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, 1067 insertions, 0 deletions

diff --git a/Documentation/ia64/err_inject.rst b/Documentation/ia64/err_inject.rst
new file mode 100644
index 000000000..900f71e93
--- /dev/null
+++ b/Documentation/ia64/err_inject.rst
@@ -0,0 +1,1067 @@
+========================================
+IPF Machine Check (MC) error inject tool
+========================================
+
+IPF Machine Check (MC) error inject tool is used to inject MC
+errors from Linux. The tool is a test bed for IPF MC work flow including
+hardware correctable error handling, OS recoverable error handling, MC
+event logging, etc.
+
+The tool includes two parts: a kernel driver and a user application
+sample. The driver provides interface to PAL to inject error
+and query error injection capabilities. The driver code is in
+arch/ia64/kernel/err_inject.c. The application sample (shown below)
+provides a combination of various errors and calls the driver's interface
+(sysfs interface) to inject errors or query error injection capabilities.
+
+The tool can be used to test Intel IPF machine MC handling capabilities.
+It's especially useful for people who can not access hardware MC injection
+tool to inject error. It's also very useful to integrate with other
+software test suits to do stressful testing on IPF.
+
+Below is a sample application as part of the whole tool. The sample
+can be used as a working test tool. Or it can be expanded to include
+more features. It also can be a integrated into a library or other user
+application to have more thorough test.
+
+The sample application takes err.conf as error configuration input. GCC
+compiles the code. After you install err_inject driver, you can run
+this sample application to inject errors.
+
+Errata: Itanium 2 Processors Specification Update lists some errata against
+the pal_mc_error_inject PAL procedure. The following err.conf has been tested
+on latest Montecito PAL.
+
+err.conf::
+
+  #This is configuration file for err_inject_tool.
+  #The format of the each line is:
+  #cpu, loop, interval, err_type_info, err_struct_info, err_data_buffer
+  #where
+  #	cpu: logical cpu number the error will be inject in.
+  #	loop: times the error will be injected.
+  #	interval: In second. every so often one error is injected.
+  #	err_type_info, err_struct_info: PAL parameters.
+  #
+  #Note: All values are hex w/o or w/ 0x prefix.
+
+
+  #On cpu2, inject only total 0x10 errors, interval 5 seconds
+  #corrected, data cache, hier-2, physical addr(assigned by tool code).
+  #working on Montecito latest PAL.
+  2, 10, 5, 4101, 95
+
+  #On cpu4, inject and consume total 0x10 errors, interval 5 seconds
+  #corrected, data cache, hier-2, physical addr(assigned by tool code).
+  #working on Montecito latest PAL.
+  4, 10, 5, 4109, 95
+
+  #On cpu15, inject and consume total 0x10 errors, interval 5 seconds
+  #recoverable, DTR0, hier-2.
+  #working on Montecito latest PAL.
+  0xf, 0x10, 5, 4249, 15
+
+The sample application source code:
+
+err_injection_tool.c::
+
+  /*
+   * This program is free software; you can redistribute it and/or modify
+   * it under the terms of the GNU General Public License as published by
+   * the Free Software Foundation; either version 2 of the License, or
+   * (at your option) any later version.
+   *
+   * This program is distributed in the hope that it will be useful, but
+   * WITHOUT ANY WARRANTY; without even the implied warranty of
+   * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
+   * NON INFRINGEMENT.  See the GNU General Public License for more
+   * details.
+   *
+   * You should have received a copy of the GNU General Public License
+   * along with this program; if not, write to the Free Software
+   * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+   *
+   * Copyright (C) 2006 Intel Co
+   *	Fenghua Yu <fenghua.yu@intel.com>
+   *
+   */
+  #include <sys/types.h>
+  #include <sys/stat.h>
+  #include <fcntl.h>
+  #include <stdio.h>
+  #include <sched.h>
+  #include <unistd.h>
+  #include <stdlib.h>
+  #include <stdarg.h>
+  #include <string.h>
+  #include <errno.h>
+  #include <time.h>
+  #include <sys/ipc.h>
+  #include <sys/sem.h>
+  #include <sys/wait.h>
+  #include <sys/mman.h>
+  #include <sys/shm.h>
+
+  #define MAX_FN_SIZE 		256
+  #define MAX_BUF_SIZE 		256
+  #define DATA_BUF_SIZE 		256
+  #define NR_CPUS 		512
+  #define MAX_TASK_NUM		2048
+  #define MIN_INTERVAL		5	// seconds
+  #define	ERR_DATA_BUFFER_SIZE 	3	// Three 8-byte.
