Index: sys/dev/acpi/acpitz.c
===================================================================
RCS file: /home/cvs/src/sys/dev/acpi/acpitz.c,v
retrieving revision 1.58
diff -u -p -r1.58 acpitz.c
--- sys/dev/acpi/acpitz.c	6 Apr 2022 18:59:27 -0000	1.58
+++ sys/dev/acpi/acpitz.c	27 Jun 2022 07:42:36 -0000
@@ -224,6 +224,12 @@ acpitz_attach(struct device *parent, str
 	else
 		printf(": critical temperature is %d degC\n", KTOC(sc->sc_crt));
 
+	if ((sc->sc_psv = acpitz_gettempreading(sc, "_PSV")) == -1)
+		printf("  `--> no cpu throttle point defined\n");
+	else
+		printf("  `--> throttle cpu at %d degC\n", KTOC(sc->sc_psv));
+
+
 	sc->sc_hot = acpitz_gettempreading(sc, "_HOT");
 	sc->sc_tc1 = acpitz_getreading(sc, "_TC1");
 	sc->sc_tc2 = acpitz_getreading(sc, "_TC2");
@@ -383,8 +389,8 @@ acpitz_refresh(void *arg)
 		nperf = acpitz_perflevel;
 		if (sc->sc_psv <= sc->sc_tmp) {
 			/* Passive cooling enabled */
-			dnprintf(1, "%s: enabling passive %d %d\n",
-			    DEVNAME(sc), sc->sc_tmp, sc->sc_psv);
+			printf("%s: enabling passive %d degC >= %d degC\n",
+			    DEVNAME(sc), KTOC(sc->sc_tmp), KTOC(sc->sc_psv));
 			if (!sc->sc_pse)
 				sc->sc_acpi->sc_pse++;
 			sc->sc_pse = 1;
@@ -400,8 +406,8 @@ acpitz_refresh(void *arg)
 		}
 		else {
 			/* Passive cooling disabled, increase % */
-			dnprintf(1, "%s: disabling passive %d %d\n",
-			    DEVNAME(sc), sc->sc_tmp, sc->sc_psv);
+			printf("%s: disabling passive %d degC < %d degC\n",
+			    DEVNAME(sc), KTOC(sc->sc_tmp), KTOC(sc->sc_psv));
 			if (sc->sc_pse)
 				sc->sc_acpi->sc_pse--;
 			sc->sc_pse = 0;
Index: sys/arch/amd64/amd64/k1x-pstate.c
===================================================================
RCS file: /home/cvs/src/sys/arch/amd64/amd64/k1x-pstate.c,v
retrieving revision 1.11
diff -u -p -r1.11 k1x-pstate.c
--- sys/arch/amd64/amd64/k1x-pstate.c	11 Aug 2021 18:31:48 -0000	1.11
+++ sys/arch/amd64/amd64/k1x-pstate.c	27 Jun 2022 07:44:46 -0000
@@ -41,14 +41,8 @@
 
 extern int setperf_prio;
 
-#define MSR_K1X_LIMIT		0xc0010061
 #define MSR_K1X_CONTROL		0xc0010062
 #define MSR_K1X_STATUS		0xc0010063
-#define MSR_K1X_CONFIG		0xc0010064
-
-/* MSR_K1X_LIMIT */
-#define K1X_PSTATE_MAX_VAL(x)	(((x) >> 4) & 0x7)
-#define K1X_PSTATE_LIMIT(x)	(((x)) & 0x7)
 
 /* MSR_K1X_CONFIG */
 #define K1X_FID(x)		((x) & 0x3f)
@@ -95,19 +89,15 @@ void
 k1x_transition(struct k1x_cpu_state *cstate, int level)
 {
 	u_int64_t msr;
-	int i, cfid, fid = cstate->state_table[level].fid;
+	int cfid, fid = cstate->state_table[level].fid;
 
 	wrmsr(MSR_K1X_CONTROL, fid);
-	for (i = 0; i < 100; i++) {
-		msr = rdmsr(MSR_K1X_STATUS);
-		cfid = K1X_FID(msr);
-		if (cfid == fid)
-			break;
-		DELAY(100);
-	}
+	msr = rdmsr(MSR_K1X_STATUS);
+	cfid = K1X_FID(msr);
+
 	if (cfid == fid) {
 		cpuspeed = cstate->state_table[level].freq;
-#if 0
+#if 1
 		(void)printf("Target: %d Current: %d Pstate: %d\n",
 		    cstate->state_table[level].freq,
 		    cpuspeed, cfid);