Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

8 files changed, 685 insertions, 0 deletions

diff --git a/tools/power/cpupower/debug/i386/Makefile b/tools/power/cpupower/debug/i386/Makefile
new file mode 100644
index 000000000..b3f771039
--- /dev/null
+++ b/tools/power/cpupower/debug/i386/Makefile
@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: GPL-2.0
+OUTPUT=./
+ifeq ("$(origin O)", "command line")
+	OUTPUT := $(O)/
+endif
+
+DESTDIR =
+bindir  = /usr/bin
+
+INSTALL = /usr/bin/install
+
+
+default: all
+
+$(OUTPUT)centrino-decode: centrino-decode.c
+	$(CC) $(CFLAGS) -o $@ centrino-decode.c
+
+$(OUTPUT)dump_psb: dump_psb.c
+	$(CC) $(CFLAGS) -o $@ dump_psb.c
+
+$(OUTPUT)intel_gsic: intel_gsic.c
+	$(CC) $(CFLAGS) -o $@ -llrmi intel_gsic.c
+
+$(OUTPUT)powernow-k8-decode: powernow-k8-decode.c
+	$(CC) $(CFLAGS) -o $@ powernow-k8-decode.c
+
+all: $(OUTPUT)centrino-decode $(OUTPUT)dump_psb $(OUTPUT)intel_gsic $(OUTPUT)powernow-k8-decode
+
+clean:
+	rm -rf $(OUTPUT)centrino-decode
+	rm -rf $(OUTPUT)dump_psb
+	rm -rf $(OUTPUT)intel_gsic
+	rm -rf $(OUTPUT)powernow-k8-decode
+
+install:
+	$(INSTALL) -d $(DESTDIR)${bindir}
+	$(INSTALL) $(OUTPUT)centrino-decode $(DESTDIR)${bindir}
+	$(INSTALL) $(OUTPUT)powernow-k8-decode $(DESTDIR)${bindir}
+	$(INSTALL) $(OUTPUT)dump_psb $(DESTDIR)${bindir}
+	$(INSTALL) $(OUTPUT)intel_gsic $(DESTDIR)${bindir}
+
+.PHONY: all default clean install
diff --git a/tools/power/cpupower/debug/i386/centrino-decode.c b/tools/power/cpupower/debug/i386/centrino-decode.c
new file mode 100644
index 000000000..700cd31a7
--- /dev/null
+++ b/tools/power/cpupower/debug/i386/centrino-decode.c
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  (C) 2003 - 2004  Dominik Brodowski <linux@dominikbrodowski.de>
+ *
+ * Based on code found in
+ * linux/arch/i386/kernel/cpu/cpufreq/speedstep-centrino.c
+ * and originally developed by Jeremy Fitzhardinge.
+ *
+ * USAGE: simply run it to decode the current settings on CPU 0,
+ *	  or pass the CPU number as argument, or pass the MSR content
+ *	  as argument.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#define MCPU	32
+
+#define MSR_IA32_PERF_STATUS	0x198
+
+static int rdmsr(unsigned int cpu, unsigned int msr,
+		 unsigned int *lo, unsigned int *hi)
+{
+	int fd;
+	char file[20];
+	unsigned long long val;
+	int retval = -1;
+
+	*lo = *hi = 0;
+
+	if (cpu > MCPU)
+		goto err1;
+
+	sprintf(file, "/dev/cpu/%d/msr", cpu);
+	fd = open(file, O_RDONLY);
+
+	if (fd < 0)
+		goto err1;
+
+	if (lseek(fd, msr, SEEK_CUR) == -1)
+		goto err2;
+
+	if (read(fd, &val, 8) != 8)
+		goto err2;
+
+	*lo = (uint32_t )(val & 0xffffffffull);
+	*hi = (uint32_t )(val>>32 & 0xffffffffull);
+
+	retval = 0;
+err2:
+	close(fd);
+err1:
+	return retval;
+}
+
+static void decode (unsigned int msr)
+{
+	unsigned int multiplier;
+	unsigned int mv;
+
+	multiplier = ((msr >> 8) & 0xFF);
+
+	mv = (((msr & 0xFF) * 16) + 700);
+
+	printf("0x%x means multiplier %d @ %d mV\n", msr, multiplier, mv);
