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/*
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Copyright (c) 2007 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
*
*/
#include "xg_private.h"
#include "xc_core.h"
#include <xen/hvm/e820.h>
#define GET_FIELD(_p, _f) ((dinfo->guest_width==8) ? ((_p)->x64._f) : ((_p)->x32._f))
#ifndef MAX
#define MAX(_a, _b) ((_a) >= (_b) ? (_a) : (_b))
#endif
int
xc_core_arch_gpfn_may_present(struct xc_core_arch_context *arch_ctxt,
unsigned long pfn)
{
if ((pfn >= 0xa0 && pfn < 0xc0) /* VGA hole */
|| (pfn >= (HVM_BELOW_4G_MMIO_START >> PAGE_SHIFT)
&& pfn < (1ULL<<32) >> PAGE_SHIFT)) /* MMIO */
return 0;
return 1;
}
static int nr_gpfns(xc_interface *xch, domid_t domid)
{
return xc_domain_maximum_gpfn(xch, domid) + 1;
}
int
xc_core_arch_auto_translated_physmap(const xc_dominfo_t *info)
{
return info->hvm;
}
int
xc_core_arch_memory_map_get(xc_interface *xch, struct xc_core_arch_context *unused,
xc_dominfo_t *info, shared_info_any_t *live_shinfo,
xc_core_memory_map_t **mapp,
unsigned int *nr_entries)
{
unsigned long p2m_size = nr_gpfns(xch, info->domid);
xc_core_memory_map_t *map;
map = malloc(sizeof(*map));
if ( map == NULL )
{
PERROR("Could not allocate memory");
return -1;
}
map->addr = 0;
map->size = ((uint64_t)p2m_size) << PAGE_SHIFT;
*mapp = map;
*nr_entries = 1;
return 0;
}
static int
xc_core_arch_map_p2m_rw(xc_interface *xch, struct domain_info_context *dinfo, xc_dominfo_t *info,
shared_info_any_t *live_shinfo, xen_pfn_t **live_p2m,
unsigned long *pfnp, int rw)
{
/* Double and single indirect references to the live P2M table */
xen_pfn_t *live_p2m_frame_list_list = NULL;
xen_pfn_t *live_p2m_frame_list = NULL;
/* Copies of the above. */
xen_pfn_t *p2m_frame_list_list = NULL;
xen_pfn_t *p2m_frame_list = NULL;
uint32_t dom = info->domid;
int ret = -1;
int err;
int i;
dinfo->p2m_size = nr_gpfns(xch, info->domid);
if ( dinfo->p2m_size < info->nr_pages )
{
ERROR("p2m_size < nr_pages -1 (%lx < %lx", dinfo->p2m_size, info->nr_pages - 1);
goto out;
}
live_p2m_frame_list_list =
xc_map_foreign_range(xch, dom, PAGE_SIZE, PROT_READ,
GET_FIELD(live_shinfo, arch.pfn_to_mfn_frame_list_list));
if ( !live_p2m_frame_list_list )
{
PERROR("Couldn't map p2m_frame_list_list (errno %d)", errno);
goto out;
}
/* Get a local copy of the live_P2M_frame_list_list */
if ( !(p2m_frame_list_list = malloc(PAGE_SIZE)) )
{
ERROR("Couldn't allocate p2m_frame_list_list array");
goto out;
}
memcpy(p2m_frame_list_list, live_p2m_frame_list_list, PAGE_SIZE);
/* Canonicalize guest's unsigned long vs ours */
if ( dinfo->guest_width > sizeof(unsigned long) )
for ( i = 0; i < PAGE_SIZE/sizeof(unsigned long); i++ )
if ( i < PAGE_SIZE/dinfo->guest_width )
p2m_frame_list_list[i] = ((uint64_t *)p2m_frame_list_list)[i];
else
p2m_frame_list_list[i] = 0;
else if ( dinfo->guest_width < sizeof(unsigned long) )
for ( i = PAGE_SIZE/sizeof(unsigned long) - 1; i >= 0; i-- )
p2m_frame_list_list[i] = ((uint32_t *)p2m_frame_list_list)[i];
live_p2m_frame_list =
xc_map_foreign_pages(xch, dom, PROT_READ,
p2m_frame_list_list,
P2M_FLL_ENTRIES);
if ( !live_p2m_frame_list )
{
PERROR("Couldn't map p2m_frame_list");
goto out;
}
/* Get a local copy of the live_P2M_frame_list */
if ( !(p2m_frame_list = malloc(P2M_TOOLS_FL_SIZE)) )
{
ERROR("Couldn't allocate p2m_frame_list array");
goto out;
}
memset(p2m_frame_list, 0, P2M_TOOLS_FL_SIZE);
memcpy(p2m_frame_list, live_p2m_frame_list, P2M_GUEST_FL_SIZE);
/* Canonicalize guest's unsigned long vs ours */
if ( dinfo->guest_width > sizeof(unsigned long) )
for ( i = 0; i < P2M_FL_ENTRIES; i++ )
p2m_frame_list[i] = ((uint64_t *)p2m_frame_list)[i];
else if ( dinfo->guest_width < sizeof(unsigned long) )
for ( i = P2M_FL_ENTRIES - 1; i >= 0; i-- )
p2m_frame_list[i] = ((uint32_t *)p2m_frame_list)[i];
*live_p2m = xc_map_foreign_pages(xch, dom,
rw ? (PROT_READ | PROT_WRITE) : PROT_READ,
p2m_frame_list,
P2M_FL_ENTRIES);
if ( !*live_p2m )
{
PERROR("Couldn't map p2m table");
goto out;
}
*pfnp = dinfo->p2m_size;
ret = 0;
out:
err = errno;
if ( live_p2m_frame_list_list )
munmap(live_p2m_frame_list_list, PAGE_SIZE);
if ( live_p2m_frame_list )
munmap(live_p2m_frame_list, P2M_FLL_ENTRIES * PAGE_SIZE);
if ( p2m_frame_list_list )
free(p2m_frame_list_list);
if ( p2m_frame_list )
free(p2m_frame_list);
errno = err;
return ret;
}
int
xc_core_arch_map_p2m(xc_interface *xch, unsigned int guest_width, xc_dominfo_t *info,
shared_info_any_t *live_shinfo, xen_pfn_t **live_p2m,
unsigned long *pfnp)
{
struct domain_info_context _dinfo = { .guest_width = guest_width };
struct domain_info_context *dinfo = &_dinfo;
return xc_core_arch_map_p2m_rw(xch, dinfo, info,
live_shinfo, live_p2m, pfnp, 0);
}
int
xc_core_arch_map_p2m_writable(xc_interface *xch, unsigned int guest_width, xc_dominfo_t *info,
shared_info_any_t *live_shinfo, xen_pfn_t **live_p2m,
unsigned long *pfnp)
{
struct domain_info_context _dinfo = { .guest_width = guest_width };
struct domain_info_context *dinfo = &_dinfo;
return xc_core_arch_map_p2m_rw(xch, dinfo, info,
live_shinfo, live_p2m, pfnp, 1);
}
/*
* Local variables:
* mode: C
* c-file-style: "BSD"
* c-basic-offset: 4
* tab-width: 4
* indent-tabs-mode: nil
* End:
*/
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