linux-toradex.git/arch/tile/Kconfig, branch v3.4.77

tilegx: enable SYSCALL_WRAPPERS support

2012-05-18T17:33:24+00:00

Some discussion with the glibc mailing lists revealed that this was
necessary for 64-bit platforms with MIPS-like sign-extension rules
for 32-bit values.  The original symptom was that passing (uid_t)-1 to
setreuid() was failing in programs linked -pthread because of the "setxid"
mechanism for passing setxid-type function arguments to the syscall code.
SYSCALL_WRAPPERS handles ensuring that all syscall arguments end up with
proper sign-extension and is thus the appropriate fix for this problem.

On other platforms (s390, powerpc, sparc64, and mips) this was fixed
in 2.6.28.6.  The general issue is tracked as CVE-2009-0029.

Cc: 
Signed-off-by: Chris Metcalf

arch/tile/Kconfig: don't specify CONFIG_PAGE_OFFSET for 64-bit builds

2012-04-02T16:00:14+00:00

It's fixed at half the VA space and there's no point in configuring it.

Signed-off-by: Chris Metcalf

arch/tile/Kconfig: rename tile_defconfig to tilepro_defconfig

2012-04-02T16:00:13+00:00

We switched to using "tilepro" for the 32-bit stuff a while ago,
but missed this one usage.

Signed-off-by: Chris Metcalf

arch/tile/Kconfig: remove pointless "!M386" test.

2012-04-02T16:00:13+00:00

Looks like a cut and paste bug from the x86 version.

Signed-off-by: Chris Metcalf

tile: switch to GENERIC_PCI_IOMAP

2011-12-04T14:00:10+00:00

tile now has working stubs for ioport_map and ioremap
such that the generic pci_iomap will DTRT: cast to
pointer on memory and return NULL and log message on IO map.

Switch it over to GENERIC_PCI_IOMAP.

Signed-off-by: Michael S. Tsirkin

time: Cleanup old CONFIG_GENERIC_TIME references that snuck in

2011-10-04T20:07:47+00:00

Awhile back I removed all the CONFIG_GENERIC_TIME referecnes as
the last of the non-GENERIC_TIME arches were converted.

However, due to the functionality being important and around for
awhile, there apparently were some out of tree hardware enablement
patches that used it and have since been merged.

This patch removes the remaining instances of GENERIC_TIME.

Singed-off-by: John Stultz

Add Kconfig option ARCH_HAVE_NMI_SAFE_CMPXCHG

2011-08-03T15:12:37+00:00

cmpxchg() is widely used by lockless code, including NMI-safe lockless
code.  But on some architectures, the cmpxchg() implementation is not
NMI-safe, on these architectures the lockless code may need a
spin_trylock_irqsave() based implementation.

This patch adds a Kconfig option: ARCH_HAVE_NMI_SAFE_CMPXCHG, so that
NMI-safe lockless code can depend on it or provide different
implementation according to it.

On many architectures, cmpxchg is only NMI-safe for several specific
operand sizes. So, ARCH_HAVE_NMI_SAFE_CMPXCHG define in this patch
only guarantees cmpxchg is NMI-safe for sizeof(unsigned long).

Signed-off-by: Huang Ying 
Acked-by: Mike Frysinger 
Acked-by: Paul Mundt 
Acked-by: Hans-Christian Egtvedt 
Acked-by: Benjamin Herrenschmidt 
Acked-by: Chris Metcalf 
Acked-by: Richard Henderson 
CC: Mikael Starvik 
Acked-by: David Howells 
CC: Yoshinori Sato 
CC: Tony Luck 
CC: Hirokazu Takata 
CC: Geert Uytterhoeven 
CC: Michal Simek 
Acked-by: Ralf Baechle 
CC: Kyle McMartin 
CC: Martin Schwidefsky 
CC: Chen Liqin 
CC: "David S. Miller" 
CC: Ingo Molnar 
CC: Chris Zankel 
Signed-off-by: Len Brown

Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

2011-05-29T18:29:28+00:00

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  arch/tile: more /proc and /sys file support

arch/tile: more /proc and /sys file support

2011-05-27T14:39:05+00:00

This change introduces a few of the less controversial /proc and
/proc/sys interfaces for tile, along with sysfs attributes for
various things that were originally proposed as /proc/tile files.
It also adjusts the "hardwall" proc API.

Arnd Bergmann reviewed the initial arch/tile submission, which
included a complete set of all the /proc/tile and /proc/sys/tile
knobs that we had added in a somewhat ad hoc way during initial
development, and provided feedback on where most of them should go.

One knob turned out to be similar enough to the existing
/proc/sys/debug/exception-trace that it was re-implemented to use
that model instead.

Another knob was /proc/tile/grid, which reported the "grid" dimensions
of a tile chip (e.g. 8x8 processors = 64-core chip).  Arnd suggested
looking at sysfs for that, so this change moves that information
to a pair of sysfs attributes (chip_width and chip_height) in the
/sys/devices/system/cpu directory.  We also put the "chip_serial"
and "chip_revision" information from our old /proc/tile/board file
as attributes in /sys/devices/system/cpu.

Other information collected via hypervisor APIs is now placed in
/sys/hypervisor.  We create a /sys/hypervisor/type file (holding the
constant string "tilera") to be parallel with the Xen use of
/sys/hypervisor/type holding "xen".  We create three top-level files,
"version" (the hypervisor's own version), "config_version" (the
version of the configuration file), and "hvconfig" (the contents of
the configuration file).  The remaining information from our old
/proc/tile/board and /proc/tile/switch files becomes an attribute
group appearing under /sys/hypervisor/board/.

Finally, after some feedback from Arnd Bergmann for the previous
version of this patch, the /proc/tile/hardwall file is split up into
two conceptual parts.  First, a directory /proc/tile/hardwall/ which
contains one file per active hardwall, each file named after the
hardwall's ID and holding a cpulist that says which cpus are enclosed by
the hardwall.  Second, a /proc/PID file "hardwall" that is either
empty (for non-hardwall-using processes) or contains the hardwall ID.

Finally, this change pushes the /proc/sys/tile/unaligned_fixup/
directory, with knobs controlling the kernel code for handling the
fixup of unaligned exceptions.

Reviewed-by: Arnd Bergmann 
Signed-off-by: Chris Metcalf

arch: remove CONFIG_GENERIC_FIND_{NEXT_BIT,BIT_LE,LAST_BIT}

2011-05-27T00:12:38+00:00

By the previous style change, CONFIG_GENERIC_FIND_NEXT_BIT,
CONFIG_GENERIC_FIND_BIT_LE, and CONFIG_GENERIC_FIND_LAST_BIT are not used
to test for existence of find bitops anymore.

Signed-off-by: Akinobu Mita 
Acked-by: Greg Ungerer 
Cc: Arnd Bergmann 
Cc: Russell King 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds