Merge branch 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

Pull ARM updates from Russell King:

 - an update for clkdev registration error detection to simplify users

 - add cpu capacity parsing from DT

 - support for larger cachelines found on UniPhier caches

 - documentation for udelay constants

 - properly tag assembly function declarations

 - remove unnecessary indirection of asm/mach-types.h

 - switch to syscall table based generation to simplify future additions
   of system calls, along with correpsonding commit for pkey syscalls

 - remove redundant sa1101 header file

 - RONX protect modules when they're in the vmalloc region

* 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: mm: allow set_memory_*() to be used on the vmalloc region
  ARM: mm: fix set_memory_*() bounds checks
  ARM: 8631/1: clkdev: Detect errors in clk_hw_register_clkdev() for mass registration
  ARM: 8629/1: vfp: properly tag assembly function declarations in C code
  ARM: 8622/3: add sysfs cpu_capacity attribute
  ARM: 8621/3: parse cpu capacity-dmips-mhz from DT
  ARM: 8623/1: mm: add ARM_L1_CACHE_SHIFT_7 for UniPhier outer cache
  ARM: Update mach-types
  ARM: sa1100: remove SA-1101 header file
  ARM: 8619/1: udelay: document the various constants
  ARM: wire up new pkey syscalls
  ARM: convert to generated system call tables
  ARM: remove indirection of asm/mach-types.h