+}
+
+static int decode_live(unsigned int cpu)
+{
+	unsigned int lo, hi;
+	int err;
+
+	err = rdmsr(cpu, MSR_IA32_PERF_STATUS, &lo, &hi);
+
+	if (err) {
+		printf("can't get MSR_IA32_PERF_STATUS for cpu %d\n", cpu);
+		printf("Possible trouble: you don't run an Enhanced SpeedStep capable cpu\n");
+		printf("or you are not root, or the msr driver is not present\n");
+		return 1;
+	}
+
+	decode(lo);
+
+	return 0;
+}
+
+int main (int argc, char **argv)
+{
+	unsigned int cpu, mode = 0;
+
+	if (argc < 2)
+		cpu = 0;
+	else {
+		cpu = strtoul(argv[1], NULL, 0);
+		if (cpu >= MCPU)
+			mode = 1;
+	}
+
+	if (mode)
+		decode(cpu);
+	else
+		decode_live(cpu);
+
+	return 0;
+}
diff --git a/tools/power/cpupower/debug/i386/dump_psb.c b/tools/power/cpupower/debug/i386/dump_psb.c
new file mode 100644
index 000000000..6fb81b42e
--- /dev/null
+++ b/tools/power/cpupower/debug/i386/dump_psb.c
@@ -0,0 +1,194 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// dump_psb. (c) 2004, Dave Jones, Red Hat Inc.
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#define _GNU_SOURCE
+#include <getopt.h>
+
+#include <sys/mman.h>
+
+#define LEN (0x100000 - 0xc0000)
+#define OFFSET (0xc0000)
+
+#ifndef __packed
+#define __packed __attribute((packed))
+#endif
+
+static long relevant;
+
+static const int fid_to_mult[32] = {
+	110, 115, 120, 125, 50, 55, 60, 65,
+	70, 75, 80, 85, 90, 95, 100, 105,
+	30, 190, 40, 200, 130, 135, 140, 210,
+	150, 225, 160, 165, 170, 180, -1, -1,
+};
+
+static const int vid_to_voltage[32] = {
+	2000, 1950, 1900, 1850, 1800, 1750, 1700, 1650,
+	1600, 1550, 1500, 1450, 1400, 1350, 1300, 0,
+	1275, 1250, 1225, 1200, 1175, 1150, 1125, 1100,
+	1075, 1050, 1024, 1000, 975, 950, 925, 0,
+};
+
+struct psb_header {
+	char signature[10];
+	u_char version;
+	u_char flags;
+	u_short settlingtime;
+	u_char res1;
+	u_char numpst;
+} __packed;
+
+struct pst_header {
+	u_int32_t cpuid;
+	u_char fsb;
+	u_char maxfid;
+	u_char startvid;
+	u_char numpstates;
+} __packed;
+
+static u_int fsb;
+static u_int sgtc;
+
+static int
+decode_pst(char *p, int npstates)
+{
+	int i;
+	int freq, fid, vid;
+
+	for (i = 0; i < npstates; ++i) {
+		fid = *p++;
+		vid = *p++;
+		freq = 100 * fid_to_mult[fid] * fsb;
+
+		printf("   %2d %8dkHz  FID %02x (%2d.%01d)  VID %02x (%4dmV)\n",
+		       i,
+		       freq,
+		       fid, fid_to_mult[fid]/10, fid_to_mult[fid]%10,
+		       vid, vid_to_voltage[vid]);
+	}
+
+	return 0;
+}
+
+static
+void decode_psb(char *p, int numpst)
+{
+	int i;
+	struct psb_header *psb;
+	struct pst_header *pst;
+
+	psb = (struct psb_header*) p;
+
+	if (psb->version != 0x12)
+		return;
+
+	printf("PSB version: %hhx flags: %hhx settling time %hhuus res1 %hhx num pst %hhu\n",
+			psb->version,
+			psb->flags,
+			psb->settlingtime,
+			psb->res1,
+			psb->numpst);
+	sgtc = psb->settlingtime * 100;
+
+	if (sgtc < 10000)
+		sgtc = 10000;
+
+	p = ((char *) psb) + sizeof(struct psb_header);
