mirror of
https://github.com/xen-project/xen.git
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Konrad Rzeszutek Wilk
71cba2a07b
The commita8f8a590e0"libxc: Check xc_domain_maximum_gpfn for negative return values" introduced an regression in tools outside libxc (migrate v2) which wanted the unfiltered GPFN value. Said commit added a wrapper which added +1 if there were no errors. To make it work pre-commita8f8a59we add an xc_domain_nr_gpfns which will add +1 if there are no errors (and change all in-tree callers to use it). The xc_domain_maximum_gpfn will return the unfiltered GPFN value. Suggested-by: Ian Campbell <ian.campbell@citrix.com> Reported-by: Andrew Cooper <andrew.cooper3@citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com> Acked-by: Ian Campbell <ian.campbell@citrix.com>
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/*
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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; either
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* version 2.1 of the License, or (at your option) any later version.
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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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* Copyright (c) 2011 Citrix Systems
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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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int
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xc_core_arch_gpfn_may_present(struct xc_core_arch_context *arch_ctxt,
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unsigned long pfn)
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{
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/* TODO: memory from DT */
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if (pfn >= 0x80000 && pfn < 0x88000)
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return 1;
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return 0;
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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 1;
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}
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int
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xc_core_arch_memory_map_get(xc_interface *xch, struct xc_core_arch_context *unused,
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xc_dominfo_t *info, shared_info_any_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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xen_pfn_t p2m_size = 0;
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xc_core_memory_map_t *map;
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if ( xc_domain_nr_gpfns(xch, info->domid, &p2m_size) < 0 )
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return -1;
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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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static int
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xc_core_arch_map_p2m_rw(xc_interface *xch, struct domain_info_context *dinfo, xc_dominfo_t *info,
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shared_info_any_t *live_shinfo, xen_pfn_t **live_p2m,
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unsigned long *pfnp, int rw)
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{
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errno = ENOSYS;
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return -1;
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}
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int
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xc_core_arch_map_p2m(xc_interface *xch, unsigned int guest_width, xc_dominfo_t *info,
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shared_info_any_t *live_shinfo, xen_pfn_t **live_p2m,
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unsigned long *pfnp)
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{
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struct domain_info_context _dinfo = { .guest_width = guest_width };
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struct domain_info_context *dinfo = &_dinfo;
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return xc_core_arch_map_p2m_rw(xch, dinfo, info,
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live_shinfo, live_p2m, pfnp, 0);
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}
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int
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xc_core_arch_map_p2m_writable(xc_interface *xch, unsigned int guest_width, xc_dominfo_t *info,
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shared_info_any_t *live_shinfo, xen_pfn_t **live_p2m,
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unsigned long *pfnp)
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{
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struct domain_info_context _dinfo = { .guest_width = guest_width };
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struct domain_info_context *dinfo = &_dinfo;
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return xc_core_arch_map_p2m_rw(xch, dinfo, info,
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live_shinfo, live_p2m, pfnp, 1);
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}
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int
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xc_core_arch_get_scratch_gpfn(xc_interface *xch, domid_t domid,
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xen_pfn_t *gpfn)
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{
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/*
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* The Grant Table region space is not used until the guest is
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* booting. Use the first page for the scratch pfn.
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*/
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XC_BUILD_BUG_ON(GUEST_GNTTAB_SIZE < XC_PAGE_SIZE);
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*gpfn = GUEST_GNTTAB_BASE >> XC_PAGE_SHIFT;
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return 0;
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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-file-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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