3 files changed, 263 insertions, 448 deletions

diff --git a/arch/arm/kernel/calls.S b/arch/arm/kernel/calls.S
deleted file mode 100644
index 08030b18f10a..000000000000
--- a/arch/arm/kernel/calls.S
+++ /dev/null
@@ -1,415 +0,0 @@
-/*
- *  linux/arch/arm/kernel/calls.S
- *
- *  Copyright (C) 1995-2005 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- *  This file is included thrice in entry-common.S
- */
-/* 0 */		CALL(sys_restart_syscall)
-		CALL(sys_exit)
-		CALL(sys_fork)
-		CALL(sys_read)
-		CALL(sys_write)
-/* 5 */		CALL(sys_open)
-		CALL(sys_close)
-		CALL(sys_ni_syscall)		/* was sys_waitpid */
-		CALL(sys_creat)
-		CALL(sys_link)
-/* 10 */	CALL(sys_unlink)
-		CALL(sys_execve)
-		CALL(sys_chdir)
-		CALL(OBSOLETE(sys_time))	/* used by libc4 */
-		CALL(sys_mknod)
-/* 15 */	CALL(sys_chmod)
-		CALL(sys_lchown16)
-		CALL(sys_ni_syscall)		/* was sys_break */
-		CALL(sys_ni_syscall)		/* was sys_stat */
-		CALL(sys_lseek)
-/* 20 */	CALL(sys_getpid)
-		CALL(sys_mount)
-		CALL(OBSOLETE(sys_oldumount))	/* used by libc4 */
-		CALL(sys_setuid16)
-		CALL(sys_getuid16)
-/* 25 */	CALL(OBSOLETE(sys_stime))
-		CALL(sys_ptrace)
-		CALL(OBSOLETE(sys_alarm))	/* used by libc4 */
-		CALL(sys_ni_syscall)		/* was sys_fstat */
-		CALL(sys_pause)
-/* 30 */	CALL(OBSOLETE(sys_utime))	/* used by libc4 */
-		CALL(sys_ni_syscall)		/* was sys_stty */
-		CALL(sys_ni_syscall)		/* was sys_getty */
-		CALL(sys_access)
-		CALL(sys_nice)
-/* 35 */	CALL(sys_ni_syscall)		/* was sys_ftime */
-		CALL(sys_sync)
-		CALL(sys_kill)
-		CALL(sys_rename)
-		CALL(sys_mkdir)
-/* 40 */	CALL(sys_rmdir)
-		CALL(sys_dup)
-		CALL(sys_pipe)
-		CALL(sys_times)
-		CALL(sys_ni_syscall)		/* was sys_prof */
-/* 45 */	CALL(sys_brk)
-		CALL(sys_setgid16)
-		CALL(sys_getgid16)
-		CALL(sys_ni_syscall)		/* was sys_signal */
-		CALL(sys_geteuid16)
-/* 50 */	CALL(sys_getegid16)
-		CALL(sys_acct)
-		CALL(sys_umount)
-		CALL(sys_ni_syscall)		/* was sys_lock */
-		CALL(sys_ioctl)
-/* 55 */	CALL(sys_fcntl)
-		CALL(sys_ni_syscall)		/* was sys_mpx */
-		CALL(sys_setpgid)
-		CALL(sys_ni_syscall)		/* was sys_ulimit */
-		CALL(sys_ni_syscall)		/* was sys_olduname */
-/* 60 */	CALL(sys_umask)
-		CALL(sys_chroot)
-		CALL(sys_ustat)
-		CALL(sys_dup2)
-		CALL(sys_getppid)
-/* 65 */	CALL(sys_getpgrp)
-		CALL(sys_setsid)
-		CALL(sys_sigaction)
-		CALL(sys_ni_syscall)		/* was sys_sgetmask */
-		CALL(sys_ni_syscall)		/* was sys_ssetmask */
-/* 70 */	CALL(sys_setreuid16)
-		CALL(sys_setregid16)
-		CALL(sys_sigsuspend)
-		CALL(sys_sigpending)
-		CALL(sys_sethostname)
-/* 75 */	CALL(sys_setrlimit)
-		CALL(OBSOLETE(sys_old_getrlimit)) /* used by libc4 */
-		CALL(sys_getrusage)
-		CALL(sys_gettimeofday)
-		CALL(sys_settimeofday)
-/* 80 */	CALL(sys_getgroups16)
-		CALL(sys_setgroups16)
-		CALL(OBSOLETE(sys_old_select))	/* used by libc4 */
-		CALL(sys_symlink)
-		CALL(sys_ni_syscall)		/* was sys_lstat */
-/* 85 */	CALL(sys_readlink)
-		CALL(sys_uselib)
-		CALL(sys_swapon)
-		CALL(sys_reboot)
-		CALL(OBSOLETE(sys_old_readdir))	/* used by libc4 */
