openwrt/staging/blogic.git
10 years agoARM: add comments to the early page table remap code
Russell King [Tue, 29 Jul 2014 08:27:13 +0000 (09:27 +0100)]
ARM: add comments to the early page table remap code

Add further comments to the early page table remap code to explain what
the code is doing, why it is doing it, but more importantly to explain
that the code is not architecturally compliant and is squarely in
"UNPREDICTABLE" behaviour territory.

Add a warning and tainting of the kernel too.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8122/1: smp_scu: enable SCU standby support
Shawn Guo [Thu, 31 Jul 2014 01:07:37 +0000 (02:07 +0100)]
ARM: 8122/1: smp_scu: enable SCU standby support

With SCU standby enabled, SCU CLK will be turned off when all processors
are in WFI mode.  And the clock will be turned on when any processor
leaves WFI mode.

This behavior should be preferable in terms of power efficiency of
system idle.  So let's set the SCU standby bit to enable the support in
function scu_enable().

Cortex-A9 earlier than r2p0 has no standby bit in SCU, so we need to
skip setting the bit for those.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Acked-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8121/1: smp_scu: use macro for SCU enable bit
Shawn Guo [Thu, 31 Jul 2014 01:07:00 +0000 (02:07 +0100)]
ARM: 8121/1: smp_scu: use macro for SCU enable bit

Use macro instead of magic number for SCU enable bit.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Acked-by: Soren Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8120/1: crypto: sha512: add ARM NEON implementation
Jussi Kivilinna [Tue, 29 Jul 2014 16:15:24 +0000 (17:15 +0100)]
ARM: 8120/1: crypto: sha512: add ARM NEON implementation

This patch adds ARM NEON assembly implementation of SHA-512 and SHA-384
algorithms.

tcrypt benchmark results on Cortex-A8, sha512-generic vs sha512-neon-asm:

block-size      bytes/update    old-vs-new
16              16              2.99x
64              16              2.67x
64              64              3.00x
256             16              2.64x
256             64              3.06x
256             256             3.33x
1024            16              2.53x
1024            256             3.39x
1024            1024            3.52x
2048            16              2.50x
2048            256             3.41x
2048            1024            3.54x
2048            2048            3.57x
4096            16              2.49x
4096            256             3.42x
4096            1024            3.56x
4096            4096            3.59x
8192            16              2.48x
8192            256             3.42x
8192            1024            3.56x
8192            4096            3.60x
8192            8192            3.60x

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8119/1: crypto: sha1: add ARM NEON implementation
Jussi Kivilinna [Tue, 29 Jul 2014 16:14:14 +0000 (17:14 +0100)]
ARM: 8119/1: crypto: sha1: add ARM NEON implementation

This patch adds ARM NEON assembly implementation of SHA-1 algorithm.

tcrypt benchmark results on Cortex-A8, sha1-arm-asm vs sha1-neon-asm:

block-size      bytes/update    old-vs-new
16              16              1.04x
64              16              1.02x
64              64              1.05x
256             16              1.03x
256             64              1.04x
256             256             1.30x
1024            16              1.03x
1024            256             1.36x
1024            1024            1.52x
2048            16              1.03x
2048            256             1.39x
2048            1024            1.55x
2048            2048            1.59x
4096            16              1.03x
4096            256             1.40x
4096            1024            1.57x
4096            4096            1.62x
8192            16              1.03x
8192            256             1.40x
8192            1024            1.58x
8192            4096            1.63x
8192            8192            1.63x

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Tested-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8118/1: crypto: sha1/make use of common SHA-1 structures
Jussi Kivilinna [Tue, 29 Jul 2014 16:14:09 +0000 (17:14 +0100)]
ARM: 8118/1: crypto: sha1/make use of common SHA-1 structures

Common SHA-1 structures are defined in <crypto/sha.h> for code sharing.

This patch changes SHA-1/ARM glue code to use these structures.

Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8113/1: remove remaining definitions of PLAT_PHYS_OFFSET from <mach/memory.h>
Uwe Kleine-König [Wed, 23 Jul 2014 19:37:43 +0000 (20:37 +0100)]
ARM: 8113/1: remove remaining definitions of PLAT_PHYS_OFFSET from <mach/memory.h>

The platforms selecting NEED_MACH_MEMORY_H defined the start address of
their physical memory in the respective <mach/memory.h>. With
ARM_PATCH_PHYS_VIRT=y (which is quite common today) this is useless
though because the definition isn't used but determined dynamically.

So remove the definitions from all <mach/memory.h> and provide the
Kconfig symbol PHYS_OFFSET with the respective defaults in case
ARM_PATCH_PHYS_VIRT isn't enabled.

This allows to drop the dependency of PHYS_OFFSET on !NEED_MACH_MEMORY_H
which prevents compiling an integrator nommu-kernel.
(CONFIG_PAGE_OFFSET which has "default PHYS_OFFSET if !MMU" expanded to
"0x" because CONFIG_PHYS_OFFSET doesn't exist as INTEGRATOR selects
NEED_MACH_MEMORY_H.)

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8111/1: Enable erratum 798181 for Broadcom Brahma-B15
Gregory Fong [Tue, 22 Jul 2014 23:34:23 +0000 (00:34 +0100)]
ARM: 8111/1: Enable erratum 798181 for Broadcom Brahma-B15

Broadcom Brahma-B15 (r0p0..r0p2) is also affected by Cortex-A15
erratum 798181, so enable the workaround for Brahma-B15.

Signed-off-by: Gregory Fong <gregory.0xf0@gmail.com>
Acked-by: Marc Carino <marc.ceeeee@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8110/1: do CPU-specific init for Broadcom Brahma15 cores
Marc Carino [Tue, 22 Jul 2014 23:31:43 +0000 (00:31 +0100)]
ARM: 8110/1: do CPU-specific init for Broadcom Brahma15 cores

Perform any CPU-specific initialization required on the
Broadcom Brahma-15 core.

Signed-off-by: Marc Carino <marc.ceeeee@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8109/1: mm: Modify pte_write and pmd_write logic for LPAE
Steven Capper [Fri, 18 Jul 2014 15:16:15 +0000 (16:16 +0100)]
ARM: 8109/1: mm: Modify pte_write and pmd_write logic for LPAE

For LPAE, we have the following means for encoding writable or dirty
ptes:
                              L_PTE_DIRTY       L_PTE_RDONLY
    !pte_dirty && !pte_write        0               1
    !pte_dirty && pte_write         0               1
    pte_dirty && !pte_write         1               1
    pte_dirty && pte_write          1               0

So we can't distinguish between writeable clean ptes and read only
ptes. This can cause problems with ptes being incorrectly flagged as
read only when they are writeable but not dirty.

This patch renumbers L_PTE_RDONLY from AP[2] to a software bit #58,
and adds additional logic to set AP[2] whenever the pte is read only
or not dirty. That way we can distinguish between clean writeable ptes
and read only ptes.

HugeTLB pages will use this new logic automatically.

We need to add some logic to Transparent HugePages to ensure that they
correctly interpret the revised pgprot permissions (L_PTE_RDONLY has
moved and no longer matches PMD_SECT_AP2). In the process of revising
THP, the names of the PMD software bits have been prefixed with L_ to
make them easier to distinguish from their hardware bit counterparts.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8108/1: mm: Introduce {pte,pmd}_isset and {pte,pmd}_isclear
Steven Capper [Fri, 18 Jul 2014 15:15:27 +0000 (16:15 +0100)]
ARM: 8108/1: mm: Introduce {pte,pmd}_isset and {pte,pmd}_isclear

Long descriptors on ARM are 64 bits, and some pte functions such as
pte_dirty return a bitwise-and of a flag with the pte value. If the
flag to be tested resides in the upper 32 bits of the pte, then we run
into the danger of the result being dropped if downcast.

For example:
gather_stats(page, md, pte_dirty(*pte), 1);
where pte_dirty(*pte) is downcast to an int.

This patch introduces a new macro pte_isset which performs the bitwise
and, then performs a double logical invert (where needed) to ensure
predictable downcasting. The logical inverse pte_isclear is also
introduced.

Equivalent pmd functions for Transparent HugePages have also been
added.

Signed-off-by: Steve Capper <steve.capper@linaro.org>
Reviewed-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8103/1: save/restore Cortex-A9 CP15 registers on suspend/resume
Shawn Guo [Wed, 16 Jul 2014 06:40:53 +0000 (07:40 +0100)]
ARM: 8103/1: save/restore Cortex-A9 CP15 registers on suspend/resume

The CP15 diagnostic register holds ARM errata bits on Cortex-A9, so it
needs to be saved/restored on suspend/resume.  Otherwise, the
effectiveness of errata workaround gets lost together with diagnostic
register bit across suspend/resume cycle.  And the CP15 power control
register of Cortex-A9 shares the same problem.

