ARM: tlb: don't perform inner-shareable invalidation for local BP ops

Now that the ASID allocator doesn't require inner-shareable maintenance,
we can convert the local_bp_flush_all function to perfo

ARM: tlb: don't perform inner-shareable invalidation for local BP ops

Now that the ASID allocator doesn't require inner-shareable maintenance,
we can convert the local_bp_flush_all function to perform only
non-shareable flushing, in a similar manner to the TLB invalidation
routines.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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ARM: tlb: don't bother with barriers for branch predictor maintenance

Branch predictor maintenance is only required when we are either
changing the kernel's view of memory (switching tables complete

ARM: tlb: don't bother with barriers for branch predictor maintenance

Branch predictor maintenance is only required when we are either
changing the kernel's view of memory (switching tables completely) or
dealing with ASID rollover.

Both of these use-cases require subsequent TLB invalidation, which has
the relevant barrier instructions to ensure completion and visibility
of the maintenance, so this patch removes the instruction barrier from
[local_]flush_bp_all.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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ARM: tlb: don't perform inner-shareable invalidation for local TLB ops

Inner-shareable TLB invalidation is typically more expensive than local
(non-shareable) invalidation, so performing the broadca

ARM: tlb: don't perform inner-shareable invalidation for local TLB ops

Inner-shareable TLB invalidation is typically more expensive than local
(non-shareable) invalidation, so performing the broadcasting for
local_flush_tlb_* operations is a waste of cycles and needlessly
clobbers entries in the TLBs of other CPUs.

This patch introduces __flush_tlb_* versions for many of the TLB
invalidation functions, which only respect inner-shareable variants of
the invalidation instructions when presented with the TLB_V7_UIS_FULL
flag. The local version is also inlined to prevent SMP_ON_UP kernels
from missing flushes, where the __flush variant would be called with
the UP flags.

This gains us around 0.5% in hackbench scores for a dual-core A15, but I
would expect this to improve as more cores (and clusters) are added to
the equation.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Albin Tonnerre <Albin.Tonnerre@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>

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Merge branch 'kvm-arm64/fixes-3.11-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into kvm-master

Merge tag 'v3.11-rc4' into spi-bitbang

Linux 3.11-rc4

Merge branch 'for-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/jeffm/linux-reiserfs into for_next_testing

Reiserfs locking fixes.

Merge branch 'master' into virtio-next

The next commit gets conflicts because it relies on patches which were
cc:stable and thus had to be merged into Linus' tree before the coming
merge window. So

Merge branch 'master' into virtio-next

The next commit gets conflicts because it relies on patches which were
cc:stable and thus had to be merged into Linus' tree before the coming
merge window. So pull in master now.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

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Merge 3.11-rc4 into usb-next

We want those fixes in here also.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge 3.11-rc4 into tty-next

We want the tty fixes in here as well.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Merge net into net-next to setup some infrastructure Eric
Dumazet needs for usbnet changes.

Signed-off-by: David S. Miller <davem@davem

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

Merge net into net-next to setup some infrastructure Eric
Dumazet needs for usbnet changes.

Signed-off-by: David S. Miller <davem@davemloft.net>

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Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm

Pull ARM fixes from Russell King:
"I've thought long and hard about what to say for this pull request,
and I really can't work ou

Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-arm

Pull ARM fixes from Russell King:
"I've thought long and hard about what to say for this pull request,
and I really can't work out anything sane to say to summarise much of
these commits. The problem is, for most of these are, yet again, lots
of small bits scattered around the place without any real overall
theme to them"

Most notable is probably the kuser page helper improvements.

