linux.git/arch/mips/kernel, branch v3.8-rc2

Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus

2012-12-14T22:27:45+00:00

Pull MIPS updates from Ralf Baechle:
 "The MIPS bits for 3.8.  This also includes a bunch fixes that were
  sitting in the linux-mips.org git tree for a long time.  This pull
  request contains updates to several OCTEON drivers and the board
  support code for BCM47XX, BCM63XX, XLP, XLR, XLS, lantiq, Loongson1B,
  updates to the SSB bus support, MIPS kexec code and adds support for
  kdump.

  When pulling this, there are two expected merge conflicts in
  include/linux/bcma/bcma_driver_chipcommon.h which are trivial to
  resolve, just remove the conflict markers and keep both alternatives."

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (90 commits)
  MIPS: PMC-Sierra Yosemite: Remove support.
  VIDEO: Newport Fix console crashes
  MIPS: wrppmc: Fix build of PCI code.
  MIPS: IP22/IP28: Fix build of EISA code.
  MIPS: RB532: Fix build of prom code.
  MIPS: PowerTV: Fix build.
  MIPS: IP27: Correct fucked grammar in ops-bridge.c
  MIPS: Highmem: Fix build error if CONFIG_DEBUG_HIGHMEM is disabled
  MIPS: Fix potencial corruption
  MIPS: Fix for warning from FPU emulation code
  MIPS: Handle COP3 Unusable exception as COP1X for FP emulation
  MIPS: Fix poweroff failure when HOTPLUG_CPU configured.
  MIPS: MT: Fix build with CONFIG_UIDGID_STRICT_TYPE_CHECKS=y
  MIPS: Remove unused smvp.h
  MIPS/EDAC: Improve OCTEON EDAC support.
  MIPS: OCTEON: Add definitions for OCTEON memory contoller registers.
  MIPS: OCTEON: Add OCTEON family definitions to octeon-model.h
  ata: pata_octeon_cf: Use correct byte order for DMA in when built little-endian.
  MIPS/OCTEON/ata: Convert pata_octeon_cf.c to use device tree.
  MIPS: Remove usage of CEVT_R4K_LIB config option.
  ...

Merge branch 'mips-next' of http://dev.phrozen.org/githttp/mips-next into mips-for-linux-next

2012-12-13T18:40:13+00:00

MIPS: PMC-Sierra Yosemite: Remove support.

2012-12-13T17:15:30+00:00

Nobody seems to be interested anymore and upstream also never had an
ethernet driver.

Signed-off-by: Ralf Baechle

MIPS: Handle COP3 Unusable exception as COP1X for FP emulation

2012-12-13T17:15:27+00:00

 Our FP emulator is hardcoded for the MIPS IV FP instruction set and does
not match the FP ISA with the general ISA.  However for the few MIPS IV FP
instructions that use the COP1X major opcode it relies on the Coprocessor
Unusable exception to be delivered as a COP1 rather than COP3 exception.
This includes indexed transfer (LDXC1, etc.) and FP multiply-accumulate
(MADD.D, etc.) instructions.

 All the MIPS I, II, III and IV processors and some newer chips that do not
implement the FPU use the COP3 exception however.  Therefore I believe the
kernel should follow and redirect any COP3 Unusable traps to the emulator
unless an actual FPU part or core is present.

 This is a change that implements it.  Any minor opcode encodings that are
not recognised as valid FP instructions are rejected by the emulator and
will result in a SIGILL signal being delivered as they currently do.  We
do not support vendor-specific coprocessor 3 implementations supported
with MIPS I and MIPS II ISA processors; we never set CP0.Status.CU3.

[Ralf: On MIPS IV processors the kernel always enables the XX bit which
replaces the CU3 bit off earlier architecture revisions.]

 If matching between the CPU and the FPU ISA is considered required one
day, this can still be done in the emulator itself.  I think the CpU
exception dispatcher is not the right place to do this anyway, as there
are further differences between MIPS I, MIPS II, MIPS III, MIPS IV and
MIPS32 FP ISAs.

 Corresponding explanation of this implementation is included within the
change itself.

Signed-off-by: Maciej W. Rozycki 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/project/linux-mips/list/
Signed-off-by: Ralf Baechle

MIPS: Fix poweroff failure when HOTPLUG_CPU configured.