The patch adds a couple of Cortex-A9 specific suspend/resume functions
to save/restore these two Cortex-A9 CP15 registers across the
suspend/resume cycle.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8098/1: mcs lock: implement wfe-based polling for MCS locking
Will Deacon [Wed, 9 Jul 2014 18:31:28 +0000 (19:31 +0100)]
ARM: 8098/1: mcs lock: implement wfe-based polling for MCS locking

This patch introduces a wfe-based polling loop for spinning on contended
MCS locks and waking up corresponding waiters when the lock is released.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8091/2: add get_user() support for 8 byte types
Daniel Thompson [Thu, 10 Jul 2014 19:58:08 +0000 (20:58 +0100)]
ARM: 8091/2: add get_user() support for 8 byte types

Recent contributions, including to DRM and binder, introduce 64-bit
values in their interfaces. A common motivation for this is to allow
the same ABI for 32- and 64-bit userspaces (and therefore also a shared
ABI for 32/64 hybrid userspaces). Anyhow, the developers would like to
avoid gotchas like having to use copy_from_user().

This feature is already implemented on x86-32 and the majority of other
32-bit architectures. The current list of get_user_8 hold out
architectures are: arm, avr32, blackfin, m32r, metag, microblaze,
mn10300, sh.

Credit:

    My name sits rather uneasily at the top of this patch. The v1 and
    v2 versions of the patch were written by Rob Clark and to produce v4
    I mostly copied code from Russell King and H. Peter Anvin. However I
    have mangled the patch sufficiently that *blame* is rightfully mine
    even if credit should more widely shared.

Changelog:

v5: updated to use the ret macro (requested by Russell King)
v4: remove an inlined add on big endian systems (spotted by Russell King),
    used __ARMEB__ rather than BIG_ENDIAN (to match rest of file),
    cleared r3 on EFAULT during __get_user_8.
v3: fix a couple of checkpatch issues
v2: pass correct size to check_uaccess, and better handling of narrowing
    double word read with __get_user_xb() (Russell King's suggestion)
v1: original

Signed-off-by: Rob Clark <robdclark@gmail.com>
Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8097/1: unistd.h: relocate comments back to place
Baruch Siach [Wed, 9 Jul 2014 12:33:13 +0000 (13:33 +0100)]
ARM: 8097/1: unistd.h: relocate comments back to place

Commit cb8db5d45 (UAPI: (Scripted) Disintegrate arch/arm/include/asm) moved
these syscall comments out of their context into the UAPI headers. Fix this.

Fixes: cb8db5d4578a ("UAPI: (Scripted) Disintegrate arch/arm/include/asm")
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8096/1: Describe required sort order for textofs-y (TEXT_OFFSET)
Daniel Thompson [Tue, 8 Jul 2014 12:50:50 +0000 (13:50 +0100)]
ARM: 8096/1: Describe required sort order for textofs-y (TEXT_OFFSET)

The section of the makefile that determines the TEXT_OFFSET is sorted
by address so that, in multi-arch kernel builds, the architecture with the
most stringent requirements for the kernel base address gets to define
TEXT_OFFSET. The comment should reflect that.

Signed-off-by: Daniel Thompson <daniel.thompson@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8090/1: add revision info for PL310 errata 588369 and 727915
Shawn Guo [Tue, 8 Jul 2014 01:59:42 +0000 (02:59 +0100)]
ARM: 8090/1: add revision info for PL310 errata 588369 and 727915

Add revision info for PL310_ERRATA_588369 and PL310_ERRATA_727915 to
help people understand if they need to enable the errata for their
hardware.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8089/1: cpu_pj4b_suspend_size should base on cpu_v7_suspend_size
Shawn Guo [Thu, 3 Jul 2014 08:56:59 +0000 (09:56 +0100)]
ARM: 8089/1: cpu_pj4b_suspend_size should base on cpu_v7_suspend_size

Since pj4b suspend/resume routines are implemented based on generic
ARMv7 ones, instead of hard-coding cpu_pj4b_suspend_size, we should have
it be cpu_v7_suspend_size plus pj4b specific bytes.  Otherwise, if
cpu_v7_suspend_size gets updated alone, the pj4b suspend/resume will
likely be broken.

While at it, fix the comments in cpu_pj4b_do_resume, as we're restoring
CP15 registers rather than saving in there.

Signed-off-by: Shawn Guo <shawn.guo@freescale.com>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8088/1: vmlinux.lds.S: drop redundant .comment
Mark Rutland [Mon, 30 Jun 2014 14:40:40 +0000 (15:40 +0100)]
ARM: 8088/1: vmlinux.lds.S: drop redundant .comment

Commit 78d7530ac3 ("ARM: Clean up linker script using new linker script
macros.") modified the arm kernel linker script to use the STABS_DEBUG
macro, but left a .comment section definition. As STABS_DEBUG defines
the .comment section in an identical way, the second section definition
is redundant and can be removed.

This patch removes the redundant .comment section definition.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8075/1: oprofile: Use of arm_get_current_stackframe
Nikolay Borisov [Tue, 3 Jun 2014 18:51:32 +0000 (19:51 +0100)]
ARM: 8075/1: oprofile: Use of arm_get_current_stackframe

Use the newly introduced API so that FP is correctly referenced from
either R7/R11 based on whether we are running in THUMB2 mode or not.

Signed-off-by: Nikolay Borisov <Nikolay.Borisov@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Robert Richter <rric@kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8074/1: traps: Make use of the frame_pointer macro
Nikolay Borisov [Tue, 3 Jun 2014 18:50:09 +0000 (19:50 +0100)]
ARM: 8074/1: traps: Make use of the frame_pointer macro

Use the newly-introduced frame_pointer macro to extract
the correct FP based on whether we are in THUMB2 mode or not.

Signed-off-by: Nikolay Borisov <Nikolay.Borisov@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8073/1: unwind: Use arm_get_current_stackframe
Nikolay Borisov [Tue, 3 Jun 2014 18:49:14 +0000 (19:49 +0100)]
ARM: 8073/1: unwind: Use arm_get_current_stackframe

Make the unwind code use the correct API so that the frame pointer
is extracted from the correct register.

Signed-off-by: Nikolay Borisov <Nikolay.Borisov@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8072/1: time: Make use of arm_get_current_stackframe
Nikolay Borisov [Tue, 3 Jun 2014 18:48:58 +0000 (19:48 +0100)]
ARM: 8072/1: time: Make use of arm_get_current_stackframe

Make use of the arm_get_current_stackframe api so that
the frame pointer is correctly referenced in THUMB2 mode

Signed-off-by: Nikolay Borisov <Nikolay.Borisov@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8071/1: perf: Make perf use arm_get_current_stackframe
Nikolay Borisov [Tue, 3 Jun 2014 18:48:43 +0000 (19:48 +0100)]
ARM: 8071/1: perf: Make perf use arm_get_current_stackframe

Make the perf backend use the API so that it correctly references the FP
when in THUMB2 mode

Signed-off-by: Nikolay Borisov <Nikolay.Borisov@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8070/1: Introduce arm_get_current_stack_frame()
Nikolay Borisov [Tue, 3 Jun 2014 18:48:10 +0000 (19:48 +0100)]
ARM: 8070/1: Introduce arm_get_current_stack_frame()

Currently there are numerous places where "struct pt_regs" are used to
populate "struct stackframe", however all of those location do not
consider the situation where the kernel might be compiled in THUMB2
mode, in which case the framepointer member of pt_regs become ARM_r7
instead of ARM_fp (r11). Document this idiosyncracy in the
definition of "struct stackframe"

The easiest solution is to introduce a new function (in the spirit of
https://groups.google.com/forum/#!topic/linux.kernel/dA2YuUcSpZ4)
which would hide the complexity of initializing the stackframe struct
from pt_regs.

Also implement a macro frame_pointer(regs) that would return the correct
register so that we can use it in cases where we just require the frame
pointer and not a whole struct stackframe

Signed-off-by: Nikolay Borisov <Nikolay.Borisov@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Robert Richter <rric@kernel.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8079/1: zImage: identify kernel endianness
Nicolas Pitre [Thu, 19 Jun 2014 21:44:32 +0000 (22:44 +0100)]
ARM: 8079/1: zImage: identify kernel endianness

With patch #8067/1 ("zImage: ensure header in LE format for BE8 kernels")
applied, it is no longer possible to determine the endianness of a compiled
kernel image.  This normally shouldn't matter to the boot environment,
except for those cases where the selection of a ramdisk or root filesystem
with a matching endianness has to be automated.

Let's add a flag to the zImage header indicating the actual endianness.
Four bytes from offset 0x30 can be interpreted as follows:

04 03 02 01 big endian kernel

01 02 03 04 little endian kernel

Anything else should be interpreted as "unknown", in which case it is
most likely that patch #8067/1 was not applied either and the zImage
magic number at offset 0x24 could be used instead to determine
endianness. No zImage before this patch ever produced 0x01020304 nor
0x04030201 at offset 0x30 so there is no confusion possible.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: alignment: save last kernel aligned fault location
Russell King [Fri, 4 Jul 2014 13:32:43 +0000 (14:32 +0100)]
ARM: alignment: save last kernel aligned fault location

Save and report (via the procfs file) the last kernel unaligned fault
location.  This allows us to trivially inspect where the last fault
happened for cases which we don't expect to occur.

Since we expect the kernel to generate misalignment faults (due to
the networking layer), even when warnings are enabled, we don't log
them for the kernel.

Tested-by: Tony Lindgren <tony@atomide.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+
Russell King [Mon, 30 Jun 2014 15:29:12 +0000 (16:29 +0100)]
ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+

ARMv6 and greater introduced a new instruction ("bx") which can be used
to return from function calls.  Recent CPUs perform better when the
"bx lr" instruction is used rather than the "mov pc, lr" instruction,
and this sequence is strongly recommended to be used by the ARM
architecture manual (section A.4.1.1).

