Power management changes for 4.18-rc2

- Fix the PM core to avoid introducing a runtime PM usage counter
    imbalance when adding device links during driver probe (Rafael
    Wysocki).
 
  - Fix the operating performance points (OPP) framework to ensure
    that the regulator voltage is always updated as appropriate when
    updating clock rates (Waldemar Rymarkiewicz).
 
  - Fix the intel_pstate driver to use correct max/min limits for
    cores with differing maximum frequences (Srinivas Pandruvada).
 
  - Fix a typo in the intel_pstate driver documentation (Rafael
    Wysocki).
 
  - Fix two issues with the recently added Kryo cpufreq driver (Ilia
    Lin).
 
  - Fix two recent regressions and some other minor issues in the
    turbostat utility and extend it to provide some more diagnostic
    information (Len Brown, Nathan Ciobanu).
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Merge tag 'pm-4.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "These are mostly fixes, including some fixes for changes made during
  the recent merge window and some "stable" material, plus some minor
  extensions of the turbostat utility.

  Specifics:

   - Fix the PM core to avoid introducing a runtime PM usage counter
     imbalance when adding device links during driver probe (Rafael
     Wysocki).

   - Fix the operating performance points (OPP) framework to ensure that
     the regulator voltage is always updated as appropriate when
     updating clock rates (Waldemar Rymarkiewicz).

   - Fix the intel_pstate driver to use correct max/min limits for cores
     with differing maximum frequences (Srinivas Pandruvada).

   - Fix a typo in the intel_pstate driver documentation (Rafael
     Wysocki).

   - Fix two issues with the recently added Kryo cpufreq driver (Ilia
     Lin).

   - Fix two recent regressions and some other minor issues in the
     turbostat utility and extend it to provide some more diagnostic
     information (Len Brown, Nathan Ciobanu)"

* tag 'pm-4.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Documentation: intel_pstate: Fix typo
  tools/power turbostat: version 18.06.20
  tools/power turbostat: add the missing command line switches
  tools/power turbostat: add single character tokens to help
  tools/power turbostat: alphabetize the help output
  tools/power turbostat: fix segfault on 'no node' machines
  tools/power turbostat: add optional APIC X2APIC columns
  tools/power turbostat: decode cpuid.1.HT
  tools/power turbostat: fix show/hide issues resulting from mis-merge
  PM / OPP: Update voltage in case freq == old_freq
  cpufreq: intel_pstate: Fix scaling max/min limits with Turbo 3.0
  cpufreq: kryo: Add module remove and exit
  cpufreq: kryo: Fix possible error code dereference
  PM / core: Fix supplier device runtime PM usage counter imbalance

Documentation/admin-guide/pm/intel_pstate.rst

@@ -410,7 +410,7 @@ argument is passed to the kernel in the command line.
 	That only is supported in some configurations, though (for example, if
 	the `HWP feature is enabled in the processor <Active Mode With HWP_>`_,
 	the operation mode of the driver cannot be changed), and if it is not
-	supported in the current configuration, writes to this attribute with
+	supported in the current configuration, writes to this attribute will
 	fail with an appropriate error.
 
 Interpretation of Policy Attributes

drivers/base/core.c

@@ -236,6 +236,13 @@ struct device_link *device_link_add(struct device *consumer,
 			link->rpm_active = true;
 		}
 		pm_runtime_new_link(consumer);
+		/*
+		 * If the link is being added by the consumer driver at probe
+		 * time, balance the decrementation of the supplier's runtime PM
+		 * usage counter after consumer probe in driver_probe_device().
+		 */
+		if (consumer->links.status == DL_DEV_PROBING)
+			pm_runtime_get_noresume(supplier);
 	}
 	get_device(supplier);
 	link->supplier = supplier;
@@ -255,12 +262,12 @@ struct device_link *device_link_add(struct device *consumer,
 			switch (consumer->links.status) {
 			case DL_DEV_PROBING:
 				/*
-				 * Balance the decrementation of the supplier's
+				 * Some callers expect the link creation during
-				 * runtime PM usage counter after consumer probe
+				 * consumer driver probe to resume the supplier
-				 * in driver_probe_device().
+				 * even without DL_FLAG_RPM_ACTIVE.
 				 */
 				if (flags & DL_FLAG_PM_RUNTIME)
-					pm_runtime_get_sync(supplier);
+					pm_runtime_resume(supplier);
 
 				link->status = DL_STATE_CONSUMER_PROBE;
 				break;

drivers/cpufreq/intel_pstate.c

@@ -294,6 +294,7 @@ struct pstate_funcs {
 static struct pstate_funcs pstate_funcs __read_mostly;
 
 static int hwp_active __read_mostly;
+static int hwp_mode_bdw __read_mostly;
 static bool per_cpu_limits __read_mostly;
 static bool hwp_boost __read_mostly;
 