+  #define PARA_FIELD_NUM		5
+  #define MASK_SIZE		(NR_CPUS/64)
+  #define PATH_FORMAT "/sys/devices/system/cpu/cpu%d/err_inject/"
+
+  int sched_setaffinity(pid_t pid, unsigned int len, unsigned long *mask);
+
+  int verbose;
+  #define vbprintf if (verbose) printf
+
+  int log_info(int cpu, const char *fmt, ...)
+  {
+	FILE *log;
+	char fn[MAX_FN_SIZE];
+	char buf[MAX_BUF_SIZE];
+	va_list args;
+
+	sprintf(fn, "%d.log", cpu);
+	log=fopen(fn, "a+");
+	if (log==NULL) {
+		perror("Error open:");
+		return -1;
+	}
+
+	va_start(args, fmt);
+	vprintf(fmt, args);
+	memset(buf, 0, MAX_BUF_SIZE);
+	vsprintf(buf, fmt, args);
+	va_end(args);
+
+	fwrite(buf, sizeof(buf), 1, log);
+	fclose(log);
+
+	return 0;
+  }
+
+  typedef unsigned long u64;
+  typedef unsigned int  u32;
+
+  typedef union err_type_info_u {
+	struct {
+		u64	mode		: 3,	/* 0-2 */
+			err_inj		: 3,	/* 3-5 */
+			err_sev		: 2,	/* 6-7 */
+			err_struct	: 5,	/* 8-12 */
+			struct_hier	: 3,	/* 13-15 */
+			reserved	: 48;	/* 16-63 */
+	} err_type_info_u;
+	u64	err_type_info;
+  } err_type_info_t;
+
+  typedef union err_struct_info_u {
+	struct {
+		u64	siv		: 1,	/* 0	 */
+			c_t		: 2,	/* 1-2	 */
+			cl_p		: 3,	/* 3-5	 */
+			cl_id		: 3,	/* 6-8	 */
+			cl_dp		: 1,	/* 9	 */
+			reserved1	: 22,	/* 10-31 */
+			tiv		: 1,	/* 32	 */
+			trigger		: 4,	/* 33-36 */
+			trigger_pl 	: 3,	/* 37-39 */
+			reserved2 	: 24;	/* 40-63 */
+	} err_struct_info_cache;
+	struct {
+		u64	siv		: 1,	/* 0	 */
+			tt		: 2,	/* 1-2	 */
+			tc_tr		: 2,	/* 3-4	 */
+			tr_slot		: 8,	/* 5-12	 */
+			reserved1	: 19,	/* 13-31 */
+			tiv		: 1,	/* 32	 */
+			trigger		: 4,	/* 33-36 */
+			trigger_pl 	: 3,	/* 37-39 */
+			reserved2 	: 24;	/* 40-63 */
+	} err_struct_info_tlb;
+	struct {
+		u64	siv		: 1,	/* 0	 */
+			regfile_id	: 4,	/* 1-4	 */
+			reg_num		: 7,	/* 5-11	 */
+			reserved1	: 20,	/* 12-31 */
+			tiv		: 1,	/* 32	 */
+			trigger		: 4,	/* 33-36 */
+			trigger_pl 	: 3,	/* 37-39 */
+			reserved2 	: 24;	/* 40-63 */
+	} err_struct_info_register;
+	struct {
+		u64	reserved;
+	} err_struct_info_bus_processor_interconnect;
+	u64	err_struct_info;
+  } err_struct_info_t;
+
+  typedef union err_data_buffer_u {
+	struct {
+		u64	trigger_addr;		/* 0-63		*/
+		u64	inj_addr;		/* 64-127 	*/
+		u64	way		: 5,	/* 128-132	*/
+			index		: 20,	/* 133-152	*/
+					: 39;	/* 153-191	*/
+	} err_data_buffer_cache;
+	struct {
+		u64	trigger_addr;		/* 0-63		*/
+		u64	inj_addr;		/* 64-127 	*/
+		u64	way		: 5,	/* 128-132	*/
+			index		: 20,	/* 133-152	*/
+			reserved	: 39;	/* 153-191	*/
+	} err_data_buffer_tlb;
+	struct {
+		u64	trigger_addr;		/* 0-63		*/
+	} err_data_buffer_register;
+	struct {
+		u64	reserved;		/* 0-63		*/
+	} err_data_buffer_bus_processor_interconnect;
+	u64 err_data_buffer[ERR_DATA_BUFFER_SIZE];
+  } err_data_buffer_t;
+
+  typedef union capabilities_u {
+	struct {
+		u64	i		: 1,
+			d		: 1,
+			rv		: 1,
+			tag		: 1,
+			data		: 1,
+			mesi		: 1,
+			dp		: 1,
+			reserved1	: 3,
+			pa		: 1,
+			va		: 1,
+			wi		: 1,
+			reserved2	: 20,
+			trigger		: 1,
+			trigger_pl	: 1,
+			reserved3	: 30;
+	} capabilities_cache;
+	struct {
+		u64	d		: 1,
+			i		: 1,
+			rv		: 1,
+			tc		: 1,
+			tr		: 1,
+			reserved1	: 27,
+			trigger		: 1,
+			trigger_pl	: 1,
+			reserved2	: 30;
+	} capabilities_tlb;
+	struct {
+		u64	gr_b0		: 1,
+			gr_b1		: 1,
+			fr		: 1,
+			br		: 1,
+			pr		: 1,
+			ar		: 1,
+			cr		: 1,
+			rr		: 1,
+			pkr		: 1,
+			dbr		: 1,
+			ibr		: 1,
+			pmc		: 1,
+			pmd		: 1,
+			reserved1	: 3,
+			regnum		: 1,
+			reserved2	: 15,
+			trigger		: 1,
+			trigger_pl	: 1,
+			reserved3	: 30;
+	} capabilities_register;
+	struct {
+		u64	reserved;
+	} capabilities_bus_processor_interconnect;
+  } capabilities_t;
+
+  typedef struct resources_s {
+	u64	ibr0		: 1,
+		ibr2		: 1,
+		ibr4		: 1,
+		ibr6		: 1,
+		dbr0		: 1,
+		dbr2		: 1,
+		dbr4		: 1,
+		dbr6		: 1,
+		reserved	: 48;
+  } resources_t;
+
+
+  long get_page_size(void)
+  {
+	long page_size=sysconf(_SC_PAGESIZE);
+	return page_size;
+  }
+
+  #define PAGE_SIZE (get_page_size()==-1?0x4000:get_page_size())
+  #define SHM_SIZE (2*PAGE_SIZE*NR_CPUS)
+  #define SHM_VA 0x2000000100000000
+
+  int shmid;
+  void *shmaddr;
+
+  int create_shm(void)
+  {
+	key_t key;
+	char fn[MAX_FN_SIZE];
+
+	/* cpu0 is always existing */
+	sprintf(fn, PATH_FORMAT, 0);
+	if ((key = ftok(fn, 's')) == -1) {
+		perror("ftok");
+		return -1;
+	}
+
+	shmid = shmget(key, SHM_SIZE, 0644 | IPC_CREAT);
+	if (shmid == -1) {
+		if (errno==EEXIST) {
+			shmid = shmget(key, SHM_SIZE, 0);
+			if (shmid == -1) {
+				perror("shmget");
+				return -1;
+			}
+		}
+		else {
+			perror("shmget");
+			return -1;
+		}
+	}
+	vbprintf("shmid=%d", shmid);
+
+	/* connect to the segment: */
+	shmaddr = shmat(shmid, (void *)SHM_VA, 0);
+	if (shmaddr == (void*)-1) {
+		perror("shmat");
+		return -1;
+	}
+
+	memset(shmaddr, 0, SHM_SIZE);
+	mlock(shmaddr, SHM_SIZE);
+
+	return 0;
+  }
+
+  int free_shm()
+  {
+	munlock(shmaddr, SHM_SIZE);
+          shmdt(shmaddr);
+	semctl(shmid, 0, IPC_RMID);
+
+	return 0;
+  }
+
+  #ifdef _SEM_SEMUN_UNDEFINED
+  union semun
+  {
+	int val;
+	struct semid_ds *buf;
+	unsigned short int *array;
+	struct seminfo *__buf;
+  };
+  #endif
+
+  u32 mode=1; /* 1: physical mode; 2: virtual mode. */
+  int one_lock=1;
+  key_t key[NR_CPUS];
+  int semid[NR_CPUS];
+
+  int create_sem(int cpu)
+  {
+	union semun arg;
+	char fn[MAX_FN_SIZE];
+	int sid;
+
+	sprintf(fn, PATH_FORMAT, cpu);
+	sprintf(fn, "%s/%s", fn, "err_type_info");
+	if ((key[cpu] = ftok(fn, 'e')) == -1) {
+		perror("ftok");
+		return -1;
+	}
+
+	if (semid[cpu]!=0)
+		return 0;
+
+	/* clear old semaphore */
+	if ((sid = semget(key[cpu], 1, 0)) != -1)
+		semctl(sid, 0, IPC_RMID);
+
+	/* get one semaphore */
+	if ((semid[cpu] = semget(key[cpu], 1, IPC_CREAT | IPC_EXCL)) == -1) {
+		perror("semget");
+		printf("Please remove semaphore with key=0x%lx, then run the tool.\n",
+			(u64)key[cpu]);
+		return -1;
+	}
+
+	vbprintf("semid[%d]=0x%lx, key[%d]=%lx\n",cpu,(u64)semid[cpu],cpu,
+		(u64)key[cpu]);
+	/* initialize the semaphore to 1: */
+	arg.val = 1;
+	if (semctl(semid[cpu], 0, SETVAL, arg) == -1) {
+		perror("semctl");
+		return -1;
+	}
+
+	return 0;
+  }
+
+  static int lock(int cpu)
+  {
+	struct sembuf lock;
+
+	lock.sem_num = cpu;
+	lock.sem_op = 1;
+	semop(semid[cpu], &lock, 1);
+
+          return 0;
+  }
+
+  static int unlock(int cpu)
+  {
+	struct sembuf unlock;
+
+	unlock.sem_num = cpu;
+	unlock.sem_op = -1;
+	semop(semid[cpu], &unlock, 1);
+
+          return 0;
