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* 3.4.28-rt40 arm freescale imx35 pcm43
@ 2013-02-06 16:10 Tim Sander
  2013-02-06 16:43 ` Tim Sander
  0 siblings, 1 reply; 13+ messages in thread
From: Tim Sander @ 2013-02-06 16:10 UTC (permalink / raw)
  To: linux-rt-users

[-- Attachment #1: Type: text/plain, Size: 1694 bytes --]

Hi 

I am using a arm freescale imx35 pcm43 with preempt rt patched with some minor 
local modifications. When fuzzing the serial port set to 115200 with the 
attached programm the i.mx goes into endless interrupts on the mxc-avic  IMX-
uart. The strange thing is that the interrupt handler is not called anymore so 
that the receive buffer is not emptied and the level triggered interrupt 
persists. Switching to "Preemptible Kernel (Basic RT)" seems to mitigate the 
problem. At least i have not able to reproduce this behaviour with this 
configuration. So i guess it's a problem introduced by the "Fully Preemptible 
Kernel (RT)" option. When disabling the interrupt enable flag for the receive 
buffer  (UCR1->RRDYEN) in the hw debugger the system gets usable again.

I also noticed that (USR2->ORE) is set to error. Resetting it does not help.

I have tried to find the reason why the interrupt handler (imx_rxint) does not 
get called anymore.  But so far unsuccessful... But at least it seems that 
some errorhandling codepath which is hit by my atttached program creates this 
problem.

I also tried to disableing the error handling in the imx_rxint function but 
this didn't remove this error. Also when a breakpoint is set within the 
imx_rxint function the error also does not get triggered. So probably this 
error is some timing problem with the error code path for overrun or frame 
error handling?

I also have only able to trigger this error with a serial speed of the fuzzer 
with 57600 but not with 9600 or 115200.

Thanks
Tim

Also please note that the version of the kernel config is wrong as i changed it 
to make the hw debugger happy. The kernel is really a 3.4.28-rt40.

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #2: serialfuz.c --]
[-- Type: text/x-csrc; charset="UTF-8"; name="serialfuz.c", Size: 2844 bytes --]

#include <stdlib.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <termio.h>
#include <errno.h>
#include <fcntl.h>

struct termios ttysave,sersave;
int serfd,ttyfd;
void signal_handler(int sig) {
	if (tcsetattr(serfd,TCSANOW,&sersave)== -1) {
		perror("failed to restore serial settings");
		exit(2);
	}
	if (tcsetattr(ttyfd,TCSANOW,&ttysave)==-1) {
		perror("failed to restore terminal");
		exit(3);
	}
	exit(0);
}

int main(int argc,char* argv[]) {
  int i,buffer0=0;
  fd_set rfds;
  struct timeval timevalue;
  struct termios serbuf,ttybuf;
  FILE 	 *fd;
  ttyfd=fileno(stdin);
  fd=fopen("/dev/urandom","r");
  if(!fd) perror("Konnte log nicht öffnen");
  serfd=open(*argv[argc-1]!='1'?"/dev/ttyS0":"/dev/ttyS1",O_RDWR|O_NONBLOCK);
  //serfd=open("/dev/ttyUSB0",O_RDWR|O_NONBLOCK);
  if (serfd<0) {
          perror("opening serial port");
          exit(1);
  }
  if (tcgetattr(serfd,&sersave)== -1) {
        perror("getting serial_settings");
        exit(1);
  }     
  if (tcgetattr(ttyfd,&ttysave)==-1) {
	  perror("getting terminal settings");
	  exit(4);
  }
  for (i=1;i<20;i++) {
        signal(i,(void (*)(int))signal_handler);
  }
  ttybuf=ttysave;
  serbuf=sersave;
  cfmakeraw(&serbuf);
  serbuf.c_cc[VMIN]=0;
  serbuf.c_cc[VTIME]=2;
  if (cfsetospeed(&serbuf,B57600)==-1) perror("setting serial speed to 57600");
  if (tcsetattr(serfd,TCSANOW,&serbuf)==-1) {
        perror("makeing serial line raw");
        exit(1);
  };
  cfmakeraw(&ttybuf);
  if (tcsetattr(ttyfd,TCSANOW,&ttybuf)==-1) {
	  perror("making terminal raw");
	  exit(1);
  };
  for(i=0; i<10000000;i++) {
	  fread(&buffer0,1,1,fd);
	  write(serfd,&buffer0,1);
	  //printf("written:%i",write(serfd,&buffer0,1));
  }
  /*
  while (1) {
  	  timevalue.tv_sec=5;
          timevalue.tv_usec=0;
  	  FD_ZERO(&rfds);
	  FD_SET(serfd, &rfds);
	  FD_SET(ttyfd, &rfds);
	  select(serfd+1,&rfds,NULL,NULL,&timevalue);
	  if (FD_ISSET(serfd,&rfds)) {
	  	i=read(serfd,&buffer0,1);
		  if (i) {
			  i=0;
			  //printf("received: %x %i\r\n",buffer0,buffer0);
			  fprintf(stderr,"%c",buffer0);
			  //i=fwrite(&buffer0,1,1,fd);
			  //printf("writen: %i\n",i);
        	  }
	  }
	  if (FD_ISSET(ttyfd,&rfds)) {
		i=read(ttyfd,&buffer0,1);
		if (i) {
			  i=0;
			  if (buffer0==17) break;
			  else {
				  i=write(serfd,&buffer0,1);
				  // if (i) fprintf(stderr,"%i",buffer0);
				  //else {i=0;printf("Send failed: %i\r\n",buffer0);}
			 }
		}
	}
  }
  */
  if (tcsetattr(serfd,TCSANOW,&sersave)== -1) {
	perror("failed to restore serial settings");
	exit(2);
  }		
  if (tcsetattr(ttyfd,TCSANOW,&ttysave)== -1) {
	perror("failed to restore terminal settings");
	exit(2);
  }		
  fclose(fd);
  return 0;
}

[-- Attachment #3: kernelconfig --]
[-- Type: text/plain, Size: 49714 bytes --]

#
# Automatically generated file; DO NOT EDIT.
# Linux/arm 2.6.42pmx Kernel Configuration
#
CONFIG_ARM=y
CONFIG_SYS_SUPPORTS_APM_EMULATION=y
CONFIG_GENERIC_GPIO=y
# CONFIG_ARCH_USES_GETTIMEOFFSET is not set
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_KTIME_SCALAR=y
CONFIG_HAVE_PROC_CPU=y
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_HAVE_LATENCYTOP_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_HARDIRQS_SW_RESEND=y
CONFIG_GENERIC_IRQ_PROBE=y
CONFIG_RWSEM_GENERIC_SPINLOCK=y
CONFIG_ARCH_HAS_CPU_IDLE_WAIT=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_GENERIC_CALIBRATE_DELAY=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_VECTORS_BASE=0xffff0000
CONFIG_ARM_PATCH_PHYS_VIRT=y
CONFIG_GENERIC_BUG=y
CONFIG_DEFCONFIG_LIST="/lib/modules/$UNAME_RELEASE/.config"
CONFIG_HAVE_IRQ_WORK=y

#
# General setup
#
CONFIG_EXPERIMENTAL=y
CONFIG_BROKEN_ON_SMP=y
CONFIG_INIT_ENV_ARG_LIMIT=32
CONFIG_CROSS_COMPILE=""
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_HAVE_KERNEL_LZMA=y
CONFIG_HAVE_KERNEL_XZ=y
CONFIG_HAVE_KERNEL_LZO=y
# CONFIG_KERNEL_GZIP is not set
# CONFIG_KERNEL_LZMA is not set
# CONFIG_KERNEL_XZ is not set
CONFIG_KERNEL_LZO=y
CONFIG_DEFAULT_HOSTNAME="(none)"
# CONFIG_SWAP is not set
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
# CONFIG_BSD_PROCESS_ACCT is not set
# CONFIG_FHANDLE is not set
# CONFIG_TASKSTATS is not set
# CONFIG_AUDIT is not set
CONFIG_HAVE_GENERIC_HARDIRQS=y

#
# IRQ subsystem
#
CONFIG_GENERIC_HARDIRQS=y
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_CHIP=y
CONFIG_IRQ_FORCED_THREADING=y

#
# RCU Subsystem
#
CONFIG_TINY_PREEMPT_RCU=y
CONFIG_PREEMPT_RCU=y
# CONFIG_TREE_RCU_TRACE is not set
CONFIG_RCU_BOOST=y
CONFIG_RCU_BOOST_PRIO=1
CONFIG_RCU_BOOST_DELAY=50
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=14
# CONFIG_CGROUPS is not set
# CONFIG_CHECKPOINT_RESTORE is not set
# CONFIG_NAMESPACES is not set
# CONFIG_SCHED_AUTOGROUP is not set
CONFIG_SYSFS_DEPRECATED=y
CONFIG_SYSFS_DEPRECATED_V2=y
# CONFIG_RELAY is not set
# CONFIG_BLK_DEV_INITRD is not set
CONFIG_CC_OPTIMIZE_FOR_SIZE=y
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
CONFIG_EXPERT=y
CONFIG_UID16=y
CONFIG_SYSCTL_SYSCALL=y
# CONFIG_KALLSYMS is not set
CONFIG_HOTPLUG=y
CONFIG_PRINTK=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_EMBEDDED=y
CONFIG_HAVE_PERF_EVENTS=y
CONFIG_PERF_USE_VMALLOC=y

#
# Kernel Performance Events And Counters
#
# CONFIG_PERF_EVENTS is not set
# CONFIG_PERF_COUNTERS is not set
CONFIG_VM_EVENT_COUNTERS=y
CONFIG_COMPAT_BRK=y
CONFIG_SLAB=y
# CONFIG_PROFILING is not set
CONFIG_HAVE_OPROFILE=y
# CONFIG_KPROBES is not set
CONFIG_JUMP_LABEL=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_CLK=y
CONFIG_HAVE_DMA_API_DEBUG=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y

#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
CONFIG_HAVE_GENERIC_DMA_COHERENT=y
CONFIG_SLABINFO=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
CONFIG_MODULE_FORCE_LOAD=y
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
CONFIG_BLOCK=y
# CONFIG_LBDAF is not set
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_BLK_DEV_BSGLIB is not set
# CONFIG_BLK_DEV_INTEGRITY is not set

