linux-stable.git/arch/xtensa/include, branch v4.9.85

xtensa: fix futex_atomic_cmpxchg_inatomic

2018-02-17T12:21:19+00:00

commit ca47480921587ae30417dd234a9f79af188e3666 upstream.

Return 0 if the operation was successful, not the userspace memory
value. Check that userspace value equals passed oldval, not itself.
Don't update *uval if the value wasn't read from userspace memory.

This fixes process hang due to infinite loop in futex_lock_pi.
It also fixes a bunch of glibc tests nptl/tst-mutexpi*.

Signed-off-by: Max Filippov 
Signed-off-by: Greg Kroah-Hartman

xtensa: don't use linux IRQ #0

2017-06-17T04:41:58+00:00

commit e5c86679d5e864947a52fb31e45a425dea3e7fa9 upstream.

Linux IRQ #0 is reserved for error reporting and may not be used.
Increase NR_IRQS for one additional slot and increase
irq_domain_add_legacy parameter first_irq value to 1, so that linux
IRQ #0 is not associated with hardware IRQ #0 in legacy IRQ domains.
Introduce macro XTENSA_PIC_LINUX_IRQ for static translation of xtensa
PIC hardware IRQ # to linux IRQ #. Use this macro in XTFPGA platform
data definitions.

This fixes inability to use hardware IRQ #0 in configurations that don't
use device tree and allows for non-identity mapping between linux IRQ #
and hardware IRQ #.

Signed-off-by: Max Filippov 
Signed-off-by: Greg Kroah-Hartman

xtensa: make __pa work with uncached KSEG addresses

2017-04-12T10:41:14+00:00

commit 2b83878dd74a7c73bedcb6600663c1c46836e8af upstream.

When __pa is applied to virtual address in uncached KSEG region the
result is incorrect. Fix it by checking if the original address is in
the uncached KSEG and adjusting the result. It looks better than masking
off bits because pfn_valid would correctly work with new __pa results
and it may be made working in noMMU case, once we get definition for
uncached memory view.

This is required for the dma_common_mmap and DMA debug code to work
correctly: they both indirectly use __pa with coherent DMA addresses.
In case of DMA debug the visible effect is false reports that an address
mapped for DMA is accessed by CPU.

Tested-by: Boris Brezillon 
Reviewed-by: Boris Brezillon 
Signed-off-by: Max Filippov 
Signed-off-by: Greg Kroah-Hartman

xtensa: wire up new pkey_{mprotect,alloc,free} syscalls

2016-11-14T20:31:49+00:00

Signed-off-by: Max Filippov

Merge branch 'work.uaccess2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2016-10-12T06:38:39+00:00

Pull uaccess.h prepwork from Al Viro:
 "Preparations to tree-wide switch to use of linux/uaccess.h (which,
  obviously, will allow to start unifying stuff for real). The last step
  there, ie

    PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*'
    sed -i -e "s!$PATT!#include !" \
            `git grep -l "$PATT"|grep -v ^include/linux/uaccess.h`

  is not taken here - I would prefer to do it once just before or just
  after -rc1.  However, everything should be ready for it"

* 'work.uaccess2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  remove a stray reference to asm/uaccess.h in docs
  sparc64: separate extable_64.h, switch elf_64.h to it
  score: separate extable.h, switch module.h to it
  mips: separate extable.h, switch module.h to it
  x86: separate extable.h, switch sections.h to it
  remove stray include of asm/uaccess.h from cacheflush.h
  mn10300: remove a bogus processor.h->uaccess.h include
  xtensa: split uaccess.h into C and asm sides
  bonding: quit messing with IOCTL
  kill __kernel_ds_p off
  mn10300: finish verify_area() off
  frv: move HAVE_ARCH_UNMAPPED_AREA to pgtable.h
  exceptions: detritus removal

Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2016-10-10T18:01:51+00:00

Pull protection keys syscall interface from Thomas Gleixner:
 "This is the final step of Protection Keys support which adds the
  syscalls so user space can actually allocate keys and protect memory
  areas with them. Details and usage examples can be found in the
  documentation.