@@ -1413,7 +1414,15 @@ static void intel_pstate_get_cpu_pstates(struct cpudata *cpu)
 	cpu->pstate.turbo_pstate = pstate_funcs.get_turbo();
 	cpu->pstate.scaling = pstate_funcs.get_scaling();
 	cpu->pstate.max_freq = cpu->pstate.max_pstate * cpu->pstate.scaling;
-	cpu->pstate.turbo_freq = cpu->pstate.turbo_pstate * cpu->pstate.scaling;
+
+	if (hwp_active && !hwp_mode_bdw) {
+		unsigned int phy_max, current_max;
+
+		intel_pstate_get_hwp_max(cpu->cpu, &phy_max, &current_max);
+		cpu->pstate.turbo_freq = phy_max * cpu->pstate.scaling;
+	} else {
+		cpu->pstate.turbo_freq = cpu->pstate.turbo_pstate * cpu->pstate.scaling;
+	}
 
 	if (pstate_funcs.get_aperf_mperf_shift)
 		cpu->aperf_mperf_shift = pstate_funcs.get_aperf_mperf_shift();
@@ -2467,28 +2476,36 @@ static inline bool intel_pstate_has_acpi_ppc(void) { return false; }
 static inline void intel_pstate_request_control_from_smm(void) {}
 #endif /* CONFIG_ACPI */
 
+#define INTEL_PSTATE_HWP_BROADWELL	0x01
+
+#define ICPU_HWP(model, hwp_mode) \
+	{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_HWP, hwp_mode }
+
 static const struct x86_cpu_id hwp_support_ids[] __initconst = {
-	{ X86_VENDOR_INTEL, 6, X86_MODEL_ANY, X86_FEATURE_HWP },
+	ICPU_HWP(INTEL_FAM6_BROADWELL_X, INTEL_PSTATE_HWP_BROADWELL),
+	ICPU_HWP(INTEL_FAM6_BROADWELL_XEON_D, INTEL_PSTATE_HWP_BROADWELL),
+	ICPU_HWP(X86_MODEL_ANY, 0),
 	{}
 };
 
 static int __init intel_pstate_init(void)
 {
+	const struct x86_cpu_id *id;
 	int rc;
 
 	if (no_load)
 		return -ENODEV;
 
-	if (x86_match_cpu(hwp_support_ids)) {
+	id = x86_match_cpu(hwp_support_ids);
+	if (id) {
 		copy_cpu_funcs(&core_funcs);
 		if (!no_hwp) {
 			hwp_active++;
+			hwp_mode_bdw = id->driver_data;
 			intel_pstate.attr = hwp_cpufreq_attrs;
 			goto hwp_cpu_matched;
 		}
 	} else {
-		const struct x86_cpu_id *id;
-
 		id = x86_match_cpu(intel_pstate_cpu_ids);
 		if (!id)
 			return -ENODEV;

drivers/cpufreq/qcom-cpufreq-kryo.c

@@ -42,6 +42,8 @@ enum _msm8996_version {
 	NUM_OF_MSM8996_VERSIONS,
 };
 
