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/******************************************************************************
*
* tools/libxc/xc_mem_access.c
*
* Interface to low-level memory access mode functionality
*
* Copyright (c) 2011 Virtuata, Inc.
*
* 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"
#include <xen/memory.h>
int xc_set_mem_access(xc_interface *xch,
uint32_t domain_id,
xenmem_access_t access,
uint64_t first_pfn,
uint32_t nr)
{
xen_mem_access_op_t mao =
{
.op = XENMEM_access_op_set_access,
.domid = domain_id,
.access = access,
.pfn = first_pfn,
.nr = nr
};
return xc_memory_op(xch, XENMEM_access_op, &mao, sizeof(mao));
}
int xc_set_mem_access_multi(xc_interface *xch,
uint32_t domain_id,
uint8_t *access,
uint64_t *pages,
uint32_t nr)
{
DECLARE_HYPERCALL_BOUNCE(access, nr, XC_HYPERCALL_BUFFER_BOUNCE_IN);
DECLARE_HYPERCALL_BOUNCE(pages, nr * sizeof(uint64_t),
XC_HYPERCALL_BUFFER_BOUNCE_IN);
int rc;
xen_mem_access_op_t mao =
{
.op = XENMEM_access_op_set_access_multi,
.domid = domain_id,
.access = XENMEM_access_default + 1, /* Invalid value */
.pfn = ~0UL, /* Invalid GFN */
.nr = nr,
};
if ( xc_hypercall_bounce_pre(xch, pages) ||
xc_hypercall_bounce_pre(xch, access) )
{
PERROR("Could not bounce memory for XENMEM_access_op_set_access_multi");
return -1;
}
set_xen_guest_handle(mao.pfn_list, pages);
set_xen_guest_handle(mao.access_list, access);
rc = xc_memory_op(xch, XENMEM_access_op, &mao, sizeof(mao));
xc_hypercall_bounce_post(xch, access);
xc_hypercall_bounce_post(xch, pages);
return rc;
}
int xc_get_mem_access(xc_interface *xch,
uint32_t domain_id,
uint64_t pfn,
xenmem_access_t *access)
{
int rc;
xen_mem_access_op_t mao =
{
.op = XENMEM_access_op_get_access,
.domid = domain_id,
.pfn = pfn
};
rc = xc_memory_op(xch, XENMEM_access_op, &mao, sizeof(mao));
if ( rc == 0 )
*access = mao.access;
return rc;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* indent-tabs-mode: nil
* End:
*/
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