linux-toradex.git/arch/mips/Kconfig, branch v4.1.5

MIPS: Require O32 FP64 support for MIPS64 with O32 compat

2015-08-10T19:21:51+00:00

commit 4e9d324d4288b082497c30bc55b8ad13acc7cf01 upstream.

MIPS32r6 code requires FP64 (ie. FR=1) support. Building a kernel with
support for MIPS32r6 binaries but without support for O32 with FP64 is
therefore a problem which can lead to incorrectly executed userland.

CONFIG_MIPS_O32_FP64_SUPPORT is already selected when the kernel is
configured for MIPS32r6, but not when the kernel is configured for
MIPS64r6 with O32 compat support. Select CONFIG_MIPS_O32_FP64_SUPPORT in
such configurations to prevent building kernels which execute MIPS32r6
userland incorrectly.

Signed-off-by: Paul Burton 
Cc: Markos Chandras 
Cc: linux-mips@linux-mips.org
Cc: Matthew Fortune 
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/10674/
Signed-off-by: Ralf Baechle 
Signed-off-by: Greg Kroah-Hartman

Merge tag 'gpio-v4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio

2015-04-18T12:22:10+00:00

Pull GPIO updates from Linus Walleij:
"This is the bulk of GPIO changes for the v4.1 development cycle:

- A new GPIO hogging mechanism has been added. This can be used on
boards that want to drive some GPIO line high, low, or set it as
input on boot and then never touch it again. For some embedded
systems this is bliss and simplifies things to a great extent.

- Some API cleanup and closure: gpiod_get_array() and
gpiod_put_array() has been added to get and put GPIOs in bulk as
was possible with the non-descriptor API.

- Encapsulate cross-calls to the pin control subsystem in
. Now this should be the only header any GPIO
driver needs to include or something is wrong. Cleanups
restricting drivers to this include are welcomed if tested.

- Sort the GPIO Kconfig and split it into submenus, as it was
becoming and unstructured, illogical and unnavigatable mess. I
hope this is easier to follow. Menus that require a certain
subsystem like I2C can now be hidden nicely for example, still
working on others.

- New drivers:

- New driver for the Altera Soft GPIO.

- The F7188x driver now handles the F71869 and F71869A variants.

- The MIPS Loongson driver has been moved to drivers/gpio for
consolidation and cleanup.

- Cleanups:

- The MAX732x is converted to use the GPIOLIB_IRQCHIP
infrastructure.

- The PCF857x is converted to use the GPIOLIB_IRQCHIP
infrastructure.

- Radical cleanup of the OMAP driver.

- Misc:

- Enable the DWAPB GPIO for all architectures. This is a "hard
IP" block from Synopsys which has started to turn up in so
diverse architectures as X86 Quark, ARC and a slew of ARM
systems. So even though it's not an expander, it's generic
enough to be available for all.

- We add a mock GPIO on Crystalcove PMIC after a long discussion
with Daniel Vetter et al, tracing back to the shootout at the
kernel summit where DRM drivers and sub-componentization was
discussed. In this case a mock GPIO is assumed to be the best
compromise gaining some reuse of infrastructure without making
DRM drivers overly complex at the same time. Let's see"

* tag 'gpio-v4.1-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-gpio: (62 commits)
Revert "gpio: sch: use uapi/linux/pci_ids.h directly"
gpio: dwapb: remove dependencies
gpio: dwapb: enable for ARC
gpio: removing kfree remove functionality
gpio: mvebu: Fix mask/unmask managment per irq chip type
gpio: split GPIO drivers in submenus
gpio: move MFD GPIO drivers under their own comment
gpio: move BCM Kona Kconfig option
gpio: arrange SPI Kconfig symbols alphabetically
gpio: arrange PCI GPIO controllers alphabetically
gpio: arrange I2C Kconfig symbols alphabetically
gpio: arrange Kconfig symbols alphabetically
gpio: ich: Implement get_direction function
gpio: use (!foo) instead of (foo == NULL)
gpio: arizona: drop owner assignment from platform_drivers
gpio: max7300: remove 'ret' variable
gpio: use devm_kzalloc
gpio: sch: use uapi/linux/pci_ids.h directly
gpio: x-gene: fix devm_ioremap_resource() check
gpio: loongson: Add Loongson-3A/3B GPIO driver support
...

