Commit Graph

334 Commits

Author SHA1 Message Date
Linus Torvalds eaa0eda562 asm-generic: uaccess.h cleanup
Like in 3.19, I once more have a multi-stage cleanup for one asm-generic
 header file, this time the work was done by Michael Tsirkin and cleans
 up the uaccess.h file in asm-generic, as well as all architectures for
 which the respective maintainers did not pick up his patches directly.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIVAwUAVONFpmCrR//JCVInAQIoYRAA1T3ID1bQLqdi8TU1X+vzutXzGFRhRFii
 u18GYeN6sGTcfqQD0GsNSaH7G8XehF3cgJ9eo4h9YkRPIG/0T0FO+dqdB0uRh8iy
 GKcUqVhgvCFpOBDUJC6FgMvgWWyVrgSUBqG6qSXck/PDcMSsUa/m/GcLhR/sHWGn
 EGEAzYNvJgdOaJ1z0vfPFK6mPwFwmYzIss5XFuoBAKKN856fBlxofkQqdpKjGDFH
 n0UziaJ5tbCdlZ9M9Y5JN9RU8yBCcOmGHnHUAQHz3BXOt9sD7o5jDuzsUbj+vUGJ
 gzNc8kee9Pyy8ZA1F959gspaxe5Oumq7NLgs3HDjK6ZDRKpJvZb6iXi56f15chlZ
 dItTbFSxCHOFs0d8XJKNbmPt44pJ/qKO+03lMIGttMkIm7hXfvyMWSPZV9G0Pu1y
 zbWEDgW2Mdrdt0saNSD46IEp+c7E5P3D9JSctQRdQjReoCbOHwqrSHi1Zeg97XL4
 I1E0KwDqFUw3P1dXr5ahXmR50ZigBGjN5Fz3N7GmJt2x4PRSS2Sw92hyCrL0YM8J
 56FdRA7UJ0V/SzmAko3F5wWmhabc6L+qrVA42R6U3SNSjU8hwppOkYKDINNhPZfL
 SGy1oQS6Jj10WxLOVp66NC7XxXzBybDcQnatz4XtNN8P5sfekUGSGBeMyMsHl7IJ
 9MT3xym+DWU=
 =LROx
 -----END PGP SIGNATURE-----

Merge tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic uaccess.h cleanup from Arnd Bergmann:
 "Like in 3.19, I once more have a multi-stage cleanup for one
  asm-generic header file, this time the work was done by Michael
  Tsirkin and cleans up the uaccess.h file in asm-generic, as well as
  all architectures for which the respective maintainers did not pick up
  his patches directly"

* tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (37 commits)
  sparc32: nocheck uaccess coding style tweaks
  sparc64: nocheck uaccess coding style tweaks
  xtensa: macro whitespace fixes
  sh: macro whitespace fixes
  parisc: macro whitespace fixes
  m68k: macro whitespace fixes
  m32r: macro whitespace fixes
  frv: macro whitespace fixes
  cris: macro whitespace fixes
  avr32: macro whitespace fixes
  arm64: macro whitespace fixes
  arm: macro whitespace fixes
  alpha: macro whitespace fixes
  blackfin: macro whitespace fixes
  sparc64: uaccess_64 macro whitespace fixes
  sparc32: uaccess_32 macro whitespace fixes
  avr32: whitespace fix
  sh: fix put_user sparse errors
  metag: fix put_user sparse errors
  ia64: fix put_user sparse errors
  ...
2015-02-18 10:02:24 -08:00
Andy Lutomirski f56141e3e2 all arches, signal: move restart_block to struct task_struct
If an attacker can cause a controlled kernel stack overflow, overwriting
the restart block is a very juicy exploit target.  This is because the
restart_block is held in the same memory allocation as the kernel stack.

Moving the restart block to struct task_struct prevents this exploit by
making the restart_block harder to locate.

Note that there are other fields in thread_info that are also easy
targets, at least on some architectures.

It's also a decent simplification, since the restart code is more or less
identical on all architectures.

[james.hogan@imgtec.com: metag: align thread_info::supervisor_stack]
Signed-off-by: Andy Lutomirski <luto@amacapital.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Kees Cook <keescook@chromium.org>
Cc: David Miller <davem@davemloft.net>
Acked-by: Richard Weinberger <richard@nod.at>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Mark Salter <msalter@redhat.com>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Helge Deller <deller@gmx.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Tested-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Chen Liqin <liqin.linux@gmail.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Chris Metcalf <cmetcalf@ezchip.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-12 18:54:12 -08:00
Kirill A. Shutemov d016bf7ece mm: make FIRST_USER_ADDRESS unsigned long on all archs
LKP has triggered a compiler warning after my recent patch "mm: account
pmd page tables to the process":

    mm/mmap.c: In function 'exit_mmap':
 >> mm/mmap.c:2857:2: warning: right shift count >= width of type [enabled by default]

The code:

 > 2857                WARN_ON(mm_nr_pmds(mm) >
   2858                                round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT);

In this, on tile, we have FIRST_USER_ADDRESS defined as 0.  round_up() has
the same type -- int.  PUD_SHIFT.

I think the best way to fix it is to define FIRST_USER_ADDRESS as unsigned
long.  On every arch for consistency.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-11 17:06:03 -08:00
Kirill A. Shutemov d9ecee281b xtensa: drop _PAGE_FILE and pte_file()-related helpers
We've replaced remap_file_pages(2) implementation with emulation.  Nobody
creates non-linear mapping anymore.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-02-10 14:30:33 -08:00
Michael S. Tsirkin 33a3dcc228 xtensa: macro whitespace fixes
While working on arch/xtensa/include/asm/uaccess.h, I noticed
that some macros within this header are made harder to read because they
violate a coding style rule: space is missing after comma.

Fix it up.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
2015-01-13 15:24:10 +02:00
Linus Torvalds a643fc7253 Xtensa fixes for 3.19:
- fix nommu support;
 - remove s6000 variant and s6105 platform.
 - fix permissions for kmapped pages so that copy_to_user_page works with them.
 - add power management menu to Kconfig to allow use of runtime PM.
 - disable linker optimizations because of a linker bug.
 - fix sparse error.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIcBAABAgAGBQJUj+PnAAoJEI9vqH3mFV2s13sP/iNDjBFhYLkPTTTdLKcLwMoS
 ZfWKsKmmmbvSTAN2rpzdRt45hcDpukAbtxBh7zKoIz2w8jnCBVWEWos9J8Wefy4X
 WHuMm8QsQ5dK57F6I36db2ET1cJUlgAKnXUykd8w1HY/9QEUCa1FoAYiIQjQoMDA
 6X6ZvXI4tuneMpE+Hz1xsFxkyY1HOPULnlKHbplaDZtXZ9GCrYMD6t6h5BbpvLmk
 WoSx2aPJvoNIaQgLBNAqDZ7vGd3AaPgztQTho0hWvja9DRECzkjEZoZ5OFwzDl/f
 YGmaY4Vd+RNlhDKBUiqv7KVwPIv6jJwSYQXOYnMBtgr6JSfs8R/0yiylmj9FK/Wb
 f+t3gG9/iFfKNZ7uKDp6uqGUJVQe2tUBFQIFFVpQ7knLy1b7ZYHQm8k+kugBX41+
 4JJcTY7F+SiFLCqinKnstKiLjt9GzPrjPXRNoJ6bcpC0RGY8Eem6hCogSepgEH1w
 E0Wh3E0HMgoQR6rnXpaDHx9ld0zcZkBymVSwQCP89mXbAhxlIV511USmoNaYeJm/
 u6kXyyrvvDrOmSoAufeWf53AV2AxLY6fGRPjCoME4I/qJOyFOdNuuMLv3Emjq+m4
 1bw1BoPVMAXCdRdt8pR1uzsbKyaS4KOZbDP6+p3TTG2L0YJFJ6iJ8hAey9rtEy5Y
 HZqGD4j1ZzWqwfTwz94F
 =ePa2
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-next-20141215' of git://github.com/czankel/xtensa-linux

Pull Xtensa fixes from Chris Zankel:
 - fix nommu support
 - remove s6000 variant and s6105 platform
 - fix permissions for kmapped pages so that copy_to_user_page works with them
 - add power management menu to Kconfig to allow use of runtime PM
 - disable linker optimizations because of a linker bug
 - fix sparse error

* tag 'xtensa-next-20141215' of git://github.com/czankel/xtensa-linux:
  xtensa: disable link optimization
  xtensa/uaccess: fix sparse errors
  xtensa: fix kmap_prot definition
  xtensa: add power management menu to Kconfig
  xtensa: remove s6000 variant and s6105 platform
  xtensa: make PLATFORM_DEFAULT_MEM parameters configurable
  xtensa: nommu: clean up memory map dump
  xtensa: nommu: reserve memory below PLATFORM_DEFAULT_MEM_START
  xtensa: nommu: set up cache and atomctl in initialize_mmu
  xtensa: move vecbase SR initialization to _startup
  xtensa: nommu: fix uImage load address
  xtensa: nommu: fix load address definitions
  xtensa: nommu: fix Image.elf reset code and ld script
  xtensa: nommu: add MMU dependency to DEBUG_TLB_SANITY
  xtensa: nommu: don't build most of the cache flushing code
  xtensa: nommu: don't provide arch_get_unmapped_area
  xtensa: nommu: provide MAP_UNINITIALIZED definition
  xtensa: nommu: provide _PAGE_CHG_MASK definition
  xtensa: nommu: provide __invalidate_dcache_page_alias stub
  xtensa: nommu: move init_mmu stub to nommu_context.h
2014-12-16 14:08:53 -08:00
Michael S. Tsirkin 4255a8e199 xtensa/uaccess: fix sparse errors
virtio wants to read bitwise types from userspace using get_user.  At the
moment this triggers sparse errors, since the value is passed through an
integer.

