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Viewing changes to tools/libxc/xc_memshr.c

  • Committer: Bazaar Package Importer
  • Author(s): Bastian Blank
  • Date: 2010-05-06 15:47:38 UTC
  • mto: (1.3.1) (15.1.1 sid) (4.1.1 experimental)
  • mto: This revision was merged to the branch mainline in revision 3.
  • Revision ID: james.westby@ubuntu.com-20100506154738-agoz0rlafrh1fnq7
Tags: upstream-4.0.0
Import upstream version 4.0.0

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tools/libxc/xc_memshr.c
 
1
/******************************************************************************
 
2
 *
 
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 * xc_memshr.c
 
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 *
 
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 * Interface to low-level memory sharing functionality.
 
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 *
 
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 * Copyright (c) 2009 Citrix Systems, Inc. (Grzegorz Milos)
 
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 *
 
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 * This program is free software; you can redistribute it and/or modify
 
10
 * it under the terms of the GNU General Public License as published by
 
11
 * the Free Software Foundation; either version 2 of the License, or
 
12
 * (at your option) any later version.
 
13
 *
 
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 * This program is distributed in the hope that it will be useful,
 
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 
16
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
17
 * GNU General Public License for more details.
 
18
 *
 
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 * You should have received a copy of the GNU General Public License
 
20
 * along with this program; if not, write to the Free Software
 
21
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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 */
 
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#include "xc_private.h"
 
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#include <xen/memory.h>
 
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#include <xen/grant_table.h>
 
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int xc_memshr_control(int xc_handle,
 
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                      uint32_t domid,
 
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                      int enable)
 
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{
 
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    DECLARE_DOMCTL;
 
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    struct xen_domctl_mem_sharing_op *op;
 
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    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
 
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    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
 
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    domctl.domain = (domid_t)domid;
 
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    op = &(domctl.u.mem_sharing_op);
 
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    op->op = XEN_DOMCTL_MEM_SHARING_OP_CONTROL;
 
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    op->u.enable = enable;
 
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    return do_domctl(xc_handle, &domctl);
 
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}
 
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int xc_memshr_nominate_gfn(int xc_handle,
 
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                           uint32_t domid,
 
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                           unsigned long gfn,
 
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                           uint64_t *handle)
 
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{
 
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    DECLARE_DOMCTL;
 
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    struct xen_domctl_mem_sharing_op *op;
 
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    int ret;
 
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    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
 
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    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
 
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    domctl.domain = (domid_t)domid;
 
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    op = &(domctl.u.mem_sharing_op);
 
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    op->op = XEN_DOMCTL_MEM_SHARING_OP_NOMINATE_GFN;
 
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    op->u.nominate.u.gfn = gfn;
 
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    ret = do_domctl(xc_handle, &domctl);
 
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    if(!ret) *handle = op->u.nominate.handle; 
 
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    return ret;
 
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}
 
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int xc_memshr_nominate_gref(int xc_handle,
 
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                            uint32_t domid,
 
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                            grant_ref_t gref,
 
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                            uint64_t *handle)
 
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{
 
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    DECLARE_DOMCTL;
 
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    struct xen_domctl_mem_sharing_op *op;
 
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    int ret;
 
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    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
 
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    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
 
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    domctl.domain = (domid_t)domid;
 
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    op = &(domctl.u.mem_sharing_op);
 
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    op->op = XEN_DOMCTL_MEM_SHARING_OP_NOMINATE_GREF;
 
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    op->u.nominate.u.grant_ref = gref;
 
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    ret = do_domctl(xc_handle, &domctl);
 
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    if(!ret) *handle = op->u.nominate.handle; 
 
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    return ret;
 
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}
 
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int xc_memshr_share(int xc_handle,
 
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                    uint64_t source_handle,
 
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                    uint64_t client_handle)
 
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{
 
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    DECLARE_DOMCTL;
 
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    struct xen_domctl_mem_sharing_op *op;
 
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    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
 
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    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
 
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    domctl.domain = 0;
 
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    op = &(domctl.u.mem_sharing_op);
 
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    op->op = XEN_DOMCTL_MEM_SHARING_OP_SHARE;
 
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    op->u.share.source_handle = source_handle;
 
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    op->u.share.client_handle = client_handle;
 
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    return do_domctl(xc_handle, &domctl);
 
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}
 
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int xc_memshr_domain_resume(int xc_handle,
 
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                            uint32_t domid)
 
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{
 
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    DECLARE_DOMCTL;
 
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    struct xen_domctl_mem_sharing_op *op;
 
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    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
 
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    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
 
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    domctl.domain = (domid_t)domid;
 
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    op = &(domctl.u.mem_sharing_op);
 
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    op->op = XEN_DOMCTL_MEM_SHARING_OP_RESUME;
 
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    return do_domctl(xc_handle, &domctl);
 
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}
 
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int xc_memshr_debug_gfn(int xc_handle,
 
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                        uint32_t domid,
 
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                        unsigned long gfn)
 
125
{
 
126
    DECLARE_DOMCTL;
 
127
    struct xen_domctl_mem_sharing_op *op;
 
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129
    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
 
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    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
 
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    domctl.domain = (domid_t)domid;
 
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    op = &(domctl.u.mem_sharing_op);
 
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    op->op = XEN_DOMCTL_MEM_SHARING_OP_DEBUG_GFN;
 
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    op->u.debug.u.gfn = gfn;
 
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    return do_domctl(xc_handle, &domctl);
 
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}
 
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int xc_memshr_debug_mfn(int xc_handle,
 
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                        uint32_t domid,
 
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                        unsigned long mfn)
 
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{
 
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    DECLARE_DOMCTL;
 
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    struct xen_domctl_mem_sharing_op *op;
 
145
 
 
146
    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
 
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    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
 
148
    domctl.domain = (domid_t)domid;
 
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    op = &(domctl.u.mem_sharing_op);
 
150
    op->op = XEN_DOMCTL_MEM_SHARING_OP_DEBUG_MFN;
 
151
    op->u.debug.u.mfn = mfn;
 
152
 
 
153
    return do_domctl(xc_handle, &domctl);
 
154
}
 
155
 
 
156
int xc_memshr_debug_gref(int xc_handle,
 
157
                         uint32_t domid,
 
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                         grant_ref_t gref)
 
159
{
 
160
    DECLARE_DOMCTL;
 
161
    struct xen_domctl_mem_sharing_op *op;
 
162
 
 
163
    domctl.cmd = XEN_DOMCTL_mem_sharing_op;
 
164
    domctl.interface_version = XEN_DOMCTL_INTERFACE_VERSION;
 
165
    domctl.domain = (domid_t)domid;
 
166
    op = &(domctl.u.mem_sharing_op);
 
167
    op->op = XEN_DOMCTL_MEM_SHARING_OP_DEBUG_GREF;
 
168
    op->u.debug.u.gref = gref;
 
169
 
 
170
    return do_domctl(xc_handle, &domctl);
 
171
}
 
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