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

2015-04-17T19:50:54+00:00

Pull MIPS updates from Ralf Baechle:
 "This is the main pull request for MIPS for Linux 4.1.  Most
  noteworthy:

   - Add more Octeon-optimized crypto functions
   - Octeon crypto preemption and locking fixes
   - Little endian support for Octeon
   - Use correct CSR to soft reset Octeons
   - Support LEDs on the Octeon-based DSR-1000N
   - Fix PCI interrupt mapping for the Octeon-based DSR-1000N
   - Mark prom_free_prom_memory() as __init for a number of systems
   - Support for Imagination's Pistachio SOC.  This includes arch and
     CLK bits.  I'd like to merge pinctrl bits later
   - Improve parallelism of csum_partial for certain pipelines
   - Organize DTB files in subdirs like other architectures
   - Implement read_sched_clock for all MIPS platforms other than
     Octeon
   - Massive series of 38 fixes and cleanups for the FPU emulator /
     kernel
   - Further FPU remulator work to support new features.  This sits on a
     separate branch which also has been pulled into the 4.1 KVM branch
   - Clean up and fixes for the SEAD3 eval board; remove unused file
   - Various updates for Netlogic platforms
   - A number of small updates for Loongson 3 platforms
   - Increase the memory limit for ATH79 platforms to 256MB
   - A fair number of fixes and updates for BCM47xx platforms
   - Finish the implementation of XPA support
   - MIPS FDC support.  No, not floppy controller but Fast Debug Channel :)
   - Detect the R16000 used in SGI legacy platforms
   - Fix Kconfig dependencies for the SSB bus support"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (265 commits)
  MIPS: Makefile: Fix MIPS ASE detection code
  MIPS: asm: elf: Set O32 default FPU flags
  MIPS: BCM47XX: Fix detecting Microsoft MN-700 & Asus WL500G
  MIPS: Kconfig: Disable SMP/CPS for 64-bit
  MIPS: Hibernate: flush TLB entries earlier
  MIPS: smp-cps: cpu_set FPU mask if FPU present
  MIPS: lose_fpu(): Disable FPU when MSA enabled
  MIPS: ralink: add missing symbol for RALINK_ILL_ACC
  MIPS: ralink: Fix bad config symbol in PCI makefile.
  SSB: fix Kconfig dependencies
  MIPS: Malta: Detect and fix bad memsize values
  Revert "MIPS: Avoid pipeline stalls on some MIPS32R2 cores."
  MIPS: Octeon: Delete override of cpu_has_mips_r2_exec_hazard.
  MIPS: Fix cpu_has_mips_r2_exec_hazard.
  MIPS: kernel: entry.S: Set correct ISA level for mips_ihb
  MIPS: asm: spinlock: Fix addiu instruction for R10000_LLSC_WAR case
  MIPS: r4kcache: Use correct base register for MIPS R6 cache flushes
  MIPS: Kconfig: Fix typo for the r2-to-r6 emulator kernel parameter
  MIPS: unaligned: Fix regular load/store instruction emulation for EVA
  MIPS: unaligned: Surround load/store macros in do {} while statements
  ...

mm: split ET_DYN ASLR from mmap ASLR

2015-04-14T23:49:05+00:00

This fixes the "offset2lib" weakness in ASLR for arm, arm64, mips,
powerpc, and x86.  The problem is that if there is a leak of ASLR from
the executable (ET_DYN), it means a leak of shared library offset as
well (mmap), and vice versa.  Further details and a PoC of this attack
is available here:

  http://cybersecurity.upv.es/attacks/offset2lib/offset2lib.html

With this patch, a PIE linked executable (ET_DYN) has its own ASLR
region:

  $ ./show_mmaps_pie
  54859ccd6000-54859ccd7000 r-xp  ...  /tmp/show_mmaps_pie
  54859ced6000-54859ced7000 r--p  ...  /tmp/show_mmaps_pie
  54859ced7000-54859ced8000 rw-p  ...  /tmp/show_mmaps_pie
  7f75be764000-7f75be91f000 r-xp  ...  /lib/x86_64-linux-gnu/libc.so.6
  7f75be91f000-7f75beb1f000 ---p  ...  /lib/x86_64-linux-gnu/libc.so.6
  7f75beb1f000-7f75beb23000 r--p  ...  /lib/x86_64-linux-gnu/libc.so.6
  7f75beb23000-7f75beb25000 rw-p  ...  /lib/x86_64-linux-gnu/libc.so.6
  7f75beb25000-7f75beb2a000 rw-p  ...
  7f75beb2a000-7f75beb4d000 r-xp  ...  /lib64/ld-linux-x86-64.so.2
  7f75bed45000-7f75bed46000 rw-p  ...
  7f75bed46000-7f75bed47000 r-xp  ...
  7f75bed47000-7f75bed4c000 rw-p  ...
  7f75bed4c000-7f75bed4d000 r--p  ...  /lib64/ld-linux-x86-64.so.2
  7f75bed4d000-7f75bed4e000 rw-p  ...  /lib64/ld-linux-x86-64.so.2
  7f75bed4e000-7f75bed4f000 rw-p  ...
  7fffb3741000-7fffb3762000 rw-p  ...  [stack]
  7fffb377b000-7fffb377d000 r--p  ...  [vvar]
  7fffb377d000-7fffb377f000 r-xp  ...  [vdso]

The change is to add a call the newly created arch_mmap_rnd() into the
ELF loader for handling ET_DYN ASLR in a separate region from mmap ASLR,
as was already done on s390.  Removes CONFIG_BINFMT_ELF_RANDOMIZE_PIE,
which is no longer needed.