+struct platform_device *cpufreq_dt_pdev, *kryo_cpufreq_pdev;
+
 static enum _msm8996_version __init qcom_cpufreq_kryo_get_msm_id(void)
 {
 	size_t len;
@@ -74,7 +76,6 @@ static enum _msm8996_version __init qcom_cpufreq_kryo_get_msm_id(void)
 static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
 {
 	struct opp_table *opp_tables[NR_CPUS] = {0};
-	struct platform_device *cpufreq_dt_pdev;
 	enum _msm8996_version msm8996_version;
 	struct nvmem_cell *speedbin_nvmem;
 	struct device_node *np;
@@ -115,6 +116,8 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
 
 	speedbin = nvmem_cell_read(speedbin_nvmem, &len);
 	nvmem_cell_put(speedbin_nvmem);
+	if (IS_ERR(speedbin))
+		return PTR_ERR(speedbin);
 
 	switch (msm8996_version) {
 	case MSM8996_V3:
@@ -127,6 +130,7 @@ static int qcom_cpufreq_kryo_probe(struct platform_device *pdev)
 		BUG();
 		break;
 	}
+	kfree(speedbin);
 
 	for_each_possible_cpu(cpu) {
 		cpu_dev = get_cpu_device(cpu);
@@ -162,8 +166,15 @@ free_opp:
 	return ret;
 }
 
+static int qcom_cpufreq_kryo_remove(struct platform_device *pdev)
+{
+	platform_device_unregister(cpufreq_dt_pdev);
+	return 0;
+}
+
 static struct platform_driver qcom_cpufreq_kryo_driver = {
 	.probe = qcom_cpufreq_kryo_probe,
+	.remove = qcom_cpufreq_kryo_remove,
 	.driver = {
 		.name = "qcom-cpufreq-kryo",
 	},
@@ -198,8 +209,9 @@ static int __init qcom_cpufreq_kryo_init(void)
 	if (unlikely(ret < 0))
 		return ret;
 
-	ret = PTR_ERR_OR_ZERO(platform_device_register_simple(
+	kryo_cpufreq_pdev = platform_device_register_simple(
-		"qcom-cpufreq-kryo", -1, NULL, 0));
+		"qcom-cpufreq-kryo", -1, NULL, 0);
+	ret = PTR_ERR_OR_ZERO(kryo_cpufreq_pdev);
 	if (0 == ret)
 		return 0;
 
@@ -208,5 +220,12 @@ static int __init qcom_cpufreq_kryo_init(void)
 }
 module_init(qcom_cpufreq_kryo_init);
 
+static void __init qcom_cpufreq_kryo_exit(void)
+{
+	platform_device_unregister(kryo_cpufreq_pdev);
+	platform_driver_unregister(&qcom_cpufreq_kryo_driver);
+}
+module_exit(qcom_cpufreq_kryo_exit);
+
 MODULE_DESCRIPTION("Qualcomm Technologies, Inc. Kryo CPUfreq driver");
 MODULE_LICENSE("GPL v2");

drivers/opp/core.c

@@ -598,7 +598,7 @@ static int _generic_set_opp_regulator(const struct opp_table *opp_table,
 	}
 
 	/* Scaling up? Scale voltage before frequency */
-	if (freq > old_freq) {
+	if (freq >= old_freq) {
 		ret = _set_opp_voltage(dev, reg, new_supply);
 		if (ret)
 			goto restore_voltage;

tools/power/x86/turbostat/turbostat.8

@@ -56,7 +56,7 @@ name as necessary to disambiguate it from others is necessary.  Note that option
 .PP
 \fB--hide column\fP do not show the specified built-in columns.  May be invoked multiple times, or with a comma-separated list of column names.  Use "--hide sysfs" to hide the sysfs statistics columns as a group.
 .PP
-\fB--enable column\fP show the specified built-in columns, which are otherwise disabled, by default.  Currently the only built-in counters disabled by default are "usec" and "Time_Of_Day_Seconds".
+\fB--enable column\fP show the specified built-in columns, which are otherwise disabled, by default.  Currently the only built-in counters disabled by default are "usec", "Time_Of_Day_Seconds", "APIC" and "X2APIC".
 The column name "all" can be used to enable all disabled-by-default built-in counters.
 .PP
 \fB--show column\fP show only the specified built-in columns.  May be invoked multiple times, or with a comma-separated list of column names.  Use "--show sysfs" to show the sysfs statistics columns as a group.

tools/power/x86/turbostat/turbostat.c

@@ -109,6 +109,7 @@ unsigned int has_hwp_activity_window;	/* IA32_HWP_REQUEST[bits 41:32] */
 unsigned int has_hwp_epp;		/* IA32_HWP_REQUEST[bits 31:24] */
 unsigned int has_hwp_pkg;		/* IA32_HWP_REQUEST_PKG */
 unsigned int has_misc_feature_control;
+unsigned int first_counter_read = 1;
 
