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().
  ...

1 files changed, 800 insertions, 0 deletions

diff --git a/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
new file mode 100644
index 000000000..18f97f43e
--- /dev/null
+++ b/tools/perf/util/intel-pt-decoder/intel-pt-pkt-decoder.c
@@ -0,0 +1,800 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * intel_pt_pkt_decoder.c: Intel Processor Trace support
+ * Copyright (c) 2013-2014, Intel Corporation.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <endian.h>
+#include <byteswap.h>
+#include <linux/compiler.h>
+
+#include "intel-pt-pkt-decoder.h"
+
+#define BIT(n)		(1 << (n))
+
+#define BIT63		((uint64_t)1 << 63)
+
+#if __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
+#define le16_to_cpu bswap_16
+#define le32_to_cpu bswap_32
+#define le64_to_cpu bswap_64
+#define memcpy_le64(d, s, n) do { \
+	memcpy((d), (s), (n));    \
+	*(d) = le64_to_cpu(*(d)); \
+} while (0)
+#else
+#define le16_to_cpu
+#define le32_to_cpu
+#define le64_to_cpu
+#define memcpy_le64 memcpy
+#endif
+
+static const char * const packet_name[] = {
+	[INTEL_PT_BAD]		= "Bad Packet!",
+	[INTEL_PT_PAD]		= "PAD",
+	[INTEL_PT_TNT]		= "TNT",
+	[INTEL_PT_TIP_PGD]	= "TIP.PGD",
+	[INTEL_PT_TIP_PGE]	= "TIP.PGE",
+	[INTEL_PT_TSC]		= "TSC",
+	[INTEL_PT_TMA]		= "TMA",
+	[INTEL_PT_MODE_EXEC]	= "MODE.Exec",
+	[INTEL_PT_MODE_TSX]	= "MODE.TSX",
+	[INTEL_PT_MTC]		= "MTC",
+	[INTEL_PT_TIP]		= "TIP",
+	[INTEL_PT_FUP]		= "FUP",
+	[INTEL_PT_CYC]		= "CYC",
+	[INTEL_PT_VMCS]		= "VMCS",
+	[INTEL_PT_PSB]		= "PSB",
+	[INTEL_PT_PSBEND]	= "PSBEND",
+	[INTEL_PT_CBR]		= "CBR",
+	[INTEL_PT_TRACESTOP]	= "TraceSTOP",
+	[INTEL_PT_PIP]		= "PIP",
+	[INTEL_PT_OVF]		= "OVF",
+	[INTEL_PT_MNT]		= "MNT",
+	[INTEL_PT_PTWRITE]	= "PTWRITE",
+	[INTEL_PT_PTWRITE_IP]	= "PTWRITE",
+	[INTEL_PT_EXSTOP]	= "EXSTOP",
+	[INTEL_PT_EXSTOP_IP]	= "EXSTOP",
+	[INTEL_PT_MWAIT]	= "MWAIT",
+	[INTEL_PT_PWRE]		= "PWRE",
+	[INTEL_PT_PWRX]		= "PWRX",
+	[INTEL_PT_BBP]		= "BBP",
+	[INTEL_PT_BIP]		= "BIP",
+	[INTEL_PT_BEP]		= "BEP",
+	[INTEL_PT_BEP_IP]	= "BEP",
+	[INTEL_PT_CFE]		= "CFE",
+	[INTEL_PT_CFE_IP]	= "CFE",
+	[INTEL_PT_EVD]		= "EVD",
+};
+
+const char *intel_pt_pkt_name(enum intel_pt_pkt_type type)
+{
+	return packet_name[type];
+}
+
+static int intel_pt_get_long_tnt(const unsigned char *buf, size_t len,
+				 struct intel_pt_pkt *packet)
+{
+	uint64_t payload;
+	int count;
+
+	if (len < 8)
+		return INTEL_PT_NEED_MORE_BYTES;
+
+	payload = le64_to_cpu(*(uint64_t *)buf);
+
+	for (count = 47; count; count--) {
+		if (payload & BIT63)
+			break;
+		payload <<= 1;
+	}
+
+	packet->type = INTEL_PT_TNT;
+	packet->count = count;
+	packet->payload = payload << 1;
+	return 8;
+}
+
+static int intel_pt_get_pip(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	uint64_t payload = 0;
+
+	if (len < 8)