Fix that up using __force.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
2014-12-15 20:14:26 -08:00
Chris Zankel 2cb54e8493 Xtensa improvements for 3.19:
- fix permissions for kmapped pages so that copy_to_user_page works with
   them;
 - add power management menu to Kconfig to allow use of runtime PM.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJUi7VsAAoJEFH5zJH4P6BEpS8P/jsHzgGyaCmvr8MI+I6wImIt
 orEhkxOYQS4aBAi/azupTPYbu8r2I8+yscWtFxBnvJok3rT2yMtSJZFLUhur0nG4
 DQwQduMeHbzSC4ADqJBalfaOfpcwz/GQoM6IPVZEEW6h4vzCvUm0O1Wq5Z1Thbg2
 skMmVFIX2+YTwUrEKMEqbl1JevNzNH53t/tlTgiXOMkZWwL1R4ToRsFHv9zpIJ1m
 Srm0BWAXAM+h1vx1Pv2vwmTcgPj3MdBccsla/HAybeQraqThdlgAz9Cnk5T5AdWE
 6rLy9mw+LiT1kXnbl4Z526NBzvkf+5+xYiGqI3UwohhFEChq74PBPQnZlpZ2AGlG
 dI/i9CoV0uQgU3rRDvS9NNFXXW59objKIu8f2Od5pS4kgV+mPjKePVTJbchXIf5n
 MC7Dq2GcM8jK4/Q32aHNxDi9jM3jukd7pJHbyxOo0g1SpmSEnNSJ+CcOV5ft6nLB
 xIohvVXg8Om976Xbl6eRii7lNdCZm8j7mDNMl37lwaqitIgZmlGeRhAyYCnjC1Pl
 mxtORfQbGfUHw/o8TlhyINBNQdpLr0CRTL4HCrMyiDDQ0mJH3bMBKuSk7y0Qe8DG
 aJ8Om29CKvawr3irehNRsZiSfoqiPG6F/GzfFxfgSut/AKAMI25kMSoGZCjBMhHn
 76+jWe4WzygZCAUWzmsl
 =9vUt
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-for-next-20141213' of git://github.com/jcmvbkbc/linux-xtensa into for_next

Xtensa improvements for 3.19:

- fix permissions for kmapped pages so that copy_to_user_page works with
  them;
- add power management menu to Kconfig to allow use of runtime PM.
2014-12-15 20:10:39 -08:00
Linus Torvalds 70e71ca0af Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
Pull networking updates from David Miller:

 1) New offloading infrastructure and example 'rocker' driver for
    offloading of switching and routing to hardware.

    This work was done by a large group of dedicated individuals, not
    limited to: Scott Feldman, Jiri Pirko, Thomas Graf, John Fastabend,
    Jamal Hadi Salim, Andy Gospodarek, Florian Fainelli, Roopa Prabhu

 2) Start making the networking operate on IOV iterators instead of
    modifying iov objects in-situ during transfers.  Thanks to Al Viro
    and Herbert Xu.

 3) A set of new netlink interfaces for the TIPC stack, from Richard
    Alpe.

 4) Remove unnecessary looping during ipv6 routing lookups, from Martin
    KaFai Lau.

 5) Add PAUSE frame generation support to gianfar driver, from Matei
    Pavaluca.

 6) Allow for larger reordering levels in TCP, which are easily
    achievable in the real world right now, from Eric Dumazet.

 7) Add a variable of napi_schedule that doesn't need to disable cpu
    interrupts, from Eric Dumazet.

 8) Use a doubly linked list to optimize neigh_parms_release(), from
    Nicolas Dichtel.

 9) Various enhancements to the kernel BPF verifier, and allow eBPF
    programs to actually be attached to sockets.  From Alexei
    Starovoitov.

10) Support TSO/LSO in sunvnet driver, from David L Stevens.

11) Allow controlling ECN usage via routing metrics, from Florian
    Westphal.

12) Remote checksum offload, from Tom Herbert.

13) Add split-header receive, BQL, and xmit_more support to amd-xgbe
    driver, from Thomas Lendacky.

14) Add MPLS support to openvswitch, from Simon Horman.

15) Support wildcard tunnel endpoints in ipv6 tunnels, from Steffen
    Klassert.

16) Do gro flushes on a per-device basis using a timer, from Eric
    Dumazet.  This tries to resolve the conflicting goals between the
    desired handling of bulk vs.  RPC-like traffic.

17) Allow userspace to ask for the CPU upon what a packet was
    received/steered, via SO_INCOMING_CPU.  From Eric Dumazet.

18) Limit GSO packets to half the current congestion window, from Eric
    Dumazet.

19) Add a generic helper so that all drivers set their RSS keys in a
    consistent way, from Eric Dumazet.

20) Add xmit_more support to enic driver, from Govindarajulu
    Varadarajan.

21) Add VLAN packet scheduler action, from Jiri Pirko.

22) Support configurable RSS hash functions via ethtool, from Eyal
    Perry.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1820 commits)
  Fix race condition between vxlan_sock_add and vxlan_sock_release
  net/macb: fix compilation warning for print_hex_dump() called with skb->mac_header
  net/mlx4: Add support for A0 steering
  net/mlx4: Refactor QUERY_PORT
  net/mlx4_core: Add explicit error message when rule doesn't meet configuration
  net/mlx4: Add A0 hybrid steering
  net/mlx4: Add mlx4_bitmap zone allocator
  net/mlx4: Add a check if there are too many reserved QPs
  net/mlx4: Change QP allocation scheme
  net/mlx4_core: Use tasklet for user-space CQ completion events
  net/mlx4_core: Mask out host side virtualization features for guests
  net/mlx4_en: Set csum level for encapsulated packets
  be2net: Export tunnel offloads only when a VxLAN tunnel is created
  gianfar: Fix dma check map error when DMA_API_DEBUG is enabled
  cxgb4/csiostor: Don't use MASTER_MUST for fw_hello call
  net: fec: only enable mdio interrupt before phy device link up
  net: fec: clear all interrupt events to support i.MX6SX
  net: fec: reset fep link status in suspend function
  net: sock: fix access via invalid file descriptor
  net: introduce helper macro for_each_cmsghdr
  ...
2014-12-11 14:27:06 -08:00
Daniel Borkmann 0cb6c969ed net, lib: kill arch_fast_hash library bits
As there are now no remaining users of arch_fast_hash(), lets kill
it entirely.

This basically reverts commit 71ae8aac3e ("lib: introduce arch
optimized hash library") and follow-up work, that is f.e., commit
237217546d ("lib: hash: follow-up fixups for arch hash"),
commit e3fec2f74f ("lib: Add missing arch generic-y entries for
asm-generic/hash.h") and last but not least commit 6a02652df5
("perf tools: Fix include for non x86 architectures").

