linux-stable.git/arch/mips, branch v4.0.7

MIPS: KVM: Do not sign extend on unsigned MMIO load

2015-06-23T00:03:30+00:00

commit ed9244e6c534612d2b5ae47feab2f55a0d4b4ced upstream.

Fix possible unintended sign extension in unsigned MMIO loads by casting
to uint16_t in the case of mmio_needed != 2.

Signed-off-by: Nicholas Mc Guire 
Reviewed-by: James Hogan 
Tested-by: James Hogan 
Cc: Gleb Natapov 
Cc: Paolo Bonzini 
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9985/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

MIPS: Fix enabling of DEBUG_STACKOVERFLOW

2015-06-23T00:03:30+00:00

commit 5f35b9cd553fd64415b563497d05a563c988dbd6 upstream.

Commit 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection") added
kernel stack overflow detection, however it only enabled it conditional
upon the preprocessor definition DEBUG_STACKOVERFLOW, which is never
actually defined. The Kconfig option is called DEBUG_STACKOVERFLOW,
which manifests to the preprocessor as CONFIG_DEBUG_STACKOVERFLOW, so
switch it to using that definition instead.

Fixes: 334c86c494b9 ("MIPS: IRQ: Add stackoverflow detection")
Signed-off-by: James Hogan 
Cc: Ralf Baechle 
Cc: Adam Jiang 
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/10531/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

MIPS: ralink: Fix clearing the illegal access interrupt

2015-06-23T00:03:30+00:00

commit 9dd6f1c166bc6e7b582f6203f2dc023ec65e3ed5 upstream.

Due to a typo the illegal access interrupt is never cleared in by
the interupt handler, causing an effective deadlock on the first
illegal access.

This was broken since the code was introduced in 5433acd81e87 ("MIPS:
ralink: add illegal access driver"), but only exposed when the Kconfig
symbol was added, thus enabling the code.

Fixes: a7b7aad383c ("MIPS: ralink: add missing symbol for RALINK_ILL_ACC")
Signed-off-by: Jonas Gorski 
Cc: linux-mips@linux-mips.org
Cc: John Crispin 
Patchwork: https://patchwork.linux-mips.org/patch/10172/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

MIPS: fix FP mode selection in lieu of .MIPS.abiflags data

2015-06-06T15:21:06+00:00

commit 620b155034570f577470cf5309f741bac6a6e32b upstream.

Commit 46490b572544 ("MIPS: kernel: elf: Improve the overall ABI and FPU
mode checks") reworked the ELF FP ABI mode selection logic, but when
CONFIG_MIPS_O32_FP64_SUPPORT is enabled it breaks the use of binaries
which have no PT_MIPS_ABIFLAGS program header & associated
.MIPS.abiflags section.

A default mode is selected based upon whether the ELF contains MIPS32 or
MIPS64 code, but that selection is made in arch_elf_pt_proc.
arch_elf_pt_proc only executes when a PT_MIPS_ABIFLAGS program header is
found. If one is not found then arch_elf_pt_proc is never called, and no
default overall_fp_mode value is selected. When arch_check_elf is
called, both abi0 & abi1 are MIPS_ABI_FP_UNKNOWN which leads to both
prog_req & interp_req being set to none_req. none_req matches none of
the conditions for mode selection at the end of arch_check_elf, so
overall_fp_mode is left untouched. Finally once mips_set_personality_fp
is called the BUG() in the default case is then hit & the kernel likely
panics.

Fix this by moving the selection of a default overall mode to the start
of arch_check_elf, which runs once per ELF executed regardless of
whether it has a PT_MIPS_ABIFLAGS program header.

Signed-off-by: Paul Burton 
Cc: Markos Chandras 
Cc: Matthew Fortune 
Cc: Ralf Baechle 
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/9978/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

MIPS: Makefile: Fix MIPS ASE detection code

2015-05-13T12:14:23+00:00

Commit 5306a5450824691e27d68f711758515debedeeac upstream.