+  }
+
+  void free_sem(int cpu)
+  {
+	semctl(semid[cpu], 0, IPC_RMID);
+  }
+
+  int wr_multi(char *fn, unsigned long *data, int size)
+  {
+	int fd;
+	char buf[MAX_BUF_SIZE];
+	int ret;
+
+	if (size==1)
+		sprintf(buf, "%lx", *data);
+	else if (size==3)
+		sprintf(buf, "%lx,%lx,%lx", data[0], data[1], data[2]);
+	else {
+		fprintf(stderr,"write to file with wrong size!\n");
+		return -1;
+	}
+
+	fd=open(fn, O_RDWR);
+	if (!fd) {
+		perror("Error:");
+		return -1;
+	}
+	ret=write(fd, buf, sizeof(buf));
+	close(fd);
+	return ret;
+  }
+
+  int wr(char *fn, unsigned long data)
+  {
+	return wr_multi(fn, &data, 1);
+  }
+
+  int rd(char *fn, unsigned long *data)
+  {
+	int fd;
+	char buf[MAX_BUF_SIZE];
+
+	fd=open(fn, O_RDONLY);
+	if (fd<0) {
+		perror("Error:");
+		return -1;
+	}
+	read(fd, buf, MAX_BUF_SIZE);
+	*data=strtoul(buf, NULL, 16);
+	close(fd);
+	return 0;
+  }
+
+  int rd_status(char *path, int *status)
+  {
+	char fn[MAX_FN_SIZE];
+	sprintf(fn, "%s/status", path);
+	if (rd(fn, (u64*)status)<0) {
+		perror("status reading error.\n");
+		return -1;
+	}
+
+	return 0;
+  }
+
+  int rd_capabilities(char *path, u64 *capabilities)
+  {
+	char fn[MAX_FN_SIZE];
+	sprintf(fn, "%s/capabilities", path);
+	if (rd(fn, capabilities)<0) {
+		perror("capabilities reading error.\n");
+		return -1;
+	}
+
+	return 0;
+  }
+
+  int rd_all(char *path)
+  {
+	unsigned long err_type_info, err_struct_info, err_data_buffer;
+	int status;
+	unsigned long capabilities, resources;
+	char fn[MAX_FN_SIZE];
+
+	sprintf(fn, "%s/err_type_info", path);
+	if (rd(fn, &err_type_info)<0) {
+		perror("err_type_info reading error.\n");
+		return -1;
+	}
+	printf("err_type_info=%lx\n", err_type_info);
+
+	sprintf(fn, "%s/err_struct_info", path);
+	if (rd(fn, &err_struct_info)<0) {
+		perror("err_struct_info reading error.\n");
+		return -1;
+	}
+	printf("err_struct_info=%lx\n", err_struct_info);
+
+	sprintf(fn, "%s/err_data_buffer", path);
+	if (rd(fn, &err_data_buffer)<0) {
+		perror("err_data_buffer reading error.\n");
+		return -1;
+	}
+	printf("err_data_buffer=%lx\n", err_data_buffer);
+
+	sprintf(fn, "%s/status", path);
+	if (rd("status", (u64*)&status)<0) {
+		perror("status reading error.\n");
+		return -1;
+	}
+	printf("status=%d\n", status);
+
+	sprintf(fn, "%s/capabilities", path);
+	if (rd(fn,&capabilities)<0) {
+		perror("capabilities reading error.\n");
+		return -1;
+	}
+	printf("capabilities=%lx\n", capabilities);
+
+	sprintf(fn, "%s/resources", path);
+	if (rd(fn, &resources)<0) {
+		perror("resources reading error.\n");
+		return -1;
+	}
+	printf("resources=%lx\n", resources);
+
+	return 0;
+  }
+
+  int query_capabilities(char *path, err_type_info_t err_type_info,
+			u64 *capabilities)
+  {
+	char fn[MAX_FN_SIZE];
+	err_struct_info_t err_struct_info;
+	err_data_buffer_t err_data_buffer;
+
+	err_struct_info.err_struct_info=0;
+	memset(err_data_buffer.err_data_buffer, -1, ERR_DATA_BUFFER_SIZE*8);
+
+	sprintf(fn, "%s/err_type_info", path);
+	wr(fn, err_type_info.err_type_info);
+	sprintf(fn, "%s/err_struct_info", path);
+	wr(fn, 0x0);
+	sprintf(fn, "%s/err_data_buffer", path);
+	wr_multi(fn, err_data_buffer.err_data_buffer, ERR_DATA_BUFFER_SIZE);
+
+	// Fire pal_mc_error_inject procedure.