-/* 90 */	CALL(OBSOLETE(sys_old_mmap))	/* used by libc4 */
-		CALL(sys_munmap)
-		CALL(sys_truncate)
-		CALL(sys_ftruncate)
-		CALL(sys_fchmod)
-/* 95 */	CALL(sys_fchown16)
-		CALL(sys_getpriority)
-		CALL(sys_setpriority)
-		CALL(sys_ni_syscall)		/* was sys_profil */
-		CALL(sys_statfs)
-/* 100 */	CALL(sys_fstatfs)
-		CALL(sys_ni_syscall)		/* sys_ioperm */
-		CALL(OBSOLETE(ABI(sys_socketcall, sys_oabi_socketcall)))
-		CALL(sys_syslog)
-		CALL(sys_setitimer)
-/* 105 */	CALL(sys_getitimer)
-		CALL(sys_newstat)
-		CALL(sys_newlstat)
-		CALL(sys_newfstat)
-		CALL(sys_ni_syscall)		/* was sys_uname */
-/* 110 */	CALL(sys_ni_syscall)		/* was sys_iopl */
-		CALL(sys_vhangup)
-		CALL(sys_ni_syscall)
-		CALL(OBSOLETE(sys_syscall))	/* call a syscall */
-		CALL(sys_wait4)
-/* 115 */	CALL(sys_swapoff)
-		CALL(sys_sysinfo)
-		CALL(OBSOLETE(ABI(sys_ipc, sys_oabi_ipc)))
-		CALL(sys_fsync)
-		CALL(sys_sigreturn_wrapper)
-/* 120 */	CALL(sys_clone)
-		CALL(sys_setdomainname)
-		CALL(sys_newuname)
-		CALL(sys_ni_syscall)		/* modify_ldt */
-		CALL(sys_adjtimex)
-/* 125 */	CALL(sys_mprotect)
-		CALL(sys_sigprocmask)
-		CALL(sys_ni_syscall)		/* was sys_create_module */
-		CALL(sys_init_module)
-		CALL(sys_delete_module)
-/* 130 */	CALL(sys_ni_syscall)		/* was sys_get_kernel_syms */
-		CALL(sys_quotactl)
-		CALL(sys_getpgid)
-		CALL(sys_fchdir)
-		CALL(sys_bdflush)
-/* 135 */	CALL(sys_sysfs)
-		CALL(sys_personality)
-		CALL(sys_ni_syscall)		/* reserved for afs_syscall */
-		CALL(sys_setfsuid16)
-		CALL(sys_setfsgid16)
-/* 140 */	CALL(sys_llseek)
-		CALL(sys_getdents)
-		CALL(sys_select)
-		CALL(sys_flock)
-		CALL(sys_msync)
-/* 145 */	CALL(sys_readv)
-		CALL(sys_writev)
-		CALL(sys_getsid)
-		CALL(sys_fdatasync)
-		CALL(sys_sysctl)
-/* 150 */	CALL(sys_mlock)
-		CALL(sys_munlock)
-		CALL(sys_mlockall)
-		CALL(sys_munlockall)
-		CALL(sys_sched_setparam)
-/* 155 */	CALL(sys_sched_getparam)
-		CALL(sys_sched_setscheduler)
-		CALL(sys_sched_getscheduler)
-		CALL(sys_sched_yield)
-		CALL(sys_sched_get_priority_max)
-/* 160 */	CALL(sys_sched_get_priority_min)
-		CALL(sys_sched_rr_get_interval)
-		CALL(sys_nanosleep)
-		CALL(sys_mremap)
-		CALL(sys_setresuid16)
-/* 165 */	CALL(sys_getresuid16)
-		CALL(sys_ni_syscall)		/* vm86 */
-		CALL(sys_ni_syscall)		/* was sys_query_module */
-		CALL(sys_poll)
-		CALL(sys_ni_syscall)		/* was nfsservctl */
-/* 170 */	CALL(sys_setresgid16)
-		CALL(sys_getresgid16)
-		CALL(sys_prctl)
-		CALL(sys_rt_sigreturn_wrapper)
-		CALL(sys_rt_sigaction)
-/* 175 */	CALL(sys_rt_sigprocmask)
-		CALL(sys_rt_sigpending)
-		CALL(sys_rt_sigtimedwait)
-		CALL(sys_rt_sigqueueinfo)
-		CALL(sys_rt_sigsuspend)
-/* 180 */	CALL(ABI(sys_pread64, sys_oabi_pread64))
-		CALL(ABI(sys_pwrite64, sys_oabi_pwrite64))
-		CALL(sys_chown16)
-		CALL(sys_getcwd)
-		CALL(sys_capget)
-/* 185 */	CALL(sys_capset)
-		CALL(sys_sigaltstack)
-		CALL(sys_sendfile)
-		CALL(sys_ni_syscall)		/* getpmsg */
-		CALL(sys_ni_syscall)		/* putpmsg */
-/* 190 */	CALL(sys_vfork)
-		CALL(sys_getrlimit)
-		CALL(sys_mmap2)
-		CALL(ABI(sys_truncate64, sys_oabi_truncate64))