Signed-off-by: Kees Cook 
Reported-by: Hector Marco-Gisbert 
Cc: Russell King 
Reviewed-by: Ingo Molnar 
Cc: Catalin Marinas 
Cc: Will Deacon 
Cc: Ralf Baechle 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Michael Ellerman 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: Alexander Viro 
Cc: Oleg Nesterov 
Cc: Andy Lutomirski 
Cc: "David A. Long" 
Cc: Andrey Ryabinin 
Cc: Arun Chandran 
Cc: Yann Droneaud 
Cc: Min-Hua Chen 
Cc: Paul Burton 
Cc: Alex Smith 
Cc: Markos Chandras 
Cc: Vineeth Vijayan 
Cc: Jeff Bailey 
Cc: Michael Holzheu 
Cc: Ben Hutchings 
Cc: Behan Webster 
Cc: Ismael Ripoll 
Cc: Jan-Simon Mller 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: expose arch_mmap_rnd when available

2015-04-14T23:49:05+00:00

When an architecture fully supports randomizing the ELF load location,
a per-arch mmap_rnd() function is used to find a randomized mmap base.
In preparation for randomizing the location of ET_DYN binaries
separately from mmap, this renames and exports these functions as
arch_mmap_rnd(). Additionally introduces CONFIG_ARCH_HAS_ELF_RANDOMIZE
for describing this feature on architectures that support it
(which is a superset of ARCH_BINFMT_ELF_RANDOMIZE_PIE, since s390
already supports a separated ET_DYN ASLR from mmap ASLR without the
ARCH_BINFMT_ELF_RANDOMIZE_PIE logic).

Signed-off-by: Kees Cook 
Cc: Hector Marco-Gisbert 
Cc: Russell King 
Reviewed-by: Ingo Molnar 
Cc: Catalin Marinas 
Cc: Will Deacon 
Cc: Ralf Baechle 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Michael Ellerman 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: Alexander Viro 
Cc: Oleg Nesterov 
Cc: Andy Lutomirski 
Cc: "David A. Long" 
Cc: Andrey Ryabinin 
Cc: Arun Chandran 
Cc: Yann Droneaud 
Cc: Min-Hua Chen 
Cc: Paul Burton 
Cc: Alex Smith 
Cc: Markos Chandras 
Cc: Vineeth Vijayan 
Cc: Jeff Bailey 
Cc: Michael Holzheu 
Cc: Ben Hutchings 
Cc: Behan Webster 
Cc: Ismael Ripoll 
Cc: Jan-Simon Mller 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mips: expose number of page table levels on Kconfig level

2015-04-14T23:49:02+00:00

We would want to use number of page table level to define mm_struct.
Let's expose it as CONFIG_PGTABLE_LEVELS.

Signed-off-by: Kirill A. Shutemov 
Cc: Ralf Baechle 
Tested-by: Guenter Roeck 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branch '4.0-fixes' into mips-for-linux-next

2015-04-13T14:03:32+00:00

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

2015-04-10T13:41:52+00:00

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

MIPS: Kconfig: Fix typo for the r2-to-r6 emulator kernel parameter

2015-04-10T13:41:45+00:00

Commit b0a668fb2038 ("MIPS: kernel: mips-r2-to-r6-emul: Add R2 emulator
for MIPS R6") added the mips r2-to-r6 emulator so an R2 userland can be
executed on R6 kernels. This needed both build time and runtime support.
The runtime support needed the "mipsr2emu" kernel parameter instead of
the "mipsr2emul" listed in the Kconfig help message.

Signed-off-by: Markos Chandras 
Fixes: b0a668fb2038 ("MIPS: kernel: mips-r2-to-r6-emul: Add R2 emulator for MIPS R6")
Cc: linux-mips@linux-mips.org
Cc: Markos Chandras 
Patchwork: https://patchwork.linux-mips.org/patch/9504/
Signed-off-by: Ralf Baechle

gpio: loongson: Add Loongson-3A/3B GPIO driver support

2015-04-08T07:53:42+00:00

Improve Loongson-2's GPIO driver to support Loongson-3A/3B, and update
Loongson-3's default config file.

Acked-by: Ralf Baechle 
Signed-off-by: Huacai Chen 
Reviewed-by: Alexandre Courbot 
Signed-off-by: Linus Walleij