 #define RAPL_PKG		(1 << 0)
 					/* 0x610 MSR_PKG_POWER_LIMIT */
@@ -170,6 +171,8 @@ struct thread_data {
 	unsigned long long  irq_count;
 	unsigned int smi_count;
 	unsigned int cpu_id;
+	unsigned int apic_id;
+	unsigned int x2apic_id;
 	unsigned int flags;
 #define CPU_IS_FIRST_THREAD_IN_CORE	0x2
 #define CPU_IS_FIRST_CORE_IN_PACKAGE	0x4
@@ -381,19 +384,23 @@ int get_msr(int cpu, off_t offset, unsigned long long *msr)
 }
 
 /*
- * Each string in this array is compared in --show and --hide cmdline.
+ * This list matches the column headers, except
- * Thus, strings that are proper sub-sets must follow their more specific peers.
+ * 1. built-in only, the sysfs counters are not here -- we learn of those at run-time
+ * 2. Core and CPU are moved to the end, we can't have strings that contain them
+ *    matching on them for --show and --hide.
  */
 struct msr_counter bic[] = {
 	{ 0x0, "usec" },
 	{ 0x0, "Time_Of_Day_Seconds" },
 	{ 0x0, "Package" },
+	{ 0x0, "Node" },
 	{ 0x0, "Avg_MHz" },
+	{ 0x0, "Busy%" },
 	{ 0x0, "Bzy_MHz" },
 	{ 0x0, "TSC_MHz" },
 	{ 0x0, "IRQ" },
 	{ 0x0, "SMI", "", 32, 0, FORMAT_DELTA, NULL},
-	{ 0x0, "Busy%" },
+	{ 0x0, "sysfs" },
 	{ 0x0, "CPU%c1" },
 	{ 0x0, "CPU%c3" },
 	{ 0x0, "CPU%c6" },
@@ -424,73 +431,73 @@ struct msr_counter bic[] = {
 	{ 0x0, "Cor_J" },
 	{ 0x0, "GFX_J" },
 	{ 0x0, "RAM_J" },
-	{ 0x0, "Core" },
-	{ 0x0, "CPU" },
 	{ 0x0, "Mod%c6" },
-	{ 0x0, "sysfs" },
 	{ 0x0, "Totl%C0" },
 	{ 0x0, "Any%C0" },
 	{ 0x0, "GFX%C0" },
 	{ 0x0, "CPUGFX%" },
-	{ 0x0, "Node%" },
+	{ 0x0, "Core" },
+	{ 0x0, "CPU" },
+	{ 0x0, "APIC" },
+	{ 0x0, "X2APIC" },
 };
 