-		CALL(ABI(sys_ftruncate64, sys_oabi_ftruncate64))
-/* 195 */	CALL(ABI(sys_stat64, sys_oabi_stat64))
-		CALL(ABI(sys_lstat64, sys_oabi_lstat64))
-		CALL(ABI(sys_fstat64, sys_oabi_fstat64))
-		CALL(sys_lchown)
-		CALL(sys_getuid)
-/* 200 */	CALL(sys_getgid)
-		CALL(sys_geteuid)
-		CALL(sys_getegid)
-		CALL(sys_setreuid)
-		CALL(sys_setregid)
-/* 205 */	CALL(sys_getgroups)
-		CALL(sys_setgroups)
-		CALL(sys_fchown)
-		CALL(sys_setresuid)
-		CALL(sys_getresuid)
-/* 210 */	CALL(sys_setresgid)
-		CALL(sys_getresgid)
-		CALL(sys_chown)
-		CALL(sys_setuid)
-		CALL(sys_setgid)
-/* 215 */	CALL(sys_setfsuid)
-		CALL(sys_setfsgid)
-		CALL(sys_getdents64)
-		CALL(sys_pivot_root)
-		CALL(sys_mincore)
-/* 220 */	CALL(sys_madvise)
-		CALL(ABI(sys_fcntl64, sys_oabi_fcntl64))
-		CALL(sys_ni_syscall) /* TUX */
-		CALL(sys_ni_syscall)
-		CALL(sys_gettid)
-/* 225 */	CALL(ABI(sys_readahead, sys_oabi_readahead))
-		CALL(sys_setxattr)
-		CALL(sys_lsetxattr)
-		CALL(sys_fsetxattr)
-		CALL(sys_getxattr)
-/* 230 */	CALL(sys_lgetxattr)
-		CALL(sys_fgetxattr)
-		CALL(sys_listxattr)
-		CALL(sys_llistxattr)
-		CALL(sys_flistxattr)
-/* 235 */	CALL(sys_removexattr)
-		CALL(sys_lremovexattr)
-		CALL(sys_fremovexattr)
-		CALL(sys_tkill)
-		CALL(sys_sendfile64)
-/* 240 */	CALL(sys_futex)
-		CALL(sys_sched_setaffinity)
-		CALL(sys_sched_getaffinity)
-		CALL(sys_io_setup)
-		CALL(sys_io_destroy)
-/* 245 */	CALL(sys_io_getevents)
-		CALL(sys_io_submit)
-		CALL(sys_io_cancel)
-		CALL(sys_exit_group)
-		CALL(sys_lookup_dcookie)
-/* 250 */	CALL(sys_epoll_create)
-		CALL(ABI(sys_epoll_ctl, sys_oabi_epoll_ctl))
-		CALL(ABI(sys_epoll_wait, sys_oabi_epoll_wait))
-		CALL(sys_remap_file_pages)
-		CALL(sys_ni_syscall)	/* sys_set_thread_area */
-/* 255 */	CALL(sys_ni_syscall)	/* sys_get_thread_area */
-		CALL(sys_set_tid_address)
-		CALL(sys_timer_create)
-		CALL(sys_timer_settime)
-		CALL(sys_timer_gettime)
-/* 260 */	CALL(sys_timer_getoverrun)
-		CALL(sys_timer_delete)
-		CALL(sys_clock_settime)
-		CALL(sys_clock_gettime)
-		CALL(sys_clock_getres)
-/* 265 */	CALL(sys_clock_nanosleep)
-		CALL(sys_statfs64_wrapper)
-		CALL(sys_fstatfs64_wrapper)
-		CALL(sys_tgkill)
-		CALL(sys_utimes)
-/* 270 */	CALL(sys_arm_fadvise64_64)
-		CALL(sys_pciconfig_iobase)
-		CALL(sys_pciconfig_read)
-		CALL(sys_pciconfig_write)
-		CALL(sys_mq_open)
-/* 275 */	CALL(sys_mq_unlink)
-		CALL(sys_mq_timedsend)
-		CALL(sys_mq_timedreceive)
-		CALL(sys_mq_notify)
-		CALL(sys_mq_getsetattr)
-/* 280 */	CALL(sys_waitid)
-		CALL(sys_socket)
-		CALL(ABI(sys_bind, sys_oabi_bind))
-		CALL(ABI(sys_connect, sys_oabi_connect))
-		CALL(sys_listen)
-/* 285 */	CALL(sys_accept)
-		CALL(sys_getsockname)
-		CALL(sys_getpeername)
-		CALL(sys_socketpair)
-		CALL(sys_send)
-/* 290 */	CALL(ABI(sys_sendto, sys_oabi_sendto))
-		CALL(sys_recv)
-		CALL(sys_recvfrom)
-		CALL(sys_shutdown)
-		CALL(sys_setsockopt)
-/* 295 */	CALL(sys_getsockopt)
-		CALL(ABI(sys_sendmsg, sys_oabi_sendmsg))
-		CALL(sys_recvmsg)
-		CALL(ABI(sys_semop, sys_oabi_semop))
-		CALL(sys_semget)
-/* 300 */	CALL(sys_semctl)
