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4b7c45ef61
The architecture specific loaders are now called with a list of all elements of a given type (rather than a single element at a time). This avoids the need to reallocate the arrays in CPU maps for each element. Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
140 lines
3.5 KiB
C
140 lines
3.5 KiB
C
/*
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* cpu_map.c: internal functions for handling CPU mapping configuration
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*
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* Copyright (C) 2009-2010 Red Hat, Inc.
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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; 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
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* <http://www.gnu.org/licenses/>.
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*
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* Authors:
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* Jiri Denemark <jdenemar@redhat.com>
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*/
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#include <config.h>
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#include "viralloc.h"
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#include "virfile.h"
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#include "cpu.h"
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#include "cpu_map.h"
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#include "configmake.h"
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#include "virstring.h"
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#include "virlog.h"
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#define VIR_FROM_THIS VIR_FROM_CPU
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VIR_LOG_INIT("cpu.cpu_map");
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VIR_ENUM_IMPL(cpuMapElement, CPU_MAP_ELEMENT_LAST,
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"vendor",
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"feature",
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"model")
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static int load(xmlXPathContextPtr ctxt,
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cpuMapElement element,
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cpuMapLoadCallback callback,
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void *data)
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{
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int ret = -1;
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xmlNodePtr ctxt_node;
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xmlNodePtr *nodes = NULL;
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int n;
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ctxt_node = ctxt->node;
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n = virXPathNodeSet(cpuMapElementTypeToString(element), ctxt, &nodes);
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if (n < 0)
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goto cleanup;
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if (n > 0 &&
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callback(element, ctxt, nodes, n, data) < 0)
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goto cleanup;
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ret = 0;
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cleanup:
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ctxt->node = ctxt_node;
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VIR_FREE(nodes);
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return ret;
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}
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int cpuMapLoad(const char *arch,
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cpuMapLoadCallback cb,
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void *data)
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{
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xmlDocPtr xml = NULL;
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xmlXPathContextPtr ctxt = NULL;
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virBuffer buf = VIR_BUFFER_INITIALIZER;
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char *xpath = NULL;
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int ret = -1;
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int element;
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char *mapfile;
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if (!(mapfile = virFileFindResource("cpu_map.xml",
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abs_topsrcdir "/src/cpu",
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PKGDATADIR)))
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return -1;
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VIR_DEBUG("Loading CPU map from %s", mapfile);
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if (arch == NULL) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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"%s", _("undefined hardware architecture"));
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goto cleanup;
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}
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if (cb == NULL) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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"%s", _("no callback provided"));
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goto cleanup;
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}
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if (!(xml = virXMLParseFileCtxt(mapfile, &ctxt)))
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goto cleanup;
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virBufferAsprintf(&buf, "./arch[@name='%s']", arch);
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if (virBufferCheckError(&buf) < 0)
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goto cleanup;
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xpath = virBufferContentAndReset(&buf);
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ctxt->node = xmlDocGetRootElement(xml);
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if ((ctxt->node = virXPathNode(xpath, ctxt)) == NULL) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("cannot find CPU map for %s architecture"), arch);
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goto cleanup;
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}
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for (element = 0; element < CPU_MAP_ELEMENT_LAST; element++) {
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if (load(ctxt, element, cb, data) < 0) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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_("cannot parse CPU map for %s architecture"), arch);
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goto cleanup;
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}
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}
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ret = 0;
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cleanup:
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xmlXPathFreeContext(ctxt);
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xmlFreeDoc(xml);
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VIR_FREE(xpath);
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VIR_FREE(mapfile);
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return ret;
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}
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