-
-
 #define MAX_BIC (sizeof(bic) / sizeof(struct msr_counter))
 #define	BIC_USEC	(1ULL << 0)
 #define	BIC_TOD		(1ULL << 1)
 #define	BIC_Package	(1ULL << 2)
-#define	BIC_Avg_MHz	(1ULL << 3)
+#define	BIC_Node	(1ULL << 3)
-#define	BIC_Bzy_MHz	(1ULL << 4)
+#define	BIC_Avg_MHz	(1ULL << 4)
-#define	BIC_TSC_MHz	(1ULL << 5)
+#define	BIC_Busy	(1ULL << 5)
-#define	BIC_IRQ		(1ULL << 6)
+#define	BIC_Bzy_MHz	(1ULL << 6)
-#define	BIC_SMI		(1ULL << 7)
+#define	BIC_TSC_MHz	(1ULL << 7)
-#define	BIC_Busy	(1ULL << 8)
+#define	BIC_IRQ		(1ULL << 8)
-#define	BIC_CPU_c1	(1ULL << 9)
+#define	BIC_SMI		(1ULL << 9)
-#define	BIC_CPU_c3	(1ULL << 10)
+#define	BIC_sysfs	(1ULL << 10)
-#define	BIC_CPU_c6	(1ULL << 11)
+#define	BIC_CPU_c1	(1ULL << 11)
-#define	BIC_CPU_c7	(1ULL << 12)
+#define	BIC_CPU_c3	(1ULL << 12)
-#define	BIC_ThreadC	(1ULL << 13)
+#define	BIC_CPU_c6	(1ULL << 13)
-#define	BIC_CoreTmp	(1ULL << 14)
+#define	BIC_CPU_c7	(1ULL << 14)
-#define	BIC_CoreCnt	(1ULL << 15)
+#define	BIC_ThreadC	(1ULL << 15)
-#define	BIC_PkgTmp	(1ULL << 16)
+#define	BIC_CoreTmp	(1ULL << 16)
-#define	BIC_GFX_rc6	(1ULL << 17)
+#define	BIC_CoreCnt	(1ULL << 17)
-#define	BIC_GFXMHz	(1ULL << 18)
+#define	BIC_PkgTmp	(1ULL << 18)
-#define	BIC_Pkgpc2	(1ULL << 19)
+#define	BIC_GFX_rc6	(1ULL << 19)
-#define	BIC_Pkgpc3	(1ULL << 20)
+#define	BIC_GFXMHz	(1ULL << 20)
-#define	BIC_Pkgpc6	(1ULL << 21)
+#define	BIC_Pkgpc2	(1ULL << 21)
-#define	BIC_Pkgpc7	(1ULL << 22)
+#define	BIC_Pkgpc3	(1ULL << 22)
-#define	BIC_Pkgpc8	(1ULL << 23)
+#define	BIC_Pkgpc6	(1ULL << 23)
-#define	BIC_Pkgpc9	(1ULL << 24)
+#define	BIC_Pkgpc7	(1ULL << 24)
-#define	BIC_Pkgpc10	(1ULL << 25)
+#define	BIC_Pkgpc8	(1ULL << 25)
-#define BIC_CPU_LPI	(1ULL << 26)
+#define	BIC_Pkgpc9	(1ULL << 26)
-#define BIC_SYS_LPI	(1ULL << 27)
+#define	BIC_Pkgpc10	(1ULL << 27)
-#define	BIC_PkgWatt	(1ULL << 26)
+#define BIC_CPU_LPI	(1ULL << 28)
-#define	BIC_CorWatt	(1ULL << 27)
+#define BIC_SYS_LPI	(1ULL << 29)
-#define	BIC_GFXWatt	(1ULL << 28)
+#define	BIC_PkgWatt	(1ULL << 30)
-#define	BIC_PkgCnt	(1ULL << 29)
+#define	BIC_CorWatt	(1ULL << 31)
-#define	BIC_RAMWatt	(1ULL << 30)
+#define	BIC_GFXWatt	(1ULL << 32)
-#define	BIC_PKG__	(1ULL << 31)
+#define	BIC_PkgCnt	(1ULL << 33)
-#define	BIC_RAM__	(1ULL << 32)
+#define	BIC_RAMWatt	(1ULL << 34)
-#define	BIC_Pkg_J	(1ULL << 33)
+#define	BIC_PKG__	(1ULL << 35)
-#define	BIC_Cor_J	(1ULL << 34)
+#define	BIC_RAM__	(1ULL << 36)
-#define	BIC_GFX_J	(1ULL << 35)
+#define	BIC_Pkg_J	(1ULL << 37)
-#define	BIC_RAM_J	(1ULL << 36)
+#define	BIC_Cor_J	(1ULL << 38)
-#define	BIC_Core	(1ULL << 37)
+#define	BIC_GFX_J	(1ULL << 39)
-#define	BIC_CPU		(1ULL << 38)
+#define	BIC_RAM_J	(1ULL << 40)
-#define	BIC_Mod_c6	(1ULL << 39)
+#define	BIC_Mod_c6	(1ULL << 41)
-#define	BIC_sysfs	(1ULL << 40)
+#define	BIC_Totl_c0	(1ULL << 42)
-#define	BIC_Totl_c0	(1ULL << 41)
+#define	BIC_Any_c0	(1ULL << 43)
-#define	BIC_Any_c0	(1ULL << 42)
+#define	BIC_GFX_c0	(1ULL << 44)
-#define	BIC_GFX_c0	(1ULL << 43)
+#define	BIC_CPUGFX	(1ULL << 45)
-#define	BIC_CPUGFX	(1ULL << 44)
+#define	BIC_Core	(1ULL << 46)
-#define	BIC_Node	(1ULL << 45)
+#define	BIC_CPU		(1ULL << 47)
+#define	BIC_APIC	(1ULL << 48)
+#define	BIC_X2APIC	(1ULL << 49)
 