Cc: Francesco Fusco <fusco@ntop.org>
Cc: Thomas Graf <tgraf@suug.ch>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-10 15:17:46 -05:00
Linus Torvalds a0e4467726 asm-generic: asm/io.h rewrite
While there normally is no reason to have a pull request for asm-generic
 but have all changes get merged through whichever tree needs them, I do
 have a series for 3.19. There are two sets of patches that change
 significant portions of asm/io.h, and this branch contains both in order
 to resolve the conflicts:
 
 - Will Deacon has done a set of patches to ensure that all architectures
   define {read,write}{b,w,l,q}_relaxed() functions or get them by
   including asm-generic/io.h. These functions are commonly used on ARM
   specific drivers to avoid expensive L2 cache synchronization implied by
   the normal {read,write}{b,w,l,q}, but we need to define them on all
   architectures in order to share the drivers across architectures and
   to enable CONFIG_COMPILE_TEST configurations for them
 
 - Thierry Reding has done an unrelated set of patches that extends
   the asm-generic/io.h file to the degree necessary to make it useful
   on ARM64 and potentially other architectures.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.12 (GNU/Linux)
 
 iQIVAwUAVIdwNmCrR//JCVInAQJWuw/9FHt2ThMnI1J1Jqy4CVwtyjWTSa6Y/uVj
 xSytS7AOvmU/nw1quSoba5mN9fcUQUtK9kqjqNcq71WsQcDE6BF9SFpi9cWtjWcI
 ZfWsC+5kqry/mbnuHefENipem9RqBrLbOBJ3LARf5M8rZJuTz1KbdZs9r9+1QsCX
 ou8jeqVvNKUn9J1WyekJBFSrPOtZ4bCUpeyh23JHRfPtJeAHNOuPuymj6WceAz98
 uMV1icRaCBMySsf9HgsHRYW5HwuCm3MrrYj6ukyPpgxYz7FRq4hJLDs6GnlFtAGb
 71g87NpFdB32qbW+y1ntfYaJyUryMHMVHBWcV5H9m0btdHTRHYZjoOGOPuyLHHO8
 +l4/FaOQhnDL8cNDj0HKfhdlyaFylcWgs1wzj68nv31c1dGjcJcQiyCDwry9mJhr
 erh4EewcerUvWzbBMQ4JP1f8syKMsKwbo1bVU61a1RQJxEqVCzJMLweGSOFmqMX2
 6E4ZJVWv81UFLoFTzYx+7+M45K4NWywKNQdzwKmqKHc4OQyvq4ALJI0A7SGFJdDR
 HJ7VqDiLaSdBitgJcJUxNzKcyXij6wE9jE1fBe3YDFE4LrnZXFVLN+MX6hs7AIFJ
 vJM1UpxRxQUMGIH2m7rbDNazOAsvQGxINOjNor23cNLuf6qLY1LrpHVPQDAfJVvA
 6tROM77bwIQ=
 =xUv6
 -----END PGP SIGNATURE-----

Merge tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic

Pull asm-generic asm/io.h rewrite from Arnd Bergmann:
 "While there normally is no reason to have a pull request for
  asm-generic but have all changes get merged through whichever tree
  needs them, I do have a series for 3.19.

  There are two sets of patches that change significant portions of
  asm/io.h, and this branch contains both in order to resolve the
  conflicts:

   - Will Deacon has done a set of patches to ensure that all
     architectures define {read,write}{b,w,l,q}_relaxed() functions or
     get them by including asm-generic/io.h.

     These functions are commonly used on ARM specific drivers to avoid
     expensive L2 cache synchronization implied by the normal
     {read,write}{b,w,l,q}, but we need to define them on all
     architectures in order to share the drivers across architectures
     and to enable CONFIG_COMPILE_TEST configurations for them

   - Thierry Reding has done an unrelated set of patches that extends
     the asm-generic/io.h file to the degree necessary to make it useful
     on ARM64 and potentially other architectures"

* tag 'asm-generic-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (29 commits)
  ARM64: use GENERIC_PCI_IOMAP
  sparc: io: remove duplicate relaxed accessors on sparc32
  ARM: sa11x0: Use void __iomem * in MMIO accessors
  arm64: Use include/asm-generic/io.h
  ARM: Use include/asm-generic/io.h
  asm-generic/io.h: Implement generic {read,write}s*()
  asm-generic/io.h: Reconcile I/O accessor overrides
  /dev/mem: Use more consistent data types
  Change xlate_dev_{kmem,mem}_ptr() prototypes
  ARM: ixp4xx: Properly override I/O accessors
  ARM: ixp4xx: Fix build with IXP4XX_INDIRECT_PCI
  ARM: ebsa110: Properly override I/O accessors
  ARC: Remove redundant PCI_IOBASE declaration
  documentation: memory-barriers: clarify relaxed io accessor semantics
  x86: io: implement dummy relaxed accessor macros for writes
  tile: io: implement dummy relaxed accessor macros for writes
  sparc: io: implement dummy relaxed accessor macros for writes
  powerpc: io: implement dummy relaxed accessor macros for writes
  parisc: io: implement dummy relaxed accessor macros for writes
  mn10300: io: implement dummy relaxed accessor macros for writes
  ...
2014-12-09 17:25:00 -08:00
Max Filippov ff009ab6d4 xtensa: fix kmap_prot definition
Replace PAGE_KERNEL with PAGE_KERNEL_EXEC to allow copy_to_user_page
invalidate icache for pages mapped with kmap.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-12-09 03:22:57 +03:00
Alexei Starovoitov 89aa075832 net: sock: allow eBPF programs to be attached to sockets
introduce new setsockopt() command:

setsockopt(sock, SOL_SOCKET, SO_ATTACH_BPF, &prog_fd, sizeof(prog_fd))

where prog_fd was received from syscall bpf(BPF_PROG_LOAD, attr, ...)
and attr->prog_type == BPF_PROG_TYPE_SOCKET_FILTER

setsockopt() calls bpf_prog_get() which increments refcnt of the program,
so it doesn't get unloaded while socket is using the program.

The same eBPF program can be attached to multiple sockets.

User task exit automatically closes socket which calls sk_filter_uncharge()
which decrements refcnt of eBPF program

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-12-05 21:47:32 -08:00
David S. Miller 076ce44825 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Conflicts:
	drivers/net/ethernet/chelsio/cxgb4vf/sge.c
	drivers/net/ethernet/intel/ixgbe/ixgbe_phy.c

sge.c was overlapping two changes, one to use the new
__dev_alloc_page() in net-next, and one to use s->fl_pg_order in net.

ixgbe_phy.c was a set of overlapping whitespace changes.

Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-14 01:01:12 -05:00
Eric Dumazet 2c8c56e15d net: introduce SO_INCOMING_CPU
Alternative to RPS/RFS is to use hardware support for multiple
queues.

Then split a set of million of sockets into worker threads, each
one using epoll() to manage events on its own socket pool.

Ideally, we want one thread per RX/TX queue/cpu, but we have no way to
know after accept() or connect() on which queue/cpu a socket is managed.

We normally use one cpu per RX queue (IRQ smp_affinity being properly
set), so remembering on socket structure which cpu delivered last packet
is enough to solve the problem.

After accept(), connect(), or even file descriptor passing around
processes, applications can use :

 int cpu;
 socklen_t len = sizeof(cpu);

 getsockopt(fd, SOL_SOCKET, SO_INCOMING_CPU, &cpu, &len);

And use this information to put the socket into the right silo
for optimal performance, as all networking stack should run
on the appropriate cpu, without need to send IPI (RPS/RFS).

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-11-11 13:00:06 -05:00
Chris Zankel c0d7aa0750 Xtensa improvements for 3.18:
- fix nommu support;
 - remove s6000 variant and s6105 platform.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJURikHAAoJEFH5zJH4P6BEyT4P/RiqRMw5S1X/DxXeEHy2Xhpg
 IJsqF5OMymnWuoXuGje4akm8qfqObuCmsJ7FGLtw7XOQzJ9DwAhpetEtty+bpsvt
 btlay50h62J/GjNz028xlru4FzRW3lc7s4ArUdZLHBeHjG8sSd5SoVPwsH0S9/aL
 LJdRyv0E35PLK4yTHa806KerSBKF1k7VhbEJKEJqIu1w4rJrH8R610IZbP/uTKV2
 DijmP5xqQwcDp+j8gxutkJZqsktEvuERgDywCheoYt8E0mr45C418prw/CChyLez
 EXk0jV0zw8OI1rUPc1PEuLT7jik+j59PVMSZM5pFFZRBZbv82HfSa0ZlL22Q6Saa
 TwpcKybH9bQmWL8sKV6ASmGyqz4vl9ZFIIlDXkFw/Gj13ZXxo12kEqN2dsOFZuIn
 TBdgVvUigpS7U3e4cClavPBaqlSgrnYFbD+9Ehcml83MuNlv37gL4H0X0y2u2/Tl
 0Ixb3QEk69IAuycgX37jTVfwGZ4HTkYPFMZckGNoJ7eBVCahTSQesNm52xD5quz1
 HMY+atTzzKnx3DGFCBbYayuqm3aBVkEmjYnPeag6sY8UkhtF3yr6YNWepf3jxxL7
 cR27gwP/k2YBf9M38Jyh5fnjYST6qj3ByXLNE2aeNnSO+qvZMNPCeDJHrBx+Zvtt
 5BjU5/3HZkAWWhqy6Aim
 =sSwk
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-for-next-20141021-2' of git://github.com/jcmvbkbc/linux-xtensa into for_next

