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, 695 insertions, 0 deletions

diff --git a/arch/s390/kernel/perf_pai_crypto.c b/arch/s390/kernel/perf_pai_crypto.c
new file mode 100644
index 000000000..a7b339c4f
--- /dev/null
+++ b/arch/s390/kernel/perf_pai_crypto.c
@@ -0,0 +1,695 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Performance event support - Processor Activity Instrumentation Facility
+ *
+ *  Copyright IBM Corp. 2022
+ *  Author(s): Thomas Richter <tmricht@linux.ibm.com>
+ */
+#define KMSG_COMPONENT	"pai_crypto"
+#define pr_fmt(fmt)	KMSG_COMPONENT ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/kernel_stat.h>
+#include <linux/percpu.h>
+#include <linux/notifier.h>
+#include <linux/init.h>
+#include <linux/export.h>
+#include <linux/io.h>
+#include <linux/perf_event.h>
+
+#include <asm/ctl_reg.h>
+#include <asm/pai.h>
+#include <asm/debug.h>
+
+static debug_info_t *cfm_dbg;
+static unsigned int paicrypt_cnt;	/* Size of the mapped counter sets */
+					/* extracted with QPACI instruction */
+
+DEFINE_STATIC_KEY_FALSE(pai_key);
+
+struct pai_userdata {
+	u16 num;
+	u64 value;
+} __packed;
+
+struct paicrypt_map {
+	unsigned long *page;		/* Page for CPU to store counters */
+	struct pai_userdata *save;	/* Page to store no-zero counters */
+	unsigned int active_events;	/* # of PAI crypto users */
+	unsigned int refcnt;		/* Reference count mapped buffers */
+	enum paievt_mode mode;		/* Type of event */
+	struct perf_event *event;	/* Perf event for sampling */
+};
+
+static DEFINE_PER_CPU(struct paicrypt_map, paicrypt_map);
+
+/* Release the PMU if event is the last perf event */
+static DEFINE_MUTEX(pai_reserve_mutex);
+
+/* Adjust usage counters and remove allocated memory when all users are
+ * gone.
+ */
+static void paicrypt_event_destroy(struct perf_event *event)
+{
+	struct paicrypt_map *cpump = per_cpu_ptr(&paicrypt_map, event->cpu);
+
+	cpump->event = NULL;
+	static_branch_dec(&pai_key);
+	mutex_lock(&pai_reserve_mutex);
+	debug_sprintf_event(cfm_dbg, 5, "%s event %#llx cpu %d users %d"
+			    " mode %d refcnt %d\n", __func__,
+			    event->attr.config, event->cpu,
+			    cpump->active_events, cpump->mode, cpump->refcnt);
+	if (!--cpump->refcnt) {
+		debug_sprintf_event(cfm_dbg, 4, "%s page %#lx save %p\n",
+				    __func__, (unsigned long)cpump->page,
+				    cpump->save);
+		free_page((unsigned long)cpump->page);
+		cpump->page = NULL;
+		kvfree(cpump->save);
+		cpump->save = NULL;
+		cpump->mode = PAI_MODE_NONE;
+	}
+	mutex_unlock(&pai_reserve_mutex);
+}
+
+static u64 paicrypt_getctr(struct paicrypt_map *cpump, int nr, bool kernel)
+{
+	if (kernel)
+		nr += PAI_CRYPTO_MAXCTR;
+	return cpump->page[nr];
+}
+
+/* Read the counter values. Return value from location in CMP. For event
+ * CRYPTO_ALL sum up all events.
+ */
+static u64 paicrypt_getdata(struct perf_event *event, bool kernel)
+{
+	struct paicrypt_map *cpump = this_cpu_ptr(&paicrypt_map);
+	u64 sum = 0;
+	int i;
+
+	if (event->attr.config != PAI_CRYPTO_BASE) {
+		return paicrypt_getctr(cpump,
+				       event->attr.config - PAI_CRYPTO_BASE,
+				       kernel);
+	}
+
+	for (i = 1; i <= paicrypt_cnt; i++) {
+		u64 val = paicrypt_getctr(cpump, i, kernel);
+
+		if (!val)
+			continue;
+		sum += val;
+	}
+	return sum;
+}
+
+static u64 paicrypt_getall(struct perf_event *event)
+{
+	u64 sum = 0;
+
+	if (!event->attr.exclude_kernel)
+		sum += paicrypt_getdata(event, true);
+	if (!event->attr.exclude_user)
+		sum += paicrypt_getdata(event, false);
+
+	return sum;
+}
+
+/* Used to avoid races in checking concurrent access of counting and
+ * sampling for crypto events
+ *
+ * Only one instance of event pai_crypto/CRYPTO_ALL/ for sampling is
+ * allowed and when this event is running, no counting event is allowed.