-#define BIC_DISABLED_BY_DEFAULT	(BIC_USEC | BIC_TOD)
+#define BIC_DISABLED_BY_DEFAULT	(BIC_USEC | BIC_TOD | BIC_APIC | BIC_X2APIC)
 
 unsigned long long bic_enabled = (0xFFFFFFFFFFFFFFFFULL & ~BIC_DISABLED_BY_DEFAULT);
-unsigned long long bic_present = BIC_USEC | BIC_TOD | BIC_sysfs;
+unsigned long long bic_present = BIC_USEC | BIC_TOD | BIC_sysfs | BIC_APIC | BIC_X2APIC;
 
 #define DO_BIC(COUNTER_NAME) (bic_enabled & bic_present & COUNTER_NAME)
 #define ENABLE_BIC(COUNTER_NAME) (bic_enabled |= COUNTER_NAME)
@@ -517,17 +524,34 @@ void help(void)
 	"when COMMAND completes.\n"
 	"If no COMMAND is specified, turbostat wakes every 5-seconds\n"
 	"to print statistics, until interrupted.\n"
-	"--add		add a counter\n"
+	"  -a, --add	add a counter\n"
-	"		eg. --add msr0x10,u64,cpu,delta,MY_TSC\n"
+	"		  eg. --add msr0x10,u64,cpu,delta,MY_TSC\n"
-	"--cpu	cpu-set	limit output to summary plus cpu-set:\n"
+	"  -c, --cpu	cpu-set	limit output to summary plus cpu-set:\n"
-	"		{core | package | j,k,l..m,n-p }\n"
+	"		  {core | package | j,k,l..m,n-p }\n"
-	"--quiet	skip decoding system configuration header\n"
+	"  -d, --debug	displays usec, Time_Of_Day_Seconds and more debugging\n"
-	"--interval sec.subsec	Override default 5-second measurement interval\n"
+	"  -D, --Dump	displays the raw counter values\n"
-	"--help		print this help message\n"
+	"  -e, --enable	[all | column]\n"
-	"--list		list column headers only\n"
+	"		shows all or the specified disabled column\n"
-	"--num_iterations num   number of the measurement iterations\n"
+	"  -H, --hide [column|column,column,...]\n"
-	"--out file	create or truncate \"file\" for all output\n"
+	"		hide the specified column(s)\n"
-	"--version	print version information\n"
+	"  -i, --interval sec.subsec\n"
+	"		Override default 5-second measurement interval\n"
+	"  -J, --Joules	displays energy in Joules instead of Watts\n"
+	"  -l, --list	list column headers only\n"
+	"  -n, --num_iterations num\n"
+	"		number of the measurement iterations\n"
+	"  -o, --out file\n"
+	"		create or truncate \"file\" for all output\n"
+	"  -q, --quiet	skip decoding system configuration header\n"
+	"  -s, --show [column|column,column,...]\n"
+	"		show only the specified column(s)\n"
+	"  -S, --Summary\n"
+	"		limits output to 1-line system summary per interval\n"
+	"  -T, --TCC temperature\n"
+	"		sets the Thermal Control Circuit temperature in\n"
+	"		  degrees Celsius\n"
+	"  -h, --help	print this help message\n"
+	"  -v, --version	print version information\n"
 	"\n"
 	"For more help, run \"man turbostat\"\n");
 }
@@ -601,6 +625,10 @@ void print_header(char *delim)
 		outp += sprintf(outp, "%sCore", (printed++ ? delim : ""));
 	if (DO_BIC(BIC_CPU))
 		outp += sprintf(outp, "%sCPU", (printed++ ? delim : ""));
+	if (DO_BIC(BIC_APIC))
+		outp += sprintf(outp, "%sAPIC", (printed++ ? delim : ""));
+	if (DO_BIC(BIC_X2APIC))
+		outp += sprintf(outp, "%sX2APIC", (printed++ ? delim : ""));
 	if (DO_BIC(BIC_Avg_MHz))
 		outp += sprintf(outp, "%sAvg_MHz", (printed++ ? delim : ""));
 	if (DO_BIC(BIC_Busy))
@@ -880,6 +908,10 @@ int format_counters(struct thread_data *t, struct core_data *c,
 			outp += sprintf(outp, "%s-", (printed++ ? delim : ""));
 		if (DO_BIC(BIC_CPU))
 			outp += sprintf(outp, "%s-", (printed++ ? delim : ""));
+		if (DO_BIC(BIC_APIC))
+			outp += sprintf(outp, "%s-", (printed++ ? delim : ""));
+		if (DO_BIC(BIC_X2APIC))
+			outp += sprintf(outp, "%s-", (printed++ ? delim : ""));
 	} else {
 		if (DO_BIC(BIC_Package)) {
 			if (p)
@@ -904,6 +936,10 @@ int format_counters(struct thread_data *t, struct core_data *c,
 		}
 		if (DO_BIC(BIC_CPU))
 			outp += sprintf(outp, "%s%d", (printed++ ? delim : ""), t->cpu_id);
+		if (DO_BIC(BIC_APIC))
+			outp += sprintf(outp, "%s%d", (printed++ ? delim : ""), t->apic_id);
+		if (DO_BIC(BIC_X2APIC))
+			outp += sprintf(outp, "%s%d", (printed++ ? delim : ""), t->x2apic_id);
 	}
 