#
# Partition Types
#
# CONFIG_PARTITION_ADVANCED is not set
CONFIG_MSDOS_PARTITION=y

#
# IO Schedulers
#
CONFIG_IOSCHED_NOOP=y
# CONFIG_IOSCHED_DEADLINE is not set
# CONFIG_IOSCHED_CFQ is not set
CONFIG_DEFAULT_NOOP=y
CONFIG_DEFAULT_IOSCHED="noop"
# CONFIG_INLINE_SPIN_TRYLOCK is not set
# CONFIG_INLINE_SPIN_TRYLOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK is not set
# CONFIG_INLINE_SPIN_LOCK_BH is not set
# CONFIG_INLINE_SPIN_LOCK_IRQ is not set
# CONFIG_INLINE_SPIN_LOCK_IRQSAVE is not set
# CONFIG_INLINE_SPIN_UNLOCK_BH is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQ is not set
# CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_READ_TRYLOCK is not set
# CONFIG_INLINE_READ_LOCK is not set
# CONFIG_INLINE_READ_LOCK_BH is not set
# CONFIG_INLINE_READ_LOCK_IRQ is not set
# CONFIG_INLINE_READ_LOCK_IRQSAVE is not set
# CONFIG_INLINE_READ_UNLOCK is not set
# CONFIG_INLINE_READ_UNLOCK_BH is not set
# CONFIG_INLINE_READ_UNLOCK_IRQ is not set
# CONFIG_INLINE_READ_UNLOCK_IRQRESTORE is not set
# CONFIG_INLINE_WRITE_TRYLOCK is not set
# CONFIG_INLINE_WRITE_LOCK is not set
# CONFIG_INLINE_WRITE_LOCK_BH is not set
# CONFIG_INLINE_WRITE_LOCK_IRQ is not set
# CONFIG_INLINE_WRITE_LOCK_IRQSAVE is not set
# CONFIG_INLINE_WRITE_UNLOCK is not set
# CONFIG_INLINE_WRITE_UNLOCK_BH is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQ is not set
# CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE is not set
# CONFIG_MUTEX_SPIN_ON_OWNER is not set
# CONFIG_FREEZER is not set

#
# System Type
#
CONFIG_MMU=y
# CONFIG_ARCH_INTEGRATOR is not set
# CONFIG_ARCH_REALVIEW is not set
# CONFIG_ARCH_VERSATILE is not set
# CONFIG_ARCH_VEXPRESS is not set
# CONFIG_ARCH_AT91 is not set
# CONFIG_ARCH_BCMRING is not set
# CONFIG_ARCH_HIGHBANK is not set
# CONFIG_ARCH_CLPS711X is not set
# CONFIG_ARCH_CNS3XXX is not set
# CONFIG_ARCH_GEMINI is not set
# CONFIG_ARCH_PRIMA2 is not set
# CONFIG_ARCH_EBSA110 is not set
# CONFIG_ARCH_EP93XX is not set
# CONFIG_ARCH_FOOTBRIDGE is not set
CONFIG_ARCH_MXC=y
# CONFIG_ARCH_MXS is not set
# CONFIG_ARCH_NETX is not set
# CONFIG_ARCH_H720X is not set
# CONFIG_ARCH_IOP13XX is not set
# CONFIG_ARCH_IOP32X is not set
# CONFIG_ARCH_IOP33X is not set
# CONFIG_ARCH_IXP23XX is not set
# CONFIG_ARCH_IXP2000 is not set
# CONFIG_ARCH_IXP4XX is not set
# CONFIG_ARCH_DOVE is not set
# CONFIG_ARCH_KIRKWOOD is not set
# CONFIG_ARCH_LPC32XX is not set
# CONFIG_ARCH_MV78XX0 is not set
# CONFIG_ARCH_ORION5X is not set
# CONFIG_ARCH_MMP is not set
# CONFIG_ARCH_KS8695 is not set
# CONFIG_ARCH_W90X900 is not set
# CONFIG_ARCH_TEGRA is not set
# CONFIG_ARCH_PICOXCELL is not set
# CONFIG_ARCH_PNX4008 is not set
# CONFIG_ARCH_PXA is not set
# CONFIG_ARCH_MSM is not set
# CONFIG_ARCH_SHMOBILE is not set
# CONFIG_ARCH_RPC is not set
# CONFIG_ARCH_SA1100 is not set
# CONFIG_ARCH_S3C24XX is not set
# CONFIG_ARCH_S3C64XX is not set
# CONFIG_ARCH_S5P64X0 is not set
# CONFIG_ARCH_S5PC100 is not set
# CONFIG_ARCH_S5PV210 is not set
# CONFIG_ARCH_EXYNOS is not set
# CONFIG_ARCH_SHARK is not set
# CONFIG_ARCH_U300 is not set
# CONFIG_ARCH_U8500 is not set
# CONFIG_ARCH_NOMADIK is not set
# CONFIG_ARCH_DAVINCI is not set
# CONFIG_ARCH_OMAP is not set
# CONFIG_PLAT_SPEAR is not set
# CONFIG_ARCH_VT8500 is not set
# CONFIG_ARCH_ZYNQ is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_KEYBOARD_GPIO_POLLED is not set
CONFIG_IMX_HAVE_PLATFORM_FEC=y
CONFIG_IMX_HAVE_PLATFORM_FLEXCAN=y
CONFIG_IMX_HAVE_PLATFORM_FSL_USB2_UDC=y
CONFIG_IMX_HAVE_PLATFORM_IMX2_WDT=y
CONFIG_IMX_HAVE_PLATFORM_IMX_I2C=y
CONFIG_IMX_HAVE_PLATFORM_IMX_SSI=y
CONFIG_IMX_HAVE_PLATFORM_IMX_UART=y
CONFIG_IMX_HAVE_PLATFORM_IPU_CORE=y
CONFIG_IMX_HAVE_PLATFORM_MXC_EHCI=y
CONFIG_IMX_HAVE_PLATFORM_MXC_NAND=y
CONFIG_IMX_HAVE_PLATFORM_SDHCI_ESDHC_IMX=y
CONFIG_IMX_HAVE_PLATFORM_SPI_IMX=y

#
# Freescale MXC Implementations
#
# CONFIG_ARCH_IMX_V4_V5 is not set
CONFIG_ARCH_IMX_V6_V7=y
CONFIG_SOC_IMX35=y

#
# MX31 platforms:
#
# CONFIG_MACH_MX31ADS is not set
# CONFIG_MACH_MX31LILLY is not set
# CONFIG_MACH_MX31LITE is not set
# CONFIG_MACH_PCM037 is not set
# CONFIG_MACH_MX31_3DS is not set
# CONFIG_MACH_MX31MOBOARD is not set
# CONFIG_MACH_QONG is not set
# CONFIG_MACH_ARMADILLO5X0 is not set
# CONFIG_MACH_KZM_ARM11_01 is not set
# CONFIG_MACH_BUG is not set

#
# MX35 platforms:
#
CONFIG_MACH_PCM043=y
# CONFIG_MACH_MX35_3DS is not set
# CONFIG_MACH_EUKREA_CPUIMX35SD is not set
# CONFIG_MACH_VPR200 is not set

#
# i.MX5 platforms:
#

#
# i.MX51 machines:
#
# CONFIG_MACH_IMX51_DT is not set
# CONFIG_MACH_MX51_BABBAGE is not set
# CONFIG_MACH_MX51_3DS is not set
# CONFIG_MACH_EUKREA_CPUIMX51 is not set
# CONFIG_MACH_EUKREA_CPUIMX51SD is not set
# CONFIG_MACH_MX51_EFIKAMX is not set
# CONFIG_MACH_MX51_EFIKASB is not set

#
# i.MX53 machines:
#
# CONFIG_MACH_IMX53_DT is not set
# CONFIG_MACH_MX53_EVK is not set
# CONFIG_MACH_MX53_SMD is not set
# CONFIG_MACH_MX53_LOCO is not set
# CONFIG_MACH_MX53_ARD is not set

#
# i.MX6 family:
#
# CONFIG_SOC_IMX6Q is not set
CONFIG_MXC_IRQ_PRIOR=y
CONFIG_MXC_AVIC=y
# CONFIG_MXC_PWM is not set
# CONFIG_MXC_DEBUG_BOARD is not set
CONFIG_HAVE_EPIT=y
# CONFIG_MXC_USE_EPIT is not set
CONFIG_MXC_ULPI=y
CONFIG_ARCH_MXC_IOMUX_V3=y

#
# System MMU
#

#
# Processor Type
#
CONFIG_CPU_V6=y
CONFIG_CPU_32v6=y
CONFIG_CPU_ABRT_EV6=y
CONFIG_CPU_PABRT_V6=y
CONFIG_CPU_CACHE_V6=y
CONFIG_CPU_CACHE_VIPT=y
CONFIG_CPU_COPY_V6=y
CONFIG_CPU_TLB_V6=y
CONFIG_CPU_HAS_ASID=y
CONFIG_CPU_CP15=y
CONFIG_CPU_CP15_MMU=y
CONFIG_CPU_USE_DOMAINS=y

#
# Processor Features
#
# CONFIG_ARCH_PHYS_ADDR_T_64BIT is not set
CONFIG_ARM_THUMB=y
# CONFIG_CPU_ICACHE_DISABLE is not set
# CONFIG_CPU_DCACHE_DISABLE is not set
# CONFIG_CPU_BPREDICT_DISABLE is not set
CONFIG_OUTER_CACHE=y
CONFIG_OUTER_CACHE_SYNC=y
CONFIG_MIGHT_HAVE_CACHE_L2X0=y
CONFIG_CACHE_L2X0=y
CONFIG_ARM_L1_CACHE_SHIFT=5
CONFIG_ARM_DMA_MEM_BUFFERABLE=y
CONFIG_ARM_NR_BANKS=8
CONFIG_CPU_HAS_PMU=y
CONFIG_MULTI_IRQ_HANDLER=y
# CONFIG_ARM_ERRATA_326103 is not set
# CONFIG_ARM_ERRATA_411920 is not set
# CONFIG_PL310_ERRATA_588369 is not set
# CONFIG_PL310_ERRATA_727915 is not set
# CONFIG_ARM_ERRATA_364296 is not set
# CONFIG_PL310_ERRATA_769419 is not set

#
# Bus support
#
# CONFIG_PCI_SYSCALL is not set
# CONFIG_ARCH_SUPPORTS_MSI is not set
# CONFIG_PCCARD is not set

#
# Kernel Features
#
# CONFIG_NO_HZ is not set
# CONFIG_HIGH_RES_TIMERS is not set
CONFIG_GENERIC_CLOCKEVENTS_BUILD=y
CONFIG_VMSPLIT_3G=y
# CONFIG_VMSPLIT_2G is not set
# CONFIG_VMSPLIT_1G is not set
CONFIG_PAGE_OFFSET=0xC0000000
CONFIG_ARCH_NR_GPIO=0
CONFIG_PREEMPT=y
CONFIG_PREEMPT_RT_BASE=y
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT__LL is not set
# CONFIG_PREEMPT_RTB is not set
CONFIG_PREEMPT_RT_FULL=y
CONFIG_PREEMPT_COUNT=y
CONFIG_HZ=300
CONFIG_AEABI=y
# CONFIG_OABI_COMPAT is not set
# CONFIG_ARCH_SPARSEMEM_DEFAULT is not set
# CONFIG_ARCH_SELECT_MEMORY_MODEL is not set
CONFIG_HAVE_ARCH_PFN_VALID=y
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_HAVE_MEMBLOCK=y
CONFIG_PAGEFLAGS_EXTENDED=y
CONFIG_SPLIT_PTLOCK_CPUS=4
# CONFIG_COMPACTION is not set
# CONFIG_PHYS_ADDR_T_64BIT is not set
CONFIG_ZONE_DMA_FLAG=0
CONFIG_VIRT_TO_BUS=y
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
CONFIG_NEED_PER_CPU_KM=y
# CONFIG_CLEANCACHE is not set
CONFIG_FORCE_MAX_ZONEORDER=11
CONFIG_ALIGNMENT_TRAP=y
# CONFIG_UACCESS_WITH_MEMCPY is not set
# CONFIG_SECCOMP is not set
# CONFIG_CC_STACKPROTECTOR is not set
# CONFIG_DEPRECATED_PARAM_STRUCT is not set