-		CALL(sys_msgsnd)
-		CALL(sys_msgrcv)
-		CALL(sys_msgget)
-		CALL(sys_msgctl)
-/* 305 */	CALL(sys_shmat)
-		CALL(sys_shmdt)
-		CALL(sys_shmget)
-		CALL(sys_shmctl)
-		CALL(sys_add_key)
-/* 310 */	CALL(sys_request_key)
-		CALL(sys_keyctl)
-		CALL(ABI(sys_semtimedop, sys_oabi_semtimedop))
-/* vserver */	CALL(sys_ni_syscall)
-		CALL(sys_ioprio_set)
-/* 315 */	CALL(sys_ioprio_get)
-		CALL(sys_inotify_init)
-		CALL(sys_inotify_add_watch)
-		CALL(sys_inotify_rm_watch)
-		CALL(sys_mbind)
-/* 320 */	CALL(sys_get_mempolicy)
-		CALL(sys_set_mempolicy)
-		CALL(sys_openat)
-		CALL(sys_mkdirat)
-		CALL(sys_mknodat)
-/* 325 */	CALL(sys_fchownat)
-		CALL(sys_futimesat)
-		CALL(ABI(sys_fstatat64,  sys_oabi_fstatat64))
-		CALL(sys_unlinkat)
-		CALL(sys_renameat)
-/* 330 */	CALL(sys_linkat)
-		CALL(sys_symlinkat)
-		CALL(sys_readlinkat)
-		CALL(sys_fchmodat)
-		CALL(sys_faccessat)
-/* 335 */	CALL(sys_pselect6)
-		CALL(sys_ppoll)
-		CALL(sys_unshare)
-		CALL(sys_set_robust_list)
-		CALL(sys_get_robust_list)
-/* 340 */	CALL(sys_splice)
-		CALL(sys_sync_file_range2)
-		CALL(sys_tee)
-		CALL(sys_vmsplice)
-		CALL(sys_move_pages)
-/* 345 */	CALL(sys_getcpu)
-		CALL(sys_epoll_pwait)
-		CALL(sys_kexec_load)
-		CALL(sys_utimensat)
-		CALL(sys_signalfd)
-/* 350 */	CALL(sys_timerfd_create)
-		CALL(sys_eventfd)
-		CALL(sys_fallocate)
-		CALL(sys_timerfd_settime)
-		CALL(sys_timerfd_gettime)
-/* 355 */	CALL(sys_signalfd4)
-		CALL(sys_eventfd2)
-		CALL(sys_epoll_create1)
-		CALL(sys_dup3)
-		CALL(sys_pipe2)
-/* 360 */	CALL(sys_inotify_init1)
-		CALL(sys_preadv)
-		CALL(sys_pwritev)
-		CALL(sys_rt_tgsigqueueinfo)
-		CALL(sys_perf_event_open)
-/* 365 */	CALL(sys_recvmmsg)
-		CALL(sys_accept4)
-		CALL(sys_fanotify_init)
-		CALL(sys_fanotify_mark)
-		CALL(sys_prlimit64)
-/* 370 */	CALL(sys_name_to_handle_at)
-		CALL(sys_open_by_handle_at)
-		CALL(sys_clock_adjtime)
-		CALL(sys_syncfs)
-		CALL(sys_sendmmsg)
-/* 375 */	CALL(sys_setns)
-		CALL(sys_process_vm_readv)
-		CALL(sys_process_vm_writev)
-		CALL(sys_kcmp)
-		CALL(sys_finit_module)
-/* 380 */	CALL(sys_sched_setattr)
-		CALL(sys_sched_getattr)
-		CALL(sys_renameat2)
-		CALL(sys_seccomp)
-		CALL(sys_getrandom)
-/* 385 */	CALL(sys_memfd_create)
-		CALL(sys_bpf)
-		CALL(sys_execveat)
-		CALL(sys_userfaultfd)
-		CALL(sys_membarrier)
-/* 390 */	CALL(sys_mlock2)
-		CALL(sys_copy_file_range)
-		CALL(sys_preadv2)
-		CALL(sys_pwritev2)
-		CALL(sys_pkey_mprotect)
-/* 395 */	CALL(sys_pkey_alloc)
-		CALL(sys_pkey_free)
-#ifndef syscalls_counted
-.equ syscalls_padding, ((NR_syscalls + 3) & ~3) - NR_syscalls
-#define syscalls_counted
-#endif
-.rept syscalls_padding
-		CALL(sys_ni_syscall)
-.endr
diff --git a/arch/arm/kernel/entry-common.S b/arch/arm/kernel/entry-common.S
index 10c3283d6c19..eb5cd77bf1d8 100644
--- a/arch/arm/kernel/entry-common.S
+++ b/arch/arm/kernel/entry-common.S
@@ -12,6 +12,11 @@
 #include <asm/unistd.h>
 #include <asm/ftrace.h>
 #include <asm/unwind.h>
+#ifdef CONFIG_AEABI
+#include <asm/unistd-oabi.h>
+#endif
+
+	.equ	NR_syscalls, __NR_syscalls
 