 	if (DO_BIC(BIC_Avg_MHz))
@@ -1231,6 +1267,12 @@ delta_thread(struct thread_data *new, struct thread_data *old,
 	int i;
 	struct msr_counter *mp;
 
+	/* we run cpuid just the 1st time, copy the results */
+	if (DO_BIC(BIC_APIC))
+		new->apic_id = old->apic_id;
+	if (DO_BIC(BIC_X2APIC))
+		new->x2apic_id = old->x2apic_id;
+
 	/*
 	 * the timestamps from start of measurement interval are in "old"
 	 * the timestamp from end of measurement interval are in "new"
@@ -1393,6 +1435,12 @@ int sum_counters(struct thread_data *t, struct core_data *c,
 	int i;
 	struct msr_counter *mp;
 
+	/* copy un-changing apic_id's */
+	if (DO_BIC(BIC_APIC))
+		average.threads.apic_id = t->apic_id;
+	if (DO_BIC(BIC_X2APIC))
+		average.threads.x2apic_id = t->x2apic_id;
+
 	/* remember first tv_begin */
 	if (average.threads.tv_begin.tv_sec == 0)
 		average.threads.tv_begin = t->tv_begin;
@@ -1619,6 +1667,34 @@ int get_mp(int cpu, struct msr_counter *mp, unsigned long long *counterp)
 	return 0;
 }
 
+void get_apic_id(struct thread_data *t)
+{
+	unsigned int eax, ebx, ecx, edx, max_level;
+
+	eax = ebx = ecx = edx = 0;
+
+	if (!genuine_intel)
+		return;
+
+	__cpuid(0, max_level, ebx, ecx, edx);
+
+	__cpuid(1, eax, ebx, ecx, edx);
+	t->apic_id = (ebx >> 24) & 0xf;
+
+	if (max_level < 0xb)
+		return;
+
+	if (!DO_BIC(BIC_X2APIC))
+		return;
+
+	ecx = 0;
+	__cpuid(0xb, eax, ebx, ecx, edx);
+	t->x2apic_id = edx;
+
+	if (debug && (t->apic_id != t->x2apic_id))
+		fprintf(stderr, "cpu%d: apic 0x%x x2apic 0x%x\n", t->cpu_id, t->apic_id, t->x2apic_id);
+}
+
 /*
  * get_counters(...)
  * migrate to cpu
@@ -1632,7 +1708,6 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 	struct msr_counter *mp;
 	int i;
 
-
 	gettimeofday(&t->tv_begin, (struct timezone *)NULL);
 
 	if (cpu_migrate(cpu)) {
@@ -1640,6 +1715,8 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
 		return -1;
 	}
 
+	if (first_counter_read)
+		get_apic_id(t);
 retry:
 	t->tsc = rdtsc();	/* we are running on local CPU of interest */
 