+ * Several counting events are allowed in parallel, but no sampling event
+ * is allowed while one (or more) counting events are running.
+ *
+ * This function is called in process context and it is save to block.
+ * When the event initialization functions fails, no other call back will
+ * be invoked.
+ *
+ * Allocate the memory for the event.
+ */
+static int paicrypt_busy(struct perf_event_attr *a, struct paicrypt_map *cpump)
+{
+	int rc = 0;
+
+	mutex_lock(&pai_reserve_mutex);
+	if (a->sample_period) {		/* Sampling requested */
+		if (cpump->mode != PAI_MODE_NONE)
+			rc = -EBUSY;	/* ... sampling/counting active */
+	} else {			/* Counting requested */
+		if (cpump->mode == PAI_MODE_SAMPLING)
+			rc = -EBUSY;	/* ... and sampling active */
+	}
+	if (rc)
+		goto unlock;
+
+	/* Allocate memory for counter page and counter extraction.
+	 * Only the first counting event has to allocate a page.
+	 */
+	if (cpump->page)
+		goto unlock;
+
+	rc = -ENOMEM;
+	cpump->page = (unsigned long *)get_zeroed_page(GFP_KERNEL);
+	if (!cpump->page)
+		goto unlock;
+	cpump->save = kvmalloc_array(paicrypt_cnt + 1,
+				     sizeof(struct pai_userdata), GFP_KERNEL);
+	if (!cpump->save) {
+		free_page((unsigned long)cpump->page);
+		cpump->page = NULL;
+		goto unlock;
+	}
+	rc = 0;
+
+unlock:
+	/* If rc is non-zero, do not set mode and reference count */
+	if (!rc) {
+		cpump->refcnt++;
+		cpump->mode = a->sample_period ? PAI_MODE_SAMPLING
+					       : PAI_MODE_COUNTING;
+	}
+	debug_sprintf_event(cfm_dbg, 5, "%s sample_period %#llx users %d"
+			    " mode %d refcnt %d page %#lx save %p rc %d\n",
+			    __func__, a->sample_period, cpump->active_events,
+			    cpump->mode, cpump->refcnt,
+			    (unsigned long)cpump->page, cpump->save, rc);
+	mutex_unlock(&pai_reserve_mutex);
+	return rc;
+}
+
+/* Might be called on different CPU than the one the event is intended for. */
+static int paicrypt_event_init(struct perf_event *event)
+{
+	struct perf_event_attr *a = &event->attr;
+	struct paicrypt_map *cpump;
+	int rc;
+
+	/* PAI crypto PMU registered as PERF_TYPE_RAW, check event type */
+	if (a->type != PERF_TYPE_RAW && event->pmu->type != a->type)
+		return -ENOENT;
+	/* PAI crypto event must be in valid range */
+	if (a->config < PAI_CRYPTO_BASE ||
+	    a->config > PAI_CRYPTO_BASE + paicrypt_cnt)
+		return -EINVAL;
+	/* Allow only CPU wide operation, no process context for now. */
+	if (event->hw.target || event->cpu == -1)
+		return -ENOENT;
+	/* Allow only CRYPTO_ALL for sampling. */
+	if (a->sample_period && a->config != PAI_CRYPTO_BASE)
+		return -EINVAL;
+
+	cpump = per_cpu_ptr(&paicrypt_map, event->cpu);
+	rc = paicrypt_busy(a, cpump);
+	if (rc)
+		return rc;
+
+	/* Event initialization sets last_tag to 0. When later on the events
+	 * are deleted and re-added, do not reset the event count value to zero.
+	 * Events are added, deleted and re-added when 2 or more events
+	 * are active at the same time.
