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  1. 26 Feb, 2010 1 commit
  3. 04 Jan, 2010 1 commit
  5. 07 Dec, 2009 1 commit
    • Martin Schwidefsky's avatar
      [S390] Improve address space mode selection. · b11b5334
      Martin Schwidefsky authored 
      
Introduce user_mode to replace the two variables switch_amode and
s390_noexec. There are three valid combinations of the old values:
  1) switch_amode == 0 && s390_noexec == 0
  2) switch_amode == 1 && s390_noexec == 0
  3) switch_amode == 1 && s390_noexec == 1
They get replaced by
  1) user_mode == HOME_SPACE_MODE
  2) user_mode == PRIMARY_SPACE_MODE
  3) user_mode == SECONDARY_SPACE_MODE
The new kernel parameter user_mode=[primary,secondary,home] lets
you choose the address space mode the user space processes should
use. In addition the CONFIG_S390_SWITCH_AMODE config option
is removed.
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      b11b5334
  7. 22 Sep, 2009 1 commit
  9. 25 Aug, 2009 1 commit
    • Josh Stone's avatar
      tracing: Rename FTRACE_SYSCALLS for tracepoints · 66700001
      Josh Stone authored 
      
s/HAVE_FTRACE_SYSCALLS/HAVE_SYSCALL_TRACEPOINTS/g
s/TIF_SYSCALL_FTRACE/TIF_SYSCALL_TRACEPOINT/g

The syscall enter/exit tracing is no longer specific to just ftrace, so
they now have names that reflect their tie to tracepoints instead.
Signed-off-by: default avatarJosh Stone <jistone@redhat.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Jiaying Zhang <jiayingz@google.com>
Cc: Martin Bligh <mbligh@google.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
LKML-Reference: <1251150194-1713-2-git-send-email-jistone@redhat.com>
Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      66700001
  11. 22 Jun, 2009 1 commit
  13. 23 Apr, 2009 1 commit
  15. 11 Feb, 2009 1 commit
  17. 27 Nov, 2008 1 commit
  19. 21 Aug, 2008 1 commit
  21. 30 May, 2008 1 commit
  23. 30 Apr, 2008 1 commit
  25. 17 Apr, 2008 1 commit
  27. 17 Mar, 2008 1 commit
    • Frank Blaschka's avatar
      qeth: new qeth device driver · 4a71df50
      Frank Blaschka authored 
      
List of major changes and improvements:
 no manipulation of the global ARP constructor
 clean code split into core, layer 2 and layer 3 functionality
 better exploitation of the ethtool interface
 better representation of the various hardware capabilities
 fix packet socket support (tcpdump), no fake_ll required
 osasnmpd notification via udev events
 coding style and beautification
Signed-off-by: default avatarFrank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: default avatarJeff Garzik <jeff@garzik.org>
      4a71df50
  29. 05 Mar, 2008 1 commit
  31. 09 Feb, 2008 1 commit
  33. 22 Oct, 2007 1 commit
  35. 17 Jul, 2007 2 commits
  37. 10 May, 2007 1 commit
  39. 27 Apr, 2007 2 commits
  41. 21 Feb, 2007 1 commit
  43. 08 Feb, 2007 3 commits
  45. 05 Feb, 2007 4 commits
    • Heiko Carstens's avatar
      [S390] Convert memory detection into C code. · ab14de6c
      Heiko Carstens authored 
      
Hopefully this will make it more maintainable and less error prone.
Code makes use of search_exception_tables(). Since it calls this
function before the kernel exeception table is sorted, there is an
early call to sort_main_extable().