 #ifdef CONFIG_NEED_RET_TO_USER
 #include <mach/entry-macro.S>
@@ -120,21 +125,6 @@ ENTRY(ret_from_fork)
 	b	ret_slow_syscall
 ENDPROC(ret_from_fork)
 
-	.equ NR_syscalls,0
-#define CALL(x) .equ NR_syscalls,NR_syscalls+1
-#include "calls.S"
-
-/*
- * Ensure that the system call table is equal to __NR_syscalls,
- * which is the value the rest of the system sees
- */
-.ifne NR_syscalls - __NR_syscalls
-.error "__NR_syscalls is not equal to the size of the syscall table"
-.endif
-
-#undef CALL
-#define CALL(x) .long x
-
 /*=============================================================================
  * SWI handler
  *-----------------------------------------------------------------------------
@@ -291,22 +281,48 @@ __cr_alignment:
 #endif
 	.ltorg
 
+	.macro	syscall_table_start, sym
+	.equ	__sys_nr, 0
+	.type	\sym, #object
+ENTRY(\sym)
+	.endm
+
+	.macro	syscall, nr, func
+	.ifgt	__sys_nr - \nr
+	.error	"Duplicated/unorded system call entry"
+	.endif
+	.rept	\nr - __sys_nr
+	.long	sys_ni_syscall
+	.endr
+	.long	\func
+	.equ	__sys_nr, \nr + 1
+	.endm
+
+	.macro	syscall_table_end, sym
+	.ifgt	__sys_nr - __NR_syscalls
+	.error	"System call table too big"
+	.endif
+	.rept	__NR_syscalls - __sys_nr
+	.long	sys_ni_syscall
+	.endr
+	.size	\sym, . - \sym
+	.endm
+
+#define NATIVE(nr, func) syscall nr, func
+
 /*
  * This is the syscall table declaration for native ABI syscalls.
  * With EABI a couple syscalls are obsolete and defined as sys_ni_syscall.
  */
-#define ABI(native, compat) native
+	syscall_table_start sys_call_table
+#define COMPAT(nr, native, compat) syscall nr, native
 #ifdef CONFIG_AEABI
-#define OBSOLETE(syscall) sys_ni_syscall
+#include <calls-eabi.S>
 #else
-#define OBSOLETE(syscall) syscall
+#include <calls-oabi.S>
 #endif
-
-	.type	sys_call_table, #object
-ENTRY(sys_call_table)
-#include "calls.S"
-#undef ABI
-#undef OBSOLETE
+#undef COMPAT
+	syscall_table_end sys_call_table
 
 /*============================================================================
  * Special system call wrappers
@@ -407,14 +423,10 @@ ENDPROC(sys_oabi_readahead)
  * Let's declare a second syscall table for old ABI binaries
  * using the compatibility syscall entries.
  */
-#define ABI(native, compat) compat
-#define OBSOLETE(syscall) syscall
-
-	.type	sys_oabi_call_table, #object
-ENTRY(sys_oabi_call_table)
-#include "calls.S"
-#undef ABI
-#undef OBSOLETE
+	syscall_table_start sys_oabi_call_table
+#define COMPAT(nr, native, compat) syscall nr, compat
+#include <calls-oabi.S>
+	syscall_table_end sys_oabi_call_table
 
 #endif
 
diff --git a/arch/arm/kernel/topology.c b/arch/arm/kernel/topology.c
index ec279d161b32..ebf47d91b804 100644
--- a/arch/arm/kernel/topology.c
+++ b/arch/arm/kernel/topology.c
@@ -12,6 +12,7 @@
  */
 
 #include <linux/cpu.h>
+#include <linux/cpufreq.h>
 #include <linux/cpumask.h>
 #include <linux/export.h>
 #include <linux/init.h>
@@ -21,7 +22,9 @@
 #include <linux/of.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
+#include <linux/string.h>
 
+#include <asm/cpu.h>
 #include <asm/cputype.h>
 #include <asm/topology.h>
 
@@ -41,6 +44,7 @@
  * updated during this sequence.
  */
 static DEFINE_PER_CPU(unsigned long, cpu_scale) = SCHED_CAPACITY_SCALE;
+static DEFINE_MUTEX(cpu_scale_mutex);
 
 unsigned long arch_scale_cpu_capacity(struct sched_domain *sd, int cpu)
 {
@@ -52,6 +56,65 @@ static void set_capacity_scale(unsigned int cpu, unsigned long capacity)
 	per_cpu(cpu_scale, cpu) = capacity;
 }
 
