mirror of
https://github.com/xen-project/xen.git
synced 2026-10-29 02:30:03 +01:00
Juergen Gross
2b23bb664f
The core of a pv linux guest produced via "xl dump-core" is not usable as since kernel 4.14 only the linear p2m table is kept if Xen indicates it is supporting that. Unfortunately xc_core_arch_map_p2m() is still supporting the 3-level p2m tree only. Fix that by copying the functionality of map_p2m() from libxenguest to libxenctrl. Additionally the mapped p2m isn't of a fixed length now, so the interface to the mapping functions needs to be adapted. In order not to add even more parameters, expand struct domain_info_context and use a pointer to that as a parameter. This is a backport of upstream commitbd7a29c3d0. As the original patch includes a modification of a data structure passed via pointer to a library function, the related function in the library is renamed in order to be able to spot any external users of that function. Note that it is extremely unlikely any such users outside the Xen git tree are existing, so the risk to break any existing programs is very unlikely. In case such a user is existing, changing the name of xc_map_domain_meminfo() will at least avoid silent breakage. Fixes:dc6d609371("libxc: set flag for support of linear p2m list in domain builder") Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Ian Jackson <iwj@xenproject.org>
114 lines
3.0 KiB
C
114 lines
3.0 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, see <http://www.gnu.org/licenses/>.
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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 "xc_private.h"
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#include "xc_core.h"
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#include <xen-tools/libs.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, 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, 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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{
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return xc_core_arch_map_p2m_rw(xch, dinfo, info, live_shinfo, live_p2m, 0);
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}
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int
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xc_core_arch_map_p2m_writable(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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{
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return xc_core_arch_map_p2m_rw(xch, dinfo, info, live_shinfo, live_p2m, 1);
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}
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int
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xc_core_arch_get_scratch_gpfn(xc_interface *xch, uint32_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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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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