#
# Boot options
#
# CONFIG_USE_OF is not set
CONFIG_ZBOOT_ROM_TEXT=0x0
CONFIG_ZBOOT_ROM_BSS=0x0
CONFIG_CMDLINE="console=ttymxc0,115200 init=/usr/sbin/init lpj=2654208 quiet ip=none ubi.mtd=3 root=ubi0:root rootfstype=ubifs mtdparts=physmap-flash.0:256k(barebox)ro,128k(env),2M(kernel),-(rootfs);mxc_nand:-(data)"
CONFIG_CMDLINE_FROM_BOOTLOADER=y
# CONFIG_CMDLINE_EXTEND is not set
# CONFIG_CMDLINE_FORCE is not set
# CONFIG_XIP_KERNEL is not set
CONFIG_KEXEC=y
CONFIG_ATAGS_PROC=y
# CONFIG_CRASH_DUMP is not set
CONFIG_AUTO_ZRELADDR=y

#
# CPU Power Management
#
# CONFIG_CPU_IDLE is not set

#
# Floating point emulation
#

#
# At least one emulation must be selected
#
CONFIG_VFP=y

#
# Userspace binary formats
#
CONFIG_BINFMT_ELF=y
CONFIG_ARCH_BINFMT_ELF_RANDOMIZE_PIE=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
CONFIG_HAVE_AOUT=y
# CONFIG_BINFMT_AOUT is not set
# CONFIG_BINFMT_MISC is not set

#
# Power management options
#
# CONFIG_SUSPEND is not set
# CONFIG_PM_RUNTIME is not set
CONFIG_ARCH_SUSPEND_POSSIBLE=y
# CONFIG_ARM_CPU_SUSPEND is not set
CONFIG_NET=y

#
# Networking options
#
CONFIG_PACKET=m
CONFIG_UNIX=y
# CONFIG_UNIX_DIAG is not set
CONFIG_XFRM=y
# CONFIG_XFRM_USER is not set
# CONFIG_XFRM_SUB_POLICY is not set
# CONFIG_XFRM_MIGRATE is not set
# CONFIG_XFRM_STATISTICS is not set
# CONFIG_NET_KEY is not set
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
# CONFIG_IP_ADVANCED_ROUTER is not set
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
# CONFIG_IP_PNP_BOOTP is not set
# CONFIG_IP_PNP_RARP is not set
# CONFIG_NET_IPIP is not set
# CONFIG_NET_IPGRE_DEMUX is not set
# CONFIG_IP_MROUTE is not set
# CONFIG_ARPD is not set
# CONFIG_SYN_COOKIES is not set
# CONFIG_INET_AH is not set
# CONFIG_INET_ESP is not set
# CONFIG_INET_IPCOMP is not set
# CONFIG_INET_XFRM_TUNNEL is not set
CONFIG_INET_TUNNEL=m
# CONFIG_INET_XFRM_MODE_TRANSPORT is not set
# CONFIG_INET_XFRM_MODE_TUNNEL is not set
# CONFIG_INET_XFRM_MODE_BEET is not set
# CONFIG_INET_LRO is not set
CONFIG_INET_DIAG=m
CONFIG_INET_TCP_DIAG=m
# CONFIG_INET_UDP_DIAG is not set
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
CONFIG_IPV6=m
# CONFIG_IPV6_PRIVACY is not set
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
# CONFIG_INET6_IPCOMP is not set
# CONFIG_IPV6_MIP6 is not set
# CONFIG_INET6_XFRM_TUNNEL is not set
# CONFIG_INET6_TUNNEL is not set
CONFIG_INET6_XFRM_MODE_TRANSPORT=m
CONFIG_INET6_XFRM_MODE_TUNNEL=m
CONFIG_INET6_XFRM_MODE_BEET=m
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
CONFIG_IPV6_SIT=m
# CONFIG_IPV6_SIT_6RD is not set
CONFIG_IPV6_NDISC_NODETYPE=y
# CONFIG_IPV6_TUNNEL is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_IPV6_MROUTE is not set
# CONFIG_NETWORK_SECMARK is not set
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
# CONFIG_NETFILTER is not set
# CONFIG_IP_DCCP is not set
# CONFIG_IP_SCTP is not set
# CONFIG_RDS is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
# CONFIG_BRIDGE is not set
# CONFIG_NET_DSA is not set
# CONFIG_VLAN_8021Q is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_IPX is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_ECONET is not set
# CONFIG_WAN_ROUTER is not set
# CONFIG_PHONET is not set
# CONFIG_IEEE802154 is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set
# CONFIG_BATMAN_ADV is not set
# CONFIG_OPENVSWITCH is not set
CONFIG_BQL=y
CONFIG_HAVE_BPF_JIT=y
# CONFIG_BPF_JIT is not set

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_HAMRADIO is not set
CONFIG_CAN=y
CONFIG_CAN_RAW=y
CONFIG_CAN_BCM=y
# CONFIG_CAN_GW is not set

#
# CAN Device Drivers
#
# CONFIG_CAN_VCAN is not set
# CONFIG_CAN_SLCAN is not set
CONFIG_CAN_DEV=y
CONFIG_CAN_CALC_BITTIMING=y
# CONFIG_CAN_MCP251X is not set
CONFIG_HAVE_CAN_FLEXCAN=y
CONFIG_CAN_FLEXCAN=y
# CONFIG_CAN_SJA1000 is not set
# CONFIG_CAN_C_CAN is not set
# CONFIG_CAN_CC770 is not set

#
# CAN USB interfaces
#
# CONFIG_CAN_EMS_USB is not set
# CONFIG_CAN_ESD_USB2 is not set
# CONFIG_CAN_PEAK_USB is not set
# CONFIG_CAN_SOFTING is not set
# CONFIG_CAN_DEBUG_DEVICES is not set
# CONFIG_IRDA is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_WIRELESS is not set
# CONFIG_WIMAX is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set
# CONFIG_NFC is not set

#
# Device Drivers
#

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y
CONFIG_FW_LOADER=y
# CONFIG_FIRMWARE_IN_KERNEL is not set
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_SYS_HYPERVISOR is not set
# CONFIG_GENERIC_CPU_DEVICES is not set
# CONFIG_DMA_SHARED_BUFFER is not set
# CONFIG_CONNECTOR is not set
CONFIG_MTD=y
# CONFIG_MTD_TESTS is not set
# CONFIG_MTD_REDBOOT_PARTS is not set
CONFIG_MTD_CMDLINE_PARTS=y
# CONFIG_MTD_AFS_PARTS is not set
# CONFIG_MTD_AR7_PARTS is not set

#
# User Modules And Translation Layers
#
CONFIG_MTD_CHAR=y
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set
# CONFIG_RFD_FTL is not set
# CONFIG_SSFDC is not set
# CONFIG_SM_FTL is not set
# CONFIG_MTD_OOPS is not set

#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
# CONFIG_MTD_JEDECPROBE is not set
CONFIG_MTD_GEN_PROBE=y
# CONFIG_MTD_CFI_ADV_OPTIONS is not set
CONFIG_MTD_MAP_BANK_WIDTH_1=y
CONFIG_MTD_MAP_BANK_WIDTH_2=y
CONFIG_MTD_MAP_BANK_WIDTH_4=y
# CONFIG_MTD_MAP_BANK_WIDTH_8 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_16 is not set
# CONFIG_MTD_MAP_BANK_WIDTH_32 is not set
CONFIG_MTD_CFI_I1=y
CONFIG_MTD_CFI_I2=y
# CONFIG_MTD_CFI_I4 is not set
# CONFIG_MTD_CFI_I8 is not set
CONFIG_MTD_CFI_INTELEXT=y
# CONFIG_MTD_CFI_AMDSTD is not set
# CONFIG_MTD_CFI_STAA is not set
CONFIG_MTD_CFI_UTIL=y
CONFIG_MTD_RAM=m
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
CONFIG_MTD_PHYSMAP=y
# CONFIG_MTD_PHYSMAP_COMPAT is not set
CONFIG_MTD_PLATRAM=m

#
# Self-contained MTD device drivers
#
# CONFIG_MTD_DATAFLASH is not set
# CONFIG_MTD_M25P80 is not set
# CONFIG_MTD_SST25L is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_PHRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLOCK2MTD is not set

#
# Disk-On-Chip Device Drivers
#
# CONFIG_MTD_DOC2000 is not set
# CONFIG_MTD_DOC2001 is not set
# CONFIG_MTD_DOC2001PLUS is not set
# CONFIG_MTD_DOCG3 is not set
CONFIG_MTD_NAND_ECC=m
# CONFIG_MTD_NAND_ECC_SMC is not set
CONFIG_MTD_NAND=m
# CONFIG_MTD_NAND_VERIFY_WRITE is not set
# CONFIG_MTD_NAND_ECC_BCH is not set
# CONFIG_MTD_SM_COMMON is not set
# CONFIG_MTD_NAND_MUSEUM_IDS is not set
# CONFIG_MTD_NAND_GPIO is not set
CONFIG_MTD_NAND_IDS=m
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_DOCG4 is not set
# CONFIG_MTD_NAND_NANDSIM is not set
# CONFIG_MTD_NAND_PLATFORM is not set
# CONFIG_MTD_ALAUDA is not set
CONFIG_MTD_NAND_MXC=m
# CONFIG_MTD_ONENAND is not set

#
# LPDDR flash memory drivers
#
# CONFIG_MTD_LPDDR is not set
CONFIG_MTD_UBI=y
CONFIG_MTD_UBI_WL_THRESHOLD=4096
CONFIG_MTD_UBI_BEB_RESERVE=1
# CONFIG_MTD_UBI_GLUEBI is not set
# CONFIG_MTD_UBI_DEBUG is not set
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_COW_COMMON is not set
CONFIG_BLK_DEV_LOOP=m
CONFIG_BLK_DEV_LOOP_MIN_COUNT=1
# CONFIG_BLK_DEV_CRYPTOLOOP is not set

#
# DRBD disabled because PROC_FS, INET or CONNECTOR not selected
#
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_UB is not set
# CONFIG_BLK_DEV_RAM is not set
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_MG_DISK is not set
# CONFIG_BLK_DEV_RBD is not set

#
# Misc devices
#
# CONFIG_SENSORS_LIS3LV02D is not set
# CONFIG_AD525X_DPOT is not set
# CONFIG_ATMEL_PWM is not set
# CONFIG_ICS932S401 is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_APDS9802ALS is not set
# CONFIG_ISL29003 is not set
# CONFIG_ISL29020 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_SENSORS_BH1780 is not set
# CONFIG_SENSORS_BH1770 is not set
# CONFIG_SENSORS_APDS990X is not set
# CONFIG_HMC6352 is not set
# CONFIG_DS1682 is not set
# CONFIG_TI_DAC7512 is not set
# CONFIG_BMP085 is not set
# CONFIG_USB_SWITCH_FSA9480 is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
CONFIG_EEPROM_AT24=y
# CONFIG_EEPROM_AT25 is not set
# CONFIG_EEPROM_LEGACY is not set
# CONFIG_EEPROM_MAX6875 is not set
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_EEPROM_93XX46 is not set

#
# Texas Instruments shared transport line discipline
#
# CONFIG_TI_ST is not set
# CONFIG_SENSORS_LIS3_SPI is not set
# CONFIG_SENSORS_LIS3_I2C is not set

