc_interface *xch, domid_t domain_id, uint64_t gfn)
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{
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return xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_nominate,
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gfn, NULL);
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}
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int xc_mem_paging_evict(xc_interface *xch, domid_t domain_id, uint64_t gfn)
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{
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return xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_evict,
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gfn, NULL);
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}
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int xc_mem_paging_prep(xc_interface *xch, domid_t domain_id, uint64_t gfn)
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{
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return xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_prep,
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gfn, NULL);
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}
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int xc_mem_paging_load(xc_interface *xch, domid_t domain_id,
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uint64_t gfn, void *buffer)
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{
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int rc, old_errno;
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errno = EINVAL;
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if ( !buffer )
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return -1;
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if ( ((unsigned long) buffer) & (XC_PAGE_SIZE - 1) )
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return -1;
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if ( mlock(buffer, XC_PAGE_SIZE) )
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return -1;
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rc = xc_mem_paging_memop(xch, domain_id,
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XENMEM_paging_op_prep,
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gfn, buffer);
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old_errno = errno;
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munlock(buffer, XC_PAGE_SIZE);
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errno = old_errno;
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return rc;
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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-file-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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