Xtensa improvements for 3.18:

- fix nommu support;
- remove s6000 variant and s6105 platform.
2014-11-10 00:24:48 -08:00
Chris Zankel 66acb0216d Xtensa improvements for 3.18:
- add seccomp, getrandom, and memfd_create syscalls;
 - add defconfigs for KC705 and SMP LX200;
 - fix ISS and xtfpga Kconfig dependencies so that more randconfigs
   are buildable;
 - fix umount syscall;
 - implement pgprot_noncached.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJURijdAAoJEFH5zJH4P6BEOggP/i2VVO18pYPA0f5F6tjHPKz5
 YWTz03ebJE41FJCuhXsoolYGfZjBAv2Vnad5GymqOWXBfq/9w+Lev8UVPBLb+7uu
 Qy6bWcYcHPk2xgUrPXJGfiiX/hItYDdWclEXk9zIdV9/yEzunus9d/OskMk69Lav
 37RT6K78mfkv9F0RzrK2UNpb1CLjXFJ8TmVDGv2Pvi1xNJKih+WEX/S9VmFDmQBP
 iuRCbKPgT1PqELn0Q76NaQzOs7i9C3sy55CLmPPTQjTvSlPwO3OTzOQ4QrDOVZtG
 GvBhbnVkBco5yOLLF+1lHGPyk+2kDfr4c/uqvFnHHM2lKs1pLw/80C5zzo6azzUO
 MgIQHBGwR6VnCY2a6UpK9NFGuGaKW6yl4yaMqKTTFUt8N/cQadjgZ19xPgPZZlg1
 Mll5ZeBs05g6/Ph3nGuBLfa21hnNk2iZjU7/5d1acQTNjCm1HdU3AjcqHBaWIt5o
 Ee0EhNRHRrq/bJv+dgLUXiezAAdMLMvmGSOIu9jNV2LmbwgdrjfcMJbiPfEFDvsA
 4+++z56iu5rqLWxrU+pMDInN3rY2W/s2fLwkmqZcy64g0uiZuNhh+fulBCSnbm+C
 qEyDZXFfPEq+cv9mTH0ieP5YowSCHraYY68ALWt/OVwjahp7b7R5ifIr27eziYkk
 KRQtlJAWIAIvh5fUrYaN
 =F6y4
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-for-next-20141021-1' of git://github.com/jcmvbkbc/linux-xtensa into for_next

Xtensa improvements for 3.18:

- add seccomp, getrandom, and memfd_create syscalls;
- add defconfigs for KC705 and SMP LX200;
- fix ISS and xtfpga Kconfig dependencies so that more randconfigs
  are buildable;
- fix umount syscall;
- implement pgprot_noncached.
2014-10-23 10:30:33 -07:00
Max Filippov 5a0b1d78bf xtensa: nommu: clean up memory map dump
noMMU configuration doesn't use special area for vmalloc allocations,
don't print it in the memory map.
PAGE_OFFSET is fixed to 0 in noMMU, use min_low_pfn and max_low_pfn for
lowmem range display.
Make all XCHAL_KSEG_* constants unsigned long for consistency with other
addresses.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:58 +04:00
Max Filippov 2eabc1800d xtensa: nommu: set up cache and atomctl in initialize_mmu
initialize_mmu sets up atomctl SR which is needed for s32c1i to function
correctly even in noMMU configurations. It's also a good place to set up
caching attributes of physical memory.

Allow enabling INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX in noMMU
configurations for setting up atomctl and cache attributes.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:56 +04:00
Max Filippov 53490121e9 xtensa: move vecbase SR initialization to _startup
Instead of initializing vecbase in initialize_mmu macro, which may be
expanded either in Image.elf reset vector hadler or in the kernel
head.S, both times only when CONFIG_MMU is enabled, do this
initialization once in _startup function.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:55 +04:00
Max Filippov 72bb305fdc xtensa: nommu: fix load address definitions
Change KERNELOFFSET, LOAD_MEMORY_ADDRESS and VIRTUAL_MEMORY_ADDRESS to be
relative to the start of physical memory in noMMU configuration, as
there's no uniform memory remapping to KSEG starting at 0xd0000000.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:53 +04:00
Max Filippov b6cee17b7d xtensa: nommu: don't build most of the cache flushing code
Most cache flushing code is only relevant for MMU. Don't build it for
nommu configuration.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:50 +04:00
Max Filippov f6891ddbc7 xtensa: nommu: provide MAP_UNINITIALIZED definition
Add MAP_UNINITIALIZED to xtensa version of mman.h to keep mm/nommu.c
happy.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:47 +04:00
Max Filippov 972c55bf70 xtensa: nommu: provide _PAGE_CHG_MASK definition
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:46 +04:00
Max Filippov 4d5ea70246 xtensa: nommu: provide __invalidate_dcache_page_alias stub
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:45 +04:00
Max Filippov c9d09bbec4 xtensa: nommu: move init_mmu stub to nommu_context.h
mmu_context.h is not used in nommu configuration, nommu_context.h is
used instead.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:44 +04:00
Max Filippov 2651cc6974 xtensa: re-wire umount syscall to sys_oldumount
Userspace actually passes single parameter (path name) to the umount
syscall, so new umount just fails. Fix it by requesting old umount
syscall implementation and re-wiring umount to it.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-21 13:28:41 +04:00
Will Deacon affd2ae5de xtensa: io: remove dummy relaxed accessor macros for reads
These are now defined by asm-generic/io.h, so we don't need the private
definitions anymore.

Cc: Chris Zankel <chris@zankel.net>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2014-10-20 18:49:17 +01:00
Linus Torvalds dbb885fecc Merge branch 'locking-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull arch atomic cleanups from Ingo Molnar:
 "This is a series kept separate from the main locking tree, which
  cleans up and improves various details in the atomics type handling:

   - Remove the unused atomic_or_long() method

   - Consolidate and compress atomic ops implementations between
     architectures, to reduce linecount and to make it easier to add new
     ops.

   - Rewrite generic atomic support to only require cmpxchg() from an
     architecture - generate all other methods from that"

* 'locking-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (23 commits)
  locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read()
  locking, mips: Fix atomics
  locking, sparc64: Fix atomics
  locking,arch: Rewrite generic atomic support
  locking,arch,xtensa: Fold atomic_ops
  locking,arch,sparc: Fold atomic_ops
  locking,arch,sh: Fold atomic_ops
  locking,arch,powerpc: Fold atomic_ops
  locking,arch,parisc: Fold atomic_ops
  locking,arch,mn10300: Fold atomic_ops
  locking,arch,mips: Fold atomic_ops
  locking,arch,metag: Fold atomic_ops
  locking,arch,m68k: Fold atomic_ops
  locking,arch,m32r: Fold atomic_ops
  locking,arch,ia64: Fold atomic_ops
  locking,arch,hexagon: Fold atomic_ops
  locking,arch,cris: Fold atomic_ops
  locking,arch,avr32: Fold atomic_ops
  locking,arch,arm64: Fold atomic_ops
  locking,arch,arm: Fold atomic_ops
  ...
2014-10-13 15:48:00 +02:00
Linus Torvalds afa3536be8 Merge branch 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Ingo Molnar:
 "Main changes:

  - Fix the deadlock reported by Dave Jones et al
  - Clean up and fix nohz_full interaction with arch abilities
  - nohz init code consolidation/cleanup"

* 'timers-nohz-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  nohz: nohz full depends on irq work self IPI support
  nohz: Consolidate nohz full init code
  arm64: Tell irq work about self IPI support
  arm: Tell irq work about self IPI support
  x86: Tell irq work about self IPI support
  irq_work: Force raised irq work to run on irq work interrupt
  irq_work: Introduce arch_irq_work_has_interrupt()
  nohz: Move nohz full init call to tick init
2014-10-09 06:30:57 -04:00
Max Filippov bb550fd5c3 xtensa: add seccomp, getrandom, and memfd_create syscalls
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-06 03:23:52 +04:00
Max Filippov a211276a8e xtensa: implement pgprot_noncached
The default pgprot_noncached doesn't do anything. This leads to issues
when drivers rely on it to disable caching in userspace mappings.
Implement pgprot_noncached properly so that caching of userspace mappings
could be controlled.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-10-06 03:23:50 +04:00
Pranith Kumar 2291059c85 locking,arch: Use ACCESS_ONCE() instead of cast to volatile in atomic_read()
Use the much more reader friendly ACCESS_ONCE() instead of the cast to volatile.
This is purely a stylistic change.

Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
Acked-by: Jesper Nilsson <jesper.nilsson@axis.com>
Acked-by: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: linux-arch@vger.kernel.org
Link: http://lkml.kernel.org/r/1411482607-20948-1-git-send-email-bobby.prani@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-10-03 06:06:23 +02:00
Peter Zijlstra c5c38ef3d7 irq_work: Introduce arch_irq_work_has_interrupt()
The nohz full code needs irq work to trigger its own interrupt so that
the subsystem can work even when the tick is stopped.

Lets introduce arch_irq_work_has_interrupt() that archs can override to
tell about their support for this ability.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
2014-09-13 18:38:07 +02:00
Ricardo Ribalda Delgado a9a2eab5fb xtensa/uapi: Add definition of TIOC[SG]RS485
Commit: e676253b19 [3/21] serial/8250: Add
support for RS485 IOCTLs, adds support for RS485 ioctls for 825_core on
all the archs. Unfortunaltely the definition of TIOCSRS485 and
TIOCGRS485 was missing on the ioctls.h file

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-09-09 22:34:49 -07:00
Chris Zankel e792290be7 Xtensa improvements for 3.17:
- support highmem on cores with aliasing data cache. Enable highmem on kc705
   by default;
 - simplify addition of new core variants (no need to modify Kconfig /
   Makefiles);
 - improve robustness of unaligned access handler and its interaction with
   window overflow/underflow exception handlers;
 - deprecate atomic and spill registers syscalls;
 - clean up Kconfig: remove orphan MATH_EMULATION, sort 'select' statements;
 - wire up renameat2 syscall.
 
 Various fixes:
 - fix address checks in dma_{alloc,free}_coherent (runtime BUG);
 - fix access to THREAD_RA/THREAD_SP/THREAD_DS (debug build breakage);
 - fix TLBTEMP_BASE_2 region handling in fast_second_level_miss (runtime
   unrecoverable exception);
 - fix a6 and a7 handling in fast_syscall_xtensa (runtime userspace register
   clobbering);
 - fix kernel/user jump out of fast_unaligned (potential runtime unrecoverable
   exception);
 - replace termios IOCTL code definitions with constants (userspace build
   breakage).
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJT7YTeAAoJEFH5zJH4P6BEnOYQAJ716CslOAM96DyMWilpSHmn
 y9Ei5UDorzm7Qiqeg3h0t8BafjDKobAAV+9YP29wPXU5+CKCQTWG8u4n+2BjMyM5
 4OyG9SiAJnHpTnySiASmvMiG3slL34VXCyDhWMmF2dQ8CX4+GFm7RSHNy62l4fYR
 x9iySEtZPD7Uv7aKVfUfIPpY926S+kL3mhOUwlDwMEuDJQhS4oqxc+JL1xoG5XwQ
 qoCjAEDvoyPgSPKg9dmLpAlbhERe20KPD6biraJ3gW/gAvIMxmeC88rybzF01RbL
 bf5J93UHay5mQhheAz25Gg2k0DoQHgONsnqmlMOgNk0u/hFJGqnz54DONVzBplVR
 16VEHdDmUwO5+cuFDyfcZTtU0u0yV9l+Rr+NLUekyxhjVlL7o5648rZufLLBrnNK
 SQ+ueI3rp1thnHR+L5iB/E+abjGoUK6TsWJGNYvY6kOPArz9OEKHQkFOhEYip9t2
 vT7qfz/YKX0dc8ZwCeSwif/haeChHOvuJU2MKqKBz0McwXv7QxcadYR1o3mP87BL
 Lp9vibaVaBUT9SkZFtNJwEgJ7WeSV5EN1faakATFRR7H/qhMtUDDFRXAZLcGwUV/
 yF60YQuFW0jdwKaEtI1TI1zmckFxPxLwfTXWKob+T4E8KE+k5ZXq1Vcl9FoB5pWG
 Jcxn92MhHKKl7EAXeveo
 =q9be
 -----END PGP SIGNATURE-----

Merge tag 'xtensa-for-next-20140815' into for_next

Xtensa improvements for 3.17:
- support highmem on cores with aliasing data cache. Enable highmem on kc705
  by default;
- simplify addition of new core variants (no need to modify Kconfig /
  Makefiles);
- improve robustness of unaligned access handler and its interaction with
  window overflow/underflow exception handlers;
- deprecate atomic and spill registers syscalls;
- clean up Kconfig: remove orphan MATH_EMULATION, sort 'select' statements;
- wire up renameat2 syscall.

Various fixes:
- fix address checks in dma_{alloc,free}_coherent (runtime BUG);
- fix access to THREAD_RA/THREAD_SP/THREAD_DS (debug build breakage);
- fix TLBTEMP_BASE_2 region handling in fast_second_level_miss (runtime
  unrecoverable exception);
- fix a6 and a7 handling in fast_syscall_xtensa (runtime userspace register
  clobbering);
- fix kernel/user jump out of fast_unaligned (potential runtime unrecoverable
  exception);
- replace termios IOCTL code definitions with constants (userspace build
  breakage).

Signed-off-by: Chris Zankel <chris@zankel.net>
2014-08-18 17:30:24 -07:00
Peter Zijlstra d4608dd5b4 locking,arch,xtensa: Fold atomic_ops
Many of the atomic op implementations are the same except for one
instruction; fold the lot into a few CPP macros and reduce LoC.

This also prepares for easy addition of new ops.

Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Chris Zankel <chris@zankel.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: linux-xtensa@linux-xtensa.org
Link: http://lkml.kernel.org/r/20140508135852.879575796@infradead.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-08-14 12:48:14 +02:00
Max Filippov 8504b503df xtensa: support aliasing cache in kmap
Define ARCH_PKMAP_COLORING and provide corresponding macro definitions
on cores with aliasing data cache.

Instead of single last_pkmap_nr maintain an array last_pkmap_nr_arr of
pkmap counters for each page color. Make sure that kmap maps physical
page at virtual address with color matching its physical address.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:22 +04:00
Max Filippov 32544d9c10 xtensa: support aliasing cache in k[un]map_atomic
Map high memory pages at virtual addresses with color that match color
of their physical address. Existing cache alias management mechanisms
may be used with such pages.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:21 +04:00
Max Filippov a91902db29 xtensa: implement clear_user_highpage and copy_user_highpage
Existing clear_user_page and copy_user_page cannot be used with highmem
because they calculate physical page address from its virtual address
and do it incorrectly in case of high memory page mapped with
kmap_atomic. Also kmap is not needed, as most likely userspace mapping
color would be different from the kmapped color.

Provide clear_user_highpage and copy_user_highpage functions that
determine if temporary mapping is needed for the pages. Move most of the
logic of the former clear_user_page and copy_user_page to
xtensa/mm/cache.c only leaving temporary mapping setup, invalidation and
clearing/copying in the xtensa/mm/misc.S. Rename these functions to
clear_page_alias and copy_page_alias.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:20 +04:00
Max Filippov 7128039fe2 xtensa: fix TLBTEMP_BASE_2 region handling in fast_second_level_miss
Current definition of TLBTEMP_BASE_2 is always 32K above the
TLBTEMP_BASE_1, whereas fast_second_level_miss handler for the TLBTEMP
region analyzes virtual address bit (PAGE_SHIFT + DCACHE_ALIAS_ORDER)
to determine TLBTEMP region where the fault happened. The size of the
TLBTEMP region is also checked incorrectly: not 64K, but twice data
cache way size (whicht may as well be less than the instruction cache
way size).

Fix TLBTEMP_BASE_2 to be TLBTEMP_BASE_1 + data cache way size.
Provide TLBTEMP_SIZE that is a greater of doubled data cache way size or
the instruction cache way size, and use it to determine if the second
level TLB miss occured in the TLBTEMP region.

Practical occurence of page faults in the TLBTEMP area is extremely
rare, this code can be tested by deletion of all w[di]tlb instructions
in the tlbtemp_mapping region.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:19 +04:00
Max Filippov 22def76811 xtensa: make fixmap region addressing grow with index
It's much easier to reason about alignment and coloring of regions
located in the fixmap when fixmap index is just a PFN within the fixmap
region. Change fixmap addressing so that index 0 corresponds to
FIXADDR_START instead of the FIXADDR_TOP.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:17 +04:00
Max Filippov 5224712374 xtensa: fix access to THREAD_RA/THREAD_SP/THREAD_DS
With SMP and a lot of debug options enabled task_struct::thread gets out
of reach of s32i/l32i instructions with base pointing at task_struct,
breaking build with the following messages:

  arch/xtensa/kernel/entry.S: Assembler messages:
  arch/xtensa/kernel/entry.S:1002: Error: operand 3 of 'l32i.n' has invalid value '1048'
  arch/xtensa/kernel/entry.S:1831: Error: operand 3 of 's32i.n' has invalid value '1040'
  arch/xtensa/kernel/entry.S:1832: Error: operand 3 of 's32i.n' has invalid value '1044'

Change base to point to task_struct::thread in such cases.
Don't use a10 in _switch_to to save/restore prev pointer as a2 is not
clobbered.

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:16 +04:00
Miklos Szeredi 89f77c6f5b xtensa: add renameat2 syscall
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Cc: Chris Zankel <chris@zankel.net>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:15 +04:00
Max Filippov f61bf8e7d1 xtensa: replace IOCTL code definitions with constants
This fixes userspace code that builds on other architectures but fails
on xtensa due to references to structures that other architectures don't
refer to. E.g. this fixes the following issue with python-2.7.8:

  python-2.7.8/Modules/termios.c:861:25: error: invalid application
     of 'sizeof' to incomplete type 'struct serial_multiport_struct'
     {"TIOCSERGETMULTI", TIOCSERGETMULTI},
  python-2.7.8/Modules/termios.c:870:25: error: invalid application
     of 'sizeof' to incomplete type 'struct serial_multiport_struct'
     {"TIOCSERSETMULTI", TIOCSERSETMULTI},
  python-2.7.8/Modules/termios.c:900:24: error: invalid application
     of 'sizeof' to incomplete type 'struct tty_struct'
     {"TIOCTTYGSTRUCT", TIOCTTYGSTRUCT},

Cc: stable@vger.kernel.org
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2014-08-14 11:59:13 +04:00
Davidlohr Bueso 3a6bfbc91d arch, locking: Ciao arch_mutex_cpu_relax()
The arch_mutex_cpu_relax() function, introduced by 34b133f, is
hacky and ugly. It was added a few years ago to address the fact
that common cpu_relax() calls include yielding on s390, and thus
impact the optimistic spinning functionality of mutexes. Nowadays
we use this function well beyond mutexes: rwsem, qrwlock, mcs and
lockref. Since the macro that defines the call is in the mutex header,
any users must include mutex.h and the naming is misleading as well.

This patch (i) renames the call to cpu_relax_lowlatency  ("relax, but
only if you can do it with very low latency") and (ii) defines it in
each arch's asm/processor.h local header, just like for regular cpu_relax
functions. On all archs, except s390, cpu_relax_lowlatency is simply cpu_relax,
and thus we can take it out of mutex.h. While this can seem redundant,
I believe it is a good choice as it allows us to move out arch specific
logic from generic locking primitives and enables future(?) archs to
transparently define it, similarly to System Z.

Signed-off-by: Davidlohr Bueso <davidlohr@hp.com>
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Bharat Bhushan <r65777@freescale.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Chen Liqin <liqin.linux@gmail.com>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Chris Zankel <chris@zankel.net>
Cc: David Howells <dhowells@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Deepthi Dharwar <deepthi@linux.vnet.ibm.com>
Cc: Dominik Dingel <dingel@linux.vnet.ibm.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Haavard Skinnemoen <hskinnemoen@gmail.com>
Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Hirokazu Takata <takata@linux-m32r.org>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: James E.J. Bottomley <jejb@parisc-linux.org>
Cc: James Hogan <james.hogan@imgtec.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: Joe Perches <joe@perches.com>
Cc: Jonas Bonn <jonas@southpole.se>
Cc: Joseph Myers <joseph@codesourcery.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Lennox Wu <lennox.wu@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mark Salter <msalter@redhat.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Matt Turner <mattst88@gmail.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: Michael Neuling <mikey@neuling.org>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Nicolas Pitre <nico@linaro.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Cc: Paul Gortmaker <paul.gortmaker@windriver.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Qiaowei Ren <qiaowei.ren@intel.com>
Cc: Rafael Wysocki <rafael.j.wysocki@intel.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Richard Kuo <rkuo@codeaurora.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Steven Miao <realmz6@gmail.com>
Cc: Steven Rostedt <srostedt@redhat.com>
Cc: Stratos Karafotis <stratosk@semaphore.gr>
Cc: Tim Chen <tim.c.chen@linux.intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Vasily Kulikov <segoon@openwall.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: Vineet Gupta <Vineet.Gupta1@synopsys.com>
Cc: Waiman Long <Waiman.Long@hp.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Wolfram Sang <wsa@the-dreams.de>
Cc: adi-buildroot-devel@lists.sourceforge.net
Cc: linux390@de.ibm.com
Cc: linux-alpha@vger.kernel.org
Cc: linux-am33-list@redhat.com
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-c6x-dev@linux-c6x.org
Cc: linux-cris-kernel@axis.com
Cc: linux-hexagon@vger.kernel.org
Cc: linux-ia64@vger.kernel.org
Cc: linux@lists.openrisc.net
Cc: linux-m32r-ja@ml.linux-m32r.org
Cc: linux-m32r@ml.linux-m32r.org
Cc: linux-m68k@lists.linux-m68k.org
Cc: linux-metag@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-parisc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org
Cc: linux-s390@vger.kernel.org
Cc: linux-sh@vger.kernel.org
Cc: linux-xtensa@linux-xtensa.org
Cc: sparclinux@vger.kernel.org
Link: http://lkml.kernel.org/r/1404079773.2619.4.camel@buesod1.americas.hpqcorp.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2014-07-17 12:32:47 +02:00
Linus Torvalds cc07aabc53 - Optimised assembly string/memory routines (based on the AArch64 Cortex
Strings library contributed to glibc but re-licensed under GPLv2)
 - Optimised crypto algorithms making use of the ARMv8 crypto extensions
   (together with kernel API for using FPSIMD instructions in interrupt
   context)
 - Ftrace support
 - CPU topology parsing from DT
 - ESR_EL1 (Exception Syndrome Register) exposed to user space signal
   handlers for SIGSEGV/SIGBUS (useful to emulation tools like Qemu)
 - 1GB section linear mapping if applicable
 - Barriers usage clean-up
 - Default pgprot clean-up
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.9 (GNU/Linux)
 
 iQIcBAABAgAGBQJTkb+CAAoJEGvWsS0AyF7xLyEQAJgL8s2SdDyd+R8aukNDu3n9
 tCK7yVHO9Kg96dfeXVuSOVEo2jszo6R3nxzUL05FMovr230WBcmoeHvHz8ETGnw1
 g0yO8Ltkckjevog4UleCa3wGtYISjvwwrTalzbqoEWzsF2AV8oiqv/yuIn/EdkUr
 jaOqfNsnAQa8TIz4vMhi/AVdJWTTU/F6WP80oqCbxqXu/WL2InuBlHtOJMbk1HDI
 u1DJUGDQ1B9OgSVRkAOjCjSsEtz8sDY3lXsg3V1qT5+NbZTyomYM2IiBLdgQcX4P
 t/rqX9nX4VmRQtzefeP5WhKFks2x80C0BKibWC4teeL++tJHbgbFkyjoZZGcP27o
 zued3cYABrjrcAEU6ko/LUiL2Q4ozBOzosClpjpWulCxNPzsOps82UZWo3F3XbAt
 xjE3k7WF9WeNBOJdDGrarEaSLdnjjgCLoWVs8cOUYLpOOrtdSw16D29jJ68U0Y5g
 31wdwKxoueC8SFt8M9fP9J9Jyau08g+kvW1xQXrRmroppweFxjSpSy90imARyux/
 wUFz79HxkQB79ZHpJ0I5TNrw/w+7pBnfVSKGPOzrk+ZUsaH76caNRBoffUCzFMzz
 T3Sc8A36TZtOIcGR/Q4DMZNFXlIUXDSzCHP2Iu0QoIjTd5Ex96cqNvy3nswCYWwv
 yGe3ZEqUq9+WL7snNW4v
 =Jj8U
 -----END PGP SIGNATURE-----

Merge tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux into next

Pull arm64 updates from Catalin Marinas:
 - Optimised assembly string/memory routines (based on the AArch64
   Cortex Strings library contributed to glibc but re-licensed under
   GPLv2)
 - Optimised crypto algorithms making use of the ARMv8 crypto extensions
   (together with kernel API for using FPSIMD instructions in interrupt
   context)
 - Ftrace support
 - CPU topology parsing from DT
 - ESR_EL1 (Exception Syndrome Register) exposed to user space signal
   handlers for SIGSEGV/SIGBUS (useful to emulation tools like Qemu)
 - 1GB section linear mapping if applicable
 - Barriers usage clean-up
 - Default pgprot clean-up

Conflicts as per Catalin.

* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (57 commits)
  arm64: kernel: initialize broadcast hrtimer based clock event device
  arm64: ftrace: Add system call tracepoint
  arm64: ftrace: Add CALLER_ADDRx macros
  arm64: ftrace: Add dynamic ftrace support
  arm64: Add ftrace support
  ftrace: Add arm64 support to recordmcount
  arm64: Add 'notrace' attribute to unwind_frame() for ftrace
  arm64: add __ASSEMBLY__ in asm/insn.h
  arm64: Fix linker script entry point
  arm64: lib: Implement optimized string length routines
  arm64: lib: Implement optimized string compare routines
  arm64: lib: Implement optimized memcmp routine
  arm64: lib: Implement optimized memset routine
  arm64: lib: Implement optimized memmove routine
  arm64: lib: Implement optimized memcpy routine
  arm64: defconfig: enable a few more common/useful options in defconfig
  ftrace: Make CALLER_ADDRx macros more generic
  arm64: Fix deadlock scenario with smp_send_stop()
  arm64: Fix machine_shutdown() definition
  arm64: Support arch_irq_work_raise() via self IPIs
  ...
2014-06-06 10:43:28 -07:00
Linus Torvalds 776edb5931 Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into next
Pull core locking updates from Ingo Molnar:
 "The main changes in this cycle were:

   - reduced/streamlined smp_mb__*() interface that allows more usecases
     and makes the existing ones less buggy, especially in rarer
     architectures

   - add rwsem implementation comments

   - bump up lockdep limits"

* 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (33 commits)
  rwsem: Add comments to explain the meaning of the rwsem's count field
  lockdep: Increase static allocations
  arch: Mass conversion of smp_mb__*()
  arch,doc: Convert smp_mb__*()
  arch,xtensa: Convert smp_mb__*()
  arch,x86: Convert smp_mb__*()
  arch,tile: Convert smp_mb__*()
  arch,sparc: Convert smp_mb__*()
  arch,sh: Convert smp_mb__*()
  arch,score: Convert smp_mb__*()
  arch,s390: Convert smp_mb__*()
  arch,powerpc: Convert smp_mb__*()
  arch,parisc: Convert smp_mb__*()
  arch,openrisc: Convert smp_mb__*()
  arch,mn10300: Convert smp_mb__*()
  arch,mips: Convert smp_mb__*()
  arch,metag: Convert smp_mb__*()
  arch,m68k: Convert smp_mb__*()
  arch,m32r: Convert smp_mb__*()
  arch,ia64: Convert smp_mb__*()
  ...
2014-06-03 12:57:53 -07:00
Linus Torvalds 425553209b PCI changes for the v3.16 merge window:
Enumeration
     - Notify driver before and after device reset (Keith Busch)
     - Use reset notification in NVMe (Keith Busch)
 
   NUMA
     - Warn if we have to guess host bridge node information (Myron Stowe)
     - Work around AMD Fam15h BIOSes that fail to provide _PXM (Suravee Suthikulpanit)
     - Clean up and mark early_root_info_init() as deprecated (Suravee Suthikulpanit)
 
   Driver binding
     - Add "driver_override" for force specific binding (Alex Williamson)
     - Fail "new_id" addition for devices we already know about (Bandan Das)
 
   Resource management
     - Support BAR sizes up to 8GB (Nikhil Rao, Alan Cox)
     - Don't move IORESOURCE_PCI_FIXED resources (Bjorn Helgaas)
     - Mark SBx00 HPET BAR as IORESOURCE_PCI_FIXED (Bjorn Helgaas)
     - Fail safely if we can't handle BARs larger than 4GB (Bjorn Helgaas)
     - Reject BAR above 4GB if dma_addr_t is too small (Bjorn Helgaas)
     - Don't convert BAR address to resource if dma_addr_t is too small (Bjorn Helgaas)
     - Don't set BAR to zero if dma_addr_t is too small (Bjorn Helgaas)
     - Don't print anything while decoding is disabled (Bjorn Helgaas)
     - Don't add disabled subtractive decode bus resources (Bjorn Helgaas)
     - Add resource allocation comments (Bjorn Helgaas)
     - Restrict 64-bit prefetchable bridge windows to 64-bit resources (Yinghai Lu)
     - Assign i82875p_edac PCI resources before adding device (Yinghai Lu)
 
   PCI device hotplug
     - Remove unnecessary "dev->bus" test (Bjorn Helgaas)
     - Use PCI_EXP_SLTCAP_PSN define (Bjorn Helgaas)
     - Fix rphahp endianess issues (Laurent Dufour)
     - Acknowledge spurious "cmd completed" event (Rajat Jain)
     - Allow hotplug service drivers to operate in polling mode (Rajat Jain)
     - Fix cpqphp possible NULL dereference (Rickard Strandqvist)
 
   MSI
     - Replace pci_enable_msi_block() by pci_enable_msi_exact() (Alexander Gordeev)
     - Replace pci_enable_msix() by pci_enable_msix_exact() (Alexander Gordeev)
     - Simplify populate_msi_sysfs() (Jan Beulich)
 
   Virtualization
     - Add Intel Patsburg (X79) root port ACS quirk (Alex Williamson)
     - Mark RTL8110SC INTx masking as broken (Alex Williamson)
 
   Generic host bridge driver
     - Add generic PCI host controller driver (Will Deacon)
 
   Freescale i.MX6
     - Use new clock names (Lucas Stach)
     - Drop old IRQ mapping (Lucas Stach)
     - Remove optional (and unused) IRQs (Lucas Stach)
     - Add support for MSI (Lucas Stach)
     - Fix imx6_add_pcie_port() section mismatch warning (Sachin Kamat)
 
   Renesas R-Car
     - Add gen2 device tree support (Ben Dooks)
     - Use new OF interrupt mapping when possible (Lucas Stach)
     - Add PCIe driver (Phil Edworthy)
     - Add PCIe MSI support (Phil Edworthy)
     - Add PCIe device tree bindings (Phil Edworthy)
 
   Samsung Exynos
     - Remove unnecessary OOM messages (Jingoo Han)
     - Fix add_pcie_port() section mismatch warning (Sachin Kamat)
 
   Synopsys DesignWare
     - Make MSI ISR shared IRQ aware (Lucas Stach)
 
   Miscellaneous
     - Check for broken config space aliasing (Alex Williamson)
     - Update email address (Ben Hutchings)
     - Fix Broadcom CNB20LE unintended sign extension (Bjorn Helgaas)
     - Fix incorrect vgaarb conditional in WARN_ON() (Bjorn Helgaas)
     - Remove unnecessary __ref annotations (Bjorn Helgaas)
     - Add arch/x86/kernel/quirks.c to MAINTAINERS PCI file patterns (Bjorn Helgaas)
     - Fix use of uninitialized MPS value (Bjorn Helgaas)
     - Tidy x86/gart messages (Bjorn Helgaas)
     - Fix return value from pci_user_{read,write}_config_*() (Gavin Shan)
     - Turn pcibios_penalize_isa_irq() into a weak function (Hanjun Guo)
     - Remove unused serial device IDs (Jean Delvare)
     - Use designated initialization in PCI_VDEVICE (Mark Rustad)
     - Fix powerpc NULL dereference in pci_root_buses traversal (Mike Qiu)
     - Configure MPS on ARM (Murali Karicheri)
     - Remove unnecessary includes of <linux/init.h> (Paul Gortmaker)
     - Move Open Firmware devspec attribute to PCI common code (Sebastian Ott)
     - Use pdev->dev.groups for attribute creation on s390 (Sebastian Ott)
     - Remove pcibios_add_platform_entries() (Sebastian Ott)
     - Add new ID for Intel GPU "spurious interrupt" quirk (Thomas Jarosch)
     - Rename pci_is_bridge() to pci_has_subordinate() (Yijing Wang)
     - Add and use new pci_is_bridge() interface (Yijing Wang)
     - Make pci_bus_add_device() void (Yijing Wang)
 
   DMA API
     - Clarify physical/bus address distinction in docs (Bjorn Helgaas)
     - Fix typos in docs (Emilio López)
     - Update dma_pool_create ()and dma_pool_alloc() descriptions (Gioh Kim)
     - Change dma_declare_coherent_memory() CPU address to phys_addr_t (Bjorn Helgaas)
     - Pass GAPSPCI_DMA_BASE CPU & bus address to dma_declare_coherent_memory() (Bjorn Helgaas)
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1.4.11 (GNU/Linux)
 
 iQIcBAABAgAGBQJTjMaQAAoJEFmIoMA60/r8XncQAKX7cD6btXCZnrcYo7inseyp
 3rwOlrsNkWyHqSj/RqqzE1NY6L1h5G2uliI6xg1SKenuHPDcosm5d8FYO0ORKiUs
 xrqBkmZJHXN7fck//tJwsTXiYh5u42RO8QWbvZVr5UqXe40LyaMHMh9Y7VarrU/o
 sM2ADzFKagv1qMQ13nmYxqT+Zl+CqpimyLP+ep6Nfqxi6ils+KJ6b9SKYqrpqE6t
 Mcq2K5ShqU5SaYub1JIXLcQ9XylID+t1M9+cwixcs7a87HbJiktfkGqQvQJoUIuK
 Q5U+abcIGk4vfOnDCctSnoRyrcbTAZ/vqfo0vpX22TokESjwrD8hFOX5HPOFtD+4
 wIDbYurW/8oBhLRaJ0uTPzSH8bXjXTynAwxHZgIrEur5908eECKQ/WiFCxyrovvv
 r4ThAN0FaobllEr0XOFESOzDNSt/ME00WWI7+puAJ/KJkFEtcXt9othLmLmvLz8H
 2GWXrm/aOR0WUO7foGUxI3bXYlDN6NbSKpfuZsLAi2VAyJJ6L6yVSo/fT0X07e3z
 qRy9LOohuiwIKv/I4F2SEq2REfGGsnkrJBoeQi/oBZDcBy1Lsi7P9LWIERhLQEM+
 Hm+30lC/f326nI3hoyThj2k2xxZOQzCIvrt658xP4qd9Zfe1bvCH58FF8K62CoOd
 p8XAf7Sl6v6YUodUrT/t
 =km55
 -----END PGP SIGNATURE-----