#
# Altera FPGA firmware download module
#
# CONFIG_ALTERA_STAPL is not set

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
# CONFIG_SCSI_TGT is not set
# CONFIG_SCSI_NETLINK is not set
# CONFIG_SCSI_PROC_FS is not set

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
# CONFIG_CHR_DEV_ST is not set
# CONFIG_CHR_DEV_OSST is not set
# CONFIG_BLK_DEV_SR is not set
# CONFIG_CHR_DEV_SG is not set
# CONFIG_CHR_DEV_SCH is not set
CONFIG_SCSI_MULTI_LUN=y
CONFIG_SCSI_CONSTANTS=y
CONFIG_SCSI_LOGGING=y
CONFIG_SCSI_SCAN_ASYNC=y
CONFIG_SCSI_WAIT_SCAN=m

#
# SCSI Transports
#
# CONFIG_SCSI_SPI_ATTRS is not set
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
# CONFIG_SCSI_LOWLEVEL is not set
# CONFIG_SCSI_DH is not set
# CONFIG_SCSI_OSD_INITIATOR is not set
# CONFIG_ATA is not set
# CONFIG_MD is not set
# CONFIG_TARGET_CORE is not set
CONFIG_NETDEVICES=y
CONFIG_NET_CORE=y
# CONFIG_BONDING is not set
# CONFIG_DUMMY is not set
# CONFIG_EQUALIZER is not set
# CONFIG_MII is not set
# CONFIG_NET_TEAM is not set
# CONFIG_MACVLAN is not set
# CONFIG_NETPOLL is not set
# CONFIG_NET_POLL_CONTROLLER is not set
# CONFIG_TUN is not set
# CONFIG_VETH is not set

#
# CAIF transport drivers
#
CONFIG_ETHERNET=y
# CONFIG_NET_VENDOR_BROADCOM is not set
# CONFIG_NET_CALXEDA_XGMAC is not set
# CONFIG_NET_VENDOR_CHELSIO is not set
# CONFIG_NET_VENDOR_CIRRUS is not set
# CONFIG_DM9000 is not set
# CONFIG_DNET is not set
# CONFIG_NET_VENDOR_FARADAY is not set
CONFIG_NET_VENDOR_FREESCALE=y
CONFIG_FEC=y
# CONFIG_NET_VENDOR_INTEL is not set
# CONFIG_NET_VENDOR_MARVELL is not set
# CONFIG_NET_VENDOR_MICREL is not set
# CONFIG_NET_VENDOR_MICROCHIP is not set
# CONFIG_NET_VENDOR_NATSEMI is not set
# CONFIG_ETHOC is not set
# CONFIG_NET_VENDOR_SEEQ is not set
# CONFIG_NET_VENDOR_SMSC is not set
# CONFIG_NET_VENDOR_STMICRO is not set
CONFIG_PHYLIB=y

#
# MII PHY device drivers
#
# CONFIG_AMD_PHY is not set
# CONFIG_MARVELL_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_QSEMI_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_VITESSE_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_ICPLUS_PHY is not set
# CONFIG_REALTEK_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_STE10XP is not set
# CONFIG_LSI_ET1011C_PHY is not set
CONFIG_MICREL_PHY=y
# CONFIG_FIXED_PHY is not set
# CONFIG_MDIO_BITBANG is not set
# CONFIG_MICREL_KS8995MA is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set

#
# USB Network Adapters
#
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_USBNET is not set
# CONFIG_USB_IPHETH is not set
# CONFIG_WLAN is not set

#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#
# CONFIG_WAN is not set
# CONFIG_ISDN is not set

#
# Input device support
#
CONFIG_INPUT=m
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_POLLDEV is not set
CONFIG_INPUT_SPARSEKMAP=m

#
# Userland interfaces
#
CONFIG_INPUT_MOUSEDEV=m
CONFIG_INPUT_MOUSEDEV_PSAUX=y
CONFIG_INPUT_MOUSEDEV_SCREEN_X=1024
CONFIG_INPUT_MOUSEDEV_SCREEN_Y=768
CONFIG_INPUT_JOYDEV=m
CONFIG_INPUT_EVDEV=m
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
CONFIG_INPUT_KEYBOARD=y
# CONFIG_KEYBOARD_ADP5588 is not set
# CONFIG_KEYBOARD_ADP5589 is not set
CONFIG_KEYBOARD_ATKBD=m
# CONFIG_KEYBOARD_QT1070 is not set
# CONFIG_KEYBOARD_QT2160 is not set
# CONFIG_KEYBOARD_LKKBD is not set
# CONFIG_KEYBOARD_GPIO is not set
# CONFIG_KEYBOARD_TCA6416 is not set
# CONFIG_KEYBOARD_TCA8418 is not set
# CONFIG_KEYBOARD_MATRIX is not set
# CONFIG_KEYBOARD_LM8323 is not set
# CONFIG_KEYBOARD_MAX7359 is not set
# CONFIG_KEYBOARD_MCS is not set
# CONFIG_KEYBOARD_MPR121 is not set
# CONFIG_KEYBOARD_IMX is not set
# CONFIG_KEYBOARD_NEWTON is not set
# CONFIG_KEYBOARD_OPENCORES is not set
# CONFIG_KEYBOARD_SAMSUNG is not set
# CONFIG_KEYBOARD_STOWAWAY is not set
# CONFIG_KEYBOARD_SUNKBD is not set
# CONFIG_KEYBOARD_OMAP4 is not set
# CONFIG_KEYBOARD_XTKBD is not set
CONFIG_INPUT_MOUSE=y
CONFIG_MOUSE_PS2=m
CONFIG_MOUSE_PS2_ALPS=y
CONFIG_MOUSE_PS2_LOGIPS2PP=y
CONFIG_MOUSE_PS2_SYNAPTICS=y
CONFIG_MOUSE_PS2_TRACKPOINT=y
# CONFIG_MOUSE_PS2_ELANTECH is not set
# CONFIG_MOUSE_PS2_SENTELIC is not set
# CONFIG_MOUSE_PS2_TOUCHKIT is not set
# CONFIG_MOUSE_SERIAL is not set
# CONFIG_MOUSE_APPLETOUCH is not set
# CONFIG_MOUSE_BCM5974 is not set
# CONFIG_MOUSE_VSXXXAA is not set
# CONFIG_MOUSE_GPIO is not set
# CONFIG_MOUSE_SYNAPTICS_I2C is not set
# CONFIG_MOUSE_SYNAPTICS_USB is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=m
CONFIG_SERIO_SERPORT=m
CONFIG_SERIO_LIBPS2=m
# CONFIG_SERIO_RAW is not set
# CONFIG_SERIO_ALTERA_PS2 is not set
# CONFIG_SERIO_PS2MULT is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
# CONFIG_VT is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_DEVPTS_MULTIPLE_INSTANCES is not set
# CONFIG_LEGACY_PTYS is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_N_GSM is not set
# CONFIG_TRACE_SINK is not set
CONFIG_DEVKMEM=y

#
# Serial drivers
#
# CONFIG_SERIAL_8250 is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MAX3100 is not set
# CONFIG_SERIAL_MAX3107 is not set
CONFIG_SERIAL_IMX=y
CONFIG_SERIAL_IMX_CONSOLE=y
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_TIMBERDALE is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_IFX6X60 is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
CONFIG_TTY_PRINTK=y
# CONFIG_HVC_DCC is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
# CONFIG_R3964 is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_TCG_TPM is not set
# CONFIG_RAMOOPS is not set
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
# CONFIG_I2C_COMPAT is not set
CONFIG_I2C_CHARDEV=m
# CONFIG_I2C_MUX is not set
CONFIG_I2C_HELPER_AUTO=y

#
# I2C Hardware Bus support
#

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_DESIGNWARE_PLATFORM is not set
# CONFIG_I2C_GPIO is not set
CONFIG_I2C_IMX=m
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_PXA_PCI is not set
# CONFIG_I2C_SIMTEC is not set
# CONFIG_I2C_XILINX is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_STUB is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
CONFIG_SPI=y
# CONFIG_SPI_DEBUG is not set
CONFIG_SPI_MASTER=y

#
# SPI Master Controller Drivers
#
# CONFIG_SPI_ALTERA is not set
CONFIG_SPI_BITBANG=y
# CONFIG_SPI_GPIO is not set
CONFIG_SPI_IMX=y
# CONFIG_SPI_OC_TINY is not set
# CONFIG_SPI_PXA2XX_PCI is not set
# CONFIG_SPI_XILINX is not set
# CONFIG_SPI_DESIGNWARE is not set

#
# SPI Protocol Masters
#
CONFIG_SPI_SPIDEV=y
# CONFIG_SPI_TLE62X0 is not set
# CONFIG_HSI is not set

#
# PPS support
#
# CONFIG_PPS is not set

#
# PPS generators support
#

#
# PTP clock support
#

#
# Enable Device Drivers -> PPS to see the PTP clock options.
#
CONFIG_ARCH_REQUIRE_GPIOLIB=y
CONFIG_GPIOLIB=y
# CONFIG_DEBUG_GPIO is not set
CONFIG_GPIO_SYSFS=y
CONFIG_GPIO_GENERIC=y

#
# Memory mapped GPIO drivers:
#
# CONFIG_GPIO_GENERIC_PLATFORM is not set
CONFIG_GPIO_MXC=y

#
# I2C GPIO expanders:
#
# CONFIG_GPIO_MAX7300 is not set
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCF857X is not set
# CONFIG_GPIO_SX150X is not set
# CONFIG_GPIO_ADP5588 is not set

#
# PCI GPIO expanders:
#

#
# SPI GPIO expanders:
#
# CONFIG_GPIO_MAX7301 is not set
# CONFIG_GPIO_MCP23S08 is not set
# CONFIG_GPIO_MC33880 is not set
# CONFIG_GPIO_74X164 is not set

#
# AC97 GPIO expanders:
#

#
# MODULbus GPIO expanders:
#
CONFIG_W1=y

#
# 1-wire Bus Masters
#
# CONFIG_W1_MASTER_DS2490 is not set
# CONFIG_W1_MASTER_DS2482 is not set
CONFIG_W1_MASTER_MXC=y
# CONFIG_W1_MASTER_DS1WM is not set
# CONFIG_W1_MASTER_GPIO is not set

#
# 1-wire Slaves
#
CONFIG_W1_SLAVE_THERM=m
CONFIG_W1_SLAVE_SMEM=m
# CONFIG_W1_SLAVE_DS2408 is not set
# CONFIG_W1_SLAVE_DS2423 is not set
CONFIG_W1_SLAVE_DS2431=m
CONFIG_W1_SLAVE_DS2433=m
CONFIG_W1_SLAVE_DS2433_CRC=y
CONFIG_W1_SLAVE_DS2760=m
# CONFIG_W1_SLAVE_DS2780 is not set
# CONFIG_W1_SLAVE_DS2781 is not set
CONFIG_W1_SLAVE_BQ27000=m
# CONFIG_POWER_SUPPLY is not set
# CONFIG_HWMON is not set
# CONFIG_THERMAL is not set
CONFIG_WATCHDOG=y
# CONFIG_WATCHDOG_CORE is not set
# CONFIG_WATCHDOG_NOWAYOUT is not set