+
+	if (numpst < 0)
+		numpst = psb->numpst;
+	else
+		printf("Overriding number of pst :%d\n", numpst);
+
+	for (i = 0; i < numpst; i++) {
+		pst = (struct pst_header*) p;
+
+		if (relevant != 0) {
+			if (relevant!= pst->cpuid)
+				goto next_one;
+		}
+
+		printf("  PST %d  cpuid %.3x fsb %hhu mfid %hhx svid %hhx numberstates %hhu\n",
+				i+1,
+				pst->cpuid,
+				pst->fsb,
+				pst->maxfid,
+				pst->startvid,
+				pst->numpstates);
+
+		fsb = pst->fsb;
+		decode_pst(p + sizeof(struct pst_header), pst->numpstates);
+
+next_one:
+		p += sizeof(struct pst_header) + 2*pst->numpstates;
+	}
+
+}
+
+static struct option info_opts[] = {
+     {"numpst", no_argument, NULL, 'n'},
+};
+
+void print_help(void)
+{
+	printf ("Usage: dump_psb [options]\n");
+	printf ("Options:\n");
+	printf ("  -n, --numpst     Set number of PST tables to scan\n");
+	printf ("  -r, --relevant   Only display PSTs relevant to cpuid N\n");
+}
+
+int
+main(int argc, char *argv[])
+{
+	int fd;
+	int numpst=-1;
+	int ret=0, cont=1;
+	char *mem = NULL;
+	char *p;
+
+	do {
+		ret = getopt_long(argc, argv, "hr:n:", info_opts, NULL);
+		switch (ret){
+		case '?':
+		case 'h':
+			print_help();
+			cont = 0;
+			break;
+		case 'r':
+			relevant = strtol(optarg, NULL, 16);
+			break;
+		case 'n':
+			numpst = strtol(optarg, NULL, 10);
+			break;
+		case -1:
+			cont = 0;
+			break;
+		}
+
+	} while(cont);
+
+	fd = open("/dev/mem", O_RDONLY);
+	if (fd < 0) {
+		printf ("Couldn't open /dev/mem. Are you root?\n");
+		exit(1);
+	}
+
+	mem = mmap(mem, 0x100000 - 0xc0000, PROT_READ, MAP_SHARED, fd, 0xc0000);
+	close(fd);
+
+	for (p = mem; p - mem < LEN; p+=16) {
+		if (memcmp(p, "AMDK7PNOW!", 10) == 0) {
+			decode_psb(p, numpst);
+			break;
+		}
+	}
+
+	munmap(mem, LEN);
+	return 0;
+}
diff --git a/tools/power/cpupower/debug/i386/intel_gsic.c b/tools/power/cpupower/debug/i386/intel_gsic.c
new file mode 100644
index 000000000..befd837f0
--- /dev/null
+++ b/tools/power/cpupower/debug/i386/intel_gsic.c
@@ -0,0 +1,77 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  (C) 2003  Bruno Ducrot
+ *  (C) 2004  Dominik Brodowski <linux@dominikbrodowski.de>
+ *
+ * Based on code found in
+ * linux/include/asm-i386/ist.h and linux/arch/i386/kernel/setup.c
+ * and originally developed by Andy Grover <andrew.grover@intel.com>
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <lrmi.h>
+
+int main (void)
+{
+	struct LRMI_regs	r;
+	int			retval;
+
+	if (!LRMI_init())
+		return 0;
+
+	memset(&r, 0, sizeof(r));
+
+	r.eax = 0x0000E980;
+	r.edx = 0x47534943;
+
+	retval = LRMI_int(0x15, &r);
+
+	if (!retval) {
+		printf("Failed!\n");
+		return 0;
+	}
+	if (r.eax == 0x47534943) {
+		printf("BIOS supports GSIC call:\n");
+		printf("\tsignature: %c%c%c%c\n",
+		       (r.eax >> 24) & 0xff,
+		       (r.eax >> 16) & 0xff,
+		       (r.eax >> 8) & 0xff,
+		       (r.eax) & 0xff);
+		printf("\tcommand port = 0x%.4x\n",
+		       r.ebx & 0xffff);
