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/******************************************************************************
* xc_foreign_memory.c
*
* Functions for mapping foreign domain's memory.
*
* 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;
* version 2.1 of the License.
*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "xc_private.h"
void *xc_map_foreign_pages(xc_interface *xch, uint32_t dom, int prot,
const xen_pfn_t *arr, int num)
{
void *res;
int i, *err;
if (num < 0) {
errno = -EINVAL;
return NULL;
}
err = malloc(num * sizeof(*err));
if (!err)
return NULL;
res = xc_map_foreign_bulk(xch, dom, prot, arr, err, num);
if (res) {
for (i = 0; i < num; i++) {
if (err[i]) {
errno = -err[i];
munmap(res, num * PAGE_SIZE);
res = NULL;
break;
}
}
}
free(err);
return res;
}
void *xc_map_foreign_range(xc_interface *xch, uint32_t dom,
int size, int prot, unsigned long mfn)
{
return xch->ops->u.privcmd.map_foreign_range(xch, xch->ops_handle,
dom, size, prot, mfn);
}
void *xc_map_foreign_ranges(xc_interface *xch, uint32_t dom,
size_t size, int prot, size_t chunksize,
privcmd_mmap_entry_t entries[], int nentries)
{
return xch->ops->u.privcmd.map_foreign_ranges(xch, xch->ops_handle,
dom, size, prot, chunksize, entries, nentries);
}
void *xc_map_foreign_batch(xc_interface *xch, uint32_t dom, int prot,
xen_pfn_t *arr, int num)
{
return xch->ops->u.privcmd.map_foreign_batch(xch, xch->ops_handle,
dom, prot, arr, num);
}
void *xc_map_foreign_bulk(xc_interface *xch, uint32_t dom, int prot,
const xen_pfn_t *arr, int *err, unsigned int num)
{
return xch->ops->u.privcmd.map_foreign_bulk(xch, xch->ops_handle,
dom, prot, arr, err, num);
}
/* stub for all not yet converted OSes */
void *xc_map_foreign_bulk_compat(xc_interface *xch, xc_osdep_handle h,
uint32_t dom, int prot,
const xen_pfn_t *arr, int *err, unsigned int num)
{
xen_pfn_t *pfn;
unsigned int i;
void *ret;
if ((int)num <= 0) {
errno = EINVAL;
return NULL;
}
pfn = malloc(num * sizeof(*pfn));
if (!pfn) {
errno = ENOMEM;
return NULL;
}
memcpy(pfn, arr, num * sizeof(*arr));
ret = xc_map_foreign_batch(xch, dom, prot, pfn, num);
if (ret) {
for (i = 0; i < num; ++i)
switch (pfn[i] ^ arr[i]) {
case 0:
err[i] = 0;
break;
default:
err[i] = -EINVAL;
break;
}
} else
memset(err, 0, num * sizeof(*err));
free(pfn);
return ret;
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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