+		return INTEL_PT_NEED_MORE_BYTES;
+
+	packet->type = INTEL_PT_PIP;
+	memcpy_le64(&payload, buf + 2, 6);
+	packet->payload = payload;
+
+	return 8;
+}
+
+static int intel_pt_get_tracestop(struct intel_pt_pkt *packet)
+{
+	packet->type = INTEL_PT_TRACESTOP;
+	return 2;
+}
+
+static int intel_pt_get_cbr(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	if (len < 4)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_CBR;
+	packet->payload = le16_to_cpu(*(uint16_t *)(buf + 2));
+	return 4;
+}
+
+static int intel_pt_get_vmcs(const unsigned char *buf, size_t len,
+			     struct intel_pt_pkt *packet)
+{
+	unsigned int count = (52 - 5) >> 3;
+
+	if (count < 1 || count > 7)
+		return INTEL_PT_BAD_PACKET;
+
+	if (len < count + 2)
+		return INTEL_PT_NEED_MORE_BYTES;
+
+	packet->type = INTEL_PT_VMCS;
+	packet->count = count;
+	memcpy_le64(&packet->payload, buf + 2, count);
+
+	return count + 2;
+}
+
+static int intel_pt_get_ovf(struct intel_pt_pkt *packet)
+{
+	packet->type = INTEL_PT_OVF;
+	return 2;
+}
+
+static int intel_pt_get_psb(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	int i;
+
+	if (len < 16)
+		return INTEL_PT_NEED_MORE_BYTES;
+
+	for (i = 2; i < 16; i += 2) {
+		if (buf[i] != 2 || buf[i + 1] != 0x82)
+			return INTEL_PT_BAD_PACKET;
+	}
+
+	packet->type = INTEL_PT_PSB;
+	return 16;
+}
+
+static int intel_pt_get_psbend(struct intel_pt_pkt *packet)
+{
+	packet->type = INTEL_PT_PSBEND;
+	return 2;
+}
+
+static int intel_pt_get_tma(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	if (len < 7)
+		return INTEL_PT_NEED_MORE_BYTES;
+
+	packet->type = INTEL_PT_TMA;
+	packet->payload = buf[2] | (buf[3] << 8);
+	packet->count = buf[5] | ((buf[6] & BIT(0)) << 8);
+	return 7;
+}
+
+static int intel_pt_get_pad(struct intel_pt_pkt *packet)
+{
+	packet->type = INTEL_PT_PAD;
+	return 1;
+}
+
+static int intel_pt_get_mnt(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	if (len < 11)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_MNT;
+	memcpy_le64(&packet->payload, buf + 3, 8);
+	return 11;
+}
+
+static int intel_pt_get_3byte(const unsigned char *buf, size_t len,
+			      struct intel_pt_pkt *packet)
+{
+	if (len < 3)
+		return INTEL_PT_NEED_MORE_BYTES;
+
+	switch (buf[2]) {
+	case 0x88: /* MNT */
+		return intel_pt_get_mnt(buf, len, packet);
+	default:
+		return INTEL_PT_BAD_PACKET;
+	}
+}
+
+static int intel_pt_get_ptwrite(const unsigned char *buf, size_t len,
+				struct intel_pt_pkt *packet)
+{
+	packet->count = (buf[1] >> 5) & 0x3;
+	packet->type = buf[1] & BIT(7) ? INTEL_PT_PTWRITE_IP :
+					 INTEL_PT_PTWRITE;
+
+	switch (packet->count) {
+	case 0:
+		if (len < 6)
+			return INTEL_PT_NEED_MORE_BYTES;
+		packet->payload = le32_to_cpu(*(uint32_t *)(buf + 2));
+		return 6;
+	case 1:
+		if (len < 10)
+			return INTEL_PT_NEED_MORE_BYTES;