Merge tag 'pci-v3.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci into next

Pull PCI changes from Bjorn Helgaas:
 "Enumeration
    - Notify driver before and after device reset (Keith Busch)
    - Use reset notification in NVMe (Keith Busch)

  NUMA
    - Warn if we have to guess host bridge node information (Myron Stowe)
    - Work around AMD Fam15h BIOSes that fail to provide _PXM (Suravee
      Suthikulpanit)
    - Clean up and mark early_root_info_init() as deprecated (Suravee
      Suthikulpanit)

  Driver binding
    - Add "driver_override" for force specific binding (Alex Williamson)
    - Fail "new_id" addition for devices we already know about (Bandan
      Das)

  Resource management
    - Support BAR sizes up to 8GB (Nikhil Rao, Alan Cox)
    - Don't move IORESOURCE_PCI_FIXED resources (Bjorn Helgaas)
    - Mark SBx00 HPET BAR as IORESOURCE_PCI_FIXED (Bjorn Helgaas)
    - Fail safely if we can't handle BARs larger than 4GB (Bjorn Helgaas)
    - Reject BAR above 4GB if dma_addr_t is too small (Bjorn Helgaas)
    - Don't convert BAR address to resource if dma_addr_t is too small
      (Bjorn Helgaas)
    - Don't set BAR to zero if dma_addr_t is too small (Bjorn Helgaas)
    - Don't print anything while decoding is disabled (Bjorn Helgaas)
    - Don't add disabled subtractive decode bus resources (Bjorn Helgaas)
    - Add resource allocation comments (Bjorn Helgaas)
    - Restrict 64-bit prefetchable bridge windows to 64-bit resources
      (Yinghai Lu)
    - Assign i82875p_edac PCI resources before adding device (Yinghai Lu)

  PCI device hotplug
    - Remove unnecessary "dev->bus" test (Bjorn Helgaas)
    - Use PCI_EXP_SLTCAP_PSN define (Bjorn Helgaas)
    - Fix rphahp endianess issues (Laurent Dufour)
    - Acknowledge spurious "cmd completed" event (Rajat Jain)
    - Allow hotplug service drivers to operate in polling mode (Rajat Jain)
    - Fix cpqphp possible NULL dereference (Rickard Strandqvist)

  MSI
    - Replace pci_enable_msi_block() by pci_enable_msi_exact()
      (Alexander Gordeev)
    - Replace pci_enable_msix() by pci_enable_msix_exact() (Alexander Gordeev)
    - Simplify populate_msi_sysfs() (Jan Beulich)

  Virtualization
    - Add Intel Patsburg (X79) root port ACS quirk (Alex Williamson)
    - Mark RTL8110SC INTx masking as broken (Alex Williamson)

  Generic host bridge driver
    - Add generic PCI host controller driver (Will Deacon)

  Freescale i.MX6
    - Use new clock names (Lucas Stach)
    - Drop old IRQ mapping (Lucas Stach)
    - Remove optional (and unused) IRQs (Lucas Stach)
    - Add support for MSI (Lucas Stach)
    - Fix imx6_add_pcie_port() section mismatch warning (Sachin Kamat)

  Renesas R-Car
    - Add gen2 device tree support (Ben Dooks)
    - Use new OF interrupt mapping when possible (Lucas Stach)
    - Add PCIe driver (Phil Edworthy)
    - Add PCIe MSI support (Phil Edworthy)
    - Add PCIe device tree bindings (Phil Edworthy)

  Samsung Exynos
    - Remove unnecessary OOM messages (Jingoo Han)
    - Fix add_pcie_port() section mismatch warning (Sachin Kamat)

  Synopsys DesignWare
    - Make MSI ISR shared IRQ aware (Lucas Stach)

  Miscellaneous
    - Check for broken config space aliasing (Alex Williamson)
    - Update email address (Ben Hutchings)
    - Fix Broadcom CNB20LE unintended sign extension (Bjorn Helgaas)
    - Fix incorrect vgaarb conditional in WARN_ON() (Bjorn Helgaas)
    - Remove unnecessary __ref annotations (Bjorn Helgaas)
    - Add arch/x86/kernel/quirks.c to MAINTAINERS PCI file patterns
      (Bjorn Helgaas)
    - Fix use of uninitialized MPS value (Bjorn Helgaas)
    - Tidy x86/gart messages (Bjorn Helgaas)
    - Fix return value from pci_user_{read,write}_config_*() (Gavin Shan)
    - Turn pcibios_penalize_isa_irq() into a weak function (Hanjun Guo)
    - Remove unused serial device IDs (Jean Delvare)
    - Use designated initialization in PCI_VDEVICE (Mark Rustad)
    - Fix powerpc NULL dereference in pci_root_buses traversal (Mike Qiu)
    - Configure MPS on ARM (Murali Karicheri)
    - Remove unnecessary includes of <linux/init.h> (Paul Gortmaker)
    - Move Open Firmware devspec attribute to PCI common code (Sebastian Ott)
    - Use pdev->dev.groups for attribute creation on s390 (Sebastian Ott)
    - Remove pcibios_add_platform_entries() (Sebastian Ott)
    - Add new ID for Intel GPU "spurious interrupt" quirk (Thomas Jarosch)
    - Rename pci_is_bridge() to pci_has_subordinate() (Yijing Wang)
    - Add and use new pci_is_bridge() interface (Yijing Wang)
    - Make pci_bus_add_device() void (Yijing Wang)

  DMA API
    - Clarify physical/bus address distinction in docs (Bjorn Helgaas)
    - Fix typos in docs (Emilio López)
    - Update dma_pool_create ()and dma_pool_alloc() descriptions (Gioh Kim)
    - Change dma_declare_coherent_memory() CPU address to phys_addr_t
      (Bjorn Helgaas)
    - Pass GAPSPCI_DMA_BASE CPU & bus address to dma_declare_coherent_memory()
      (Bjorn Helgaas)"

* tag 'pci-v3.16-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (92 commits)
  MAINTAINERS: Add generic PCI host controller driver
  PCI: generic: Add generic PCI host controller driver
  PCI: imx6: Add support for MSI
  PCI: designware: Make MSI ISR shared IRQ aware
  PCI: imx6: Remove optional (and unused) IRQs
  PCI: imx6: Drop old IRQ mapping
  PCI: imx6: Use new clock names
  i82875p_edac: Assign PCI resources before adding device
  ARM/PCI: Call pcie_bus_configure_settings() to set MPS
  PCI: imx6: Fix imx6_add_pcie_port() section mismatch warning
  PCI: Make pci_bus_add_device() void
  PCI: exynos: Fix add_pcie_port() section mismatch warning
  PCI: Introduce new device binding path using pci_dev.driver_override
  PCI: rcar: Add gen2 device tree support
  PCI: cpqphp: Fix possible null pointer dereference
  PCI: rcar: Add R-Car PCIe device tree bindings
  PCI: rcar: Add MSI support for PCIe
  PCI: rcar: Add Renesas R-Car PCIe driver
  PCI: Fix return value from pci_user_{read,write}_config_*()
  PCI: exynos: Remove unnecessary OOM messages
  ...
2014-06-02 12:15:19 -07:00
Hanjun Guo a43ae58c84 PCI: Turn pcibios_penalize_isa_irq() into a weak function
pcibios_penalize_isa_irq() is only implemented by x86 now, and legacy ISA
is not used by some architectures.  Make pcibios_penalize_isa_irq() a
__weak function to simplify the code.  This removes the need for new
platforms to add stub implementations of pcibios_penalize_isa_irq().

[bhelgaas: changelog, comments]
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2014-05-27 16:23:58 -06:00