+		printf("\tcommand =      0x%.4x\n",
+		       (r.ebx >> 16) & 0xffff);
+		printf("\tevent port =   0x%.8x\n", r.ecx);
+		printf("\tflags =        0x%.8x\n", r.edx);
+		if (((r.ebx >> 16) & 0xffff) != 0x82) {
+			printf("non-default command value. If speedstep-smi "
+			       "doesn't work out of the box,\nyou may want to "
+			       "try out the default value by passing "
+			       "smi_cmd=0x82 to the module\n ON YOUR OWN "
+			       "RISK.\n");
+		}
+		if ((r.ebx & 0xffff) != 0xb2) {
+			printf("non-default command port. If speedstep-smi "
+			       "doesn't work out of the box,\nyou may want to "
+			       "try out the default value by passing "
+			       "smi_port=0x82 to the module\n ON YOUR OWN "
+			       "RISK.\n");
+		}
+	} else {
+		printf("BIOS DOES NOT support GSIC call.  Dumping registers anyway:\n");
+		printf("eax = 0x%.8x\n", r.eax);
+		printf("ebx = 0x%.8x\n", r.ebx);
+		printf("ecx = 0x%.8x\n", r.ecx);
+		printf("edx = 0x%.8x\n", r.edx);
+		printf("Note also that some BIOS do not support the initial "
+		       "GSIC call, but the newer\nspeedstep-smi driver may "
+		       "work.\nFor this, you need to pass some arguments to "
+		       "the speedstep-smi driver:\n");
+		printf("\tsmi_cmd=0x?? smi_port=0x?? smi_sig=1\n");
+		printf("\nUnfortunately, you have to know what exactly are "
+		       "smi_cmd and smi_port, and this\nis system "
+		       "dependent.\n");
+	}
+	return 1;
+}
diff --git a/tools/power/cpupower/debug/i386/powernow-k8-decode.c b/tools/power/cpupower/debug/i386/powernow-k8-decode.c
new file mode 100644
index 000000000..735dca1e2
--- /dev/null
+++ b/tools/power/cpupower/debug/i386/powernow-k8-decode.c
@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ *  (C) 2004 Bruno Ducrot <ducrot@poupinou.org>
+ *
+ * Based on code found in
+ * linux/arch/i386/kernel/cpu/cpufreq/powernow-k8.c
+ * and originally developed by Paul Devriendt
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <errno.h>
+#include <fcntl.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#define MCPU 32
+
+#define MSR_FIDVID_STATUS	0xc0010042
+
+#define MSR_S_HI_CURRENT_VID	0x0000001f
+#define MSR_S_LO_CURRENT_FID	0x0000003f
+
+static int get_fidvid(uint32_t cpu, uint32_t *fid, uint32_t *vid)
+{
+	int err = 1;
+	uint64_t msr = 0;
+	int fd;
+	char file[20];
+
+	if (cpu > MCPU)
+		goto out;
+
+	sprintf(file, "/dev/cpu/%d/msr", cpu);
+
+	fd = open(file, O_RDONLY);
+	if (fd < 0)
+		goto out;
+	lseek(fd, MSR_FIDVID_STATUS, SEEK_CUR);
+	if (read(fd, &msr, 8) != 8)
+		goto err1;
+
+	*fid = ((uint32_t )(msr & 0xffffffffull)) & MSR_S_LO_CURRENT_FID;
+	*vid = ((uint32_t )(msr>>32 & 0xffffffffull)) & MSR_S_HI_CURRENT_VID;
+	err = 0;
+err1:
+	close(fd);
+out:
+	return err;
+}
+
+
+/* Return a frequency in MHz, given an input fid */
+static uint32_t find_freq_from_fid(uint32_t fid)
+{
+	return 800 + (fid * 100);
+}
+
+/* Return a voltage in miliVolts, given an input vid */
