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Ian Campbell
fd81c3683a
Now that this file exists it is a better home for these than xc_misc.c Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Ian Jackson <ian.jackson.citrix.com>
133 lines
3.7 KiB
C
133 lines
3.7 KiB
C
/******************************************************************************
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* xc_foreign_memory.c
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*
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* Functions for mapping foreign domain's memory.
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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;
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* version 2.1 of the License.
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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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void *xc_map_foreign_pages(xc_interface *xch, uint32_t dom, int prot,
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const xen_pfn_t *arr, int num)
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{
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void *res;
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int i, *err;
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if (num < 0) {
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errno = -EINVAL;
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return NULL;
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}
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err = malloc(num * sizeof(*err));
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if (!err)
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return NULL;
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res = xc_map_foreign_bulk(xch, dom, prot, arr, err, num);
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if (res) {
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for (i = 0; i < num; i++) {
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if (err[i]) {
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errno = -err[i];
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munmap(res, num * PAGE_SIZE);
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res = NULL;
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break;
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}
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}
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}
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free(err);
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return res;
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}
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void *xc_map_foreign_range(xc_interface *xch, uint32_t dom,
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int size, int prot, unsigned long mfn)
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{
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return xch->ops->u.privcmd.map_foreign_range(xch, xch->ops_handle,
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dom, size, prot, mfn);
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}
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void *xc_map_foreign_ranges(xc_interface *xch, uint32_t dom,
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size_t size, int prot, size_t chunksize,
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privcmd_mmap_entry_t entries[], int nentries)
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{
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return xch->ops->u.privcmd.map_foreign_ranges(xch, xch->ops_handle,
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dom, size, prot, chunksize, entries, nentries);
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}
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void *xc_map_foreign_batch(xc_interface *xch, uint32_t dom, int prot,
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xen_pfn_t *arr, int num)
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{
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return xch->ops->u.privcmd.map_foreign_batch(xch, xch->ops_handle,
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dom, prot, arr, num);
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}
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void *xc_map_foreign_bulk(xc_interface *xch, uint32_t dom, int prot,
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const xen_pfn_t *arr, int *err, unsigned int num)
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{
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return xch->ops->u.privcmd.map_foreign_bulk(xch, xch->ops_handle,
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dom, prot, arr, err, num);
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}
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/* stub for all not yet converted OSes */
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void *xc_map_foreign_bulk_compat(xc_interface *xch, xc_osdep_handle h,
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uint32_t dom, int prot,
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const xen_pfn_t *arr, int *err, unsigned int num)
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{
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xen_pfn_t *pfn;
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unsigned int i;
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void *ret;
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if ((int)num <= 0) {
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errno = EINVAL;
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return NULL;
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}
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pfn = malloc(num * sizeof(*pfn));
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if (!pfn) {
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errno = ENOMEM;
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return NULL;
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}
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memcpy(pfn, arr, num * sizeof(*arr));
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ret = xc_map_foreign_batch(xch, dom, prot, pfn, num);
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if (ret) {
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for (i = 0; i < num; ++i)
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switch (pfn[i] ^ arr[i]) {
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case 0:
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err[i] = 0;
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break;
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default:
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err[i] = -EINVAL;
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break;
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}
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} else
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memset(err, 0, num * sizeof(*err));
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free(pfn);
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return ret;
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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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* tab-width: 4
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* indent-tabs-mode: nil
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* End:
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*/
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