We provide a new macro "ret" with all its variants for the condition
code which will resolve to the appropriate instruction.

Rather than doing this piecemeal, and miss some instances, change all
the "mov pc" instances to use the new macro, with the exception of
the "movs" instruction and the kprobes code.  This allows us to detect
the "mov pc, lr" case and fix it up - and also gives us the possibility
of deploying this for other registers depending on the CPU selection.

Reported-by: Will Deacon <will.deacon@arm.com>
Tested-by: Stephen Warren <swarren@nvidia.com> # Tegra Jetson TK1
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr> # mioa701_bootresume.S
Tested-by: Andrew Lunn <andrew@lunn.ch> # Kirkwood
Tested-by: Shawn Guo <shawn.guo@freescale.com>
Tested-by: Tony Lindgren <tony@atomide.com> # OMAPs
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com> # Armada XP, 375, 385
Acked-by: Sekhar Nori <nsekhar@ti.com> # DaVinci
Acked-by: Christoffer Dall <christoffer.dall@linaro.org> # kvm/hyp
Acked-by: Haojian Zhuang <haojian.zhuang@gmail.com> # PXA3xx
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> # Xen
Tested-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> # ARMv7M
Tested-by: Simon Horman <horms+renesas@verge.net.au> # Shmobile
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: make it easier to check the CPU part number correctly
Russell King [Tue, 24 Jun 2014 18:43:15 +0000 (19:43 +0100)]
ARM: make it easier to check the CPU part number correctly

Ensure that platform maintainers check the CPU part number in the right
manner: the CPU part number is meaningless without also checking the
CPU implement(e|o)r (choose your preferred spelling!)  Provide an
interface which returns both the implementer and part number together,
and update the definitions to include the implementer.

Mark the old function as being deprecated... indeed, using the old
function with the definitions will now always evaluate as false, so
people must update their un-merged code to the new function.  While
this could be avoided by adding new definitions, we'd also have to
create new names for them which would be awkward.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8099/1: EXYNOS: Fix MCPM build with SUSPEND=n
Krzysztof Kozlowski [Mon, 14 Jul 2014 12:59:03 +0000 (13:59 +0100)]
ARM: 8099/1: EXYNOS: Fix MCPM build with SUSPEND=n

Building of EXYNOS5420_MCPM with disabled SUSPEND fails:
arch/arm/mach-exynos/built-in.o: In function `exynos_mcpm_init':
arch/arm/mach-exynos/mcpm-exynos.c:361: undefined reference to `mcpm_loopback'

The exynos_mcpm_init() in mcp-exynos.c calls mcpm_loopback() which
depends on cpu_suspend function (ARM_CPU_SUSPEND).

Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8083/1: exynos: activate the CCI on boot CPU/cluster using the MCPM loopback
Nicolas Pitre [Tue, 24 Jun 2014 17:36:32 +0000 (18:36 +0100)]
ARM: 8083/1: exynos: activate the CCI on boot CPU/cluster using the MCPM loopback

The Chromebook firmware doesn't enable the CCI for the boot cpu, and
arguably it shouldn't have to either. Let's have the kernel handle the

CCI on its own for the boot CPU the same way it does it for secondary CPUs
by using the MCPM loopback.

This allows to boot all 8 cores on exynos5420-peach-pit,
exynos5800-peach-pi and ARM Chromebook 2.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Tushar Behera <tushar.b@samsung.com>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8082/1: TC2: test the MCPM loopback during boot
Nicolas Pitre [Tue, 24 Jun 2014 17:34:38 +0000 (18:34 +0100)]
ARM: 8082/1: TC2: test the MCPM loopback during boot

This is not strictly needed on TC2 but still a good idea to exercise
that code.

Signed-off-by: nicolas Pitre <nico@linaro.org>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8081/1: MCPM: provide infrastructure to allow for MCPM loopback
Nicolas Pitre [Tue, 24 Jun 2014 17:32:51 +0000 (18:32 +0100)]
ARM: 8081/1: MCPM: provide infrastructure to allow for MCPM loopback

The kernel already has the responsibility to handle resources such as the

CCI when hotplugging CPUs, during the booting of secondary CPUs, and when
resuming from suspend/idle.  It would be more coherent and less confusing
if the CCI for the boot CPU (or cluster)  was also initialized by the
kernel rather than expecting the firmware/bootloader to do it and only in
that case. After all, the kernel has all the necessary code already and
the bootloader shouldn't have to care at all.

The CCI may be turned on only when the cache is off. Leveraging the CPU
suspend code to loop back through the low-level MCPM entry point is all
that is needed to properly turn on the CCI from the kernel by using the
same code as during secondary boot.

Let's provide a generic MCPM loopback function that can be invoked by
backend initialization code to set things (CCI or similar) on the boot
CPU just as it is done for the other CPUs.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Kevin Hilman <khilman@linaro.org>
Tested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8101/1: mach-iop13xx: fix possible build failure
Arnd Bergmann [Mon, 14 Jul 2014 17:07:36 +0000 (18:07 +0100)]
ARM: 8101/1: mach-iop13xx: fix possible build failure

After applying patch:
"ARM: 8078/1: get rid of hardcoded assumptions about kernel stack size"

following build failure happens on iop13xx platform:

   In file included from include/linux/srcu.h:33:0,
                    from include/linux/notifier.h:15,
                    from include/linux/reboot.h:5,
                    from arch/arm/mach-iop13xx/include/mach/iop13xx.h:6,
                    from arch/arm/mach-iop13xx/include/mach/hardware.h:14,
                    from arch/arm/mach-iop13xx/include/mach/memory.h:4,
                    from arch/arm/include/asm/memory.h:24,
                    from arch/arm/include/asm/page.h:163,
                    from arch/arm/include/asm/thread_info.h:17,
                    from include/linux/thread_info.h:54,
                    from include/asm-generic/preempt.h:4,
                    from arch/arm/include/generated/asm/preempt.h:1,
                    from include/linux/preempt.h:18,
                    from include/linux/spinlock.h:50,
                    from include/linux/seqlock.h:35,
                    from include/linux/time.h:5,
                    from include/uapi/linux/timex.h:56,
                    from include/linux/timex.h:56,
                    from include/linux/sched.h:19,
                    from arch/arm/kernel/asm-offsets.c:13:
   include/linux/rcupdate.h: In function '__rcu_read_lock':
>> include/linux/rcupdate.h:220:2: error: implicit declaration of function 'preempt_disable' [-Werror=implicit-function-declaration]
     preempt_disable();

The problem here is recursive header inclusion which could be avoided by
removing linux/reboot.h from mach/iop13xxx.h.
linux/reboot.h in include/mach/iop13xx.h is needed only for enum reboot_mode,
so header it could be replaced with a enum declaration.

Whatever patch "ARM: 8078/1: get rid of hardcoded assumptions about kernel stack size"
does, I think it's good to avoid unnecessary header inclusion here in any case.

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Reported-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8078/1: get rid of hardcoded assumptions about kernel stack size
Andrey Ryabinin [Wed, 18 Jun 2014 15:12:40 +0000 (16:12 +0100)]
ARM: 8078/1: get rid of hardcoded assumptions about kernel stack size

Changing kernel stack size on arm is not as simple as it should be:
1) THREAD_SIZE macro doesn't respect PAGE_SIZE and THREAD_SIZE_ORDER
2) stack size is hardcoded in get_thread_info macro

This patch fixes it by calculating THREAD_SIZE and thread_info address
taking into account PAGE_SIZE and THREAD_SIZE_ORDER.

Now changing stack size becomes simply changing THREAD_SIZE_ORDER.

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: simplify generation of compressed vmlinux.lds file
Russell King [Tue, 17 Jun 2014 14:00:54 +0000 (15:00 +0100)]
ARM: simplify generation of compressed vmlinux.lds file

As we are now using the C preprocessor, we do not need to use sed to
edit constants in this file, and then pass the resulting file through
the C preprocessor.  Instead, rely solely on the C preprocessor to
rewrite TEXT_START and BSS_ADDR.

Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8067/1: zImage: ensure header in LE format for BE8 kernels
Nicolas Pitre [Mon, 2 Jun 2014 16:32:25 +0000 (17:32 +0100)]
ARM: 8067/1: zImage: ensure header in LE format for BE8 kernels

All known BE8-capable systems have LE bootloaders, so we need to ensure
that the magic number and image start/end values are in little endian
format.

[ben.dooks@codethink.co.uk: from nico's original email on this subject]
[taras.kondratiuk@linaro.org: removed lds.S->lds rule, added target to extra-y]

Signed-off-by: Nicolas Pitre <nico@fluxnic.net>
Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
Signed-off-by: Taras Kondratiuk <taras.kondratiuk@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: OMAP: add deprecation message for legacy OMAP DMA API
Russell King [Sat, 7 Jun 2014 09:47:36 +0000 (10:47 +0100)]
ARM: OMAP: add deprecation message for legacy OMAP DMA API

The legacy OMAP DMA API is now deprecated; all remaining users should
now convert over ASAP to using the DMA engine API instead of the OMAP
private API.

Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoLinux 3.16-rc3
Linus Torvalds [Sun, 29 Jun 2014 21:11:36 +0000 (14:11 -0700)]
Linux 3.16-rc3

10 years agoMerge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
Linus Torvalds [Sun, 29 Jun 2014 20:40:08 +0000 (13:40 -0700)]
Merge branch 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm

Pull ARM fixes from Russell King:
 "Another round of ARM fixes.  The largest change here is the L2 changes
  to work around problems for the Armada 37x/380 devices, where most of
  the size comes down to comments rather than code.

  The other significant fix here is for the ptrace code, to ensure that
  rewritten syscalls work as intended.  This was pointed out by Kees
  Cook, but Will Deacon reworked the patch to be more elegant.

  The remainder are fairly trivial changes"

* 'fixes' of git://ftp.arm.linux.org.uk/~rmk/linux-arm:
  ARM: 8087/1: ptrace: reload syscall number after secure_computing() check
  ARM: 8086/1: Set memblock limit for nommu
  ARM: 8085/1: sa1100: collie: add top boot mtd partition
  ARM: 8084/1: sa1100: collie: revert back to cfi_probe
  ARM: 8080/1: mcpm.h: remove unused variable declaration
  ARM: 8076/1: mm: add support for HW coherent systems in PL310 cache

10 years agoMAINTAINERS: exceptions for Documentation maintainer
Randy Dunlap [Sat, 28 Jun 2014 01:28:56 +0000 (18:28 -0700)]
MAINTAINERS: exceptions for Documentation maintainer

Note that I don't maintain Documentation/ABI/,
Documentation/devicetree/, or the language translation files.

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoDocumentation: add section about git to email-clients.txt
Dan Carpenter [Sat, 28 Jun 2014 01:28:46 +0000 (18:28 -0700)]
Documentation: add section about git to email-clients.txt

These days most people use git to send patches so I have added a section
about that.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoARM: 8087/1: ptrace: reload syscall number after secure_computing() check
Will Deacon [Fri, 27 Jun 2014 16:01:47 +0000 (17:01 +0100)]
ARM: 8087/1: ptrace: reload syscall number after secure_computing() check

On the syscall tracing path, we call out to secure_computing() to allow
seccomp to check the syscall number being attempted. As part of this, a
SIGTRAP may be sent to the tracer and the syscall could be re-written by
a subsequent SET_SYSCALL ptrace request. Unfortunately, this new syscall
is ignored by the current code unless TIF_SYSCALL_TRACE is also set on
the current thread.

This patch slightly reworks the enter path of the syscall tracing code
so that we always reload the syscall number from
current_thread_info()->syscall after the potential ptrace traps.

Acked-by: Kees Cook <keescook@chromium.org>
Tested-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8086/1: Set memblock limit for nommu
Laura Abbott [Fri, 27 Jun 2014 09:17:27 +0000 (10:17 +0100)]
ARM: 8086/1: Set memblock limit for nommu

Commit 1c2f87c (ARM: 8025/1: Get rid of meminfo) changed find_limits
to use memblock_get_current_limit for calculating the max_low pfn.
nommu targets never actually set a limit on memblock though which
means memblock_get_current_limit will just return the default
value. Set the memblock_limit to be the end of DDR to make sure
bounds are calculated correctly.

Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8085/1: sa1100: collie: add top boot mtd partition
Andrea Adami [Wed, 25 Jun 2014 21:32:26 +0000 (22:32 +0100)]
ARM: 8085/1: sa1100: collie: add top boot mtd partition

The CFI mapping is now perfect so we can expose the top block, read only.
There isn't much to read, though, just the sharpsl_params values.

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8084/1: sa1100: collie: revert back to cfi_probe
Andrea Adami [Wed, 25 Jun 2014 21:31:15 +0000 (22:31 +0100)]
ARM: 8084/1: sa1100: collie: revert back to cfi_probe

Reverts commit d26b17edafc45187c30cae134a5e5429d58ad676
ARM: sa1100: collie.c: fall back to jedec_probe flash detection

Unfortunately the detection was challenged on the defective unit used for tests:
one of the NOR chips did not respond to the CFI query.
Moreover that bad device needed extra delays on erase-suspend/resume cycles.

Tested personally on 3 different units and with feedback of two other users.

Signed-off-by: Andrea Adami <andrea.adami@gmail.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8080/1: mcpm.h: remove unused variable declaration
Nicolas Pitre [Thu, 19 Jun 2014 21:57:01 +0000 (22:57 +0100)]
ARM: 8080/1: mcpm.h: remove unused variable declaration

The sync_phys variable has been replaced by link time computation in
mcpm_head.S before the code was submitted upstream.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoARM: 8076/1: mm: add support for HW coherent systems in PL310 cache
Thomas Petazzoni [Fri, 13 Jun 2014 09:58:38 +0000 (10:58 +0100)]
ARM: 8076/1: mm: add support for HW coherent systems in PL310 cache

When a PL310 cache is used on a system that provides hardware
coherency, the outer cache sync operation is useless, and can be
skipped. Moreover, on some systems, it is harmful as it causes
deadlocks between the Marvell coherency mechanism, the Marvell PCIe
controller and the Cortex-A9.

To avoid this, this commit introduces a new Device Tree property
'arm,io-coherent' for the L2 cache controller node, valid only for the
PL310 cache. It identifies the usage of the PL310 cache in an I/O
coherent configuration. Internally, it makes the driver disable the
outer cache sync operation.

Note that technically speaking, a fully coherent system wouldn't
require any of the other .outer_cache operations. However, in
practice, when booting secondary CPUs, these are not yet coherent, and
therefore a set of cache maintenance operations are necessary at this
point. This explains why we keep the other .outer_cache operations and
only ->sync is disabled.

While in theory any write to a PL310 register could cause the
deadlock, in practice, disabling ->sync is sufficient to workaround
the deadlock, since the other cache maintenance operations are only
used in very specific situations.

Contrary to previous versions of this patch, this new version does not
simply NULL-ify the ->sync member, because the l2c_init_data
structures are now 'const' and therefore cannot be modified, which is
a good thing. Therefore, this patch introduces a separate
l2c_init_data instance, called of_l2c310_coherent_data.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
10 years agoMerge tag 'spi-v3.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi
Linus Torvalds [Sat, 28 Jun 2014 18:32:32 +0000 (11:32 -0700)]
Merge tag 'spi-v3.16-rc2' of git://git./linux/kernel/git/broonie/spi

Pull spi fixes from Mark Brown:
 "A few driver specific fixes, the biggest one being a fix for the newly
  added Qualcomm SPI controller driver to make it not use its internal
  chip select due to hardware bugs, replacing it with GPIOs"

* tag 'spi-v3.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi:
  spi: qup: Remove chip select function
  spi: qup: Fix order of spi_register_master
  spi: sh-sci: fix use-after-free in sh_sci_spi_remove()
  spi/pxa2xx: fix incorrect SW mode chipselect setting for BayTrail LPSS SPI

10 years agoMerge tag 'regulator-v3.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 28 Jun 2014 18:31:58 +0000 (11:31 -0700)]
Merge tag 'regulator-v3.16-rc2' of git://git./linux/kernel/git/broonie/regulator

Pull regulator fixes from Mark Brown:
 "Several driver specific fixes here, the palmas fixes being especially
  important for a range of boards - the recent updates to support new
  devices have introduced several regressions"

* tag 'regulator-v3.16-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
  regulator: tps65218: Correct the the config register for LDO1
  regulator: tps65218: Add the missing of_node assignment in probe
  regulator: palmas: fix typo in enable_reg calculation
  regulator: bcm590xx: fix vbus name
  regulator: palmas: Fix SMPS enable/disable/is_enabled

10 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
Linus Torvalds [Sat, 28 Jun 2014 16:43:58 +0000 (09:43 -0700)]
Merge git://git./linux/kernel/git/nab/target-pending

Pull SCSI target fixes from Nicholas Bellinger:
 "Mostly minor fixes this time around.  The highlights include:

   - iscsi-target CHAP authentication fixes to enforce explicit key
     values (Tejas Vaykole + rahul.rane)
   - fix a long-standing OOPs in target-core when a alua configfs
     attribute is accessed after port symlink has been removed.
     (Sebastian Herbszt)
   - fix a v3.10.y iscsi-target regression causing the login reject
     status class/detail to be ignored (Christoph Vu-Brugier)
   - fix a v3.10.y iscsi-target regression to avoid rejecting an
     existing ITT during Data-Out when data-direction is wrong (Santosh
     Kulkarni + Arshad Hussain)
   - fix a iscsi-target related shutdown deadlock on UP kernels (Mikulas
     Patocka)
   - fix a v3.16-rc1 build issue with vhost-scsi + !CONFIG_NET (MST)"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  iscsi-target: fix iscsit_del_np deadlock on unload
  iovec: move memcpy_from/toiovecend to lib/iovec.c
  iscsi-target: Avoid rejecting incorrect ITT for Data-Out
  tcm_loop: Fix memory leak in tcm_loop_submission_work error path
  iscsi-target: Explicily clear login response PDU in exception path
  target: Fix left-over se_lun->lun_sep pointer OOPs
  iscsi-target; Enforce 1024 byte maximum for CHAP_C key value
  iscsi-target: Convert chap_server_compute_md5 to use kstrtoul