+	sprintf(fn, "%s/call_start", path);
+	wr(fn, mode);
+
+	if (rd_capabilities(path, capabilities)<0)
+		return -1;
+
+	return 0;
+  }
+
+  int query_all_capabilities()
+  {
+	int status;
+	err_type_info_t err_type_info;
+	int err_sev, err_struct, struct_hier;
+	int cap=0;
+	u64 capabilities;
+	char path[MAX_FN_SIZE];
+
+	err_type_info.err_type_info=0;			// Initial
+	err_type_info.err_type_info_u.mode=0;		// Query mode;
+	err_type_info.err_type_info_u.err_inj=0;
+
+	printf("All capabilities implemented in pal_mc_error_inject:\n");
+	sprintf(path, PATH_FORMAT ,0);
+	for (err_sev=0;err_sev<3;err_sev++)
+		for (err_struct=0;err_struct<5;err_struct++)
+			for (struct_hier=0;struct_hier<5;struct_hier++)
+	{
+		status=-1;
+		capabilities=0;
+		err_type_info.err_type_info_u.err_sev=err_sev;
+		err_type_info.err_type_info_u.err_struct=err_struct;
+		err_type_info.err_type_info_u.struct_hier=struct_hier;
+
+		if (query_capabilities(path, err_type_info, &capabilities)<0)
+			continue;
+
+		if (rd_status(path, &status)<0)
+			continue;
+
+		if (status==0) {
+			cap=1;
+			printf("For err_sev=%d, err_struct=%d, struct_hier=%d: ",
+				err_sev, err_struct, struct_hier);
+			printf("capabilities 0x%lx\n", capabilities);
+		}
+	}
+	if (!cap) {
+		printf("No capabilities supported.\n");
+		return 0;
+	}
+
+	return 0;
+  }
+
+  int err_inject(int cpu, char *path, err_type_info_t err_type_info,
+		err_struct_info_t err_struct_info,
+		err_data_buffer_t err_data_buffer)
+  {
+	int status;
+	char fn[MAX_FN_SIZE];
+
+	log_info(cpu, "err_type_info=%lx, err_struct_info=%lx, ",
+		err_type_info.err_type_info,
+		err_struct_info.err_struct_info);
+	log_info(cpu,"err_data_buffer=[%lx,%lx,%lx]\n",
+		err_data_buffer.err_data_buffer[0],
+		err_data_buffer.err_data_buffer[1],
+		err_data_buffer.err_data_buffer[2]);
+	sprintf(fn, "%s/err_type_info", path);
+	wr(fn, err_type_info.err_type_info);
+	sprintf(fn, "%s/err_struct_info", path);
+	wr(fn, err_struct_info.err_struct_info);
+	sprintf(fn, "%s/err_data_buffer", path);
+	wr_multi(fn, err_data_buffer.err_data_buffer, ERR_DATA_BUFFER_SIZE);
+
+	// Fire pal_mc_error_inject procedure.
