Because it's fixed1 bit that enforced by TDX module.

Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
 target/i386/kvm/tdx.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index 58ea6a4d3156..bb75eb06dad9 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -439,6 +439,9 @@ static void tdx_cpu_instance_init(X86ConfidentialGuest *cg, CPUState *cpu)
 
     object_property_set_bool(OBJECT(cpu), "pmu", false, &error_abort);
 
+    /* invtsc is fixed1 for TD guest */
+    object_property_set_bool(OBJECT(cpu), "invtsc", true, &error_abort);
+
     x86cpu->enable_cpuid_0x1f = true;
 }
 
-- 
2.34.1