+	 */
+	event->hw.last_tag = 0;
+	cpump->event = event;
+	event->destroy = paicrypt_event_destroy;
+
+	if (a->sample_period) {
+		a->sample_period = 1;
+		a->freq = 0;
+		/* Register for paicrypt_sched_task() to be called */
+		event->attach_state |= PERF_ATTACH_SCHED_CB;
+		/* Add raw data which contain the memory mapped counters */
+		a->sample_type |= PERF_SAMPLE_RAW;
+		/* Turn off inheritance */
+		a->inherit = 0;
+	}
+
+	static_branch_inc(&pai_key);
+	return 0;
+}
+
+static void paicrypt_read(struct perf_event *event)
+{
+	u64 prev, new, delta;
+
+	prev = local64_read(&event->hw.prev_count);
+	new = paicrypt_getall(event);
+	local64_set(&event->hw.prev_count, new);
+	delta = (prev <= new) ? new - prev
+			      : (-1ULL - prev) + new + 1;	 /* overflow */
+	local64_add(delta, &event->count);
+}
+
+static void paicrypt_start(struct perf_event *event, int flags)
+{
+	u64 sum;
+
+	if (!event->hw.last_tag) {
+		event->hw.last_tag = 1;
+		sum = paicrypt_getall(event);		/* Get current value */
+		local64_set(&event->count, 0);
+		local64_set(&event->hw.prev_count, sum);
+	}
+}
+
+static int paicrypt_add(struct perf_event *event, int flags)
+{
+	struct paicrypt_map *cpump = this_cpu_ptr(&paicrypt_map);
+	unsigned long ccd;
+
+	if (++cpump->active_events == 1) {
+		ccd = virt_to_phys(cpump->page) | PAI_CRYPTO_KERNEL_OFFSET;
+		WRITE_ONCE(S390_lowcore.ccd, ccd);
+		__ctl_set_bit(0, 50);
+	}
+	cpump->event = event;
+	if (flags & PERF_EF_START && !event->attr.sample_period) {
+		/* Only counting needs initial counter value */
+		paicrypt_start(event, PERF_EF_RELOAD);
+	}
+	event->hw.state = 0;
+	if (event->attr.sample_period)
+		perf_sched_cb_inc(event->pmu);
+	return 0;
+}
+
+static void paicrypt_stop(struct perf_event *event, int flags)
+{
+	paicrypt_read(event);
+	event->hw.state = PERF_HES_STOPPED;
+}
+
+static void paicrypt_del(struct perf_event *event, int flags)
+{
+	struct paicrypt_map *cpump = this_cpu_ptr(&paicrypt_map);
+
+	if (event->attr.sample_period)
+		perf_sched_cb_dec(event->pmu);
+	if (!event->attr.sample_period)
+		/* Only counting needs to read counter */
+		paicrypt_stop(event, PERF_EF_UPDATE);
+	if (--cpump->active_events == 0) {
+		__ctl_clear_bit(0, 50);
+		WRITE_ONCE(S390_lowcore.ccd, 0);
+	}
+}
+
+/* Create raw data and save it in buffer. Returns number of bytes copied.
+ * Saves only positive counter entries of the form
+ * 2 bytes: Number of counter
+ * 8 bytes: Value of counter
+ */
+static size_t paicrypt_copy(struct pai_userdata *userdata,
+			    struct paicrypt_map *cpump,
+			    bool exclude_user, bool exclude_kernel)
+{
+	int i, outidx = 0;
+
+	for (i = 1; i <= paicrypt_cnt; i++) {
+		u64 val = 0;
+
+		if (!exclude_kernel)
+			val += paicrypt_getctr(cpump, i, true);
+		if (!exclude_user)
+			val += paicrypt_getctr(cpump, i, false);
+		if (val) {
+			userdata[outidx].num = i;
+			userdata[outidx].value = val;
+			outidx++;
+		}
+	}
+	return outidx * sizeof(struct pai_userdata);
