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https://github.com/xen-project/xen.git
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138 lines
3.7 KiB
C
138 lines
3.7 KiB
C
/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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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
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* Copyright (c) 2007 Isaku Yamahata <yamahata at valinux co jp>
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* VA Linux Systems Japan K.K.
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*
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*/
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#include "xg_private.h"
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#include "xc_core.h"
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/* Don't yet support cross-address-size core dump */
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#define guest_width (sizeof (unsigned long))
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static int nr_gpfns(int xc_handle, domid_t domid)
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{
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return xc_memory_op(xc_handle, XENMEM_maximum_gpfn, &domid) + 1;
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}
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int
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xc_core_arch_auto_translated_physmap(const xc_dominfo_t *info)
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{
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return info->hvm;
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}
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int
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xc_core_arch_memory_map_get(int xc_handle, struct xc_core_arch_context *unused,
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xc_dominfo_t *info, shared_info_t *live_shinfo,
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xc_core_memory_map_t **mapp,
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unsigned int *nr_entries)
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{
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unsigned long p2m_size = nr_gpfns(xc_handle, info->domid);
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xc_core_memory_map_t *map;
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map = malloc(sizeof(*map));
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if ( map == NULL )
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{
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PERROR("Could not allocate memory");
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return -1;
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}
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map->addr = 0;
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map->size = ((uint64_t)p2m_size) << PAGE_SHIFT;
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*mapp = map;
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*nr_entries = 1;
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return 0;
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}
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int
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xc_core_arch_map_p2m(int xc_handle, xc_dominfo_t *info,
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shared_info_t *live_shinfo, xen_pfn_t **live_p2m,
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unsigned long *pfnp)
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{
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/* Double and single indirect references to the live P2M table */
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xen_pfn_t *live_p2m_frame_list_list = NULL;
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xen_pfn_t *live_p2m_frame_list = NULL;
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uint32_t dom = info->domid;
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unsigned long p2m_size = nr_gpfns(xc_handle, info->domid);
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int ret = -1;
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int err;
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if ( p2m_size < info->nr_pages )
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{
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ERROR("p2m_size < nr_pages -1 (%lx < %lx", p2m_size, info->nr_pages - 1);
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goto out;
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}
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live_p2m_frame_list_list =
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xc_map_foreign_range(xc_handle, dom, PAGE_SIZE, PROT_READ,
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live_shinfo->arch.pfn_to_mfn_frame_list_list);
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if ( !live_p2m_frame_list_list )
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{
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PERROR("Couldn't map p2m_frame_list_list (errno %d)", errno);
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goto out;
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}
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live_p2m_frame_list =
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xc_map_foreign_batch(xc_handle, dom, PROT_READ,
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live_p2m_frame_list_list,
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P2M_FLL_ENTRIES);
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if ( !live_p2m_frame_list )
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{
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PERROR("Couldn't map p2m_frame_list");
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goto out;
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}
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*live_p2m = xc_map_foreign_batch(xc_handle, dom, PROT_READ,
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live_p2m_frame_list,
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P2M_FL_ENTRIES);
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if ( !*live_p2m )
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{
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PERROR("Couldn't map p2m table");
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goto out;
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}
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*pfnp = p2m_size;
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ret = 0;
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out:
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err = errno;
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if ( live_p2m_frame_list_list )
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munmap(live_p2m_frame_list_list, PAGE_SIZE);
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if ( live_p2m_frame_list )
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munmap(live_p2m_frame_list, P2M_FLL_ENTRIES * PAGE_SIZE);
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errno = err;
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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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