Commit 32098ec7bcba ("MIPS: Makefile: Move the ASEs checks after
setting the core's CFLAGS") re-arranged the MIPS ASE detection code
and also added the current cflags to the detection logic. However,
this introduced a few bugs. First of all, the mips-cflags should not
be quoted since that ends up being passed as a string to subsequent
commands leading to broken detection from the cc-option-* tools.
Moreover, in order to avoid duplicating the cflags-y because of how
cc-option works, we rework the logic so we pass only those cflags which
are needed by the selected ASE. Finally, fix some typos resulting in MSA
not being detected correctly.

Signed-off-by: Markos Chandras 
Fixes: Commit 32098ec7bcba ("MIPS: Makefile: Move the ASEs checks after setting the core's CFLAGS")
Cc: Maciej W. Rozycki 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9661/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

MIPS: asm: elf: Set O32 default FPU flags

2015-05-13T12:14:23+00:00

Commit 48f8eaee3f59848809644507fc47363b37e54450 upstream.

Set good default FPU flags (FR0) for O32 binaries similar to what the
kernel does for the N64/N32 ones. This also fixes a regression
introduced in commit 46490b572544 ("MIPS: kernel: elf: Improve the
overall ABI and FPU mode checks") when MIPS_O32_FP64_SUPPORT is
disabled. In that case, the mips_set_personality_fp() did not set the
FPU mode at all because it assumed that the FPU mode was already set
properly. That led to O32 userland problems.

Signed-off-by: Markos Chandras 
Reported-by: Mans Rullgard 
Fixes: 46490b572544 ("MIPS: kernel: elf: Improve the overall ABI and FPU mode checks")
Tested-by: Mans Rullgard 
Tested-by: Aaro Koskinen 
Cc: Matthew Fortune 
Cc: Paul Burton 
Cc: linux-mips@linux-mips.org
Patchwork: http://patchwork.linux-mips.org/patch/9344/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

MIPS: BCM47XX: Fix detecting Microsoft MN-700 & Asus WL500G

2015-05-13T12:14:23+00:00

Commit 96f7c21363e0e0d19f3471f54a719ed06d708513 upstream.

Since the day of adding this code it was broken. We were iterating over
a wrong array and checking for wrong NVRAM entry.

Signed-off-by: Rafał Miłecki 
Cc: linux-mips@linux-mips.org
Cc: Hauke Mehrtens 
Patchwork: https://patchwork.linux-mips.org/patch/9654/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

MIPS: Kconfig: Disable SMP/CPS for 64-bit

2015-05-13T12:14:23+00:00

Commit 6ca716f2e5571d25a3899c6c5c91ff72ea6d6f5e upstream.

A 64-bit build for Malta produces far too many build problems
when SMP/CPS is selected. Moreover, there is currently no 64-bit
product with SMP/CPS so we disable SMP/CPS when building for
64-bit until it is properly supported.

Signed-off-by: Markos Chandras 
Cc: Paul Burton 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8573/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

MIPS: smp-cps: cpu_set FPU mask if FPU present

2015-05-13T12:14:22+00:00

Commit 90db024f140d0d6ad960cc5f090e3c8ed890ca55 upstream.

If we have an FPU, enroll ourselves in the FPU-full mask.
Matching the MT_SMP and CMP implementations of smp_setup.

Signed-off-by: Niklas Cassel 
Cc: paul.burton@imgtec.com
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8948/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

MIPS: ralink: add missing symbol for RALINK_ILL_ACC

2015-05-13T12:14:22+00:00

Commit a7b7aad383c5dd9221a06e378197350dd27c1163 upstream.

A driver was added in commit 5433acd81e87 ("MIPS: ralink: add illegal access
driver") without the Kconfig section being added. Fix this by adding the symbol
to the Kconfig file.

Signed-off-by: John Crispin 
Reported-by: Paul Bolle 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9299/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman