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Olaf Hering
edf5b22022
Just code movement as a preparatory change before xg_sr_* will be moved. Signed-off-by: Olaf Hering <olaf@aepfle.de> Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
55 lines
2.0 KiB
C
55 lines
2.0 KiB
C
/*
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* Definitions and utilities for save / restore.
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include "xc_private.h"
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#include <xen/foreign/x86_32.h>
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#include <xen/foreign/x86_64.h>
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/*
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** We process save/restore/migrate in batches of pages; the below
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** determines how many pages we (at maximum) deal with in each batch.
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*/
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#define MAX_BATCH_SIZE 1024 /* up to 1024 pages (4MB) at a time */
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/* When pinning page tables at the end of restore, we also use batching. */
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#define MAX_PIN_BATCH 1024
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/*
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** Save/restore deal with the mfn_to_pfn (M2P) and pfn_to_mfn (P2M) tables.
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** The M2P simply holds the corresponding PFN, while the top bit of a P2M
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** entry tell us whether or not the the PFN is currently mapped.
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*/
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#define PFN_TO_KB(_pfn) ((_pfn) << (PAGE_SHIFT - 10))
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#define MEMCPY_FIELD(_d, _s, _f, _w) do { \
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if ((_w) == 8) \
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memcpy(&(_d)->x64._f, &(_s)->x64._f,sizeof((_d)->x64._f)); \
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else \
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memcpy(&(_d)->x32._f, &(_s)->x32._f,sizeof((_d)->x32._f)); \
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} while (0)
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#define MEMSET_ARRAY_FIELD(_p, _f, _v, _w) do { \
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if ((_w) == 8) \
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memset(&(_p)->x64._f[0], (_v), sizeof((_p)->x64._f)); \
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else \
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memset(&(_p)->x32._f[0], (_v), sizeof((_p)->x32._f)); \
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} while (0)
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