10 years agoMerge remote-tracking branches 'spi/fix/pxa2xx', 'spi/fix/qup' and 'spi/fix/sh-sci...
Mark Brown [Sat, 28 Jun 2014 13:01:23 +0000 (14:01 +0100)]
Merge remote-tracking branches 'spi/fix/pxa2xx', 'spi/fix/qup' and 'spi/fix/sh-sci' into spi-linus

10 years agoMerge remote-tracking branches 'regulator/fix/bcm590xx', 'regulator/fix/palmas' and...
Mark Brown [Sat, 28 Jun 2014 13:01:04 +0000 (14:01 +0100)]
Merge remote-tracking branches 'regulator/fix/bcm590xx', 'regulator/fix/palmas' and 'regulator/fix/tps65218' into regulator-linus

10 years agoiscsi-target: fix iscsit_del_np deadlock on unload
Mikulas Patocka [Mon, 23 Jun 2014 17:42:37 +0000 (13:42 -0400)]
iscsi-target: fix iscsit_del_np deadlock on unload

On uniprocessor preemptible kernel, target core deadlocks on unload. The
following events happen:
* iscsit_del_np is called
* it calls send_sig(SIGINT, np->np_thread, 1);
* the scheduler switches to the np_thread
* the np_thread is woken up, it sees that kthread_should_stop() returns
  false, so it doesn't terminate
* the np_thread clears signals with flush_signals(current); and goes back
  to sleep in iscsit_accept_np
* the scheduler switches back to iscsit_del_np
* iscsit_del_np calls kthread_stop(np->np_thread);
* the np_thread is waiting in iscsit_accept_np and it doesn't respond to
  kthread_stop

The deadlock could be resolved if the administrator sends SIGINT signal to
the np_thread with killall -INT iscsi_np

The reproducible deadlock was introduced in commit
db6077fd0b7dd41dc6ff18329cec979379071f87, but the thread-stopping code was
racy even before.

This patch fixes the problem. Using kthread_should_stop to stop the
np_thread is unreliable, so we test np_thread_state instead. If
np_thread_state equals ISCSI_NP_THREAD_SHUTDOWN, the thread exits.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
10 years agoMerge tag 'iommu-fixes-v3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 28 Jun 2014 02:00:45 +0000 (19:00 -0700)]
Merge tag 'iommu-fixes-v3.16-rc1' of git://git./linux/kernel/git/joro/iommu

Pull IOMMU fixes from Joerg Roedel:

 - fix VT-d regression with handling multiple RMRR entries per device

 - fix a small race that was left in the mmu_notifier handling in the
   AMD IOMMUv2 driver

* tag 'iommu-fixes-v3.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu:
  iommu/amd: Fix small race between invalidate_range_end/start
  iommu/vt-d: fix bug in handling multiple RMRRs for the same PCI device

10 years agoMerge branch 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Linus Torvalds [Sat, 28 Jun 2014 01:43:03 +0000 (18:43 -0700)]
Merge branch 'x86/urgent' of git://git./linux/kernel/git/tip/tip

Pull x86 fixes from Peter Anvin:
 "A pile of fixes related to the VDSO, EFI and 32-bit badsys handling.

  It turns out that removing the section headers from the VDSO breaks
  gdb, so this puts back most of them.  A very simple typo broke
  rt_sigreturn on some versions of glibc, with obviously disastrous
  results.  The rest is pretty much fixes for the corresponding fallout.

  The EFI fixes fixes an arithmetic overflow on 32-bit systems and
  quiets some build warnings.

  Finally, when invoking an invalid system call number on x86-32, we
  bypass a bunch of handling, which can make the audit code oops"

* 'x86/urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  efi-pstore: Fix an overflow on 32-bit builds
  x86/vdso: Error out in vdso2c if DT_RELA is present
  x86/vdso: Move DISABLE_BRANCH_PROFILING into the vdso makefile
  x86_32, signal: Fix vdso rt_sigreturn
  x86_32, entry: Do syscall exit work on badsys (CVE-2014-4508)
  x86/vdso: Create .build-id links for unstripped vdso files
  x86/vdso: Remove some redundant in-memory section headers
  x86/vdso: Improve the fake section headers
  x86/vdso2c: Use better macros for ELF bitness
  x86/vdso: Discard the __bug_table section
  efi: Fix compiler warnings (unused, const, type)

10 years agoMerge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Linus Torvalds [Sat, 28 Jun 2014 01:37:56 +0000 (18:37 -0700)]
Merge branch 'upstream' of git://git.linux-mips.org/ralf/upstream-linus

Pull MIPS fixes from Ralf Baechle:
 "This is dominated by a large number of changes necessary for the MIPS
  BPF code.  code.  Aside of that there are

   - a fix for the MSC system controller support code.
   - a Turbochannel fix.
   - a recordmcount fix that's MIPS-specific.
   - barrier fixes to smp-cps / pm-cps after unrelated changes elsewhere
     in the kernel.
   - revert support for MSA registers in the signal frames.  The
     reverted patch did modify the signal stack frame which of course is
     inacceptable.
   - fix math-emu build breakage with older compilers.
   - some related cleanup.
   - fix Lasat build error if CONFIG_CRC32 isn't set to y by the user"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (27 commits)
  MIPS: Lasat: Fix build error if CRC32 is not enabled.
  TC: Handle device_register() errors.
  MIPS: MSC: Prevent out-of-bounds writes to MIPS SC ioremap'd region
  MIPS: bpf: Fix stack space allocation for BPF memwords on MIPS64
  MIPS: BPF: Use 32 or 64-bit load instruction to load an address to register
  MIPS: bpf: Fix PKT_TYPE case for big-endian cores
  MIPS: BPF: Prevent kernel fall over for >=32bit shifts
  MIPS: bpf: Drop update_on_xread and always initialize the X register
  MIPS: bpf: Fix is_range() semantics
  MIPS: bpf: Use pr_debug instead of pr_warn for unhandled opcodes
  MIPS: bpf: Fix return values for VLAN_TAG_PRESENT case
  MIPS: bpf: Use correct mask for VLAN_TAG case
  MIPS: bpf: Fix branch conditional for BPF_J{GT/GE} cases
  MIPS: bpf: Add SEEN_SKB to flags when looking for the PKT_TYPE
  MIPS: bpf: Use 'andi' instead of 'and' for the VLAN cases
  MIPS: bpf: Return error code if the offset is a negative number
  MIPS: bpf: Use the LO register to get division's quotient
  MIPS: mm: uasm: Fix lh micro-assembler instruction
  MIPS: uasm: Add SLT uasm instruction
  MIPS: uasm: Add s3s1s2 instruction builder
  ...

10 years agoMerge tag 'arc-fixes-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupt...
Linus Torvalds [Sat, 28 Jun 2014 01:36:50 +0000 (18:36 -0700)]
Merge tag 'arc-fixes-for-3.16' of git://git./linux/kernel/git/vgupta/arc

Pull ARC fixes from Vineet Gupta:
 "Some SMP changes, a ptrace request for NPTL debugging, bunch of build
  breakages/warnings"

* tag 'arc-fixes-for-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc:
  ARC: [SMP] Enable icache coherency
  ARC: [SMP] Fix IPI IRQ registration
  ARC: Implement ptrace(PTRACE_GET_THREAD_AREA)
  ARC: optimize kernel bss clearing in early boot code
  ARC: Fix build breakage for !CONFIG_ARC_DW2_UNWIND
  ARC: fix build warning in devtree
  ARC: remove checks for CONFIG_ARC_MMU_V4

10 years agoMerge tag 'compress-3.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
Linus Torvalds [Sat, 28 Jun 2014 01:33:49 +0000 (18:33 -0700)]
Merge tag 'compress-3.16-rc3' of git://git./linux/kernel/git/gregkh/driver-core

Pull compress bugfix from Greg KH:
 "Here is another lz4 bugfix for 3.16-rc3 that resolves a reported issue
  with that compression algorithm"

* tag 'compress-3.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  lz4: fix another possible overrun

10 years agoMerge tag 'stable/for-linus-3.16-rc1-tag' of git://git.kernel.org/pub/scm/linux/kerne...
Linus Torvalds [Sat, 28 Jun 2014 01:04:22 +0000 (18:04 -0700)]
Merge tag 'stable/for-linus-3.16-rc1-tag' of git://git./linux/kernel/git/konrad/swiotlb

Pull swiotlb bugfix from Konrad Rzeszutek Wilk:
 "One bug-fix that had been in tree for quite some time.  We had assumed
  that the physical address zero was invalid and would fail it.  But
  that is not true and on some architectures it is not reserved and
  valid.  This fixes it"

* tag 'stable/for-linus-3.16-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/swiotlb:
  swiotlb: don't assume PA 0 is invalid

10 years agoMerge tag 'sound-3.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Sat, 28 Jun 2014 00:21:36 +0000 (17:21 -0700)]
Merge tag 'sound-3.16-rc3' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "Here includes a few patchset for fixing mostly HD-audio issues in
  addition to a patch assuring the compress API bytes alignment and a
  fix for the die-hard existing race condition at USB-audio
  disconnection.  The volume looks big in Realtek HD-audio code, but
  it's just a translation of the fixup tables, and the actual changes
  are rather trivial"

* tag 'sound-3.16-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
  ALSA: hda - restore BCLK M/N values when resuming HSW/BDW display controller
  ALSA: usb-audio: Fix races at disconnection and PCM closing
  ALSA: hda - Adjust speaker HPF and add LED support for HP Spectre 13
  ALSA: hda - Make the pin quirk tables use the SND_HDA_PIN_QUIRK macro
  ALSA: hda - Make a SND_HDA_PIN_QUIRK macro
  ALSA: hda - Add pin quirk for Dell XPS 15
  ALSA: hda - hdmi: call overridden init on resume
  ALSA: hda - Fix usage of "model" module parameter
  ALSA: compress: fix the struct alignment to 4 bytes

10 years agoMerge tag 'mfd-fixes-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd
Linus Torvalds [Sat, 28 Jun 2014 00:20:48 +0000 (17:20 -0700)]
Merge tag 'mfd-fixes-3.16' of git://git./linux/kernel/git/lee/mfd

Pull MFD fixes from Lee Jones:
 "Couple of simple fixes due for the v3.16 -rcs"

* tag 'mfd-fixes-3.16' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd:
  mfd: ab8500: Fix dt irq mapping
  mfd: davinci: Voicecodec needs regmap_mmio
  mfd: STw481x: Allow modular build
  mfd: UCB1x00: Enable modular build

10 years agoMerge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Linus Torvalds [Sat, 28 Jun 2014 00:05:39 +0000 (17:05 -0700)]
Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

Pull drm fixes from Dave Airlie:
 "Exynos, i915 and msm fixes and one core fix.

  exynos:
     hdmi power off and mixer issues

  msm:
     iommu, build fixes,

  i915:
     regression races and warning fixes"

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux: (22 commits)
  drm/i915: vlv_prepare_pll is only needed in case of non DSI interfaces
  drm: fix NULL pointer access by wrong ioctl
  drm/exynos: enable vsync interrupt while waiting for vblank
  drm/exynos: soft reset mixer before reconfigure after power-on
  drm/exynos: allow multiple layer updates per vsync for mixer
  drm/i915: Hold the table lock whilst walking the file's idr and counting the objects in debugfs
  drm/i915: BDW: Adding Reserved PCI IDs.
  drm/i915: Only mark the ctx as initialised after a SET_CONTEXT operation
  drm/exynos: stop mixer before gating clocks during poweroff
  drm/exynos: set power state variable after enabling clocks and power
  drm/exynos: disable unused windows on apply
  drm/exynos: Fix de-registration ordering
  drm/exynos: change zero to NULL for sparse
  drm/exynos: dpi: Fix NULL pointer dereference with legacy bindings
  drm/exynos: hdmi: fix power order issue
  drm/i915: default to having backlight if VBT not available
  drm/i915: cache hw power well enabled state
  drm/msm: fix IOMMU cleanup for -EPROBE_DEFER
  drm/msm: use PAGE_ALIGNED instead of IS_ALIGNED(PAGE_SIZE)
  drm/msm/hdmi: set hdp clock rate before prepare_enable
  ...

10 years agoiovec: move memcpy_from/toiovecend to lib/iovec.c
Michael S. Tsirkin [Thu, 19 Jun 2014 18:22:56 +0000 (21:22 +0300)]
iovec: move memcpy_from/toiovecend to lib/iovec.c

ERROR: "memcpy_fromiovecend" [drivers/vhost/vhost_scsi.ko] undefined!

commit 9f977ef7b671f6169eca78bf40f230fe84b7c7e5
    vhost-scsi: Include prot_bytes into expected data transfer length
in target-pending makes drivers/vhost/scsi.c call memcpy_fromiovecend().
This function is not available when CONFIG_NET is not enabled.

socket.h already includes uio.h, so no callers need updating.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
10 years agoiscsi-target: Avoid rejecting incorrect ITT for Data-Out
Nicholas Bellinger [Fri, 20 Jun 2014 17:59:57 +0000 (10:59 -0700)]
iscsi-target: Avoid rejecting incorrect ITT for Data-Out

This patch changes iscsit_check_dataout_hdr() to dump the incoming
Data-Out payload when the received ITT is not associated with a
WRITE, instead of calling iscsit_reject_cmd() for the non WRITE
ITT descriptor.

This addresses a bug where an initiator sending an Data-Out for
an ITT associated with a READ would end up generating a reject
for the READ, eventually resulting in list corruption.

Reported-by: Santosh Kulkarni <santosh.kulkarni@calsoftinc.com>
Reported-by: Arshad Hussain <arshad.hussain@calsoftinc.com>
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
10 years agolz4: fix another possible overrun
Greg Kroah-Hartman [Tue, 24 Jun 2014 20:59:01 +0000 (16:59 -0400)]
lz4: fix another possible overrun

There is one other possible overrun in the lz4 code as implemented by
Linux at this point in time (which differs from the upstream lz4
codebase, but will get synced at in a future kernel release.)  As
pointed out by Don, we also need to check the overflow in the data
itself.

While we are at it, replace the odd error return value with just a
"simple" -1 value as the return value is never used for anything other
than a basic "did this work or not" check.

Reported-by: "Don A. Bailey" <donb@securitymouse.com>
Reported-by: Willy Tarreau <w@1wt.eu>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
10 years agoMerge tag 'efi-urgent' into x86/urgent
H. Peter Anvin [Fri, 27 Jun 2014 14:55:24 +0000 (07:55 -0700)]
Merge tag 'efi-urgent' into x86/urgent

 * Fix a few compiler warnings (one being a real bug) in the arm64 EFI
   code that lots of people are running into and reporting - Catalin Marinas

 * Use a cast to avoid a 32-bit overflow issue when generating pstore
   filenames - Andrzej Zaborowski

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
10 years agoefi-pstore: Fix an overflow on 32-bit builds
Andrzej Zaborowski [Mon, 9 Jun 2014 14:50:40 +0000 (16:50 +0200)]
efi-pstore: Fix an overflow on 32-bit builds

In generic_id the long int timestamp is multiplied by 100000 and needs
an explicit cast to u64.

Without that the id in the resulting pstore filename is wrong and
userspace may have problems parsing it, but more importantly files in
pstore can never be deleted and may fill the EFI flash (brick device?).
This happens because when generic pstore code wants to delete a file,
it passes the id to the EFI backend which reinterpretes it and a wrong
variable name is attempted to be deleted.  There's no error message but
after remounting pstore, deleted files would reappear.

Signed-off-by: Andrew Zaborowski <andrew.zaborowski@intel.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
10 years agoMerge tag 'drm-intel-fixes-2014-06-26' of git://anongit.freedesktop.org/drm-intel...
Dave Airlie [Fri, 27 Jun 2014 05:04:06 +0000 (15:04 +1000)]
Merge tag 'drm-intel-fixes-2014-06-26' of git://anongit.freedesktop.org/drm-intel into drm-fixes

Fixes for 3.16-rc2; regressions, races, and warns; Broadwell PCI IDs.

* tag 'drm-intel-fixes-2014-06-26' of git://anongit.freedesktop.org/drm-intel:
  drm/i915: vlv_prepare_pll is only needed in case of non DSI interfaces
  drm/i915: Hold the table lock whilst walking the file's idr and counting the objects in debugfs
  drm/i915: BDW: Adding Reserved PCI IDs.
  drm/i915: Only mark the ctx as initialised after a SET_CONTEXT operation
  drm/i915: default to having backlight if VBT not available
  drm/i915: cache hw power well enabled state

10 years agotcm_loop: Fix memory leak in tcm_loop_submission_work error path
Nicholas Bellinger [Tue, 17 Jun 2014 22:23:03 +0000 (22:23 +0000)]
tcm_loop: Fix memory leak in tcm_loop_submission_work error path

This patch fixes a tcm_loop_cmd descriptor memory leak in the
tcm_loop_submission_work() error path, and would result in
warnings about leaked tcm_loop_cmd_cache objects at module
unload time.

Go ahead and invoke kmem_cache_free() to release tl_cmd back to
tcm_loop_cmd_cache before calling sc->scsi_done().

Reported-by: Sebastian Herbszt <herbszt@gmx.de>
Tested-by: Sebastian Herbszt <herbszt@gmx.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
10 years agoiscsi-target: Explicily clear login response PDU in exception path
Nicholas Bellinger [Tue, 17 Jun 2014 21:54:38 +0000 (21:54 +0000)]
iscsi-target: Explicily clear login response PDU in exception path

This patch adds a explicit memset to the login response PDU
exception path in iscsit_tx_login_rsp().

This addresses a regression bug introduced in commit baa4d64b
where the initiator would end up not receiving the login
response and associated status class + detail, before closing
the login connection.

Reported-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr>
Tested-by: Christophe Vu-Brugier <cvubrugier@yahoo.fr>
Cc: stable@vger.kernel.org # 3.10+
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
10 years agotarget: Fix left-over se_lun->lun_sep pointer OOPs
Nicholas Bellinger [Mon, 16 Jun 2014 20:25:54 +0000 (20:25 +0000)]
target: Fix left-over se_lun->lun_sep pointer OOPs

This patch fixes a left-over se_lun->lun_sep pointer OOPs when one
of the /sys/kernel/config/target/$FABRIC/$WWPN/$TPGT/lun/$LUN/alua*
attributes is accessed after the $DEVICE symlink has been removed.