+}
+
+static int paicrypt_push_sample(void)
+{
+	struct paicrypt_map *cpump = this_cpu_ptr(&paicrypt_map);
+	struct perf_event *event = cpump->event;
+	struct perf_sample_data data;
+	struct perf_raw_record raw;
+	struct pt_regs regs;
+	size_t rawsize;
+	int overflow;
+
+	if (!cpump->event)		/* No event active */
+		return 0;
+	rawsize = paicrypt_copy(cpump->save, cpump,
+				cpump->event->attr.exclude_user,
+				cpump->event->attr.exclude_kernel);
+	if (!rawsize)			/* No incremented counters */
+		return 0;
+
+	/* Setup perf sample */
+	memset(&regs, 0, sizeof(regs));
+	memset(&raw, 0, sizeof(raw));
+	memset(&data, 0, sizeof(data));
+	perf_sample_data_init(&data, 0, event->hw.last_period);
+	if (event->attr.sample_type & PERF_SAMPLE_TID) {
+		data.tid_entry.pid = task_tgid_nr(current);
+		data.tid_entry.tid = task_pid_nr(current);
+	}
+	if (event->attr.sample_type & PERF_SAMPLE_TIME)
+		data.time = event->clock();
+	if (event->attr.sample_type & (PERF_SAMPLE_ID | PERF_SAMPLE_IDENTIFIER))
+		data.id = event->id;
+	if (event->attr.sample_type & PERF_SAMPLE_CPU) {
+		data.cpu_entry.cpu = smp_processor_id();
+		data.cpu_entry.reserved = 0;
+	}
+	if (event->attr.sample_type & PERF_SAMPLE_RAW) {
+		raw.frag.size = rawsize;
+		raw.frag.data = cpump->save;
+		perf_sample_save_raw_data(&data, &raw);
+	}
+
+	overflow = perf_event_overflow(event, &data, &regs);
+	perf_event_update_userpage(event);
+	/* Clear lowcore page after read */
+	memset(cpump->page, 0, PAGE_SIZE);
+	return overflow;
+}
+
+/* Called on schedule-in and schedule-out. No access to event structure,
+ * but for sampling only event CRYPTO_ALL is allowed.
+ */
+static void paicrypt_sched_task(struct perf_event_pmu_context *pmu_ctx, bool sched_in)
+{
+	/* We started with a clean page on event installation. So read out
+	 * results on schedule_out and if page was dirty, clear values.
+	 */
+	if (!sched_in)
+		paicrypt_push_sample();
+}
+
+/* Attribute definitions for paicrypt interface. As with other CPU
+ * Measurement Facilities, there is one attribute per mapped counter.
+ * The number of mapped counters may vary per machine generation. Use
+ * the QUERY PROCESSOR ACTIVITY COUNTER INFORMATION (QPACI) instruction
+ * to determine the number of mapped counters. The instructions returns
+ * a positive number, which is the highest number of supported counters.
+ * All counters less than this number are also supported, there are no
+ * holes. A returned number of zero means no support for mapped counters.
+ *
+ * The identification of the counter is a unique number. The chosen range
+ * is 0x1000 + offset in mapped kernel page.
+ * All CPU Measurement Facility counters identifiers must be unique and
+ * the numbers from 0 to 496 are already used for the CPU Measurement
+ * Counter facility. Numbers 0xb0000, 0xbc000 and 0xbd000 are already
+ * used for the CPU Measurement Sampling facility.
+ */
+PMU_FORMAT_ATTR(event, "config:0-63");
+
+static struct attribute *paicrypt_format_attr[] = {
+	&format_attr_event.attr,
+	NULL,
+};
+
+static struct attribute_group paicrypt_events_group = {
+	.name = "events",
+	.attrs = NULL			/* Filled in attr_event_init() */
+};
+
+static struct attribute_group paicrypt_format_group = {
+	.name = "format",
+	.attrs = paicrypt_format_attr,
+};
+
+static const struct attribute_group *paicrypt_attr_groups[] = {
+	&paicrypt_events_group,
+	&paicrypt_format_group,
+	NULL,
+};
+
+/* Performance monitoring unit for mapped counters */
+static struct pmu paicrypt = {
+	.task_ctx_nr  = perf_invalid_context,
+	.event_init   = paicrypt_event_init,
+	.add	      = paicrypt_add,
+	.del	      = paicrypt_del,
+	.start	      = paicrypt_start,
+	.stop	      = paicrypt_stop,
+	.read	      = paicrypt_read,
+	.sched_task   = paicrypt_sched_task,
+	.attr_groups  = paicrypt_attr_groups
+};
+
+/* List of symbolic PAI counter names. */
+static const char * const paicrypt_ctrnames[] = {
+	[0] = "CRYPTO_ALL",
+	[1] = "KM_DEA",
+	[2] = "KM_TDEA_128",
+	[3] = "KM_TDEA_192",
+	[4] = "KM_ENCRYPTED_DEA",
+	[5] = "KM_ENCRYPTED_TDEA_128",
+	[6] = "KM_ENCRYPTED_TDEA_192",
+	[7] = "KM_AES_128",
+	[8] = "KM_AES_192",
+	[9] = "KM_AES_256",
+	[10] = "KM_ENCRYPTED_AES_128",
+	[11] = "KM_ENCRYPTED_AES_192",
+	[12] = "KM_ENCRYPTED_AES_256",
+	[13] = "KM_XTS_AES_128",
+	[14] = "KM_XTS_AES_256",
+	[15] = "KM_XTS_ENCRYPTED_AES_128",
+	[16] = "KM_XTS_ENCRYPTED_AES_256",
+	[17] = "KMC_DEA",
+	[18] = "KMC_TDEA_128",
+	[19] = "KMC_TDEA_192",
+	[20] = "KMC_ENCRYPTED_DEA",
+	[21] = "KMC_ENCRYPTED_TDEA_128",
+	[22] = "KMC_ENCRYPTED_TDEA_192",
+	[23] = "KMC_AES_128",
+	[24] = "KMC_AES_192",
+	[25] = "KMC_AES_256",
+	[26] = "KMC_ENCRYPTED_AES_128",
+	[27] = "KMC_ENCRYPTED_AES_192",
+	[28] = "KMC_ENCRYPTED_AES_256",
+	[29] = "KMC_PRNG",
+	[30] = "KMA_GCM_AES_128",
+	[31] = "KMA_GCM_AES_192",
+	[32] = "KMA_GCM_AES_256",
+	[33] = "KMA_GCM_ENCRYPTED_AES_128",
+	[34] = "KMA_GCM_ENCRYPTED_AES_192",
+	[35] = "KMA_GCM_ENCRYPTED_AES_256",
+	[36] = "KMF_DEA",
+	[37] = "KMF_TDEA_128",
+	[38] = "KMF_TDEA_192",
+	[39] = "KMF_ENCRYPTED_DEA",
+	[40] = "KMF_ENCRYPTED_TDEA_128",
+	[41] = "KMF_ENCRYPTED_TDEA_192",
+	[42] = "KMF_AES_128",
+	[43] = "KMF_AES_192",
+	[44] = "KMF_AES_256",
+	[45] = "KMF_ENCRYPTED_AES_128",
+	[46] = "KMF_ENCRYPTED_AES_192",
+	[47] = "KMF_ENCRYPTED_AES_256",
+	[48] = "KMCTR_DEA",
+	[49] = "KMCTR_TDEA_128",
+	[50] = "KMCTR_TDEA_192",
+	[51] = "KMCTR_ENCRYPTED_DEA",
+	[52] = "KMCTR_ENCRYPTED_TDEA_128",
+	[53] = "KMCTR_ENCRYPTED_TDEA_192",
+	[54] = "KMCTR_AES_128",
+	[55] = "KMCTR_AES_192",
+	[56] = "KMCTR_AES_256",
+	[57] = "KMCTR_ENCRYPTED_AES_128",
+	[58] = "KMCTR_ENCRYPTED_AES_192",
+	[59] = "KMCTR_ENCRYPTED_AES_256",
+	[60] = "KMO_DEA",
+	[61] = "KMO_TDEA_128",
+	[62] = "KMO_TDEA_192",
+	[63] = "KMO_ENCRYPTED_DEA",
+	[64] = "KMO_ENCRYPTED_TDEA_128",
+	[65] = "KMO_ENCRYPTED_TDEA_192",
+	[66] = "KMO_AES_128",