* 'fixes' of git://git.linaro.org/people/rmk/linux-arm: (22 commits)
ARM: Add .text annotations where required after __CPUINIT removal
ARM: 7803/1: Fix deadlock scenario with smp_send_stop()
ARM: make vectors page inaccessible from userspace
ARM: move signal handlers into a vdso-like page
ARM: allow kuser helpers to be removed from the vector page
ARM: update FIQ support for relocation of vectors
ARM: use linker magic for vectors and vector stubs
ARM: move vector stubs
ARM: poison memory between kuser helpers
ARM: poison the vectors page
ARM: 7801/1: v6: prevent gcc 4.5 from reordering extended CP15 reads above is_smp() test
ARM: 7800/1: ARMv7-M: Fix name of NVIC handler function
ARM: Fix sorting of machine- initializers
ARM: 7791/1: a.out: remove partial a.out support
ARM: 7790/1: Fix deferred mm switch on VIVT processors
ARM: 7789/1: Do not run dummy_flush_tlb_a15_erratum() on non-Cortex-A15
ARM: 7787/1: virt: ensure visibility of __boot_cpu_mode
ARM: 7788/1: elf: fix lpae hwcap feature reporting in proc/cpuinfo
ARM: 7786/1: hyp: fix macro parameterisation
ARM: 7785/1: mm: restrict early_alloc to section-aligned memory
...

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ARM: 7789/1: Do not run dummy_flush_tlb_a15_erratum() on non-Cortex-A15

Commit 93dc688 (ARM: 7684/1: errata: Workaround for Cortex-A15 erratum 798181 (TLBI/DSB operations)) causes the following unde

ARM: 7789/1: Do not run dummy_flush_tlb_a15_erratum() on non-Cortex-A15

Commit 93dc688 (ARM: 7684/1: errata: Workaround for Cortex-A15 erratum 798181 (TLBI/DSB operations)) causes the following undefined instruction error on a mx53 (Cortex-A8):

Internal error: Oops - undefined instruction: 0 [#1] SMP ARM
CPU: 0 PID: 275 Comm: modprobe Not tainted 3.11.0-rc2-next-20130722-00009-g9b0f371 #881
task: df46cc00 ti: df48e000 task.ti: df48e000
PC is at check_and_switch_context+0x17c/0x4d0
LR is at check_and_switch_context+0xdc/0x4d0

This problem happens because check_and_switch_context() calls dummy_flush_tlb_a15_erratum() without checking if we are really running on a Cortex-A15 or not.

To avoid this issue, only call dummy_flush_tlb_a15_erratum() inside
check_and_switch_context() if erratum_a15_798181() returns true, which means that we are really running on a Cortex-A15.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

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Merge commit 'Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux'

This backmerges Linus' merge commit of the latest drm-fixes pull:

commit 549f3a1218ba18fcde11ef0e22b07e6365645

Merge commit 'Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux'

This backmerges Linus' merge commit of the latest drm-fixes pull:

commit 549f3a1218ba18fcde11ef0e22b07e6365645788
Merge: 42577ca 058ca4a
Author: Linus Torvalds <torvalds@linux-foundation.org>
Date: Tue Jul 23 15:47:08 2013 -0700

Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux

We've accrued a few too many conflicts, but the real reason is that I
want to merge the 100% solution for Haswell concurrent registers
writes into drm-intel-next. But that depends upon the 90% bandaid
merged into -fixes:

commit a7cd1b8fea2f341b626b255d9898a5ca5fabbf0a
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Fri Jul 19 20:36:51 2013 +0100

drm/i915: Serialize almost all register access

Also, we can roll up on accrued conflicts.

Usually I'd backmerge a tagged -rc, but I want to get this done before
heading off to vacations next week ;-)

Conflicts:
drivers/gpu/drm/i915/i915_dma.c
drivers/gpu/drm/i915/i915_gem.c

v2: For added hilarity we have a init sequence conflict around the
gt_lock, so need to move that one, too. Spotted by Jani Nikula.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Merge branch 'master' into for-next

Sync with Linus' master to be able to apply
trivial patche to newer code.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>

Merge tag 'v3.11-rc2' into patchwork

Linux 3.11-rc2

* tag 'v3.11-rc2': (9535 commits)
Linux 3.11-rc2
ext3: fix a BUG when opening a file with O_TMPFILE flag
ext4: fix a BUG when opening a fil