To address this bug, go ahead and clear se_lun->lun_sep memory in
core_dev_unexport(), so that the existing checks for show/store
ALUA attributes in target_core_fabric_configfs.c work as expected.

Reported-by: Sebastian Herbszt <herbszt@gmx.de>
Tested-by: Sebastian Herbszt <herbszt@gmx.de>
Cc: stable@vger.kernel.org
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
10 years agoiscsi-target; Enforce 1024 byte maximum for CHAP_C key value
Nicholas Bellinger [Fri, 13 Jun 2014 04:28:31 +0000 (04:28 +0000)]
iscsi-target; Enforce 1024 byte maximum for CHAP_C key value

This patch adds a check in chap_server_compute_md5() to enforce a
1024 byte maximum for the CHAP_C key value following the requirement
in RFC-3720 Section 11.1.4:

   "..., C and R are large-binary-values and their binary length (not
   the length of the character string that represents them in encoded
   form) MUST not exceed 1024 bytes."

Reported-by: rahul.rane <rahul.rane@calsoftinc.com>
Tested-by: rahul.rane <rahul.rane@calsoftinc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
10 years agoiscsi-target: Convert chap_server_compute_md5 to use kstrtoul
Nicholas Bellinger [Fri, 13 Jun 2014 04:05:16 +0000 (04:05 +0000)]
iscsi-target: Convert chap_server_compute_md5 to use kstrtoul

This patch converts chap_server_compute_md5() from simple_strtoul() to
kstrtoul usage().

This addresses the case where a empty 'CHAP_I=' key value received during
mutual authentication would be converted to a '0' by simple_strtoul(),
instead of failing the login attempt.

Reported-by: Tejas Vaykole <tejas.vaykole@calsoftinc.com>
Tested-by: Tejas Vaykole <tejas.vaykole@calsoftinc.com>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
10 years agoMerge branch 'for-linus' of git://git.kernel.dk/linux-block
Linus Torvalds [Thu, 26 Jun 2014 20:06:13 +0000 (13:06 -0700)]
Merge branch 'for-linus' of git://git.kernel.dk/linux-block

Pull block fixes from Jens Axboe:
 "A small collection of fixes/changes for the current series.  This
  contains:

   - Removal of dead code from Gu Zheng.

   - Revert of two bad fixes that went in earlier in this round, marking
     things as __init that were not purely used from init.

   - A fix for blk_mq_start_hw_queue() using the __blk_mq_run_hw_queue(),
     which could place us wrongly.  Make it use the non __ variant,
     which handles cases where we are called from the wrong CPU set.
     From me.

   - A fix for drbd, which allocates discard requests without room for
     the SCSI payload.  From Lars Ellenberg.

   - A fix for user-after-free in the blkcg code from Tejun.

   - Addition of limiting gaps in SG lists, if the hardware needs it.
     This is the last pre-req patch for blk-mq to enable the full NVMe
     conversion.  Could wait until 3.17, but it's simple enough so would
     be nice to have everything we need for the NVMe port in the 3.17
     release.  From me"

* 'for-linus' of git://git.kernel.dk/linux-block:
  drbd: fix NULL pointer deref in blk_add_request_payload
  blk-mq: blk_mq_start_hw_queue() should use blk_mq_run_hw_queue()
  block: add support for limiting gaps in SG lists
  bio: remove unused macro bip_vec_idx()
  Revert "block: add __init to elv_register"
  Revert "block: add __init to blkcg_policy_register"
  blkcg: fix use-after-free in __blkg_release_rcu() by making blkcg_gq refcnt an atomic_t
  floppy: format block0 read error message properly

10 years agoFix 32-bit regression in block device read(2)
Al Viro [Mon, 23 Jun 2014 07:44:40 +0000 (08:44 +0100)]
Fix 32-bit regression in block device read(2)

blkdev_read_iter() wants to cap the iov_iter by the amount of data
remaining to the end of device.  That's what iov_iter_truncate() is for
(trim iter->count if it's above the given limit).  So far, so good, but
the argument of iov_iter_truncate() is size_t, so on 32bit boxen (in
case of a large device) we end up with that upper limit truncated down
to 32 bits *before* comparing it with iter->count.

Easily fixed by making iov_iter_truncate() take 64bit argument - it does
the right thing after such change (we only reach the assignment in there
when the current value of iter->count is greater than the limit, i.e.
for anything that would get truncated we don't reach the assignment at
all) and that argument is not the new value of iter->count - it's an
upper limit for such.

The overhead of passing u64 is not an issue - the thing is inlined, so
callers passing size_t won't pay any penalty.

Reported-and-tested-by: Theodore Tso <tytso@mit.edu>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Tested-by: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
Tested-by: Bruno Wolff III <bruno@wolff.to>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
10 years agoALSA: hda - restore BCLK M/N values when resuming HSW/BDW display controller
Mengdong Lin [Thu, 26 Jun 2014 10:45:16 +0000 (18:45 +0800)]
ALSA: hda - restore BCLK M/N values when resuming HSW/BDW display controller

For Intel Haswell/Broadwell display HD-A controller, the 24MHz HD-A link BCLK
is converted from Core Display Clock (CDCLK): BCLK = CDCLK * M / N
And there are two registers EM4 and EM5 to program M, N value respectively.
The EM4/EM5 values will be lost and when the display power well is disabled.

BIOS programs CDCLK selected by OEM and EM4/EM5, but BIOS has no idea about
display power well on/off at runtime. So the M/N can be wrong if non-default
CDCLK is used when the audio controller resumes, which results in an invalid
BCLK and abnormal audio playback rate. So this patch saves and restores valid
M/N values on controller suspend/resume.

And 'struct hda_intel' is defined to contain standard HD-A 'struct azx' and
Intel specific fields, as Takashi suggested.

Signed-off-by: Mengdong Lin <mengdong.lin@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
10 years agoMIPS: Lasat: Fix build error if CRC32 is not enabled.
Ralf Baechle [Thu, 26 Jun 2014 13:43:01 +0000 (14:43 +0100)]
MIPS: Lasat: Fix build error if CRC32 is not enabled.

Kconfig doesn't select CRC32 so it's possible to build a Lasat kernel
without CONFIG_CRC32 resulting in a build error:

  LD      vmlinux
arch/mips/built-in.o: In function `lasat_init_board_info':
(.text+0x22c): undefined reference to `crc32_le'
arch/mips/built-in.o: In function `lasat_write_eeprom_info':
(.text+0x7fc): undefined reference to `crc32_le'
make: *** [vmlinux] Error 1

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agomfd: ab8500: Fix dt irq mapping
Grygorii Strashko [Mon, 2 Jun 2014 16:27:58 +0000 (19:27 +0300)]
mfd: ab8500: Fix dt irq mapping

The AD8500 defines itself as interrupt-controller in DT,
but it doesn't assign DT node to IRQ domain when creates it.
As result, of_irq_xx() helpers don't work because they can't
find necessary IRQ domain.

Hence, fix it by assigning AD8500 core device DT node to IRQ
domain when it's created.

This patch fixes STE u8500 Snowball boot failure reported by Kevin Hilman
https://lkml.org/lkml/2014/5/27/624

Reported-and-tested-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
10 years agomfd: davinci: Voicecodec needs regmap_mmio
Arnd Bergmann [Thu, 5 Jun 2014 21:24:13 +0000 (23:24 +0200)]
mfd: davinci: Voicecodec needs regmap_mmio

Without REGMAP_MMIO, building that driver results in a link error:

drivers/built-in.o: In function `davinci_vc_probe':
:(.init.text+0x3c1c): undefined reference to `devm_regmap_init_mmio_clk'

This adds a Kconfig 'select' statement as the usual way to ensure
that REGMAP_MMIO is enabled.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
10 years agomfd: STw481x: Allow modular build
Arnd Bergmann [Thu, 5 Jun 2014 21:24:14 +0000 (23:24 +0200)]
mfd: STw481x: Allow modular build

This driver depends on I2C, which may be a loadable module.
While you'd probably want both to be built-in in practice,
allowing a modular build avoids possible randconfig link
errors.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
10 years agomfd: UCB1x00: Enable modular build
Arnd Bergmann [Thu, 5 Jun 2014 21:24:12 +0000 (23:24 +0200)]
mfd: UCB1x00: Enable modular build

The UCB1200 / UCB1300 driver uses the MCP_SA11X0 driver, which
can be a loadable module, but this results in a link error
when UCB1200 itself is built-in:

drivers/built-in.o: In function `ucb1x00_io_set_dir':
:(.text+0x4a364): undefined reference to `mcp_reg_write'
drivers/built-in.o: In function `ucb1x00_io_write':
:(.text+0x4a3dc): undefined reference to `mcp_reg_write'
drivers/built-in.o: In function `ucb1x00_io_read':
:(.text+0x4a400): undefined reference to `mcp_reg_read'
drivers/built-in.o: In function `ucb1x00_adc_enable':
:(.text+0x4a460): undefined reference to `mcp_enable'
...