+static uint32_t find_millivolts_from_vid(uint32_t vid)
+{
+	return 1550-vid*25;
+}
+
+int main (int argc, char *argv[])
+{
+	int err;
+	int cpu;
+	uint32_t fid, vid;
+
+	if (argc < 2)
+		cpu = 0;
+	else
+		cpu = strtoul(argv[1], NULL, 0);
+
+	err = get_fidvid(cpu, &fid, &vid);
+
+	if (err) {
+		printf("can't get fid, vid from MSR\n");
+		printf("Possible trouble: you don't run a powernow-k8 capable cpu\n");
+		printf("or you are not root, or the msr driver is not present\n");
+		exit(1);
+	}
+
+	
+	printf("cpu %d currently at %d MHz and %d mV\n",
+			cpu,
+			find_freq_from_fid(fid),
+			find_millivolts_from_vid(vid));
+	
+	return 0;
+}
diff --git a/tools/power/cpupower/debug/kernel/Makefile b/tools/power/cpupower/debug/kernel/Makefile
new file mode 100644
index 000000000..7b5c43684
--- /dev/null
+++ b/tools/power/cpupower/debug/kernel/Makefile
@@ -0,0 +1,23 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-m	:=
+
+KDIR	:= /lib/modules/$(shell uname -r)/build
+KMISC   := /lib/modules/$(shell uname -r)/cpufrequtils/
+
+ifeq ("$(CONFIG_X86_TSC)", "y")
+  obj-m	 += cpufreq-test_tsc.o
+endif
+
+default:
+	$(MAKE) -C $(KDIR) M=$(CURDIR)
+
+clean:
+	- rm -rf *.o *.ko .*.cmd .*.mod.* *.mod.c
+	- rm -rf Module.symvers modules.order
+
+install: default
+	install -d $(KMISC)
+	install -m 644 -c *.ko $(KMISC)
+	/sbin/depmod -a
+
+all:	default
diff --git a/tools/power/cpupower/debug/kernel/cpufreq-test_tsc.c b/tools/power/cpupower/debug/kernel/cpufreq-test_tsc.c
new file mode 100644
index 000000000..e364b170b
--- /dev/null
+++ b/tools/power/cpupower/debug/kernel/cpufreq-test_tsc.c
@@ -0,0 +1,111 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * test module to check whether the TSC-based delay routine continues
+ * to work properly after cpufreq transitions. Needs ACPI to work
+ * properly.
+ *
+ * Based partly on the Power Management Timer (PMTMR) code to be found
+ * in arch/i386/kernel/timers/timer_pm.c on recent 2.6. kernels, especially
+ * code written by John Stultz. The read_pmtmr function was copied verbatim
+ * from that file.
+ *
+ * (C) 2004 Dominik Brodowski
+ *
+ * To use:
+ * 1.) pass clock=tsc to the kernel on your bootloader
+ * 2.) modprobe this module (it'll fail)
+ * 3.) change CPU frequency
+ * 4.) modprobe this module again
+ * 5.) if the third value, "diff_pmtmr", changes between 2. and 4., the
+ *     TSC-based delay routine on the Linux kernel does not correctly
+ *     handle the cpufreq transition. Please report this to
+ *     linux-pm@vger.kernel.org
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/acpi.h>
+#include <asm/io.h>
+
+static int pm_tmr_ioport = 0;
+
+/*helper function to safely read acpi pm timesource*/
+static u32 read_pmtmr(void)
+{
+	u32 v1=0,v2=0,v3=0;
+	/* It has been reported that because of various broken
+	 * chipsets (ICH4, PIIX4 and PIIX4E) where the ACPI PM time
+	 * source is not latched, so you must read it multiple
+	 * times to insure a safe value is read.