#
# Watchdog Device Drivers
#
# CONFIG_SOFT_WATCHDOG is not set
# CONFIG_DW_WATCHDOG is not set
# CONFIG_MAX63XX_WATCHDOG is not set
CONFIG_IMX2_WDT=y

#
# USB-based Watchdog Cards
#
# CONFIG_USBPCWATCHDOG is not set
CONFIG_SSB_POSSIBLE=y

#
# Sonics Silicon Backplane
#
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y

#
# Broadcom specific AMBA
#
# CONFIG_BCMA is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_CORE is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_ASIC3 is not set
# CONFIG_HTC_EGPIO is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_HTC_I2CPLD is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS65010 is not set
# CONFIG_TPS6507X is not set
# CONFIG_MFD_TPS65217 is not set
# CONFIG_MFD_TPS6586X is not set
# CONFIG_MFD_TPS65910 is not set
# CONFIG_MFD_TPS65912_I2C is not set
# CONFIG_MFD_TPS65912_SPI is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_TWL6040_CORE is not set
# CONFIG_MFD_STMPE is not set
# CONFIG_MFD_TC3589X is not set
# CONFIG_MFD_TMIO is not set
# CONFIG_MFD_T7L66XB is not set
# CONFIG_MFD_TC6387XB is not set
# CONFIG_MFD_TC6393XB is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_MFD_DA9052_SPI is not set
# CONFIG_MFD_DA9052_I2C is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_S5M_CORE is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM831X_SPI is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_MFD_MC13XXX is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_EZX_PCAP is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_MFD_TPS65090 is not set
# CONFIG_MFD_AAT2870_CORE is not set
# CONFIG_MFD_RC5T583 is not set
# CONFIG_REGULATOR is not set
# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_DRM is not set
# CONFIG_VGASTATE is not set
# CONFIG_VIDEO_OUTPUT_CONTROL is not set
# CONFIG_FB is not set
# CONFIG_EXYNOS_VIDEO is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set
# CONFIG_SOUND is not set
CONFIG_HID_SUPPORT=y
CONFIG_HID=m
CONFIG_HIDRAW=y

#
# USB Input Devices
#
CONFIG_USB_HID=m
# CONFIG_HID_PID is not set
# CONFIG_USB_HIDDEV is not set

#
# USB HID Boot Protocol drivers
#
# CONFIG_USB_KBD is not set
# CONFIG_USB_MOUSE is not set

#
# Special HID drivers
#
# CONFIG_HID_A4TECH is not set
# CONFIG_HID_ACRUX is not set
# CONFIG_HID_APPLE is not set
# CONFIG_HID_BELKIN is not set
# CONFIG_HID_CHERRY is not set
# CONFIG_HID_CHICONY is not set
# CONFIG_HID_CYPRESS is not set
# CONFIG_HID_DRAGONRISE is not set
# CONFIG_HID_EMS_FF is not set
# CONFIG_HID_EZKEY is not set
# CONFIG_HID_HOLTEK is not set
# CONFIG_HID_KEYTOUCH is not set
# CONFIG_HID_KYE is not set
# CONFIG_HID_UCLOGIC is not set
# CONFIG_HID_WALTOP is not set
# CONFIG_HID_GYRATION is not set
# CONFIG_HID_TWINHAN is not set
# CONFIG_HID_KENSINGTON is not set
# CONFIG_HID_LCPOWER is not set
# CONFIG_HID_LOGITECH is not set
# CONFIG_HID_MICROSOFT is not set
# CONFIG_HID_MONTEREY is not set
# CONFIG_HID_MULTITOUCH is not set
# CONFIG_HID_NTRIG is not set
# CONFIG_HID_ORTEK is not set
# CONFIG_HID_PANTHERLORD is not set
# CONFIG_HID_PETALYNX is not set
# CONFIG_HID_PICOLCD is not set
# CONFIG_HID_PRIMAX is not set
# CONFIG_HID_ROCCAT is not set
# CONFIG_HID_SAITEK is not set
# CONFIG_HID_SAMSUNG is not set
# CONFIG_HID_SONY is not set
# CONFIG_HID_SPEEDLINK is not set
# CONFIG_HID_SUNPLUS is not set
# CONFIG_HID_GREENASIA is not set
# CONFIG_HID_SMARTJOYPLUS is not set
# CONFIG_HID_TIVO is not set
# CONFIG_HID_TOPSEED is not set
# CONFIG_HID_THRUSTMASTER is not set
# CONFIG_HID_ZEROPLUS is not set
# CONFIG_HID_ZYDACRON is not set
# CONFIG_USB_ARCH_HAS_OHCI is not set
CONFIG_USB_ARCH_HAS_EHCI=y
# CONFIG_USB_ARCH_HAS_XHCI is not set
CONFIG_USB_SUPPORT=y
CONFIG_USB_COMMON=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB=y
CONFIG_USB_DEBUG=y
CONFIG_USB_ANNOUNCE_NEW_DEVICES=y

#
# Miscellaneous USB options
#
# CONFIG_USB_DEVICEFS is not set
# CONFIG_USB_DEVICE_CLASS is not set
CONFIG_USB_DYNAMIC_MINORS=y
# CONFIG_USB_OTG_WHITELIST is not set
# CONFIG_USB_OTG_BLACKLIST_HUB is not set
# CONFIG_USB_MON is not set
# CONFIG_USB_WUSB_CBAF is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_EHCI_MXC=y
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_ISP1760_HCD is not set
# CONFIG_USB_ISP1362_HCD is not set
# CONFIG_USB_EHCI_HCD_PLATFORM is not set
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_IMX21_HCD is not set

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#

#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_REALTEK is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
# CONFIG_USB_LIBUSUAL is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set

#
# USB port drivers
#
CONFIG_USB_SERIAL=m
# CONFIG_USB_EZUSB is not set
# CONFIG_USB_SERIAL_GENERIC is not set
# CONFIG_USB_SERIAL_AIRCABLE is not set
# CONFIG_USB_SERIAL_ARK3116 is not set
# CONFIG_USB_SERIAL_BELKIN is not set
# CONFIG_USB_SERIAL_CH341 is not set
# CONFIG_USB_SERIAL_WHITEHEAT is not set
# CONFIG_USB_SERIAL_DIGI_ACCELEPORT is not set
# CONFIG_USB_SERIAL_CP210X is not set
# CONFIG_USB_SERIAL_CYPRESS_M8 is not set
# CONFIG_USB_SERIAL_EMPEG is not set
# CONFIG_USB_SERIAL_FTDI_SIO is not set
# CONFIG_USB_SERIAL_FUNSOFT is not set
# CONFIG_USB_SERIAL_VISOR is not set
# CONFIG_USB_SERIAL_IPAQ is not set
# CONFIG_USB_SERIAL_IR is not set
# CONFIG_USB_SERIAL_EDGEPORT is not set
# CONFIG_USB_SERIAL_EDGEPORT_TI is not set
# CONFIG_USB_SERIAL_F81232 is not set
# CONFIG_USB_SERIAL_GARMIN is not set
# CONFIG_USB_SERIAL_IPW is not set
# CONFIG_USB_SERIAL_IUU is not set
# CONFIG_USB_SERIAL_KEYSPAN_PDA is not set
# CONFIG_USB_SERIAL_KEYSPAN is not set
# CONFIG_USB_SERIAL_KLSI is not set
# CONFIG_USB_SERIAL_KOBIL_SCT is not set
# CONFIG_USB_SERIAL_MCT_U232 is not set
# CONFIG_USB_SERIAL_METRO is not set
# CONFIG_USB_SERIAL_MOS7720 is not set
# CONFIG_USB_SERIAL_MOS7840 is not set
# CONFIG_USB_SERIAL_MOTOROLA is not set
# CONFIG_USB_SERIAL_NAVMAN is not set
# CONFIG_USB_SERIAL_PL2303 is not set
# CONFIG_USB_SERIAL_OTI6858 is not set
# CONFIG_USB_SERIAL_QCAUX is not set
# CONFIG_USB_SERIAL_QUALCOMM is not set
# CONFIG_USB_SERIAL_SPCP8X5 is not set
# CONFIG_USB_SERIAL_HP4X is not set
# CONFIG_USB_SERIAL_SAFE is not set
# CONFIG_USB_SERIAL_SIEMENS_MPI is not set
# CONFIG_USB_SERIAL_SIERRAWIRELESS is not set
# CONFIG_USB_SERIAL_SYMBOL is not set
# CONFIG_USB_SERIAL_TI is not set
# CONFIG_USB_SERIAL_CYBERJACK is not set
# CONFIG_USB_SERIAL_XIRCOM is not set
# CONFIG_USB_SERIAL_OPTION is not set
# CONFIG_USB_SERIAL_OMNINET is not set
# CONFIG_USB_SERIAL_OPTICON is not set
# CONFIG_USB_SERIAL_VIVOPAY_SERIAL is not set
# CONFIG_USB_SERIAL_ZIO is not set
# CONFIG_USB_SERIAL_SSU100 is not set
# CONFIG_USB_SERIAL_DEBUG is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_LED is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_GADGET is not set

#
# OTG and related infrastructure
#
CONFIG_USB_OTG_UTILS=y
# CONFIG_USB_GPIO_VBUS is not set
CONFIG_USB_ULPI=y
# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_MMC is not set
# CONFIG_MEMSTICK is not set
CONFIG_NEW_LEDS=y
CONFIG_LEDS_CLASS=y

#
# LED drivers
#
# CONFIG_LEDS_LM3530 is not set
# CONFIG_LEDS_PCA9532 is not set
CONFIG_LEDS_GPIO=y
# CONFIG_LEDS_LP3944 is not set
# CONFIG_LEDS_LP5521 is not set
# CONFIG_LEDS_LP5523 is not set
# CONFIG_LEDS_PCA955X is not set
# CONFIG_LEDS_PCA9633 is not set
# CONFIG_LEDS_DAC124S085 is not set
# CONFIG_LEDS_BD2802 is not set
# CONFIG_LEDS_LT3593 is not set
# CONFIG_LEDS_RENESAS_TPU is not set
# CONFIG_LEDS_TCA6507 is not set
# CONFIG_LEDS_OT200 is not set
CONFIG_LEDS_TRIGGERS=y

#
# LED Triggers
#
CONFIG_LEDS_TRIGGER_TIMER=m
CONFIG_LEDS_TRIGGER_HEARTBEAT=m
CONFIG_LEDS_TRIGGER_BACKLIGHT=m
CONFIG_LEDS_TRIGGER_GPIO=m
CONFIG_LEDS_TRIGGER_DEFAULT_ON=m

#
# iptables trigger is under Netfilter config (LED target)
#
# CONFIG_ACCESSIBILITY is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_DS1307 is not set
# CONFIG_RTC_DRV_DS1374 is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_DS3232 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_ISL12022 is not set
# CONFIG_RTC_DRV_X1205 is not set
CONFIG_RTC_DRV_PCF8563=y
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_BQ32K is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8581 is not set
# CONFIG_RTC_DRV_RX8025 is not set
# CONFIG_RTC_DRV_EM3027 is not set
# CONFIG_RTC_DRV_RV3029C2 is not set