+#ifdef CONFIG_PROC_SYSCTL
+static ssize_t cpu_capacity_show(struct device *dev,
+				 struct device_attribute *attr,
+				 char *buf)
+{
+	struct cpu *cpu = container_of(dev, struct cpu, dev);
+
+	return sprintf(buf, "%lu\n",
+			arch_scale_cpu_capacity(NULL, cpu->dev.id));
+}
+
+static ssize_t cpu_capacity_store(struct device *dev,
+				  struct device_attribute *attr,
+				  const char *buf,
+				  size_t count)
+{
+	struct cpu *cpu = container_of(dev, struct cpu, dev);
+	int this_cpu = cpu->dev.id, i;
+	unsigned long new_capacity;
+	ssize_t ret;
+
+	if (count) {
+		ret = kstrtoul(buf, 0, &new_capacity);
+		if (ret)
+			return ret;
+		if (new_capacity > SCHED_CAPACITY_SCALE)
+			return -EINVAL;
+
+		mutex_lock(&cpu_scale_mutex);
+		for_each_cpu(i, &cpu_topology[this_cpu].core_sibling)
+			set_capacity_scale(i, new_capacity);
+		mutex_unlock(&cpu_scale_mutex);
+	}
+
+	return count;
+}
+
+static DEVICE_ATTR_RW(cpu_capacity);
+
+static int register_cpu_capacity_sysctl(void)
+{
+	int i;
+	struct device *cpu;
+
+	for_each_possible_cpu(i) {
+		cpu = get_cpu_device(i);
+		if (!cpu) {
+			pr_err("%s: too early to get CPU%d device!\n",
+			       __func__, i);
+			continue;
+		}
+		device_create_file(cpu, &dev_attr_cpu_capacity);
+	}
+
+	return 0;
+}
+subsys_initcall(register_cpu_capacity_sysctl);
+#endif
+
 #ifdef CONFIG_OF
 struct cpu_efficiency {
 	const char *compatible;
@@ -78,6 +141,146 @@ static unsigned long *__cpu_capacity;
 #define cpu_capacity(cpu)	__cpu_capacity[cpu]
 