2012-12-13T17:15:26+00:00

When poweroff machine, kernel_power_off() call disable_nonboot_cpus().
And if we have HOTPLUG_CPU configured, disable_nonboot_cpus() is not an
empty function but attempt to actually disable the nonboot cpus. Since
system state is SYSTEM_POWER_OFF, play_dead() won't be called and thus
disable_nonboot_cpus() hangs. Therefore, we make this patch to avoid
poweroff failure.

Signed-off-by: Huacai Chen 
Signed-off-by: Hongliang Tao 
Signed-off-by: Hua Yan 
Cc: Yong Zhang 
Cc: stable@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Cc: Fuxin Zhang 
Cc: Zhangjin Wu 
Patchwork: https://patchwork.linux-mips.org/patch/4211/
Signed-off-by: Ralf Baechle

MIPS: MT: Fix build with CONFIG_UIDGID_STRICT_TYPE_CHECKS=y

2012-12-13T17:15:26+00:00

When CONFIG_UIDGID_STRICT_TYPE_CHECKS is enabled, plain integer checking
between different uids/gids is explicitely turned into a build failure
by making the k{uid,gid}_t types a structure containing a value:

arch/mips/kernel/mips-mt-fpaff.c: In function 'check_same_owner':
arch/mips/kernel/mips-mt-fpaff.c:53:22: error: invalid operands to
binary == (have 'kuid_t' and 'kuid_t')
arch/mips/kernel/mips-mt-fpaff.c:54:15: error: invalid operands to
binary == (have 'kuid_t' and 'kuid_t')

In order to ensure proper comparison between uids, using the helper
function uid_eq() which performs the right thing whenever this config
option is turned on or off.

Signed-off-by: Florian Fainelli 
Patchwork: https://patchwork.linux-mips.org/patch/4717/
Signed-off-by: Ralf Baechle

MIPS: Remove usage of CEVT_R4K_LIB config option.

2012-12-13T17:15:24+00:00

Manuel Lauss  writes:

I introduced it as a fallback because early revisions of Alchemy hardware
we shipped had a non-functional 32kHz timer and had to rely on the r4k
timer instead.  Previously the r4k timer was initialized regardless, but
it's useless with the "wait" instruction.

So long story short:   I need either the on-chip 32kHz timer OR the r4k
timer if the 32kHz one is unusable, but not both, and r4k timer is useless
when au1k_idle is in use.

The current in-kernel Alchemy boards all work with the 32kHz timer, so I'm
not against removing R4K_LIB symbols.

Signed-off-by: Ralf Baechle

MIPS: Remove usage of CSRC_R4K_LIB config option.

2012-12-13T17:15:24+00:00

Manuel Lauss  writes:

I introduced it as a fallback because early revisions of Alchemy hardware
we shipped had a non-functional 32kHz timer and had to rely on the r4k
timer instead.  Previously the r4k timer was initialized regardless, but
it's useless with the "wait" instruction.

So long story short:   I need either the on-chip 32kHz timer OR the r4k
timer if the 32kHz one is unusable, but not both, and r4k timer is useless
when au1k_idle is in use.

The current in-kernel Alchemy boards all work with the 32kHz timer, so I'm
not against removing R4K_LIB symbols.

Signed-off-by: Steven J. Hill 
Signed-off-by: Ralf Baechle

MIPS: Octeon: Add kexec and kdump support

2012-12-13T16:00:39+00:00

[ralf@linux-mips.org: Original patch by Maxim Uvarov 
with plenty of further shining, polishing, debugging and testing by me.]

Signed-off-by: Maxim Uvarov 
Cc: linux-mips@linux-mips.org
Cc: kexec@lists.infradead.org
Cc: horms@verge.net.au
Patchwork: https://patchwork.linux-mips.org/patch/1026/
Signed-off-by: Ralf Baechle

MIPS: kdump: Add support

2012-12-13T15:46:47+00:00

[ralf@linux-mips.org: Original patch by Maxim Uvarov 
with plenty of further shining, polishing, debugging and testing by me.]

Signed-off-by: Maxim Uvarov 
Cc: linux-mips@linux-mips.org
Cc: kexec@lists.infradead.org
Cc: horms@verge.net.au
Patchwork: https://patchwork.linux-mips.org/patch/1025/
Signed-off-by: Ralf Baechle