+	[67] = "KMO_AES_192",
+	[68] = "KMO_AES_256",
+	[69] = "KMO_ENCRYPTED_AES_128",
+	[70] = "KMO_ENCRYPTED_AES_192",
+	[71] = "KMO_ENCRYPTED_AES_256",
+	[72] = "KIMD_SHA_1",
+	[73] = "KIMD_SHA_256",
+	[74] = "KIMD_SHA_512",
+	[75] = "KIMD_SHA3_224",
+	[76] = "KIMD_SHA3_256",
+	[77] = "KIMD_SHA3_384",
+	[78] = "KIMD_SHA3_512",
+	[79] = "KIMD_SHAKE_128",
+	[80] = "KIMD_SHAKE_256",
+	[81] = "KIMD_GHASH",
+	[82] = "KLMD_SHA_1",
+	[83] = "KLMD_SHA_256",
+	[84] = "KLMD_SHA_512",
+	[85] = "KLMD_SHA3_224",
+	[86] = "KLMD_SHA3_256",
+	[87] = "KLMD_SHA3_384",
+	[88] = "KLMD_SHA3_512",
+	[89] = "KLMD_SHAKE_128",
+	[90] = "KLMD_SHAKE_256",
+	[91] = "KMAC_DEA",
+	[92] = "KMAC_TDEA_128",
+	[93] = "KMAC_TDEA_192",
+	[94] = "KMAC_ENCRYPTED_DEA",
+	[95] = "KMAC_ENCRYPTED_TDEA_128",
+	[96] = "KMAC_ENCRYPTED_TDEA_192",
+	[97] = "KMAC_AES_128",
+	[98] = "KMAC_AES_192",
+	[99] = "KMAC_AES_256",
+	[100] = "KMAC_ENCRYPTED_AES_128",
+	[101] = "KMAC_ENCRYPTED_AES_192",
+	[102] = "KMAC_ENCRYPTED_AES_256",
+	[103] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_DEA",
+	[104] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_TDEA_128",
+	[105] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_TDEA_192",
+	[106] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_ENCRYPTED_DEA",
+	[107] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_ENCRYPTED_TDEA_128",
+	[108] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_ENCRYPTED_TDEA_192",
+	[109] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_AES_128",
+	[110] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_AES_192",
+	[111] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_AES_256",
+	[112] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_ENCRYPTED_AES_128",
+	[113] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_ENCRYPTED_AES_192",
+	[114] = "PCC_COMPUTE_LAST_BLOCK_CMAC_USING_ENCRYPTED_AES_256A",
+	[115] = "PCC_COMPUTE_XTS_PARAMETER_USING_AES_128",
+	[116] = "PCC_COMPUTE_XTS_PARAMETER_USING_AES_256",
+	[117] = "PCC_COMPUTE_XTS_PARAMETER_USING_ENCRYPTED_AES_128",
+	[118] = "PCC_COMPUTE_XTS_PARAMETER_USING_ENCRYPTED_AES_256",
+	[119] = "PCC_SCALAR_MULTIPLY_P256",
+	[120] = "PCC_SCALAR_MULTIPLY_P384",
+	[121] = "PCC_SCALAR_MULTIPLY_P521",
+	[122] = "PCC_SCALAR_MULTIPLY_ED25519",
+	[123] = "PCC_SCALAR_MULTIPLY_ED448",
+	[124] = "PCC_SCALAR_MULTIPLY_X25519",
+	[125] = "PCC_SCALAR_MULTIPLY_X448",
+	[126] = "PRNO_SHA_512_DRNG",
+	[127] = "PRNO_TRNG_QUERY_RAW_TO_CONDITIONED_RATIO",
+	[128] = "PRNO_TRNG",
+	[129] = "KDSA_ECDSA_VERIFY_P256",
+	[130] = "KDSA_ECDSA_VERIFY_P384",
+	[131] = "KDSA_ECDSA_VERIFY_P521",
+	[132] = "KDSA_ECDSA_SIGN_P256",
+	[133] = "KDSA_ECDSA_SIGN_P384",
+	[134] = "KDSA_ECDSA_SIGN_P521",
+	[135] = "KDSA_ENCRYPTED_ECDSA_SIGN_P256",
+	[136] = "KDSA_ENCRYPTED_ECDSA_SIGN_P384",
+	[137] = "KDSA_ENCRYPTED_ECDSA_SIGN_P521",
+	[138] = "KDSA_EDDSA_VERIFY_ED25519",
+	[139] = "KDSA_EDDSA_VERIFY_ED448",
+	[140] = "KDSA_EDDSA_SIGN_ED25519",