 static unsigned long middle_capacity = 1;
+static bool cap_from_dt = true;
+static u32 *raw_capacity;
+static bool cap_parsing_failed;
+static u32 capacity_scale;
+
+static int __init parse_cpu_capacity(struct device_node *cpu_node, int cpu)
+{
+	int ret = 1;
+	u32 cpu_capacity;
+
+	if (cap_parsing_failed)
+		return !ret;
+
+	ret = of_property_read_u32(cpu_node,
+				   "capacity-dmips-mhz",
+				   &cpu_capacity);
+	if (!ret) {
+		if (!raw_capacity) {
+			raw_capacity = kcalloc(num_possible_cpus(),
+					       sizeof(*raw_capacity),
+					       GFP_KERNEL);
+			if (!raw_capacity) {
+				pr_err("cpu_capacity: failed to allocate memory for raw capacities\n");
+				cap_parsing_failed = true;
+				return !ret;
+			}
+		}
+		capacity_scale = max(cpu_capacity, capacity_scale);
+		raw_capacity[cpu] = cpu_capacity;
+		pr_debug("cpu_capacity: %s cpu_capacity=%u (raw)\n",
+			cpu_node->full_name, raw_capacity[cpu]);
+	} else {
+		if (raw_capacity) {
+			pr_err("cpu_capacity: missing %s raw capacity\n",
+				cpu_node->full_name);
+			pr_err("cpu_capacity: partial information: fallback to 1024 for all CPUs\n");
+		}
+		cap_parsing_failed = true;
+		kfree(raw_capacity);
+	}
+
+	return !ret;
+}
+
+static void normalize_cpu_capacity(void)
+{
+	u64 capacity;
+	int cpu;
+
+	if (!raw_capacity || cap_parsing_failed)
+		return;
+
+	pr_debug("cpu_capacity: capacity_scale=%u\n", capacity_scale);
+	mutex_lock(&cpu_scale_mutex);
+	for_each_possible_cpu(cpu) {
+		capacity = (raw_capacity[cpu] << SCHED_CAPACITY_SHIFT)
+			/ capacity_scale;
+		set_capacity_scale(cpu, capacity);
+		pr_debug("cpu_capacity: CPU%d cpu_capacity=%lu\n",
+			cpu, arch_scale_cpu_capacity(NULL, cpu));
+	}
+	mutex_unlock(&cpu_scale_mutex);
+}
+
+#ifdef CONFIG_CPU_FREQ
+static cpumask_var_t cpus_to_visit;
+static bool cap_parsing_done;
+static void parsing_done_workfn(struct work_struct *work);
+static DECLARE_WORK(parsing_done_work, parsing_done_workfn);
+
+static int
+init_cpu_capacity_callback(struct notifier_block *nb,
+			   unsigned long val,
+			   void *data)
+{
+	struct cpufreq_policy *policy = data;
+	int cpu;
+
+	if (cap_parsing_failed || cap_parsing_done)
+		return 0;
+
+	switch (val) {
+	case CPUFREQ_NOTIFY:
+		pr_debug("cpu_capacity: init cpu capacity for CPUs [%*pbl] (to_visit=%*pbl)\n",
+				cpumask_pr_args(policy->related_cpus),
+				cpumask_pr_args(cpus_to_visit));
+		cpumask_andnot(cpus_to_visit,
+			       cpus_to_visit,
+			       policy->related_cpus);
+		for_each_cpu(cpu, policy->related_cpus) {
+			raw_capacity[cpu] = arch_scale_cpu_capacity(NULL, cpu) *
+					    policy->cpuinfo.max_freq / 1000UL;
+			capacity_scale = max(raw_capacity[cpu], capacity_scale);
+		}
+		if (cpumask_empty(cpus_to_visit)) {
+			normalize_cpu_capacity();
+			kfree(raw_capacity);
+			pr_debug("cpu_capacity: parsing done\n");
+			cap_parsing_done = true;
+			schedule_work(&parsing_done_work);
+		}
+	}
+	return 0;
+}
+
+static struct notifier_block init_cpu_capacity_notifier = {
+	.notifier_call = init_cpu_capacity_callback,
+};
+
+static int __init register_cpufreq_notifier(void)
+{
+	if (cap_parsing_failed)
+		return -EINVAL;
+
+	if (!alloc_cpumask_var(&cpus_to_visit, GFP_KERNEL)) {
+		pr_err("cpu_capacity: failed to allocate memory for cpus_to_visit\n");
+		return -ENOMEM;
+	}
+	cpumask_copy(cpus_to_visit, cpu_possible_mask);
+
+	return cpufreq_register_notifier(&init_cpu_capacity_notifier,
+					 CPUFREQ_POLICY_NOTIFIER);
+}
+core_initcall(register_cpufreq_notifier);
+
+static void parsing_done_workfn(struct work_struct *work)
+{
+	cpufreq_unregister_notifier(&init_cpu_capacity_notifier,
+					 CPUFREQ_POLICY_NOTIFIER);
+}
+
+#else
+static int __init free_raw_capacity(void)
+{
+	kfree(raw_capacity);
+
+	return 0;
+}
+core_initcall(free_raw_capacity);
+#endif
 
 /*
  * Iterate all CPUs' descriptor in DT and compute the efficiency
@@ -99,6 +302,12 @@ static void __init parse_dt_topology(void)
 	__cpu_capacity = kcalloc(nr_cpu_ids, sizeof(*__cpu_capacity),
 				 GFP_NOWAIT);
 
+	cn = of_find_node_by_path("/cpus");
+	if (!cn) {
+		pr_err("No CPU information found in DT\n");
+		return;
+	}
+
 	for_each_possible_cpu(cpu) {
 		const u32 *rate;
 		int len;
@@ -110,6 +319,13 @@ static void __init parse_dt_topology(void)
 			continue;
 		}
 
+		if (parse_cpu_capacity(cn, cpu)) {
+			of_node_put(cn);
+			continue;
+		}
+
+		cap_from_dt = false;
+
 		for (cpu_eff = table_efficiency; cpu_eff->compatible; cpu_eff++)
 			if (of_device_is_compatible(cn, cpu_eff->compatible))
 				break;
@@ -151,6 +367,8 @@ static void __init parse_dt_topology(void)
 		middle_capacity = ((max_capacity / 3)
 				>> (SCHED_CAPACITY_SHIFT-1)) + 1;
 
+	if (cap_from_dt && !cap_parsing_failed)
+		normalize_cpu_capacity();
 }
 
 /*
@@ -160,7 +378,7 @@ static void __init parse_dt_topology(void)
  */
 static void update_cpu_capacity(unsigned int cpu)
 {
-	if (!cpu_capacity(cpu))
+	if (!cpu_capacity(cpu) || cap_from_dt)
 		return;
 
 	set_capacity_scale(cpu, cpu_capacity(cpu) / middle_capacity);