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conf: Report TSC frequency in host CPU capabilities

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This patch adds a new

    <counter name='tsc' frequency='N' scaling='on|off'/>

element into the host CPU capabilities XML.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Jiri Denemark 2019-05-30 21:47:49 +02:00
parent f0f6faba63
commit c277b9ad5c
2 changed files with 50 additions and 0 deletions
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48
src/conf/cpu_conf.c
View File

@ -112,6 +112,7 @@ virCPUDefFree(virCPUDefPtr def)
virCPUDefFreeModel(def);
VIR_FREE(def->cache);
VIR_FREE(def->tsc);
VIR_FREE(def);
}
@ -233,6 +234,13 @@ virCPUDefCopyWithoutModel(const virCPUDef *cpu)
*copy->cache = *cpu->cache;
}
if (cpu->tsc) {
if (VIR_ALLOC(copy->tsc) < 0)
goto error;
*copy->tsc = *cpu->tsc;
}
return copy;
error:
@ -286,6 +294,8 @@ virCPUDefParseXML(xmlXPathContextPtr ctxt,
char *cpuMode;
char *fallback = NULL;
char *vendor_id = NULL;
char *tscScaling = NULL;
virHostCPUTscInfoPtr tsc = NULL;
int ret = -1;
*cpu = NULL;
@ -402,6 +412,32 @@ virCPUDefParseXML(xmlXPathContextPtr ctxt,
_("invalid microcode version"));
goto cleanup;
}
if (virXPathBoolean("boolean(./counter[@name='tsc'])", ctxt) > 0) {
if (VIR_ALLOC(tsc) < 0)
goto cleanup;
if (virXPathULongLong("./counter[@name='tsc']/@frequency", ctxt,
&tsc->frequency) < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Invalid TSC frequency"));
goto cleanup;
}
tscScaling = virXPathString("string(./counter[@name='tsc']/@scaling)",
ctxt);
if (tscScaling) {
int scaling = virTristateBoolTypeFromString(tscScaling);
if (scaling < 0) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Invalid TSC scaling attribute"));
goto cleanup;
}
tsc->scaling = scaling;
}
VIR_STEAL_PTR(def->tsc, tsc);
}
}
if (!(def->model = virXPathString("string(./model[1])", ctxt)) &&
@ -587,6 +623,8 @@ virCPUDefParseXML(xmlXPathContextPtr ctxt,
VIR_FREE(fallback);
VIR_FREE(vendor_id);
VIR_FREE(nodes);
VIR_FREE(tscScaling);
VIR_FREE(tsc);
virCPUDefFree(def);
return ret;
}
@ -744,6 +782,16 @@ virCPUDefFormatBuf(virBufferPtr buf,
virBufferAsprintf(buf, "<microcode version='%u'/>\n",
def->microcodeVersion);
if (def->type == VIR_CPU_TYPE_HOST && def->tsc) {
virBufferAddLit(buf, "<counter name='tsc'");
virBufferAsprintf(buf, " frequency='%llu'", def->tsc->frequency);
if (def->tsc->scaling) {
virBufferAsprintf(buf, " scaling='%s'",
virTristateBoolTypeToString(def->tsc->scaling));
}
virBufferAddLit(buf, "/>\n");
}
if (def->sockets && def->cores && def->threads) {
virBufferAddLit(buf, "<topology");
virBufferAsprintf(buf, " sockets='%u'", def->sockets);

2
src/conf/cpu_conf.h
View File

@ -28,6 +28,7 @@
# include "virarch.h"
# include "numa_conf.h"
# include "virenum.h"
# include "virhostcpu.h"
# define VIR_CPU_VENDOR_ID_LENGTH 12
@ -139,6 +140,7 @@ struct _virCPUDef {
size_t nfeatures_max;
virCPUFeatureDefPtr features;
virCPUCacheDefPtr cache;
virHostCPUTscInfoPtr tsc;
};