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/*
* cpu_map.c: internal functions for handling CPU mapping configuration
*
* Copyright (C) 2009-2010 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; If not, see
* <http://www.gnu.org/licenses/>.
*
* Authors:
* Jiri Denemark <jdenemar@redhat.com>
*/
#include <config.h>
#include "memory.h"
#include "cpu.h"
#include "cpu_map.h"
#include "configmake.h"
#define VIR_FROM_THIS VIR_FROM_CPU
#define CPUMAPFILE PKGDATADIR "/cpu_map.xml"
static char *cpumap;
VIR_ENUM_IMPL(cpuMapElement, CPU_MAP_ELEMENT_LAST,
"vendor",
"feature",
"model")
static int load(xmlXPathContextPtr ctxt,
enum cpuMapElement element,
cpuMapLoadCallback callback,
void *data)
{
int ret = -1;
xmlNodePtr ctxt_node;
xmlNodePtr cur;
ctxt_node = ctxt->node;
cur = ctxt_node->children;
while (cur != NULL) {
if (cur->type == XML_ELEMENT_NODE &&
xmlStrEqual(cur->name,
BAD_CAST cpuMapElementTypeToString(element))) {
ctxt->node = cur;
if (callback(element, ctxt, data) < 0)
goto cleanup;
}
cur = cur->next;
}
ret = 0;
cleanup:
ctxt->node = ctxt_node;
return ret;
}
int cpuMapLoad(const char *arch,
cpuMapLoadCallback cb,
void *data)
{
xmlDocPtr xml = NULL;
xmlXPathContextPtr ctxt = NULL;
virBuffer buf = VIR_BUFFER_INITIALIZER;
char *xpath = NULL;
int ret = -1;
int element;
const char *mapfile = (cpumap ? cpumap : CPUMAPFILE);
if (arch == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("undefined hardware architecture"));
return -1;
}
if (cb == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
"%s", _("no callback provided"));
return -1;
}
if ((xml = xmlParseFile(mapfile)) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse CPU map file: %s"),
mapfile);
goto cleanup;
}
if ((ctxt = xmlXPathNewContext(xml)) == NULL)
goto no_memory;
virBufferAsprintf(&buf, "./arch[@name='%s']", arch);
if (virBufferError(&buf))
goto no_memory;
xpath = virBufferContentAndReset(&buf);
ctxt->node = xmlDocGetRootElement(xml);
if ((ctxt->node = virXPathNode(xpath, ctxt)) == NULL) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot find CPU map for %s architecture"), arch);
goto cleanup;
}
for (element = 0; element < CPU_MAP_ELEMENT_LAST; element++) {
if (load(ctxt, element, cb, data) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot parse CPU map for %s architecture"), arch);
goto cleanup;
}
}
ret = 0;
cleanup:
xmlXPathFreeContext(ctxt);
xmlFreeDoc(xml);
VIR_FREE(xpath);
return ret;
no_memory:
virReportOOMError();
goto cleanup;
}
int
cpuMapOverride(const char *path)
{
char *map;
if (!(map = strdup(path)))
return -1;
VIR_FREE(cpumap);
cpumap = map;
return 0;
}
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