+	[141] = "KDSA_EDDSA_SIGN_ED448",
+	[142] = "KDSA_ENCRYPTED_EDDSA_SIGN_ED25519",
+	[143] = "KDSA_ENCRYPTED_EDDSA_SIGN_ED448",
+	[144] = "PCKMO_ENCRYPT_DEA_KEY",
+	[145] = "PCKMO_ENCRYPT_TDEA_128_KEY",
+	[146] = "PCKMO_ENCRYPT_TDEA_192_KEY",
+	[147] = "PCKMO_ENCRYPT_AES_128_KEY",
+	[148] = "PCKMO_ENCRYPT_AES_192_KEY",
+	[149] = "PCKMO_ENCRYPT_AES_256_KEY",
+	[150] = "PCKMO_ENCRYPT_ECC_P256_KEY",
+	[151] = "PCKMO_ENCRYPT_ECC_P384_KEY",
+	[152] = "PCKMO_ENCRYPT_ECC_P521_KEY",
+	[153] = "PCKMO_ENCRYPT_ECC_ED25519_KEY",
+	[154] = "PCKMO_ENCRYPT_ECC_ED448_KEY",
+	[155] = "IBM_RESERVED_155",
+	[156] = "IBM_RESERVED_156",
+};
+
+static void __init attr_event_free(struct attribute **attrs, int num)
+{
+	struct perf_pmu_events_attr *pa;
+	int i;
+
+	for (i = 0; i < num; i++) {
+		struct device_attribute *dap;
+
+		dap = container_of(attrs[i], struct device_attribute, attr);
+		pa = container_of(dap, struct perf_pmu_events_attr, attr);
+		kfree(pa);
+	}
+	kfree(attrs);
+}
+
+static int __init attr_event_init_one(struct attribute **attrs, int num)
+{
+	struct perf_pmu_events_attr *pa;
+
+	pa = kzalloc(sizeof(*pa), GFP_KERNEL);
+	if (!pa)
+		return -ENOMEM;
+
+	sysfs_attr_init(&pa->attr.attr);
+	pa->id = PAI_CRYPTO_BASE + num;
+	pa->attr.attr.name = paicrypt_ctrnames[num];
+	pa->attr.attr.mode = 0444;
+	pa->attr.show = cpumf_events_sysfs_show;
+	pa->attr.store = NULL;
+	attrs[num] = &pa->attr.attr;
+	return 0;
+}
+
+/* Create PMU sysfs event attributes on the fly. */
+static int __init attr_event_init(void)
+{
+	struct attribute **attrs;
+	int ret, i;
+
+	attrs = kmalloc_array(ARRAY_SIZE(paicrypt_ctrnames) + 1, sizeof(*attrs),
+			      GFP_KERNEL);
+	if (!attrs)
+		return -ENOMEM;
+	for (i = 0; i < ARRAY_SIZE(paicrypt_ctrnames); i++) {
+		ret = attr_event_init_one(attrs, i);
+		if (ret) {
+			attr_event_free(attrs, i - 1);
+			return ret;
+		}
+	}
+	attrs[i] = NULL;
+	paicrypt_events_group.attrs = attrs;
+	return 0;
+}
+
+static int __init paicrypt_init(void)
+{
+	struct qpaci_info_block ib;
+	int rc;
+
+	if (!test_facility(196))
+		return 0;
+
+	qpaci(&ib);
+	paicrypt_cnt = ib.num_cc;
+	if (paicrypt_cnt == 0)
+		return 0;
+	if (paicrypt_cnt >= PAI_CRYPTO_MAXCTR)
+		paicrypt_cnt = PAI_CRYPTO_MAXCTR - 1;
+
+	rc = attr_event_init();		/* Export known PAI crypto events */
+	if (rc) {
+		pr_err("Creation of PMU pai_crypto /sysfs failed\n");
+		return rc;
+	}
+
+	/* Setup s390dbf facility */
+	cfm_dbg = debug_register(KMSG_COMPONENT, 2, 256, 128);
+	if (!cfm_dbg) {
+		pr_err("Registration of s390dbf pai_crypto failed\n");
+		return -ENOMEM;
+	}
+	debug_register_view(cfm_dbg, &debug_sprintf_view);
+
+	rc = perf_pmu_register(&paicrypt, "pai_crypto", -1);
+	if (rc) {
+		pr_err("Registering the pai_crypto PMU failed with rc=%i\n",
+		       rc);
+		debug_unregister_view(cfm_dbg, &debug_sprintf_view);
+		debug_unregister(cfm_dbg);
+		return rc;
+	}
+	return 0;
+}
+
+device_initcall(paicrypt_init);