#
# SPI RTC drivers
#
# CONFIG_RTC_DRV_M41T93 is not set
# CONFIG_RTC_DRV_M41T94 is not set
# CONFIG_RTC_DRV_DS1305 is not set
# CONFIG_RTC_DRV_DS1390 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
# CONFIG_RTC_DRV_R9701 is not set
# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_DS3234 is not set
# CONFIG_RTC_DRV_PCF2123 is not set

#
# Platform RTC drivers
#
# CONFIG_RTC_DRV_CMOS is not set
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_MSM6242 is not set
CONFIG_RTC_MXC=y
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_RP5C01 is not set
# CONFIG_RTC_DRV_V3020 is not set

#
# on-CPU RTC drivers
#
CONFIG_DMADEVICES=y
# CONFIG_DMADEVICES_DEBUG is not set

#
# DMA Devices
#
# CONFIG_DW_DMAC is not set
# CONFIG_MX3_IPU is not set
# CONFIG_TIMB_DMA is not set
CONFIG_IMX_SDMA=m
CONFIG_IMX_DMA=m
CONFIG_DMA_ENGINE=y

#
# DMA Clients
#
# CONFIG_NET_DMA is not set
# CONFIG_ASYNC_TX_DMA is not set
# CONFIG_DMATEST is not set
# CONFIG_AUXDISPLAY is not set
# CONFIG_UIO is not set

#
# Virtio drivers
#
# CONFIG_VIRTIO_BALLOON is not set
# CONFIG_VIRTIO_MMIO is not set

#
# Microsoft Hyper-V guest support
#
# CONFIG_STAGING is not set
CONFIG_CLKDEV_LOOKUP=y

#
# Hardware Spinlock drivers
#
CONFIG_CLKSRC_MMIO=y
CONFIG_IOMMU_SUPPORT=y

#
# Remoteproc drivers (EXPERIMENTAL)
#

#
# Rpmsg drivers (EXPERIMENTAL)
#
# CONFIG_VIRT_DRIVERS is not set
# CONFIG_PM_DEVFREQ is not set

#
# File systems
#
# CONFIG_EXT2_FS is not set
# CONFIG_EXT3_FS is not set
# CONFIG_EXT4_FS is not set
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
# CONFIG_FS_POSIX_ACL is not set
CONFIG_FILE_LOCKING=y
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_FANOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_QUOTACTL is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_FUSE_FS is not set

#
# Caches
#
# CONFIG_FSCACHE is not set

#
# CD-ROM/DVD Filesystems
#
# CONFIG_ISO9660_FS is not set
# CONFIG_UDF_FS is not set

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=y
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_NTFS_FS is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_TMPFS_XATTR is not set
# CONFIG_HUGETLB_PAGE is not set
# CONFIG_CONFIGFS_FS is not set
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
# CONFIG_JFFS2_FS is not set
CONFIG_UBIFS_FS=y
CONFIG_UBIFS_FS_XATTR=y
CONFIG_UBIFS_FS_ADVANCED_COMPR=y
CONFIG_UBIFS_FS_LZO=y
CONFIG_UBIFS_FS_ZLIB=y
# CONFIG_UBIFS_FS_DEBUG is not set
# CONFIG_LOGFS is not set
# CONFIG_CRAMFS is not set
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_QNX6FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_PSTORE is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
# CONFIG_NETWORK_FILESYSTEMS is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=m
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
CONFIG_NLS_CODEPAGE_850=m
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
CONFIG_NLS_ASCII=m
CONFIG_NLS_ISO8859_1=m
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
CONFIG_NLS_ISO8859_15=m
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
CONFIG_NLS_UTF8=m

#
# Kernel hacking
#
# CONFIG_PRINTK_TIME is not set
CONFIG_DEFAULT_MESSAGE_LOGLEVEL=4
CONFIG_ENABLE_WARN_DEPRECATED=y
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=1024
CONFIG_MAGIC_SYSRQ=y
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_UNUSED_SYMBOLS is not set
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_DEBUG_KERNEL=y
# CONFIG_LOCKUP_DETECTOR is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
# CONFIG_DETECT_HUNG_TASK is not set
# CONFIG_SCHED_DEBUG is not set
# CONFIG_SCHEDSTATS is not set
# CONFIG_TIMER_STATS is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_DEBUG_SLAB is not set
# CONFIG_DEBUG_KMEMLEAK is not set
# CONFIG_DEBUG_PREEMPT is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_RT_MUTEX_TESTER is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_PROVE_LOCKING is not set
# CONFIG_SPARSE_RCU_POINTER is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_ATOMIC_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_KOBJECT is not set
# CONFIG_DEBUG_BUGVERBOSE is not set
CONFIG_DEBUG_INFO=y
# CONFIG_DEBUG_INFO_REDUCED is not set
# CONFIG_DEBUG_VM is not set
# CONFIG_DEBUG_WRITECOUNT is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
# CONFIG_DEBUG_LIST is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set
CONFIG_FRAME_POINTER=y
# CONFIG_BOOT_PRINTK_DELAY is not set
# CONFIG_RCU_TORTURE_TEST is not set
# CONFIG_RCU_TRACE is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
# CONFIG_LKDTM is not set
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
# CONFIG_DEBUG_PAGEALLOC is not set
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_C_RECORDMCOUNT=y
CONFIG_TRACING_SUPPORT=y
# CONFIG_FTRACE is not set
# CONFIG_DYNAMIC_DEBUG is not set
# CONFIG_DMA_API_DEBUG is not set
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_STRICT_DEVMEM is not set
# CONFIG_ARM_UNWIND is not set
# CONFIG_DEBUG_USER is not set
# CONFIG_DEBUG_LL is not set

#
# Security options
#
# CONFIG_KEYS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_DEFAULT_SECURITY=""
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_PCOMP=m
CONFIG_CRYPTO_PCOMP2=y
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
# CONFIG_CRYPTO_USER is not set
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
# CONFIG_CRYPTO_GF128MUL is not set
# CONFIG_CRYPTO_NULL is not set
CONFIG_CRYPTO_WORKQUEUE=y
# CONFIG_CRYPTO_CRYPTD is not set
# CONFIG_CRYPTO_AUTHENC is not set
# CONFIG_CRYPTO_TEST is not set

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_SEQIV is not set

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
# CONFIG_CRYPTO_ECB is not set
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_PCBC is not set
# CONFIG_CRYPTO_XTS is not set

#
# Hash modes
#
# CONFIG_CRYPTO_HMAC is not set
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_VMAC is not set

#
# Digest
#
# CONFIG_CRYPTO_CRC32C is not set
# CONFIG_CRYPTO_GHASH is not set
# CONFIG_CRYPTO_MD4 is not set
CONFIG_CRYPTO_MD5=y
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
# CONFIG_CRYPTO_SHA1 is not set
# CONFIG_CRYPTO_SHA256 is not set
# CONFIG_CRYPTO_SHA512 is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_WP512 is not set

#
# Ciphers
#
# CONFIG_CRYPTO_AES is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_ARC4 is not set
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
CONFIG_CRYPTO_DES=y
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_TEA is not set
# CONFIG_CRYPTO_TWOFISH is not set

#
# Compression
#
CONFIG_CRYPTO_DEFLATE=y
CONFIG_CRYPTO_ZLIB=m
CONFIG_CRYPTO_LZO=y

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
# CONFIG_CRYPTO_USER_API_HASH is not set
# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
CONFIG_CRYPTO_HW=y
# CONFIG_BINARY_PRINTF is not set

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_RATIONAL=y
CONFIG_GENERIC_PCI_IOMAP=y
CONFIG_GENERIC_IO=y
CONFIG_CRC_CCITT=y
CONFIG_CRC16=y
# CONFIG_CRC_T10DIF is not set
# CONFIG_CRC_ITU_T is not set
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC7 is not set
# CONFIG_LIBCRC32C is not set
# CONFIG_CRC8 is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_COMPRESS=y
CONFIG_LZO_DECOMPRESS=y
# CONFIG_XZ_DEC is not set
# CONFIG_XZ_DEC_BCJ is not set
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT=y
CONFIG_HAS_DMA=y
CONFIG_DQL=y
CONFIG_NLATTR=y
CONFIG_GENERIC_ATOMIC64=y
# CONFIG_AVERAGE is not set
# CONFIG_CORDIC is not set

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: 3.4.28-rt40 arm freescale imx35 pcm43
  2013-02-06 16:10 3.4.28-rt40 arm freescale imx35 pcm43 Tim Sander
@ 2013-02-06 16:43 ` Tim Sander
  2013-02-07  8:57   ` 3.4.28-rt40 arm freescale imx35 pcm43 - patch 86236252d2449313bdbac790023cbc957bf6e426 is cause Tim Sander
  2013-02-13 11:59   ` 3.4.28-rt40 arm freescale imx35 pcm43 Thomas Gleixner
  0 siblings, 2 replies; 13+ messages in thread
From: Tim Sander @ 2013-02-06 16:43 UTC (permalink / raw)
  To: linux-rt-users

Hi

I just noticed that the thread irq/45-IMX-uart is the current thread. 
Nevertheless the interrupt for this thread is enabled which seems wrong to me?
So the interrupt handler imx_rxint does not get call as it is always 
interrupted by the level triggered interrupt of the same hw source?

Thanks
Tim

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: 3.4.28-rt40 arm freescale imx35 pcm43 - patch 86236252d2449313bdbac790023cbc957bf6e426 is cause
  2013-02-06 16:43 ` Tim Sander
@ 2013-02-07  8:57   ` Tim Sander
  2013-02-13 12:13     ` Thomas Gleixner
  2013-02-13 11:59   ` 3.4.28-rt40 arm freescale imx35 pcm43 Thomas Gleixner
  1 sibling, 1 reply; 13+ messages in thread
From: Tim Sander @ 2013-02-07  8:57 UTC (permalink / raw)
  To: linux-rt-users

Hi

Just another update on this stuff. I noticed that there has been a patch added* 
with spinlocks to the imx.c serial driver. I reverted this patch and now my 
serialfuz programm "only" kills the serial port with a not so nice oom 
condition. But at least it does not show the runaway interrupt problem.

Best regards
Tim

* its 86236252d2449313bdbac790023cbc957bf6e426
    commit 9ec1882df244c4ee1baa692676fef5e8b0f5487d upstream.

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: 3.4.28-rt40 arm freescale imx35 pcm43
  2013-02-06 16:43 ` Tim Sander
  2013-02-07  8:57   ` 3.4.28-rt40 arm freescale imx35 pcm43 - patch 86236252d2449313bdbac790023cbc957bf6e426 is cause Tim Sander
@ 2013-02-13 11:59   ` Thomas Gleixner
  1 sibling, 0 replies; 13+ messages in thread
From: Thomas Gleixner @ 2013-02-13 11:59 UTC (permalink / raw)
  To: Tim Sander; +Cc: linux-rt-users

On Wed, 6 Feb 2013, Tim Sander wrote:
> I just noticed that the thread irq/45-IMX-uart is the current thread. 
> Nevertheless the interrupt for this thread is enabled which seems wrong to me?

That's wrong indeed. The forced threading masks the interrupt line in
the hard interrupt handling code and keeps it masked. It's unmasked
after the handler thread returns from the interrupt handler function.

> So the interrupt handler imx_rxint does not get call as it is always 
> interrupted by the level triggered interrupt of the same hw source?

Right. You have to find the reason, why the interrupt is not disabled
at the interrupt controller level.

