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130 lines
3.3 KiB
C
130 lines
3.3 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 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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 "memory.h"
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#include "cpu.h"
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#include "cpu_map.h"
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#define VIR_FROM_THIS VIR_FROM_CPU
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#define CPUMAPFILE PKGDATADIR "/cpu_map.xml"
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static int load(xmlXPathContextPtr ctxt,
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const char *node,
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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 cur;
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ctxt_node = ctxt->node;
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cur = ctxt_node->children;
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while (cur != NULL) {
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if (cur->type == XML_ELEMENT_NODE &&
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xmlStrEqual(cur->name, BAD_CAST node)) {
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ctxt->node = cur;
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if (callback(ctxt, data) < 0)
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goto cleanup;
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}
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cur = cur->next;
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}
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ret = 0;
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cleanup:
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ctxt->node = ctxt_node;
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return ret;
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}
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int cpuMapLoad(const char *arch,
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cpuMapLoadCallback feature_cb,
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void *model_data,
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cpuMapLoadCallback model_cb,
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void *feature_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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if (arch == NULL) {
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virCPUReportError(NULL, VIR_ERR_INTERNAL_ERROR,
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"%s", _("undefined hardware architecture"));
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return -1;
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}
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if ((xml = xmlParseFile(CPUMAPFILE)) == NULL) {
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virCPUReportError(NULL, VIR_ERR_INTERNAL_ERROR,
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_("cannot parse CPU map file: %s"),
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CPUMAPFILE);
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goto cleanup;
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}
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if ((ctxt = xmlXPathNewContext(xml)) == NULL)
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goto no_memory;
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virBufferVSprintf(&buf, "./arch[@name='%s']", arch);
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if (virBufferError(&buf))
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goto no_memory;
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xpath = virBufferContentAndReset(&buf);
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ctxt->node = xmlDocGetRootElement(xml);
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if ((ctxt->node = virXPathNode(NULL, xpath, ctxt)) == NULL) {
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virCPUReportError(NULL, 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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if ((feature_cb && load(ctxt, "feature", feature_cb, feature_data) < 0) ||
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(model_cb && load(ctxt, "model", model_cb, model_data) < 0)) {
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virCPUReportError(NULL, 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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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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return ret;
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no_memory:
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virReportOOMError();
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goto cleanup;
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}
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