This can easily be resolved by making CONFIG_MCP_UCB1200 itself
a tristate option, since that causes Kconfig to track the
dependency correctly.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
10 years agoTC: Handle device_register() errors.
Levente Kurusa [Wed, 2 Apr 2014 10:00:37 +0000 (12:00 +0200)]
TC: Handle device_register() errors.

Make the TURBOchannel driver bail out if the call to device_register()
failed.

Signed-off-by: Levente Kurusa <levex@linux.com>
Acked-by: Maciej W. Rozycki <macro@linux-mips.org>
Cc: LKML <linux-kernel@vger.kernel.org>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/6673/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: MSC: Prevent out-of-bounds writes to MIPS SC ioremap'd region
Markos Chandras [Mon, 23 Jun 2014 08:48:51 +0000 (09:48 +0100)]
MIPS: MSC: Prevent out-of-bounds writes to MIPS SC ioremap'd region

Previously, the lower limit for the MIPS SC initialization loop was
set incorrectly allowing one extra loop leading to writes
beyond the MSC ioremap'd space. More precisely, the value of the 'imp'
in the last loop increased beyond the msc_irqmap_t boundaries and
as a result of which, the 'n' variable was loaded with an incorrect
value. This value was used later on to calculate the offset in the
MSC01_IC_SUP which led to random crashes like the following one:

CPU 0 Unable to handle kernel paging request at virtual address e75c0200,
epc == 8058dba4, ra == 8058db90
[...]
Call Trace:
[<8058dba4>] init_msc_irqs+0x104/0x154
[<8058b5bc>] arch_init_irq+0xd8/0x154
[<805897b0>] start_kernel+0x220/0x36c

Kernel panic - not syncing: Attempted to kill the idle task!

This patch fixes the problem

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: stable@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7118/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Fix stack space allocation for BPF memwords on MIPS64
Markos Chandras [Mon, 23 Jun 2014 09:39:00 +0000 (10:39 +0100)]
MIPS: bpf: Fix stack space allocation for BPF memwords on MIPS64

When allocating stack space for BPF memwords we need to use the
appropriate 32 or 64-bit instruction to avoid losing the top 32 bits
of the stack pointer.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7135/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: BPF: Use 32 or 64-bit load instruction to load an address to register
Markos Chandras [Wed, 25 Jun 2014 08:39:38 +0000 (09:39 +0100)]
MIPS: BPF: Use 32 or 64-bit load instruction to load an address to register

When loading a pointer to register we need to use the appropriate
32 or 64bit instruction to preserve the pointers' top 32bits.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7180/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Fix PKT_TYPE case for big-endian cores
Markos Chandras [Mon, 23 Jun 2014 09:38:58 +0000 (10:38 +0100)]
MIPS: bpf: Fix PKT_TYPE case for big-endian cores

The skb->pkt_type field is defined as follows:

u8 pkt_type:3,
   fclone:2,
   ipvs_property:1,
   peeked:1,
   nf_trace:1

resulting to the following layout in big-endian systems

[pkt_type][fclone][ipvs_propery][peeked][nf_trace]
^                                                ^
|                                                |
LSB                                             MSB

As a result, the existing code did not work because it was trying to
match pkt_type == 7 whereas in reality it is 7<<5 on big-endian
systems.

This has been fixed in the interpreter in
0dcceabb0c1bf2d4c12a748df9933fad303072a7
"net: filter: fix SKF_AD_PKTTYPE extension on big-endian"

The fix is to look for 7<<5 on big-endian systems for the pkt_type
field, and shift by 5 so the packet type will be at the lower 3 bits
of the A register.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7132/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: BPF: Prevent kernel fall over for >=32bit shifts
Markos Chandras [Wed, 25 Jun 2014 08:37:21 +0000 (09:37 +0100)]
MIPS: BPF: Prevent kernel fall over for >=32bit shifts

Remove BUG_ON() if the shift immediate is >=32 to avoid kernel crashes
due to malicious user input. If the shift immediate is >= 32,
we simply load the destination register with 0 since only
32-bit instructions are used by JIT so this will do the
correct thing even on MIPS64.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7179/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Drop update_on_xread and always initialize the X register
Markos Chandras [Mon, 23 Jun 2014 09:38:56 +0000 (10:38 +0100)]
MIPS: bpf: Drop update_on_xread and always initialize the X register

Previously, update_on_xread() only set the reset flag if SEEN_X hasn't
been set already. However, SEEN_X is used to indicate that X is used
as destination or source register so there are some cases where X
is only used as source register and we really need to make sure that it
has been initialized in time. As a result of which, drop this function and
always set X to zero if it's used in any of the opcodes.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7133/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Fix is_range() semantics
Markos Chandras [Mon, 23 Jun 2014 09:38:55 +0000 (10:38 +0100)]
MIPS: bpf: Fix is_range() semantics

is_range() was meant to check whether the number is within
the s16 range or not. However the return values and consumers expected
the exact opposite. We fix that by inverting the logic in the function
to return 'true' for < s16 and 'false' for > s16.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Reported-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7131/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Use pr_debug instead of pr_warn for unhandled opcodes
Markos Chandras [Mon, 23 Jun 2014 09:38:54 +0000 (10:38 +0100)]
MIPS: bpf: Use pr_debug instead of pr_warn for unhandled opcodes

We should prevent spamming the logs during normal execution of bpf-jit.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Suggested-by: Alexei Starovoitov <ast@plumgrid.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7129/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Fix return values for VLAN_TAG_PRESENT case
Markos Chandras [Mon, 23 Jun 2014 09:38:53 +0000 (10:38 +0100)]
MIPS: bpf: Fix return values for VLAN_TAG_PRESENT case

If VLAN_TAG_PRESENT is not zero, then return 1 as expected by
classic BPF. Otherwise return 0.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7128/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Use correct mask for VLAN_TAG case
Markos Chandras [Mon, 23 Jun 2014 09:38:52 +0000 (10:38 +0100)]
MIPS: bpf: Use correct mask for VLAN_TAG case

Using VLAN_VID_MASK is not correct to get the vlan tag. Use
~VLAN_PRESENT_MASK instead and make sure it's u16 so the top 16-bits
will be removed. This will ensure that the emit_andi() code will not
treat this as a big 32-bit unsigned value.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7127/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Fix branch conditional for BPF_J{GT/GE} cases
Markos Chandras [Mon, 23 Jun 2014 09:38:51 +0000 (10:38 +0100)]
MIPS: bpf: Fix branch conditional for BPF_J{GT/GE} cases

The sltiu and sltu instructions will set the scratch register
to 1 if A <= X|K so fix the emitted branch conditional to check
for scratch != zero rather than scratch >= zero which would complicate
the resuling branch logic given that MIPS does not have a BGT or BGET
instructions to compare general purpose registers directly.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7126/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Add SEEN_SKB to flags when looking for the PKT_TYPE
Markos Chandras [Mon, 23 Jun 2014 09:38:50 +0000 (10:38 +0100)]
MIPS: bpf: Add SEEN_SKB to flags when looking for the PKT_TYPE

The SKF_AD_PKTTYPE uses the skb pointer so make sure it's in the
flags so it will be initialized in time.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7125/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Use 'andi' instead of 'and' for the VLAN cases
Markos Chandras [Mon, 23 Jun 2014 09:38:49 +0000 (10:38 +0100)]
MIPS: bpf: Use 'andi' instead of 'and' for the VLAN cases

The VLAN_VID_MASK and VLAN_TAG_PRESENT are immediates, so using
'and' which expects 3 registers will produce wrong results. Fix
this by using the 'andi' instruction.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7124/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Return error code if the offset is a negative number
Markos Chandras [Mon, 23 Jun 2014 09:38:48 +0000 (10:38 +0100)]
MIPS: bpf: Return error code if the offset is a negative number

Previously, the negative offset was not checked leading to failures
due to trying to load data beyond the skb struct boundaries. Until we
have proper asm helpers in place, it's best if we return ENOSUPP if K
is negative when trying to JIT the filter or 0 during runtime if we
do an indirect load where the value of X is unknown during build time.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7123/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: bpf: Use the LO register to get division's quotient
Markos Chandras [Mon, 23 Jun 2014 09:38:47 +0000 (10:38 +0100)]
MIPS: bpf: Use the LO register to get division's quotient

Reading from the HI register to get the division result is wrong.
The quotient is placed in the LO register.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Daniel Borkmann <dborkman@redhat.com>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: netdev@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7122/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: mm: uasm: Fix lh micro-assembler instruction
Markos Chandras [Mon, 23 Jun 2014 09:38:46 +0000 (10:38 +0100)]
MIPS: mm: uasm: Fix lh micro-assembler instruction

Commit d6b3314b49e12e8c349deb4ca28e7028db00728f "MIPS: uasm: Add lh uam
instruction" added the 'lh' micro-assembler instruction but it used the
'lw' opcode for it. Fix it by using the correct 'lh' opcode.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7121/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
10 years agoMIPS: uasm: Add SLT uasm instruction
Markos Chandras [Mon, 23 Jun 2014 09:38:45 +0000 (10:38 +0100)]
MIPS: uasm: Add SLT uasm instruction

It will be used later on by bpf-jit

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Markos Chandras <markos.chandras@imgtec.com>
Patchwork: https://patchwork.linux-mips.org/patch/7120/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>