Thanks,

	tglx




^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: 3.4.28-rt40 arm freescale imx35 pcm43 - patch 86236252d2449313bdbac790023cbc957bf6e426 is cause
  2013-02-07  8:57   ` 3.4.28-rt40 arm freescale imx35 pcm43 - patch 86236252d2449313bdbac790023cbc957bf6e426 is cause Tim Sander
@ 2013-02-13 12:13     ` Thomas Gleixner
  2013-02-13 17:07       ` Tim Sander
  0 siblings, 1 reply; 13+ messages in thread
From: Thomas Gleixner @ 2013-02-13 12:13 UTC (permalink / raw)
  To: Tim Sander; +Cc: linux-rt-users

On Thu, 7 Feb 2013, Tim Sander wrote:

> Hi
> 
> Just another update on this stuff. I noticed that there has been a patch added* 
> with spinlocks to the imx.c serial driver. I reverted this patch and now my 
> serialfuz programm "only" kills the serial port with a not so nice oom 
> condition. But at least it does not show the runaway interrupt problem.

That does not make any sense, really. The runnaway interrupt issue is
completely unrelated to this commit.

Though the commit in question introduces a recursive locking problem
in imx_console_write().

imx_rxint()
{
  spin_lock_irqsave(&sport->port.lock,flags);
  ...
  uart_handle_sysrq_char();
    sysrq_function();
      printk();
        imx_console_write();
	  spin_lock_irqsave(&sport->port.lock,flags); <--- BOOOM

Now the kernel cannot tell you, what happened because it's stuck dead.

Find below a completely untested patch which should fix that issue.

Thanks,

	tglx

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 0de7ed7..e1069b4 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1225,8 +1225,12 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
 	struct imx_port_ucrs old_ucr;
 	unsigned int ucr1;
 	unsigned long flags;
+	int locked = 1;
 
-	spin_lock_irqsave(&sport->port.lock, flags);
+	if (sport->port.sysrq || oops_in_progress || in_kdb_printk())
+		locked = spin_trylock_irqsave(&sport->port.lock, flags);
+	else
+		spin_lock_irqsave(&sport->port.lock, flags);
 
 	/*
 	 *	First, save UCR1/2/3 and then disable interrupts
@@ -1253,7 +1257,8 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
 
 	imx_port_ucrs_restore(&sport->port, &old_ucr);
 
-	spin_unlock_irqrestore(&sport->port.lock, flags);
+	if (locked)
+		spin_unlock_irqrestore(&sport->port.lock, flags);
 }
 
 /*


^ permalink raw reply related	[flat|nested] 13+ messages in thread
* Re: 3.4.28-rt40 arm freescale imx35 pcm43 - patch 86236252d2449313bdbac790023cbc957bf6e426 is cause
  2013-02-13 12:13     ` Thomas Gleixner
@ 2013-02-13 17:07       ` Tim Sander
  2013-02-13 17:25         ` Thomas Gleixner
  2013-02-13 17:40         ` Thomas Gleixner
  0 siblings, 2 replies; 13+ messages in thread
From: Tim Sander @ 2013-02-13 17:07 UTC (permalink / raw)
  To: Thomas Gleixner; +Cc: linux-rt-users

Hi Thomas
> > Just another update on this stuff. I noticed that there has been a patch
> > added* with spinlocks to the imx.c serial driver. I reverted this patch
> > and now my serialfuz programm "only" kills the serial port with a not so
> > nice oom condition. But at least it does not show the runaway interrupt
> > problem.
> That does not make any sense, really. The runnaway interrupt issue is
> completely unrelated to this commit.
One thing that puzzles me is the fact that it does! So removing the mentioned 
spinlock patch creates the same result as using your fixed patch.

As the other problem with the driver i posted shows the same interrupt runaway 
symptom as this i have a very bad gut feeling about this... 
Or probably its not a runnaway interrupt problem but a double 
spin_lock_irqsave.

Also the fact that my serialfuz program i posted is able to give the system an 
Out Of Memory condition is strange. I mean throwing random chars at a getty 
should'nt exhaust memory so fast.

> Though the commit in question introduces a recursive locking problem
> in imx_console_write().
> 
> imx_rxint()
> {
>   spin_lock_irqsave(&sport->port.lock,flags);
>   ...
>   uart_handle_sysrq_char();
>     sysrq_function();
>       printk();
>         imx_console_write();
> 	  spin_lock_irqsave(&sport->port.lock,flags); <--- BOOOM
> 
> Now the kernel cannot tell you, what happened because it's stuck dead.
> 
> Find below a completely untested patch which should fix that issue.
The patch didn't compile cleanly, so i removed the last or statment (albeit 
without knowing if its important (but it's not defined so it can't be ;-).

Below is a patch that compiles and survives as the undone 
86236252d2449313bdbac790023cbc957bf6e426 patch.

Thanks
Tim

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 0de7ed7..e1069b4 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -1225,8 +1225,12 @@ imx_console_write(struct console *co, const char *s, 
unsigned int count)
        struct imx_port_ucrs old_ucr;
        unsigned int ucr1;
        unsigned long flags;
+       int locked = 1;
 
-       spin_lock_irqsave(&sport->port.lock, flags);
+       if (sport->port.sysrq || oops_in_progress )
+               locked = spin_trylock_irqsave(&sport->port.lock, flags);
+       else
+               spin_lock_irqsave(&sport->port.lock, flags);
 
        /*
         *      First, save UCR1/2/3 and then disable interrupts
@@ -1253,7 +1257,8 @@ imx_console_write(struct console *co, const char *s, 
unsigned int count)
 
        imx_port_ucrs_restore(&sport->port, &old_ucr);
 
-       spin_unlock_irqrestore(&sport->port.lock, flags);
+       if (locked)
+               spin_unlock_irqrestore(&sport->port.lock, flags);
 }
 
 /*


^ permalink raw reply related	[flat|nested] 13+ messages in thread
* Re: 3.4.28-rt40 arm freescale imx35 pcm43 - patch 86236252d2449313bdbac790023cbc957bf6e426 is cause
  2013-02-13 17:07       ` Tim Sander
@ 2013-02-13 17:25         ` Thomas Gleixner
  2013-02-13 17:40         ` Thomas Gleixner
  1 sibling, 0 replies; 13+ messages in thread
From: Thomas Gleixner @ 2013-02-13 17:25 UTC (permalink / raw)
  To: Tim Sander; +Cc: linux-rt-users

On Wed, 13 Feb 2013, Tim Sander wrote:
> > Find below a completely untested patch which should fix that issue.
> The patch didn't compile cleanly, so i removed the last or statment (albeit 
> without knowing if its important (but it's not defined so it can't be ;-).

Well, at least in my kernel source it's defined in
include/linux/kdb.h. So adding the header file to imx.c might cure
that issue.

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: 3.4.28-rt40 arm freescale imx35 pcm43 - patch 86236252d2449313bdbac790023cbc957bf6e426 is cause
  2013-02-13 17:07       ` Tim Sander
  2013-02-13 17:25         ` Thomas Gleixner
@ 2013-02-13 17:40         ` Thomas Gleixner
  2013-02-14 15:38           ` [PATCH] 3.4.28-rt40 tglx fix imx.c spinlock Tim Sander
  1 sibling, 1 reply; 13+ messages in thread
From: Thomas Gleixner @ 2013-02-13 17:40 UTC (permalink / raw)
  To: Tim Sander; +Cc: linux-rt-users

On Wed, 13 Feb 2013, Tim Sander wrote:
> Hi Thomas
> > > Just another update on this stuff. I noticed that there has been a patch
> > > added* with spinlocks to the imx.c serial driver. I reverted this patch
> > > and now my serialfuz programm "only" kills the serial port with a not so
> > > nice oom condition. But at least it does not show the runaway interrupt
> > > problem.
> > That does not make any sense, really. The runnaway interrupt issue is
> > completely unrelated to this commit.
> One thing that puzzles me is the fact that it does! So removing the mentioned 
> spinlock patch creates the same result as using your fixed patch.
> 
> As the other problem with the driver i posted shows the same interrupt runaway 
> symptom as this i have a very bad gut feeling about this... 
> Or probably its not a runnaway interrupt problem but a double 
> spin_lock_irqsave.

Well, you claimed that it is a runnaway interrupt. So much for the
theory :)

The issue with the recursive locking is not an RT issue. You can
observe the problem on mainline, when you enable PROVE_LOCKING and
issue a sysrq or oopsing in a section which holds the port.lock
already.

The reason why you can't observe it with PREEMPT_RT_FULL=n and
PROVE_LOCKING=n is, that the spinlocks on UP machines are compiled
away, so recursive locking does not lead to an observable dead lock.

> Also the fact that my serialfuz program i posted is able to give the system an 
> Out Of Memory condition is strange. I mean throwing random chars at a getty 
> should'nt exhaust memory so fast.

That's true, but w/o seing the OOM output I can't tell what's
exhausting the memory.

Thanks,

	tglx

^ permalink raw reply	[flat|nested] 13+ messages in thread
* [PATCH] 3.4.28-rt40 tglx fix imx.c spinlock
  2013-02-13 17:40         ` Thomas Gleixner
@ 2013-02-14 15:38           ` Tim Sander
  2013-02-14 22:35             ` Thomas Gleixner
  0 siblings, 1 reply; 13+ messages in thread
From: Tim Sander @ 2013-02-14 15:38 UTC (permalink / raw)
  To: Thomas Gleixner; +Cc: linux-rt-users, linux-kernel

Hi Thomas
> > > > Just another update on this stuff. I noticed that there has been a
> > > > patch
> > > > added* with spinlocks to the imx.c serial driver. I reverted this
> > > > patch
> > > > and now my serialfuz programm "only" kills the serial port with a not
> > > > so
> > > > nice oom condition. But at least it does not show the runaway
> > > > interrupt
> > > > problem.
> > > 
> > > That does not make any sense, really. The runnaway interrupt issue is
> > > completely unrelated to this commit.
> > 
> > One thing that puzzles me is the fact that it does! So removing the
> > mentioned spinlock patch creates the same result as using your fixed
> > patch.
> > 
> > As the other problem with the driver i posted shows the same interrupt
> > runaway symptom as this i have a very bad gut feeling about this...
> > Or probably its not a runnaway interrupt problem but a double
> > spin_lock_irqsave.
> 
> Well, you claimed that it is a runnaway interrupt. So much for the
> theory :)
Well i sleept over that one. The symptoms in both cases seem to be identical:
system locked up,interrupt pending, no output at all. 

But there are some differences. Concerning the issue described in this mail:
http://www.spinics.net/lists/linux-rt-users/msg09303.html
After the complete lockup of the system i could get into a working system
 by switching of the interrupt source of the respective interrupt. After that the
interrupt readings in /proc/interrupts where insanely high. So definetly a runnaway
 interrupt issue. But this issue seems to be not related to preempt rt. They where
just so similar on the first glance that i thought they where related.

I could not get the system back running in switching of the serial interrupt.
Concerning the serial problem i consider the problem solved by the patch below. 
Thanks!

A patch for 3.6-rt will be sent in another reply. As it does not apply cleanly.