+	sprintf(fn, "%s/call_start", path);
+	wr(fn,mode);
+
+	if (rd_status(path, &status)<0) {
+		vbprintf("fail: read status\n");
+		return -100;
+	}
+
+	if (status!=0) {
+		log_info(cpu, "fail: status=%d\n", status);
+		return status;
+	}
+
+	return status;
+  }
+
+  static int construct_data_buf(char *path, err_type_info_t err_type_info,
+		err_struct_info_t err_struct_info,
+		err_data_buffer_t *err_data_buffer,
+		void *va1)
+  {
+	char fn[MAX_FN_SIZE];
+	u64 virt_addr=0, phys_addr=0;
+
+	vbprintf("va1=%lx\n", (u64)va1);
+	memset(&err_data_buffer->err_data_buffer_cache, 0, ERR_DATA_BUFFER_SIZE*8);
+
+	switch (err_type_info.err_type_info_u.err_struct) {
+		case 1: // Cache
+			switch (err_struct_info.err_struct_info_cache.cl_id) {
+				case 1: //Virtual addr
+					err_data_buffer->err_data_buffer_cache.inj_addr=(u64)va1;
+					break;
+				case 2: //Phys addr
+					sprintf(fn, "%s/virtual_to_phys", path);
+					virt_addr=(u64)va1;
+					if (wr(fn,virt_addr)<0)
+						return -1;
+					rd(fn, &phys_addr);
+					err_data_buffer->err_data_buffer_cache.inj_addr=phys_addr;
+					break;
+				default:
+					printf("Not supported cl_id\n");
+					break;
+			}
+			break;
+		case 2: //  TLB
+			break;
+		case 3: //  Register file
+			break;
+		case 4: //  Bus/system interconnect
+		default:
+			printf("Not supported err_struct\n");
+			break;
+	}
+
+	return 0;
+  }
+
+  typedef struct {
+	u64 cpu;
+	u64 loop;
+	u64 interval;
+	u64 err_type_info;
+	u64 err_struct_info;
+	u64 err_data_buffer[ERR_DATA_BUFFER_SIZE];
+  } parameters_t;
+
+  parameters_t line_para;
+  int para;
+
+  static int empty_data_buffer(u64 *err_data_buffer)
+  {
+	int empty=1;
+	int i;
+
+	for (i=0;i<ERR_DATA_BUFFER_SIZE; i++)
+	   if (err_data_buffer[i]!=-1)
+		empty=0;
+
+	return empty;
+  }
+
+  int err_inj()
+  {
+	err_type_info_t err_type_info;
+	err_struct_info_t err_struct_info;
+	err_data_buffer_t err_data_buffer;
+	int count;
+	FILE *fp;
+	unsigned long cpu, loop, interval, err_type_info_conf, err_struct_info_conf;
+	u64 err_data_buffer_conf[ERR_DATA_BUFFER_SIZE];
+	int num;
+	int i;
+	char path[MAX_FN_SIZE];
+	parameters_t parameters[MAX_TASK_NUM]={};
+	pid_t child_pid[MAX_TASK_NUM];
+	time_t current_time;
+	int status;
+
+	if (!para) {
+	    fp=fopen("err.conf", "r");
+	    if (fp==NULL) {
+		perror("Error open err.conf");
+		return -1;
+	    }
+
+	    num=0;
+	    while (!feof(fp)) {
+		char buf[256];
+		memset(buf,0,256);
+		fgets(buf, 256, fp);
+		count=sscanf(buf, "%lx, %lx, %lx, %lx, %lx, %lx, %lx, %lx\n",
+				&cpu, &loop, &interval,&err_type_info_conf,
+				&err_struct_info_conf,
+				&err_data_buffer_conf[0],
+				&err_data_buffer_conf[1],
+				&err_data_buffer_conf[2]);
+		if (count!=PARA_FIELD_NUM+3) {
+			err_data_buffer_conf[0]=-1;
+			err_data_buffer_conf[1]=-1;
+			err_data_buffer_conf[2]=-1;
+			count=sscanf(buf, "%lx, %lx, %lx, %lx, %lx\n",
+				&cpu, &loop, &interval,&err_type_info_conf,
+				&err_struct_info_conf);
+			if (count!=PARA_FIELD_NUM)
+				continue;
+		}
+
+		parameters[num].cpu=cpu;
+		parameters[num].loop=loop;
+		parameters[num].interval= interval>MIN_INTERVAL
+					  ?interval:MIN_INTERVAL;
+		parameters[num].err_type_info=err_type_info_conf;
+		parameters[num].err_struct_info=err_struct_info_conf;
+		memcpy(parameters[num++].err_data_buffer,
+			err_data_buffer_conf,ERR_DATA_BUFFER_SIZE*8) ;
+
+		if (num>=MAX_TASK_NUM)
+			break;
+	    }
+	}
+	else {
+		parameters[0].cpu=line_para.cpu;
+		parameters[0].loop=line_para.loop;
+		parameters[0].interval= line_para.interval>MIN_INTERVAL
+					  ?line_para.interval:MIN_INTERVAL;
+		parameters[0].err_type_info=line_para.err_type_info;
+		parameters[0].err_struct_info=line_para.err_struct_info;
+		memcpy(parameters[0].err_data_buffer,
+			line_para.err_data_buffer,ERR_DATA_BUFFER_SIZE*8) ;
+
+		num=1;
+	}
+
+	/* Create semaphore: If one_lock, one semaphore for all processors.