+	 */
+	do {
+		v1 = inl(pm_tmr_ioport);
+		v2 = inl(pm_tmr_ioport);
+		v3 = inl(pm_tmr_ioport);
+	} while ((v1 > v2 && v1 < v3) || (v2 > v3 && v2 < v1)
+		 || (v3 > v1 && v3 < v2));
+
+	/* mask the output to 24 bits */
+	return (v2 & 0xFFFFFF);
+}
+
+static int __init cpufreq_test_tsc(void)
+{
+	u32 now, then, diff;
+	u64 now_tsc, then_tsc, diff_tsc;
+	int i;
+
+	/* the following code snipped is copied from arch/x86/kernel/acpi/boot.c
+	   of Linux v2.6.25. */
+
+	/* detect the location of the ACPI PM Timer */
+	if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID) {
+		/* FADT rev. 2 */
+		if (acpi_gbl_FADT.xpm_timer_block.space_id !=
+		    ACPI_ADR_SPACE_SYSTEM_IO)
+			return 0;
+
+		pm_tmr_ioport = acpi_gbl_FADT.xpm_timer_block.address;
+		/*
+		 * "X" fields are optional extensions to the original V1.0
+		 * fields, so we must selectively expand V1.0 fields if the
+		 * corresponding X field is zero.
+	 	 */
+		if (!pm_tmr_ioport)
+			pm_tmr_ioport = acpi_gbl_FADT.pm_timer_block;
+	} else {
+		/* FADT rev. 1 */
+		pm_tmr_ioport = acpi_gbl_FADT.pm_timer_block;
+	}
+
+	printk(KERN_DEBUG "start--> \n");
+	then = read_pmtmr();
+	then_tsc = rdtsc();
+	for (i=0;i<20;i++) {
+		mdelay(100);
+		now = read_pmtmr();
+		now_tsc = rdtsc();
+		diff = (now - then) & 0xFFFFFF;
+		diff_tsc = now_tsc - then_tsc;
+		printk(KERN_DEBUG "t1: %08u t2: %08u diff_pmtmr: %08u diff_tsc: %016llu\n", then, now, diff, diff_tsc);
+		then = now;
+		then_tsc = now_tsc;
+	}
+	printk(KERN_DEBUG "<-- end \n");
+	return -ENODEV;
+}
+
+static void __exit cpufreq_none(void)
+{
+	return;
+}
+
+module_init(cpufreq_test_tsc)
+module_exit(cpufreq_none)
+
+
+MODULE_AUTHOR("Dominik Brodowski");
+MODULE_DESCRIPTION("Verify the TSC cpufreq notifier working correctly -- needs ACPI-enabled system");
+MODULE_LICENSE ("GPL");
diff --git a/tools/power/cpupower/debug/x86_64/Makefile b/tools/power/cpupower/debug/x86_64/Makefile
new file mode 100644
index 000000000..b1b6c4364
--- /dev/null
+++ b/tools/power/cpupower/debug/x86_64/Makefile
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: GPL-2.0
+OUTPUT=./
+ifeq ("$(origin O)", "command line")
+	OUTPUT := $(O)/
+endif
+
+DESTDIR =
+bindir  = /usr/bin
+
+INSTALL = /usr/bin/install
+
+
+default: all
+
+$(OUTPUT)centrino-decode: ../i386/centrino-decode.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) $<
+
+$(OUTPUT)powernow-k8-decode: ../i386/powernow-k8-decode.c
+	$(CC) $(CFLAGS) -o $@ $(LDFLAGS) $<
+
+all: $(OUTPUT)centrino-decode $(OUTPUT)powernow-k8-decode
+
+clean:
+	rm -rf $(OUTPUT)centrino-decode $(OUTPUT)powernow-k8-decode
+
+install:
+	$(INSTALL) -d $(DESTDIR)${bindir}
+	$(INSTALL) $(OUTPUT)centrino-decode $(DESTDIR)${bindir}
+	$(INSTALL) $(OUTPUT)powernow-k8-decode $(DESTDIR)${bindir}
+
+.PHONY: all default clean install