+		packet->payload = le64_to_cpu(*(uint64_t *)(buf + 2));
+		return 10;
+	default:
+		return INTEL_PT_BAD_PACKET;
+	}
+}
+
+static int intel_pt_get_exstop(struct intel_pt_pkt *packet)
+{
+	packet->type = INTEL_PT_EXSTOP;
+	return 2;
+}
+
+static int intel_pt_get_exstop_ip(struct intel_pt_pkt *packet)
+{
+	packet->type = INTEL_PT_EXSTOP_IP;
+	return 2;
+}
+
+static int intel_pt_get_mwait(const unsigned char *buf, size_t len,
+			      struct intel_pt_pkt *packet)
+{
+	if (len < 10)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_MWAIT;
+	packet->payload = le64_to_cpu(*(uint64_t *)(buf + 2));
+	return 10;
+}
+
+static int intel_pt_get_pwre(const unsigned char *buf, size_t len,
+			     struct intel_pt_pkt *packet)
+{
+	if (len < 4)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_PWRE;
+	memcpy_le64(&packet->payload, buf + 2, 2);
+	return 4;
+}
+
+static int intel_pt_get_pwrx(const unsigned char *buf, size_t len,
+			     struct intel_pt_pkt *packet)
+{
+	if (len < 7)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_PWRX;
+	memcpy_le64(&packet->payload, buf + 2, 5);
+	return 7;
+}
+
+static int intel_pt_get_bbp(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	if (len < 3)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_BBP;
+	packet->count = buf[2] >> 7;
+	packet->payload = buf[2] & 0x1f;
+	return 3;
+}
+
+static int intel_pt_get_bip_4(const unsigned char *buf, size_t len,
+			      struct intel_pt_pkt *packet)
+{
+	if (len < 5)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_BIP;
+	packet->count = buf[0] >> 3;
+	memcpy_le64(&packet->payload, buf + 1, 4);
+	return 5;
+}
+
+static int intel_pt_get_bip_8(const unsigned char *buf, size_t len,
+			      struct intel_pt_pkt *packet)
+{
+	if (len < 9)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_BIP;
+	packet->count = buf[0] >> 3;
+	memcpy_le64(&packet->payload, buf + 1, 8);
+	return 9;
+}
+
+static int intel_pt_get_bep(size_t len, struct intel_pt_pkt *packet)
+{
+	if (len < 2)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_BEP;
+	return 2;
+}
+
+static int intel_pt_get_bep_ip(size_t len, struct intel_pt_pkt *packet)
+{
+	if (len < 2)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_BEP_IP;
+	return 2;
+}
+
+static int intel_pt_get_cfe(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	if (len < 4)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = buf[2] & 0x80 ? INTEL_PT_CFE_IP : INTEL_PT_CFE;
+	packet->count = buf[2] & 0x1f;
+	packet->payload = buf[3];
+	return 4;
+}
+
+static int intel_pt_get_evd(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	if (len < 11)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_EVD;
+	packet->count = buf[2] & 0x3f;
+	packet->payload = buf[3];
+	memcpy_le64(&packet->payload, buf + 3, 8);
+	return 11;
+}
+