This way it's easy to use the already present infrastructure of fixup
sections. Also this would allows to easily convert the rest of
head[31|64].S into C code.
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      ab14de6c
    • Jan Glauber's avatar
      [S390] Support for s390 Pseudo Random Number Generator · 1b278294
      Jan Glauber authored 
      
Starting with the z9 the CPU Cryptographic Assist Facility comes with
an integrated Pseudo Random Number Generator. The generator creates
random numbers by an algorithm similar to the ANSI X9.17 standard.
The pseudo-random numbers can be accessed via a character device driver
node called /dev/prandom. Similar to /dev/urandom any amount of bytes
can be read from the device without blocking.
Signed-off-by: default avatarJan Glauber <jan.glauber@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      1b278294
    • Gerald Schaefer's avatar
      [S390] noexec protection · c1821c2e
      Gerald Schaefer authored 
      
This provides a noexec protection on s390 hardware. Our hardware does
not have any bits left in the pte for a hw noexec bit, so this is a
different approach using shadow page tables and a special addressing
mode that allows separate address spaces for code and data.

As a special feature of our "secondary-space" addressing mode, separate
page tables can be specified for the translation of data addresses
(storage operands) and instruction addresses. The shadow page table is
used for the instruction addresses and the standard page table for the
data addresses.
The shadow page table is linked to the standard page table by a pointer
in page->lru.next of the struct page corresponding to the page that
contains the standard page table (since page->private is not really
private with the pte_lock and the page table pages are not in the LRU
list).
Depending on the software bits of a pte, it is either inserted into
both page tables or just into the standard (data) page table. Pages of
a vma that does not have the VM_EXEC bit set get mapped only in the
data address space. Any try to execute code on such a page will cause a
page translation exception. The standard reaction to this is a SIGSEGV
with two exceptions: the two system call opcodes 0x0a77 (sys_sigreturn)
and 0x0aad (sys_rt_sigreturn) are allowed. They are stored by the
kernel to the signal stack frame. Unfortunately, the signal return
mechanism cannot be modified to use an SA_RESTORER because the
exception unwinding code depends on the system call opcode stored
behind the signal stack frame.

This feature requires that user space is executed in secondary-space
mode and the kernel in home-space mode, which means that the addressing
modes need to be switched and that the noexec protection only works
for user space.
After switching the addressing modes, we cannot use the mvcp/mvcs
instructions anymore to copy between kernel and user space. A new
mvcos instruction has been added to the z9 EC/BC hardware which allows
to copy between arbitrary address spaces, but on older hardware the
page tables need to be walked manually.
Signed-off-by: default avatarGerald Schaefer <geraldsc@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      c1821c2e
    • Jan Glauber's avatar
      [S390] move crypto options and some cleanup. · 86aa9fc2
      Jan Glauber authored 
      
This patch moves the config options for the s390 crypto instructions
to the standard "Hardware crypto devices" menu. In addition some
cleanup has been done: use a flag for supported keylengths, add a
warning about machien limitation, return ENOTSUPP in case the
hardware has no support, remove superfluous printks and update
email addresses.
Signed-off-by: default avatarJan Glauber <jan.glauber@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      86aa9fc2
  47. 15 Dec, 2006 1 commit
  49. 08 Dec, 2006 1 commit
  51. 06 Nov, 2006 1 commit
    • Heiko Carstens's avatar
      [S390] revert add_active_range() usage patch. · bcc8bcb1
      Heiko Carstens authored 
      Commit 7676bef9

 breaks DCSS support on
s390. DCSS needs initialized struct pages to work. With the usage of
add_active_range() only the struct pages for physically present pages
are initialized.
This could be fixed if the DCSS driver would initiliaze the struct pages
itself, but this doesn't work too. This is because the mem_map array
does not include holes after the last present memory area and therefore
there is nothing that could be initialized.
To fix this and to avoid some dirty hacks revert this patch for now.
Will be added later when we move to a virtual mem_map.

Cc: Carsten Otte <cotte@de.ibm.com>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      bcc8bcb1
  53. 18 Oct, 2006 1 commit
  55. 06 Oct, 2006 1 commit
  57. 04 Oct, 2006 2 commits
  59. 20 Sep, 2006 1 commit
  61. 27 Jul, 2006 1 commit
  63. 11 Apr, 2006 1 commit
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