  The mm side of this has been acked by Mel"

* 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/pkeys: Update documentation
  x86/mm/pkeys: Do not skip PKRU register if debug registers are not used
  x86/pkeys: Fix pkeys build breakage for some non-x86 arches
  x86/pkeys: Add self-tests
  x86/pkeys: Allow configuration of init_pkru
  x86/pkeys: Default to a restrictive init PKRU
  pkeys: Add details of system call use to Documentation/
  generic syscalls: Wire up memory protection keys syscalls
  x86: Wire up protection keys system calls
  x86/pkeys: Allocation/free syscalls
  x86/pkeys: Make mprotect_key() mask off additional vm_flags
  mm: Implement new pkey_mprotect() system call
  x86/pkeys: Add fault handling for PF_PK page fault bit

Merge tag 'xtensa-20161005' of git://github.com/jcmvbkbc/linux-xtensa

2016-10-06T00:44:48+00:00

Pull Xtensa updates from Max Filippov:
 "Updates for the xtensa architecture.  It is a combined set of patches
  for 4.8 that never got to the mainline and new patches for 4.9.

   - add new kernel memory layouts for MMUv3 cores: with 256MB and 512MB
     KSEG size, starting at physical address other than 0

   - make kernel load address configurable

   - clean up kernel memory layout macros

   - drop sysmem early allocator and switch to memblock

   - enable kmemleak and memory reservation from the device tree

   - wire up new syscalls: userfaultfd, membarrier, mlock2,
     copy_file_range, preadv2 and pwritev2

   - add new platform: Cadence Configurable System Platform (CSP) and
     new core variant for it: xt_lnx

   - rearrange CCOUNT calibration code, make most of it generic

   - improve machine reset code (XTFPGA now reboots reliably with MMUv3
     cores)

   - provide default memmap command line option for configurations
     without device tree support

   - ISS fixes: simdisk is now capable of using highmem pages, panic
     correctly terminates simulator"

* tag 'xtensa-20161005' of git://github.com/jcmvbkbc/linux-xtensa: (24 commits)
  xtensa: disable MMU initialization option on MMUv2 cores
  xtensa: add default memmap and mmio32native options to defconfigs
  xtensa: add default memmap option to common_defconfig
  xtensa: add default memmap option to iss_defconfig
  xtensa: ISS: allow simdisk to use high memory buffers
  xtensa: ISS: define simc_exit and use it instead of inline asm
  xtensa: xtfpga: group platform_* functions together
  xtensa: rearrange CCOUNT calibration
  xtensa: xtfpga: use clock provider, don't update DT
  xtensa: Tweak xuartps UART driver Rx watermark for Cadence CSP config.
  xtensa: initialize MMU before jumping to reset vector
  xtensa: fix icountlevel setting in cpu_reset
  xtensa: extract common CPU reset code into separate function
  xtensa: Added Cadence CSP kernel configuration for Xtensa
  xtensa: fix default kernel load address
  xtensa: wire up new syscalls
  xtensa: support reserved-memory DT node
  xtensa: drop sysmem and switch to memblock
  xtensa: minimize use of PLATFORM_DEFAULT_MEM_{ADDR,SIZE}
  xtensa: cleanup MMU setup and kernel layout macros
  ...

xtensa: split uaccess.h into C and asm sides

2016-09-28T01:15:21+00:00

Signed-off-by: Al Viro

exceptions: detritus removal

2016-09-28T01:15:14+00:00

externs and defines for stuff that is never used

Signed-off-by: Al Viro

xtensa: extract common CPU reset code into separate function

2016-09-12T06:53:22+00:00

platform_restart implementatations do the same thing to reset CPU.
Don't duplicate that code, move it to a function and call it from
platform_restart.

Signed-off-by: Max Filippov