+static int intel_pt_get_ext(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	if (len < 2)
+		return INTEL_PT_NEED_MORE_BYTES;
+
+	if ((buf[1] & 0x1f) == 0x12)
+		return intel_pt_get_ptwrite(buf, len, packet);
+
+	switch (buf[1]) {
+	case 0xa3: /* Long TNT */
+		return intel_pt_get_long_tnt(buf, len, packet);
+	case 0x43: /* PIP */
+		return intel_pt_get_pip(buf, len, packet);
+	case 0x83: /* TraceStop */
+		return intel_pt_get_tracestop(packet);
+	case 0x03: /* CBR */
+		return intel_pt_get_cbr(buf, len, packet);
+	case 0xc8: /* VMCS */
+		return intel_pt_get_vmcs(buf, len, packet);
+	case 0xf3: /* OVF */
+		return intel_pt_get_ovf(packet);
+	case 0x82: /* PSB */
+		return intel_pt_get_psb(buf, len, packet);
+	case 0x23: /* PSBEND */
+		return intel_pt_get_psbend(packet);
+	case 0x73: /* TMA */
+		return intel_pt_get_tma(buf, len, packet);
+	case 0xC3: /* 3-byte header */
+		return intel_pt_get_3byte(buf, len, packet);
+	case 0x62: /* EXSTOP no IP */
+		return intel_pt_get_exstop(packet);
+	case 0xE2: /* EXSTOP with IP */
+		return intel_pt_get_exstop_ip(packet);
+	case 0xC2: /* MWAIT */
+		return intel_pt_get_mwait(buf, len, packet);
+	case 0x22: /* PWRE */
+		return intel_pt_get_pwre(buf, len, packet);
+	case 0xA2: /* PWRX */
+		return intel_pt_get_pwrx(buf, len, packet);
+	case 0x63: /* BBP */
+		return intel_pt_get_bbp(buf, len, packet);
+	case 0x33: /* BEP no IP */
+		return intel_pt_get_bep(len, packet);
+	case 0xb3: /* BEP with IP */
+		return intel_pt_get_bep_ip(len, packet);
+	case 0x13: /* CFE */
+		return intel_pt_get_cfe(buf, len, packet);
+	case 0x53: /* EVD */
+		return intel_pt_get_evd(buf, len, packet);
+	default:
+		return INTEL_PT_BAD_PACKET;
+	}
+}
+
+static int intel_pt_get_short_tnt(unsigned int byte,
+				  struct intel_pt_pkt *packet)
+{
+	int count;
+
+	for (count = 6; count; count--) {
+		if (byte & BIT(7))
+			break;
+		byte <<= 1;
+	}
+
+	packet->type = INTEL_PT_TNT;
+	packet->count = count;
+	packet->payload = (uint64_t)byte << 57;
+
+	return 1;
+}
+
+static int intel_pt_get_cyc(unsigned int byte, const unsigned char *buf,
+			    size_t len, struct intel_pt_pkt *packet)
+{
+	unsigned int offs = 1, shift;
+	uint64_t payload = byte >> 3;
+
+	byte >>= 2;
+	len -= 1;
+	for (shift = 5; byte & 1; shift += 7) {
+		if (offs > 9)
+			return INTEL_PT_BAD_PACKET;
+		if (len < offs)
+			return INTEL_PT_NEED_MORE_BYTES;
+		byte = buf[offs++];
+		payload |= ((uint64_t)byte >> 1) << shift;
+	}
+
+	packet->type = INTEL_PT_CYC;
+	packet->payload = payload;
+	return offs;
+}
+
+static int intel_pt_get_ip(enum intel_pt_pkt_type type, unsigned int byte,
+			   const unsigned char *buf, size_t len,
+			   struct intel_pt_pkt *packet)
+{
+	int ip_len;
+
+	packet->count = byte >> 5;
+
+	switch (packet->count) {
+	case 0:
+		ip_len = 0;
+		break;
+	case 1:
+		if (len < 3)
+			return INTEL_PT_NEED_MORE_BYTES;
