When the host CPU supports invariant TSC the host CPU definition created
by virCPUx86GetHost will contain (unless probing fails for some reason)
addition TSC related data.
Signed-off-by: Jiri Denemark <jdenemar@xxxxxxxxxx>
---
src/cpu/cpu_x86.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/src/cpu/cpu_x86.c b/src/cpu/cpu_x86.c
index cb03123787..689b6cdaf5 100644
--- a/src/cpu/cpu_x86.c
+++ b/src/cpu/cpu_x86.c
@@ -2762,6 +2762,15 @@ virCPUx86GetHost(virCPUDefPtr cpu,
ret = x86DecodeCPUData(cpu, cpuData, models);
cpu->microcodeVersion = virHostCPUGetMicrocodeVersion();
+ /* Probing for TSC frequency makes sense only if the CPU supports
+ * invariant TSC (Linux calls this constant_tsc in /proc/cpuinfo). */
+ if (virCPUx86DataCheckFeature(cpuData, "invtsc") == 1) {
+ VIR_DEBUG("Checking invariant TSC frequency");
+ cpu->tsc = virHostCPUGetTscInfo();
+ } else {
+ VIR_DEBUG("Host CPU does not support invariant TSC");
+ }
+
cleanup:
virCPUx86DataFree(cpuData);
return ret;
--
2.21.0
--
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