@@ -2432,6 +2509,12 @@ void set_node_data(void)
 		if (pni[pkg].count > topo.nodes_per_pkg)
 			topo.nodes_per_pkg = pni[0].count;
 
+	/* Fake 1 node per pkg for machines that don't
+	 * expose nodes and thus avoid -nan results
+	 */
+	if (topo.nodes_per_pkg == 0)
+		topo.nodes_per_pkg = 1;
+
 	for (cpu = 0; cpu < topo.num_cpus; cpu++) {
 		pkg = cpus[cpu].physical_package_id;
 		node = cpus[cpu].physical_node_id;
@@ -2879,6 +2962,7 @@ void do_sleep(void)
 	}
 }
 
+
 void turbostat_loop()
 {
 	int retval;
@@ -2892,6 +2976,7 @@ restart:
 
 	snapshot_proc_sysfs_files();
 	retval = for_all_cpus(get_counters, EVEN_COUNTERS);
+	first_counter_read = 0;
 	if (retval < -1) {
 		exit(retval);
 	} else if (retval == -1) {
@@ -4392,7 +4477,7 @@ void process_cpuid()
 	if (!quiet) {
 		fprintf(outf, "%d CPUID levels; family:model:stepping 0x%x:%x:%x (%d:%d:%d)\n",
 			max_level, family, model, stepping, family, model, stepping);
-		fprintf(outf, "CPUID(1): %s %s %s %s %s %s %s %s %s\n",
+		fprintf(outf, "CPUID(1): %s %s %s %s %s %s %s %s %s %s\n",
 			ecx & (1 << 0) ? "SSE3" : "-",
 			ecx & (1 << 3) ? "MONITOR" : "-",
 			ecx & (1 << 6) ? "SMX" : "-",
@@ -4401,6 +4486,7 @@ void process_cpuid()
 			edx & (1 << 4) ? "TSC" : "-",
 			edx & (1 << 5) ? "MSR" : "-",
 			edx & (1 << 22) ? "ACPI-TM" : "-",
+			edx & (1 << 28) ? "HT" : "-",
 			edx & (1 << 29) ? "TM" : "-");
 	}
 
@@ -4652,7 +4738,6 @@ void process_cpuid()
 	return;
 }
 
-
 /*
  * in /dev/cpu/ return success for names that are numbers
  * ie. filter out ".", "..", "microcode".
@@ -4842,6 +4927,13 @@ void init_counter(struct thread_data *thread_base, struct core_data *core_base,
 	struct core_data *c;
 	struct pkg_data *p;
 
+
+	/* Workaround for systems where physical_node_id==-1
+	 * and logical_node_id==(-1 - topo.num_cpus)
+	 */
+	if (node_id < 0)
+		node_id = 0;
+
 	t = GET_THREAD(thread_base, thread_id, core_id, node_id, pkg_id);
 	c = GET_CORE(core_base, core_id, node_id, pkg_id);
 	p = GET_PKG(pkg_base, pkg_id);
@@ -4946,6 +5038,7 @@ int fork_it(char **argv)
 
 	snapshot_proc_sysfs_files();
 	status = for_all_cpus(get_counters, EVEN_COUNTERS);
+	first_counter_read = 0;
 	if (status)
 		exit(status);
 	/* clear affinity side-effect of get_counters() */
@@ -5009,7 +5102,7 @@ int get_and_dump_counters(void)
 }
 
 void print_version() {
-	fprintf(outf, "turbostat version 18.06.01"
+	fprintf(outf, "turbostat version 18.06.20"
 		" - Len Brown <lenb@kernel.org>\n");
 }
 
@@ -5381,7 +5474,7 @@ void cmdline(int argc, char **argv)
 			break;
 		case 'e':
 			/* --enable specified counter */
-			bic_enabled |= bic_lookup(optarg, SHOW_LIST);
+			bic_enabled = bic_enabled | bic_lookup(optarg, SHOW_LIST);
 			break;
 		case 'd':
 			debug++;
@@ -5465,7 +5558,6 @@ void cmdline(int argc, char **argv)
 int main(int argc, char **argv)
 {
 	outf = stderr;
-
 	cmdline(argc, argv);
 
 	if (!quiet)