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Ian Campbell
443701ef0c
As recommended in http://www.gnu.org/licenses/gpl-howto.en.html. This is the result of: $ git grep -El Mass\|Temple\|Franklin | xargs ./fsf.pl Where fsf.pl is: #!/usr/bin/perl -w -pi.bak -0777 my $repl = 'If not, see <http://www.gnu.org/licenses/>.'; my $br = qr/(?:\s*\n\s*(?:[\*\#]|\/\/|\.\\" )?\s*|\s+)/; my $inwt = qr/[Ii]f${br}not,${br}write${br}(?:to${br})?the${br}Free${br}Software${br}Foundation,(?:${br}Inc\.,)?/; my $mass = qr/675${br}Mass${br}Ave,?${br}Cambridge,?${br}MA${br}02139,?${br}USA,?\.?/; my $franklin = qr/51${br}Franklin${br}St(?:reet)?(?:,${br}| - )Fifth${br}Floor,?${br}Boston,?${br}MA,?${br}02110-1301,?${br}USA,?\.?/; my $temple = qr/59${br}Temple${br}Place(?:,${br}| - )Suite${br}330,?${br}Boston,?${br}MA,?${br}021110?-1307,?${br}USA,?\.?/; s|$inwt$br$mass|$repl|m; s|$inwt$br$franklin|$repl|m; s|$inwt$br$temple|$repl|m; The only remaining mentions of these addresses are in COPYING files which I haven't touched. Some of the changed files are imports from elsewhere, however filtering them out is tricky, I think it is tolerable to have these files be modified here and then perhaps reverted on the next sync, since it's only 1-2 lines and obvious what is going on. Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
148 lines
5.5 KiB
C
148 lines
5.5 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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** Determine various platform information required for save/restore, in
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** particular:
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**
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** - the maximum MFN on this machine, used to compute the size of
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** the M2P table;
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**
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** - the starting virtual address of the the hypervisor; we use this
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** to determine which parts of guest address space(s) do and don't
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** require canonicalization during save/restore; and
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**
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** - the number of page-table levels for save/ restore. This should
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** be a property of the domain, but for the moment we just read it
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** from the hypervisor.
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**
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** - The width of a guest word (unsigned long), in bytes.
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**
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** Returns 1 on success, 0 on failure.
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*/
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static inline int get_platform_info(xc_interface *xch, uint32_t dom,
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/* OUT */ unsigned long *max_mfn,
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/* OUT */ unsigned long *hvirt_start,
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/* OUT */ unsigned int *pt_levels,
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/* OUT */ unsigned int *guest_width)
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{
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xen_capabilities_info_t xen_caps = "";
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xen_platform_parameters_t xen_params;
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if (xc_version(xch, XENVER_platform_parameters, &xen_params) != 0)
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return 0;
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if (xc_version(xch, XENVER_capabilities, &xen_caps) != 0)
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return 0;
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if (xc_maximum_ram_page(xch, max_mfn))
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return 0;
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*hvirt_start = xen_params.virt_start;
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if ( xc_domain_get_guest_width(xch, dom, guest_width) != 0)
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return 0;
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/* 64-bit tools will see the 64-bit hvirt_start, but 32-bit guests
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* will be using the compat one. */
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if ( *guest_width < sizeof (unsigned long) )
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/* XXX need to fix up a way of extracting this value from Xen if
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* XXX it becomes variable for domU */
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*hvirt_start = 0xf5800000;
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if (strstr(xen_caps, "xen-3.0-x86_64"))
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/* Depends on whether it's a compat 32-on-64 guest */
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*pt_levels = ( (*guest_width == 8) ? 4 : 3 );
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else if (strstr(xen_caps, "xen-3.0-x86_32p"))
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*pt_levels = 3;
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else
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return 0;
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return 1;
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}
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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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/*
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** The M2P is made up of some number of 'chunks' of at least 2MB in size.
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** The below definitions and utility function(s) deal with mapping the M2P
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** regarldess of the underlying machine memory size or architecture.
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*/
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#define M2P_SHIFT L2_PAGETABLE_SHIFT_PAE
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#define M2P_CHUNK_SIZE (1 << M2P_SHIFT)
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#define M2P_SIZE(_m) ROUNDUP(((_m) * sizeof(xen_pfn_t)), M2P_SHIFT)
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#define M2P_CHUNKS(_m) (M2P_SIZE((_m)) >> M2P_SHIFT)
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/* Returns TRUE if the PFN is currently mapped */
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#define is_mapped(pfn_type) (!((pfn_type) & 0x80000000UL))
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#define GET_FIELD(_p, _f, _w) (((_w) == 8) ? ((_p)->x64._f) : ((_p)->x32._f))
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#define SET_FIELD(_p, _f, _v, _w) do { \
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if ((_w) == 8) \
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(_p)->x64._f = (_v); \
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else \
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(_p)->x32._f = (_v); \
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} while (0)
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#define UNFOLD_CR3(_c) \
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((uint64_t)((dinfo->guest_width == 8) \
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? ((_c) >> 12) \
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: (((uint32_t)(_c) >> 12) | ((uint32_t)(_c) << 20))))
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#define FOLD_CR3(_c) \
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((uint64_t)((dinfo->guest_width == 8) \
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? ((uint64_t)(_c)) << 12 \
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: (((uint32_t)(_c) << 12) | ((uint32_t)(_c) >> 20))))
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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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