diff --git a/sys/amd64/amd64/initcpu.c b/sys/amd64/amd64/initcpu.c
--- a/sys/amd64/amd64/initcpu.c
+++ b/sys/amd64/amd64/initcpu.c
@@ -325,6 +325,10 @@
 		wrmsr(MSR_EFER, msr);
 		pg_nx = PG_NX;
 	}
+	if ((amd_feature2 & AMDID2_TCE) != 0) {
+		msr = rdmsr(MSR_EFER) | EFER_TCE;
+		wrmsr(MSR_EFER, msr);
+	}
 	hw_ibrs_recalculate(false);
 	hw_ssb_recalculate(false);
 	amd64_syscall_ret_flush_l1d_recalc();