+		ip_len = 2;
+		packet->payload = le16_to_cpu(*(uint16_t *)(buf + 1));
+		break;
+	case 2:
+		if (len < 5)
+			return INTEL_PT_NEED_MORE_BYTES;
+		ip_len = 4;
+		packet->payload = le32_to_cpu(*(uint32_t *)(buf + 1));
+		break;
+	case 3:
+	case 4:
+		if (len < 7)
+			return INTEL_PT_NEED_MORE_BYTES;
+		ip_len = 6;
+		memcpy_le64(&packet->payload, buf + 1, 6);
+		break;
+	case 6:
+		if (len < 9)
+			return INTEL_PT_NEED_MORE_BYTES;
+		ip_len = 8;
+		packet->payload = le64_to_cpu(*(uint64_t *)(buf + 1));
+		break;
+	default:
+		return INTEL_PT_BAD_PACKET;
+	}
+
+	packet->type = type;
+
+	return ip_len + 1;
+}
+
+static int intel_pt_get_mode(const unsigned char *buf, size_t len,
+			     struct intel_pt_pkt *packet)
+{
+	if (len < 2)
+		return INTEL_PT_NEED_MORE_BYTES;
+
+	switch (buf[1] >> 5) {
+	case 0:
+		packet->type = INTEL_PT_MODE_EXEC;
+		packet->count = buf[1];
+		switch (buf[1] & 3) {
+		case 0:
+			packet->payload = 16;
+			break;
+		case 1:
+			packet->payload = 64;
+			break;
+		case 2:
+			packet->payload = 32;
+			break;
+		default:
+			return INTEL_PT_BAD_PACKET;
+		}
+		break;
+	case 1:
+		packet->type = INTEL_PT_MODE_TSX;
+		if ((buf[1] & 3) == 3)
+			return INTEL_PT_BAD_PACKET;
+		packet->payload = buf[1] & 3;
+		break;
+	default:
+		return INTEL_PT_BAD_PACKET;
+	}
+
+	return 2;
+}
+
+static int intel_pt_get_tsc(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	if (len < 8)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_TSC;
+	memcpy_le64(&packet->payload, buf + 1, 7);
+	return 8;
+}
+
+static int intel_pt_get_mtc(const unsigned char *buf, size_t len,
+			    struct intel_pt_pkt *packet)
+{
+	if (len < 2)
+		return INTEL_PT_NEED_MORE_BYTES;
+	packet->type = INTEL_PT_MTC;
+	packet->payload = buf[1];
+	return 2;
+}
+
+static int intel_pt_do_get_packet(const unsigned char *buf, size_t len,
+				  struct intel_pt_pkt *packet,
+				  enum intel_pt_pkt_ctx ctx)
+{
+	unsigned int byte;
+
+	memset(packet, 0, sizeof(struct intel_pt_pkt));
+
+	if (!len)
+		return INTEL_PT_NEED_MORE_BYTES;
+
+	byte = buf[0];
+
+	switch (ctx) {
+	case INTEL_PT_NO_CTX:
+		break;
+	case INTEL_PT_BLK_4_CTX:
+		if ((byte & 0x7) == 4)
+			return intel_pt_get_bip_4(buf, len, packet);
+		break;
+	case INTEL_PT_BLK_8_CTX:
+		if ((byte & 0x7) == 4)
+			return intel_pt_get_bip_8(buf, len, packet);
+		break;
+	default:
+		break;
+	}
+
+	if (!(byte & BIT(0))) {
+		if (byte == 0)
+			return intel_pt_get_pad(packet);
+		if (byte == 2)
+			return intel_pt_get_ext(buf, len, packet);
+		return intel_pt_get_short_tnt(byte, packet);
+	}
+
+	if ((byte & 2))
+		return intel_pt_get_cyc(byte, buf, len, packet);
+
+	switch (byte & 0x1f) {
+	case 0x0D:
+		return intel_pt_get_ip(INTEL_PT_TIP, byte, buf, len, packet);
+	case 0x11:
+		return intel_pt_get_ip(INTEL_PT_TIP_PGE, byte, buf, len,