Merge tag 'v3.11-rc2' into patchwork

Linux 3.11-rc2

* tag 'v3.11-rc2': (9535 commits)
Linux 3.11-rc2
ext3: fix a BUG when opening a file with O_TMPFILE flag
ext4: fix a BUG when opening a file with O_TMPFILE flag
vfs: constify dentry parameter in d_count()
livelock avoidance in sget()
allow O_TMPFILE to work with O_WRONLY
Btrfs: fix wrong write offset when replacing a device
Btrfs: re-add root to dead root list if we stop dropping it
Btrfs: fix lock leak when resuming snapshot deletion
Btrfs: update drop progress before stopping snapshot dropping
arm64: use common reboot infrastructure
arm64: mm: don't treat user cache maintenance faults as writes
arm64: add '#ifdef CONFIG_COMPAT' for aarch32_break_handler()
arm64: Only enable local interrupts after the CPU is marked online
MIPS: kvm: Kconfig: Drop HAVE_KVM dependency from VIRTUALIZATION
um: remove dead code
um: siginfo cleanup
MIPS: Octeon: Fix DT pruning bug with pip ports
uml: Fix which_tmpdir failure when /dev/shm is a symlink, and in other edge cases
um: Fix wait_stub_done() error handling
...

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Merge branch 'linus' into perf/core

Merge in a v3.11-rc1-ish branch to go from v3.10 based development
to a v3.11 based one.

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge tag 'omap-for-v3.11/fixes-for-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

Omap fixes and minor defconfig updates that would be good to
get in be

Merge tag 'omap-for-v3.11/fixes-for-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes

Omap fixes and minor defconfig updates that would be good to
get in before -rc1.

* tag 'omap-for-v3.11/fixes-for-merge-window' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
ARM: OMAP2+: omap2plus_defconfig: Enable appended DTB support
ARM: OMAP2+: Enable TI_EDMA in omap2plus_defconfig
ARM: OMAP2+: omap2plus_defconfig: enable DRA752 thermal support by default
ARM: OMAP2+: omap2plus_defconfig: enable TI bandgap driver
ARM: OMAP2+: devices: remove duplicated include from devices.c
ARM: OMAP3: igep0020: Set DSS pins in correct mux mode.
ARM: OMAP2+: N900: enable N900-specific drivers even if device tree is enabled
ARM: OMAP2+: Cocci spatch "ptr_ret.spatch"
ARM: OMAP2+: Remove obsolete Makefile line
ARM: OMAP5: Enable Cortex A15 errata 798181
ARM: scu: provide inline dummy functions when SCU is not present
ARM: OMAP4: sleep: build OMAP4 specific functions only for OMAP4
ARM: OMAP2+: timer: initialize before using oh_name

Signed-off-by: Olof Johansson <olof@lixom.net>

Add/move/change conflicts in arch/arm/mach-omap2/Kconfig resolved.

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Merge branch 'linus' into timers/urgent

Get upstream changes so we can apply fixes against them

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

Pull ARM updates from Russell King:
"This contains the usual updates from other people (listed below) and
the usual random mu

Merge branch 'for-linus' of git://git.linaro.org/people/rmk/linux-arm

Pull ARM updates from Russell King:
"This contains the usual updates from other people (listed below) and
the usual random muddle of miscellaneous ARM updates which cover some
low priority bug fixes and performance improvements.

I've started to put the pull request wording into the merge commits,
which are:

- NoMMU stuff:

This includes the following series sent earlier to the list:
- nommu-fixes
- R7 Support
- MPU support

I've left out the ARCH_MULTIPLATFORM/!MMU stuff that Arnd and I
were discussing today until we've reached a conclusion/that's had
some more review.

This is rebased (and re-tested) on your devel-stable branch because
otherwise there were going to be conflicts with Uwe's V7M work now
that you've merged that. I've included the fix for limiting MPU to
CPU_V7.

- Huge page support

These changes bring both HugeTLB support and Transparent HugePage
(THP) support to ARM. Only long descriptors (LPAE) are supported
in this series.

The code has been tested on an Arndale board (Exynos 5250).

- LPAE updates

Please pull these miscellaneous LPAE fixes I've been collecting for
a while now for 3.11. They've been tested and reviewed by quite a
few people, and most of the patches are pretty trivial. -- Will Deacon.

- arch_timer cleanups

Please pull these arch_timer cleanups I've been holding onto for a
while. They're the same as my last posting, but have been rebased
to v3.10-rc3.

- mpidr linearisation (multiprocessor id register - identifies which
CPU number we are in the system)

This patch series that implements MPIDR linearization through a
simple hashing algorithm and updates current cpu_{suspend}/{resume}
code to use the newly created hash structures to retrieve context
pointers. It represents a stepping stone for the implementation of
power management code on forthcoming multi-cluster ARM systems.

