linux-stable.git/arch/parisc/include, branch v4.9

parisc: Purge TLB before setting PTE

2016-12-07T07:56:40+00:00

The attached change interchanges the order of purging the TLB and
setting the corresponding page table entry.  TLB purges are strongly
ordered.  It occurred to me one night that setting the PTE first might
have subtle ordering issues on SMP machines and cause random memory
corruption.

A TLB lock guards the insertion of user TLB entries.  So after the TLB
is purged, a new entry can't be inserted until the lock is released.
This ensures that the new PTE value is used when the lock is released.

Since making this change, no random segmentation faults have been
observed on the Debian hppa buildd servers.

Signed-off-by: John David Anglin  
Cc:  # v3.16+
Signed-off-by: Helge Deller

parisc: Ignore the pkey system calls for now

2016-11-02T22:07:14+00:00

Signed-off-by: Helge Deller

Merge branch 'parisc-4.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux

2016-10-12T06:59:07+00:00

Pull parisc fixes from Helge Deller:
 "Some final updates and fixes for this merge window for the parisc
  architecture. Changes include:

   - Fix boot problems with new memblock allocator on rp3410 machine

   - Increase initial kernel mapping size for 32- and 64-bit kernels,
     this allows to boot bigger kernels which have many modules built-in

   - Fix kernel layout regarding __gp and move exception table into RO
     section

   - Show trap names in crashes, use extable.h header instead of
     module.h"

* 'parisc-4.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: Show trap name in kernel crash
  parisc: Zero-initialize newly alloced memblock
  parisc: Move exception table into read-only section
  parisc: Fix kernel memory layout regarding position of __gp
  parisc: Increase initial kernel mapping size
  parisc: Migrate exception table users off module.h and onto extable.h

parisc: Show trap name in kernel crash

2016-10-11T18:52:47+00:00

Show the real trap name when the kernel crashes.

Signed-off-by: Helge Deller

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

parisc: Increase initial kernel mapping size

2016-10-09T07:57:54+00:00

Increase the initial kernel default page mapping size for 64-bit kernels to
64 MB and for 32-bit kernels to 32 MB.

Due to the additional support of ftrace, tracepoint and huge pages the kernel
size can exceed the sizes we used up to now.

Cc: stable@vger.kernel.org # 4.4+
Signed-off-by: Helge Deller

parisc: Increase KERNEL_INITIAL_SIZE for 32-bit SMP kernels

2016-10-07T16:23:43+00:00

Increase the initial kernel default page mapping size for SMP kernels to 32MB
and add a runtime check which panics early if the kernel is bigger than the
initial mapping size.

This fixes boot crashes of 32bit SMP kernels. Due to the introduction of huge
page support in kernel 4.4 and it's required initial kernel layout in memory, a
32bit SMP kernel usually got bigger (in layout, not size) than 16MB.

Cc: stable@vger.kernel.org #4.4+
Signed-off-by: Helge Deller

parisc: Add hardened usercopy feature

2016-10-06T20:10:19+00:00

Add hardened usercopy checks to parisc architecture and clean up
indenting.

Signed-off-by: Helge Deller

parisc: Add cfi_startproc and cfi_endproc to assembly code

2016-10-05T20:54:40+00:00

Add ENTRY_CFI() and ENDPROC_CFI() macros for dwarf debug info and
convert assembly users to new macros.

Signed-off-by: Helge Deller

Merge branch 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2016-09-14T16:35:05+00:00

Pull uaccess fixes from Al Viro:
 "Fixes for broken uaccess primitives - mostly lack of proper zeroing
  in copy_from_user()/get_user()/__get_user(), but for several
  architectures there's more (broken clear_user() on frv and
  strncpy_from_user() on hexagon)"

* 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (28 commits)
  avr32: fix copy_from_user()
  microblaze: fix __get_user()
  microblaze: fix copy_from_user()
  m32r: fix __get_user()
  blackfin: fix copy_from_user()
  sparc32: fix copy_from_user()
  sh: fix copy_from_user()
  sh64: failing __get_user() should zero
  score: fix copy_from_user() and friends
  score: fix __get_user/get_user
  s390: get_user() should zero on failure
  ppc32: fix copy_from_user()
  parisc: fix copy_from_user()
  openrisc: fix copy_from_user()
  nios2: fix __get_user()
  nios2: copy_from_user() should zero the tail of destination
  mn10300: copy_from_user() should zero on access_ok() failure...
  mn10300: failing __get_user() and get_user() should zero
  mips: copy_from_user() must zero the destination on access_ok() failure
  ARC: uaccess: get_user to zero out dest in cause of fault
  ...