+				       packet);
+	case 0x01:
+		return intel_pt_get_ip(INTEL_PT_TIP_PGD, byte, buf, len,
+				       packet);
+	case 0x1D:
+		return intel_pt_get_ip(INTEL_PT_FUP, byte, buf, len, packet);
+	case 0x19:
+		switch (byte) {
+		case 0x99:
+			return intel_pt_get_mode(buf, len, packet);
+		case 0x19:
+			return intel_pt_get_tsc(buf, len, packet);
+		case 0x59:
+			return intel_pt_get_mtc(buf, len, packet);
+		default:
+			return INTEL_PT_BAD_PACKET;
+		}
+	default:
+		return INTEL_PT_BAD_PACKET;
+	}
+}
+
+void intel_pt_upd_pkt_ctx(const struct intel_pt_pkt *packet,
+			  enum intel_pt_pkt_ctx *ctx)
+{
+	switch (packet->type) {
+	case INTEL_PT_BAD:
+	case INTEL_PT_PAD:
+	case INTEL_PT_TSC:
+	case INTEL_PT_TMA:
+	case INTEL_PT_MTC:
+	case INTEL_PT_FUP:
+	case INTEL_PT_CYC:
+	case INTEL_PT_CBR:
+	case INTEL_PT_MNT:
+	case INTEL_PT_EXSTOP:
+	case INTEL_PT_EXSTOP_IP:
+	case INTEL_PT_PWRE:
+	case INTEL_PT_PWRX:
+	case INTEL_PT_BIP:
+		break;
+	case INTEL_PT_TNT:
+	case INTEL_PT_TIP:
+	case INTEL_PT_TIP_PGD:
+	case INTEL_PT_TIP_PGE:
+	case INTEL_PT_MODE_EXEC:
+	case INTEL_PT_MODE_TSX:
+	case INTEL_PT_PIP:
+	case INTEL_PT_OVF:
+	case INTEL_PT_VMCS:
+	case INTEL_PT_TRACESTOP:
+	case INTEL_PT_PSB:
+	case INTEL_PT_PSBEND:
+	case INTEL_PT_PTWRITE:
+	case INTEL_PT_PTWRITE_IP:
+	case INTEL_PT_MWAIT:
+	case INTEL_PT_BEP:
+	case INTEL_PT_BEP_IP:
+	case INTEL_PT_CFE:
+	case INTEL_PT_CFE_IP:
+	case INTEL_PT_EVD:
+		*ctx = INTEL_PT_NO_CTX;
+		break;
+	case INTEL_PT_BBP:
+		if (packet->count)
+			*ctx = INTEL_PT_BLK_4_CTX;
+		else
+			*ctx = INTEL_PT_BLK_8_CTX;
+		break;
+	default:
+		break;
+	}
+}
+
+int intel_pt_get_packet(const unsigned char *buf, size_t len,
+			struct intel_pt_pkt *packet, enum intel_pt_pkt_ctx *ctx)
+{
+	int ret;
+
+	ret = intel_pt_do_get_packet(buf, len, packet, *ctx);
+	if (ret > 0) {
+		while (ret < 8 && len > (size_t)ret && !buf[ret])
+			ret += 1;
+		intel_pt_upd_pkt_ctx(packet, ctx);
+	}
+	return ret;
+}
+
+int intel_pt_pkt_desc(const struct intel_pt_pkt *packet, char *buf,
+		      size_t buf_len)
+{
+	int ret, i, nr;
+	unsigned long long payload = packet->payload;
+	const char *name = intel_pt_pkt_name(packet->type);
+
+	switch (packet->type) {
+	case INTEL_PT_BAD:
+	case INTEL_PT_PAD:
+	case INTEL_PT_PSB:
+	case INTEL_PT_PSBEND:
+	case INTEL_PT_TRACESTOP:
+	case INTEL_PT_OVF:
+		return snprintf(buf, buf_len, "%s", name);
+	case INTEL_PT_TNT: {
+		size_t blen = buf_len;
+
+		ret = snprintf(buf, blen, "%s ", name);
+		if (ret < 0)
+			return ret;
+		buf += ret;
+		blen -= ret;
+		for (i = 0; i < packet->count; i++) {
+			if (payload & BIT63)
+				ret = snprintf(buf, blen, "T");
+			else
+				ret = snprintf(buf, blen, "N");
+			if (ret < 0)
+				return ret;
+			buf += ret;
+			blen -= ret;
+			payload <<= 1;
+		}
+		ret = snprintf(buf, blen, " (%d)", packet->count);