+	   Otherwise, one semaphore for each processor. */
+	if (one_lock) {
+		if (create_sem(0)) {
+			printf("Can not create semaphore...exit\n");
+			free_sem(0);
+			return -1;
+		}
+	}
+	else {
+		for (i=0;i<num;i++) {
+		   if (create_sem(parameters[i].cpu)) {
+			printf("Can not create semaphore for cpu%d...exit\n",i);
+			free_sem(parameters[num].cpu);
+			return -1;
+		   }
+		}
+	}
+
+	/* Create a shm segment which will be used to inject/consume errors on.*/
+	if (create_shm()==-1) {
+		printf("Error to create shm...exit\n");
+		return -1;
+	}
+
+	for (i=0;i<num;i++) {
+		pid_t pid;
+
+		current_time=time(NULL);
+		log_info(parameters[i].cpu, "\nBegine at %s", ctime(&current_time));
+		log_info(parameters[i].cpu, "Configurations:\n");
+		log_info(parameters[i].cpu,"On cpu%ld: loop=%lx, interval=%lx(s)",
+			parameters[i].cpu,
+			parameters[i].loop,
+			parameters[i].interval);
+		log_info(parameters[i].cpu," err_type_info=%lx,err_struct_info=%lx\n",
+			parameters[i].err_type_info,
+			parameters[i].err_struct_info);
+
+		sprintf(path, PATH_FORMAT, (int)parameters[i].cpu);
+		err_type_info.err_type_info=parameters[i].err_type_info;
+		err_struct_info.err_struct_info=parameters[i].err_struct_info;
+		memcpy(err_data_buffer.err_data_buffer,
+			parameters[i].err_data_buffer,
+			ERR_DATA_BUFFER_SIZE*8);
+
+		pid=fork();
+		if (pid==0) {
+			unsigned long mask[MASK_SIZE];
+			int j, k;
+
+			void *va1, *va2;
+
+			/* Allocate two memory areas va1 and va2 in shm */
+			va1=shmaddr+parameters[i].cpu*PAGE_SIZE;
+			va2=shmaddr+parameters[i].cpu*PAGE_SIZE+PAGE_SIZE;
+
+			vbprintf("va1=%lx, va2=%lx\n", (u64)va1, (u64)va2);
+			memset(va1, 0x1, PAGE_SIZE);
+			memset(va2, 0x2, PAGE_SIZE);
+
+			if (empty_data_buffer(err_data_buffer.err_data_buffer))
+				/* If not specified yet, construct data buffer
+				 * with va1
+				 */
+				construct_data_buf(path, err_type_info,
+					err_struct_info, &err_data_buffer,va1);
+
+			for (j=0;j<MASK_SIZE;j++)
+				mask[j]=0;
+
+			cpu=parameters[i].cpu;
+			k = cpu%64;
+			j = cpu/64;
+			mask[j] = 1UL << k;
+
+			if (sched_setaffinity(0, MASK_SIZE*8, mask)==-1) {
+				perror("Error sched_setaffinity:");
+				return -1;
+			}
+
+			for (j=0; j<parameters[i].loop; j++) {
+				log_info(parameters[i].cpu,"Injection ");
+				log_info(parameters[i].cpu,"on cpu%ld: #%d/%ld ",
+
+					parameters[i].cpu,j+1, parameters[i].loop);
+
+				/* Hold the lock */
+				if (one_lock)
+					lock(0);
+				else
+				/* Hold lock on this cpu */
+					lock(parameters[i].cpu);
+
+				if ((status=err_inject(parameters[i].cpu,
+					   path, err_type_info,
+					   err_struct_info, err_data_buffer))
+					   ==0) {
+					/* consume the error for "inject only"*/
+					memcpy(va2, va1, PAGE_SIZE);
+					memcpy(va1, va2, PAGE_SIZE);
+					log_info(parameters[i].cpu,
+						"successful\n");
+				}
+				else {
+					log_info(parameters[i].cpu,"fail:");
+					log_info(parameters[i].cpu,
+						"status=%d\n", status);
+					unlock(parameters[i].cpu);
+					break;
+				}
+				if (one_lock)
+				/* Release the lock */
+					unlock(0);
+				/* Release lock on this cpu */
+				else
+					unlock(parameters[i].cpu);
+
+				if (j < parameters[i].loop-1)
+					sleep(parameters[i].interval);
+			}
+			current_time=time(NULL);
+			log_info(parameters[i].cpu, "Done at %s", ctime(&current_time));
+			return 0;
+		}
+		else if (pid<0) {
+			perror("Error fork:");
+			continue;
+		}
+		child_pid[i]=pid;
+	}
+	for (i=0;i<num;i++)
+		waitpid(child_pid[i], NULL, 0);
+
+	if (one_lock)
+		free_sem(0);
+	else
+		for (i=0;i<num;i++)
+			free_sem(parameters[i].cpu);