> The issue with the recursive locking is not an RT issue. You can
> observe the problem on mainline, when you enable PROVE_LOCKING and
> issue a sysrq or oopsing in a section which holds the port.lock
> already.
> 
> The reason why you can't observe it with PREEMPT_RT_FULL=n and
> PROVE_LOCKING=n is, that the spinlocks on UP machines are compiled
> away, so recursive locking does not lead to an observable dead lock.
Ah, yes that perfectly explains why i have not seen this error in non preempt-rt
mode.

> > Also the fact that my serialfuz program i posted is able to give the
> > system an Out Of Memory condition is strange. I mean throwing random
> > chars at a getty should'nt exhaust memory so fast.
> 
> That's true, but w/o seing the OOM output I can't tell what's
> exhausting the memory.
When fuzzing the serial port one probably should switch of sysreq. It seems 
as if there is a break send somehow and then it selects the OOM option.
So when switching of MAGIC_SYSRQ the OOMs are gone. So its a non issue.

Best regards
Tim


Signed-off-by: Tim Sander <tim@krieglstein.org>

---
 drivers/tty/serial/imx.c |   10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index 0de7ed7..f1f5c4e 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -47,6 +47,7 @@
 #include <linux/slab.h>
 #include <linux/of.h>
 #include <linux/of_device.h>
+#include <linux/kdb.h>

 #include <asm/io.h>
 #include <asm/irq.h>
@@ -1225,8 +1226,12 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
    struct imx_port_ucrs old_ucr;
    unsigned int ucr1;
    unsigned long flags;
+   int locked = 1;

-   spin_lock_irqsave(&sport->port.lock, flags);
+   if (sport->port.sysrq || oops_in_progress || in_kdb_printk())
+       locked = spin_trylock_irqsave(&sport->port.lock, flags);
+   else
+       spin_lock_irqsave(&sport->port.lock, flags);

    /*
     *  First, save UCR1/2/3 and then disable interrupts
@@ -1253,7 +1258,8 @@ imx_console_write(struct console *co, const char *s, unsigned int count)

    imx_port_ucrs_restore(&sport->port, &old_ucr);

-   spin_unlock_irqrestore(&sport->port.lock, flags);
+   if (locked)
+       spin_unlock_irqrestore(&sport->port.lock, flags);
 }

 /*
-- 
1.7.9.5





^ permalink raw reply related	[flat|nested] 13+ messages in thread
* Re: [PATCH] 3.4.28-rt40 tglx fix imx.c spinlock
  2013-02-14 15:38           ` [PATCH] 3.4.28-rt40 tglx fix imx.c spinlock Tim Sander
@ 2013-02-14 22:35             ` Thomas Gleixner
  2013-02-15  1:13               ` Paul Gortmaker
  0 siblings, 1 reply; 13+ messages in thread
From: Thomas Gleixner @ 2013-02-14 22:35 UTC (permalink / raw)
  To: Tim Sander; +Cc: linux-rt-users, linux-kernel

On Thu, 14 Feb 2013, Tim Sander wrote:
> > That's true, but w/o seing the OOM output I can't tell what's
> > exhausting the memory.
> When fuzzing the serial port one probably should switch of sysreq. It seems 
> as if there is a break send somehow and then it selects the OOM option.
> So when switching of MAGIC_SYSRQ the OOMs are gone. So its a non issue.

Amazing that you get the break+oom combo out of that fuzzer!

^ permalink raw reply	[flat|nested] 13+ messages in thread
* Re: [PATCH] 3.4.28-rt40 tglx fix imx.c spinlock
  2013-02-14 22:35             ` Thomas Gleixner
@ 2013-02-15  1:13               ` Paul Gortmaker
  2013-02-15  7:05                 ` [PATHC] 3.6 spinlock fix Tim Sander
  0 siblings, 1 reply; 13+ messages in thread
From: Paul Gortmaker @ 2013-02-15  1:13 UTC (permalink / raw)
  To: Thomas Gleixner; +Cc: Tim Sander, linux-rt-users, LKML, Dave Jones

[Adding dave jones to CC]

On Thu, Feb 14, 2013 at 5:35 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> On Thu, 14 Feb 2013, Tim Sander wrote:
>> > That's true, but w/o seing the OOM output I can't tell what's
>> > exhausting the memory.
>> When fuzzing the serial port one probably should switch of sysreq. It seems
>> as if there is a break send somehow and then it selects the OOM option.
>> So when switching of MAGIC_SYSRQ the OOMs are gone. So its a non issue.
>
> Amazing that you get the break+oom combo out of that fuzzer!

Doing a basic "git whatchanged" and searching for "trinity" is rather
impressive, regardless of the kernel version and/or where "rogue states"
may currently be at with their "program"....   Kudos to davej for that.

P.
--

^ permalink raw reply	[flat|nested] 13+ messages in thread
* [PATHC] 3.6 spinlock fix
  2013-02-15  1:13               ` Paul Gortmaker
@ 2013-02-15  7:05                 ` Tim Sander
  2013-02-15 10:18                   ` Thomas Gleixner
  0 siblings, 1 reply; 13+ messages in thread
From: Tim Sander @ 2013-02-15  7:05 UTC (permalink / raw)
  To: Paul Gortmaker; +Cc: Thomas Gleixner, linux-rt-users, LKML, Dave Jones, gregkh

Hi
> On Thu, Feb 14, 2013 at 5:35 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> > On Thu, 14 Feb 2013, Tim Sander wrote:
> >> > That's true, but w/o seing the OOM output I can't tell what's
> >> > exhausting the memory.
> >> 
> >> When fuzzing the serial port one probably should switch of sysreq. It
> >> seems
> >> as if there is a break send somehow and then it selects the OOM option.
> >> So when switching of MAGIC_SYSRQ the OOMs are gone. So its a non issue.
> > 
> > Amazing that you get the break+oom combo out of that fuzzer!
That fuzzer is running at 57600Hz while the serial port of the fuzzed device is
running twice that rate. The break condition seems to be easy hit by the fuzzer
 i've sent in a previous mail. 
> Doing a basic "git whatchanged" and searching for "trinity" is rather
> impressive, regardless of the kernel version and/or where "rogue states"
> may currently be at with their "program"....   Kudos to davej for that.
Mh, but thats not trinity! Havn't tried that but well fuzzing at a different 
serial rate than the receiver might be a good idea even if it sounds pretty stupid.

Attached is the patch for the 3.6.9-rt kernel (but i think this should also apply 
to the "normal" 3.6 i guess).  But as Greg already took care of this patch i guess 
that only for convinience. Also it seems as if the patch sent to Greg is missing the
#include <linux/kdb.h>?

Best regards
Tim

    tglx: fix imx.c spinlock

diff --git a/drivers/tty/serial/imx.c b/drivers/tty/serial/imx.c
index e309e8b..39820ea 100644
--- a/drivers/tty/serial/imx.c
+++ b/drivers/tty/serial/imx.c
@@ -48,6 +48,7 @@
 #include <linux/of.h>
 #include <linux/of_device.h>
 #include <linux/pinctrl/consumer.h>
+#include <linux/kdb.h>
 
 #include <asm/io.h>
 #include <asm/irq.h>
@@ -1213,8 +1214,12 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
        struct imx_port_ucrs old_ucr;
        unsigned int ucr1;
        unsigned long flags;
+       int locked = 1;
 
-       spin_lock_irqsave(&sport->port.lock, flags);
+       if (sport->port.sysrq || oops_in_progress || in_kdb_printk())
+               locked = spin_trylock_irqsave(&sport->port.lock, flags);
+       else
+               spin_lock_irqsave(&sport->port.lock, flags);
 
        /*
         *      First, save UCR1/2/3 and then disable interrupts
@@ -1241,7 +1246,8 @@ imx_console_write(struct console *co, const char *s, unsigned int count)
 
        imx_port_ucrs_restore(&sport->port, &old_ucr);
 
-       spin_unlock_irqrestore(&sport->port.lock, flags);
+       if (locked)
+               spin_unlock_irqrestore(&sport->port.lock, flags);
 }
 
 /*


^ permalink raw reply related	[flat|nested] 13+ messages in thread
* Re: [PATHC] 3.6 spinlock fix
  2013-02-15  7:05                 ` [PATHC] 3.6 spinlock fix Tim Sander
@ 2013-02-15 10:18                   ` Thomas Gleixner
  0 siblings, 0 replies; 13+ messages in thread
From: Thomas Gleixner @ 2013-02-15 10:18 UTC (permalink / raw)
  To: Tim Sander; +Cc: Paul Gortmaker, linux-rt-users, LKML, Dave Jones, gregkh

On Fri, 15 Feb 2013, Tim Sander wrote:
> > On Thu, Feb 14, 2013 at 5:35 PM, Thomas Gleixner <tglx@linutronix.de> wrote:
> > > On Thu, 14 Feb 2013, Tim Sander wrote:
> > >> > That's true, but w/o seing the OOM output I can't tell what's
> > >> > exhausting the memory.
> > >> 
> > >> When fuzzing the serial port one probably should switch of sysreq. It
> > >> seems
> > >> as if there is a break send somehow and then it selects the OOM option.
> > >> So when switching of MAGIC_SYSRQ the OOMs are gone. So its a non issue.
> > > 
> > > Amazing that you get the break+oom combo out of that fuzzer!
> That fuzzer is running at 57600Hz while the serial port of the fuzzed device is
> running twice that rate. The break condition seems to be easy hit by the fuzzer
>  i've sent in a previous mail. 
> > Doing a basic "git whatchanged" and searching for "trinity" is rather
> > impressive, regardless of the kernel version and/or where "rogue states"
> > may currently be at with their "program"....   Kudos to davej for that.
> Mh, but thats not trinity! Havn't tried that but well fuzzing at a different 
> serial rate than the receiver might be a good idea even if it sounds pretty stupid.
> 
> Attached is the patch for the 3.6.9-rt kernel (but i think this should also apply 
> to the "normal" 3.6 i guess).  But as Greg already took care of this patch i guess 
> that only for convinience. Also it seems as if the patch sent to Greg is missing the
> #include <linux/kdb.h>?

Errm, no. The in_kdb_printk() is an RT specific issue, so I left it
out for the mainline fix.

Thanks,

	tglx

^ permalink raw reply	[flat|nested] 13+ messages in thread
end of thread, other threads:[~2013-02-15 10:18 UTC | newest]

Thread overview: 13+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2013-02-06 16:10 3.4.28-rt40 arm freescale imx35 pcm43 Tim Sander
2013-02-06 16:43 ` Tim Sander
2013-02-07  8:57   ` 3.4.28-rt40 arm freescale imx35 pcm43 - patch 86236252d2449313bdbac790023cbc957bf6e426 is cause Tim Sander
2013-02-13 12:13     ` Thomas Gleixner
2013-02-13 17:07       ` Tim Sander
2013-02-13 17:25         ` Thomas Gleixner
2013-02-13 17:40         ` Thomas Gleixner
2013-02-14 15:38           ` [PATCH] 3.4.28-rt40 tglx fix imx.c spinlock Tim Sander
2013-02-14 22:35             ` Thomas Gleixner
2013-02-15  1:13               ` Paul Gortmaker
2013-02-15  7:05                 ` [PATHC] 3.6 spinlock fix Tim Sander
2013-02-15 10:18                   ` Thomas Gleixner
2013-02-13 11:59   ` 3.4.28-rt40 arm freescale imx35 pcm43 Thomas Gleixner

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