+		if (ret < 0)
+			return ret;
+		blen -= ret;
+		return buf_len - blen;
+	}
+	case INTEL_PT_TIP_PGD:
+	case INTEL_PT_TIP_PGE:
+	case INTEL_PT_TIP:
+	case INTEL_PT_FUP:
+		if (!(packet->count))
+			return snprintf(buf, buf_len, "%s no ip", name);
+		__fallthrough;
+	case INTEL_PT_CYC:
+	case INTEL_PT_VMCS:
+	case INTEL_PT_MTC:
+	case INTEL_PT_MNT:
+	case INTEL_PT_CBR:
+	case INTEL_PT_TSC:
+		return snprintf(buf, buf_len, "%s 0x%llx", name, payload);
+	case INTEL_PT_TMA:
+		return snprintf(buf, buf_len, "%s CTC 0x%x FC 0x%x", name,
+				(unsigned)payload, packet->count);
+	case INTEL_PT_MODE_EXEC:
+		return snprintf(buf, buf_len, "%s IF:%d %lld",
+				name, !!(packet->count & 4), payload);
+	case INTEL_PT_MODE_TSX:
+		return snprintf(buf, buf_len, "%s TXAbort:%u InTX:%u",
+				name, (unsigned)(payload >> 1) & 1,
+				(unsigned)payload & 1);
+	case INTEL_PT_PIP:
+		nr = packet->payload & INTEL_PT_VMX_NR_FLAG ? 1 : 0;
+		payload &= ~INTEL_PT_VMX_NR_FLAG;
+		ret = snprintf(buf, buf_len, "%s 0x%llx (NR=%d)",
+			       name, payload >> 1, nr);
+		return ret;
+	case INTEL_PT_PTWRITE:
+		return snprintf(buf, buf_len, "%s 0x%llx IP:0", name, payload);
+	case INTEL_PT_PTWRITE_IP:
+		return snprintf(buf, buf_len, "%s 0x%llx IP:1", name, payload);
+	case INTEL_PT_BEP:
+	case INTEL_PT_EXSTOP:
+		return snprintf(buf, buf_len, "%s IP:0", name);
+	case INTEL_PT_BEP_IP:
+	case INTEL_PT_EXSTOP_IP:
+		return snprintf(buf, buf_len, "%s IP:1", name);
+	case INTEL_PT_MWAIT:
+		return snprintf(buf, buf_len, "%s 0x%llx Hints 0x%x Extensions 0x%x",
+				name, payload, (unsigned int)(payload & 0xff),
+				(unsigned int)((payload >> 32) & 0x3));
+	case INTEL_PT_PWRE:
+		return snprintf(buf, buf_len, "%s 0x%llx HW:%u CState:%u Sub-CState:%u",
+				name, payload, !!(payload & 0x80),
+				(unsigned int)((payload >> 12) & 0xf),
+				(unsigned int)((payload >> 8) & 0xf));
+	case INTEL_PT_PWRX:
+		return snprintf(buf, buf_len, "%s 0x%llx Last CState:%u Deepest CState:%u Wake Reason 0x%x",
+				name, payload,
+				(unsigned int)((payload >> 4) & 0xf),
+				(unsigned int)(payload & 0xf),
+				(unsigned int)((payload >> 8) & 0xf));
+	case INTEL_PT_BBP:
+		return snprintf(buf, buf_len, "%s SZ %s-byte Type 0x%llx",
+				name, packet->count ? "4" : "8", payload);
+	case INTEL_PT_BIP:
+		return snprintf(buf, buf_len, "%s ID 0x%02x Value 0x%llx",
+				name, packet->count, payload);
+	case INTEL_PT_CFE:
+	case INTEL_PT_CFE_IP:
+		return snprintf(buf, buf_len, "%s IP:%d Type 0x%02x Vector 0x%llx",
+				name, packet->type == INTEL_PT_CFE_IP, packet->count, payload);
+	case INTEL_PT_EVD:
+		return snprintf(buf, buf_len, "%s Type 0x%02x Payload 0x%llx",
+				name, packet->count, payload);
+	default:
+		break;
+	}
+	return snprintf(buf, buf_len, "%s 0x%llx (%d)",
+			name, payload, packet->count);
+}