+
+	printf("All done.\n");
+
+	return 0;
+  }
+
+  void help()
+  {
+	printf("err_inject_tool:\n");
+	printf("\t-q: query all capabilities. default: off\n");
+	printf("\t-m: procedure mode. 1: physical 2: virtual. default: 1\n");
+	printf("\t-i: inject errors. default: off\n");
+	printf("\t-l: one lock per cpu. default: one lock for all\n");
+	printf("\t-e: error parameters:\n");
+	printf("\t\tcpu,loop,interval,err_type_info,err_struct_info[,err_data_buffer[0],err_data_buffer[1],err_data_buffer[2]]\n");
+	printf("\t\t   cpu: logical cpu number the error will be inject in.\n");
+	printf("\t\t   loop: times the error will be injected.\n");
+	printf("\t\t   interval: In second. every so often one error is injected.\n");
+	printf("\t\t   err_type_info, err_struct_info: PAL parameters.\n");
+	printf("\t\t   err_data_buffer: PAL parameter. Optional. If not present,\n");
+	printf("\t\t                    it's constructed by tool automatically. Be\n");
+	printf("\t\t                    careful to provide err_data_buffer and make\n");
+	printf("\t\t                    sure it's working with the environment.\n");
+	printf("\t    Note:no space between error parameters.\n");
+	printf("\t    default: Take error parameters from err.conf instead of command line.\n");
+	printf("\t-v: verbose. default: off\n");
+	printf("\t-h: help\n\n");
+	printf("The tool will take err.conf file as ");
+	printf("input to inject single or multiple errors ");
+	printf("on one or multiple cpus in parallel.\n");
+  }
+
+  int main(int argc, char **argv)
+  {
+	char c;
+	int do_err_inj=0;
+	int do_query_all=0;
+	int count;
+	u32 m;
+
+	/* Default one lock for all cpu's */
+	one_lock=1;
+	while ((c = getopt(argc, argv, "m:iqvhle:")) != EOF)
+		switch (c) {
+			case 'm':	/* Procedure mode. 1: phys 2: virt */
+				count=sscanf(optarg, "%x", &m);
+				if (count!=1 || (m!=1 && m!=2)) {
+					printf("Wrong mode number.\n");
+					help();
+					return -1;
+				}
+				mode=m;
+				break;
+			case 'i':	/* Inject errors */
+				do_err_inj=1;
+				break;
+			case 'q':	/* Query */
+				do_query_all=1;
+				break;
+			case 'v':	/* Verbose */
+				verbose=1;
+				break;
+			case 'l':	/* One lock per cpu */
+				one_lock=0;
+				break;
+			case 'e':	/* error arguments */
+				/* Take parameters:
+				 * #cpu, loop, interval, err_type_info, err_struct_info[, err_data_buffer]
+				 * err_data_buffer is optional. Recommend not to specify
+				 * err_data_buffer. Better to use tool to generate it.
+				 */
+				count=sscanf(optarg,
+					"%lx, %lx, %lx, %lx, %lx, %lx, %lx, %lx\n",
+					&line_para.cpu,
+					&line_para.loop,
+					&line_para.interval,
+					&line_para.err_type_info,
+					&line_para.err_struct_info,
+					&line_para.err_data_buffer[0],
+					&line_para.err_data_buffer[1],
+					&line_para.err_data_buffer[2]);
+				if (count!=PARA_FIELD_NUM+3) {
+				    line_para.err_data_buffer[0]=-1,
+				    line_para.err_data_buffer[1]=-1,
+				    line_para.err_data_buffer[2]=-1;
+				    count=sscanf(optarg, "%lx, %lx, %lx, %lx, %lx\n",
+						&line_para.cpu,
+						&line_para.loop,
+						&line_para.interval,
+						&line_para.err_type_info,
+						&line_para.err_struct_info);
+				    if (count!=PARA_FIELD_NUM) {
+					printf("Wrong error arguments.\n");
+					help();
+					return -1;
+				    }
+				}
+				para=1;
+				break;
+			continue;
+				break;
+			case 'h':
+				help();
+				return 0;
+			default:
+				break;
+		}
+
+	if (do_query_all)
+		query_all_capabilities();
+	if (do_err_inj)
+		err_inj();
+
+	if (!do_query_all &&  !do_err_inj)
+		help();
+
+	return 0;
+  }