It has been tested on TC2 (dual cluster A15xA7 system), iMX6q,
OMAP4 and Tegra, with processors hitting low-power states requiring
warm-boot resume through the cpu_resume code path"

* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm: (77 commits)
ARM: 7775/1: mm: Remove do_sect_fault from LPAE code
ARM: 7777/1: Avoid extra calls to the C compiler
ARM: 7774/1: Fix dtb dependency to use order-only prerequisites
ARM: 7770/1: remove residual ARMv2 support from decompressor
ARM: 7769/1: Cortex-A15: fix erratum 798181 implementation
ARM: 7768/1: prevent risks of out-of-bound access in ASID allocator
ARM: 7767/1: let the ASID allocator handle suspended animation
ARM: 7766/1: versatile: don't mark pen as __INIT
ARM: 7765/1: perf: Record the user-mode PC in the call chain.
ARM: 7735/2: Preserve the user r/w register TPIDRURW on context switch and fork
ARM: kernel: implement stack pointer save array through MPIDR hashing
ARM: kernel: build MPIDR hash function data structure
ARM: mpu: Ensure that MPU depends on CPU_V7
ARM: mpu: protect the vectors page with an MPU region
ARM: mpu: Allow enabling of the MPU via kconfig
ARM: 7758/1: introduce config HAS_BANDGAP
ARM: 7757/1: mm: don't flush icache in switch_mm with hardware broadcasting
ARM: 7751/1: zImage: don't overwrite ourself with a page table
ARM: 7749/1: spinlock: retry trylock operation if strex fails on free lock
ARM: 7748/1: oabi: handle faults when loading swi instruction from userspace
...

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Merge branch 'next' into for-linus

Prepare first set of updates for 3.11 merge window.

Merge branch 'devel-stable' into for-next

Conflicts:
arch/arm/Makefile
arch/arm/include/asm/glue-proc.h

Merge branch 'for-next' of git://github.com/rydberg/linux into next

Pull in changes from Henrik: "a trivial MT documentation fix".

Merge branch 'for-rmk/hugepages' of git://git.linaro.org/people/stevecapper/linux into devel-stable

These changes bring both HugeTLB support and Transparent HugePage
(THP) support to ARM. Only long

Merge branch 'for-rmk/hugepages' of git://git.linaro.org/people/stevecapper/linux into devel-stable

These changes bring both HugeTLB support and Transparent HugePage
(THP) support to ARM. Only long descriptors (LPAE) are supported
in this series.

The code has been tested on an Arndale board (Exynos 5250).

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Merge branch 'ja-nommu-for-rmk-v2' of git://linux-arm.org/linux-ja into devel-stable

This includes the following series sent earlier to the list:
- nommu-fixes
- R7 Support
- MPU support

I've le

Merge branch 'ja-nommu-for-rmk-v2' of git://linux-arm.org/linux-ja into devel-stable

This includes the following series sent earlier to the list:
- nommu-fixes
- R7 Support
- MPU support

I've left out the ARCH_MULTIPLATFORM/!MMU stuff that Arnd and I were
discussing today until we've reached a conclusion/that's had some more
review.

This is rebased (and re-tested) on your devel-stable branch because
otherwise there were going to be conflicts with Uwe's V7M work now that
you've merged that. I've included the fix for limiting MPU to CPU_V7.

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ARM: nommu: add stub local_flush_bp_all() for !CONFIG_MMUU

Since the merging of Will's tlb-ops branch, specifically 89c7e4b8bbb3
(ARM: 7661/1: mm: perform explicit branch predictor maintenance when

ARM: nommu: add stub local_flush_bp_all() for !CONFIG_MMUU

Since the merging of Will's tlb-ops branch, specifically 89c7e4b8bbb3
(ARM: 7661/1: mm: perform explicit branch predictor maintenance when required),
building SMP without CONFIG_MMU has been broken.

The local_flush_bp_all function is only called for operations related to
changing the kernel's view of memory and ASID rollover - both of which are
irrelevant to an !MMU kernel.

This patch adds a stub local_flush_bp_all() function to the other tlb
maintenance stubs and restores the ability to build an SMP !MMU kernel.

Signed-off-by: Jonathan Austin <jonathan.austin@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>

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