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Larry Bassel eb631bb5bf arm64: Support arch_irq_work_raise() via self IPIs 
Support for arch_irq_work_raise() was missing from
arm64 (a prerequisite for FULL_NOHZ).

This patch is based on the arm32 patch ARM 7872/1.

commit bf18525fd7
Author: Stephen Boyd <sboyd@codeaurora.org>
Date:   Tue Oct 29 20:32:56 2013 +0100

    ARM: 7872/1: Support arch_irq_work_raise() via self IPIs

    By default, IRQ work is run from the tick interrupt (see
    irq_work_run() in update_process_times()). When we're in full
    NOHZ mode, restarting the tick requires the use of IRQ work and
    if the only place we run IRQ work is in the tick interrupt we
    have an unbreakable cycle. Implement arch_irq_work_raise() via
    self IPIs to break this cycle and get the tick started again.
    Note that we implement this via IPIs which are only available on
    SMP builds. This shouldn't be a problem because full NOHZ is only
    supported on SMP builds anyway.

    Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
    Reviewed-by: Kevin Hilman <khilman@linaro.org>
    Cc: Frederic Weisbecker <fweisbec@gmail.com>
    Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Signed-off-by: Larry Bassel <larry.bassel@linaro.org>
Reviewed-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2014-05-16 17:42:21 +01:00
..
boot arm64: Mark the Applied Micro X-Gene SATA controller as DMA coherent 2014-05-03 22:20:35 +01:00
configs arm64: defconfig: Expand default enabled features 2014-02-07 17:17:28 +00:00
crypto arm64/crypto: AES-ECB/CBC/CTR/XTS using ARMv8 NEON and Crypto Extensions 2014-05-14 10:04:16 -07:00
include arm64: Support arch_irq_work_raise() via self IPIs 2014-05-16 17:42:21 +01:00
kernel arm64: Support arch_irq_work_raise() via self IPIs 2014-05-16 17:42:21 +01:00
kvm arm64: kvm: use inner-shareable barriers for inner-shareable maintenance 2014-05-09 17:04:24 +01:00
lib arm64: atomics: fix use of acquire + release for full barrier semantics 2014-02-07 16:45:43 +00:00
mm Revert "arm64: Introduce execute-only page access permissions" 2014-05-16 16:44:32 +01:00
xen xen/arm,arm64: enable SWIOTLB_XEN 2013-10-10 13:40:44 +00:00
Kconfig 2014-05-15 for-3.16 pull request 2014-05-16 10:05:11 +01:00
Kconfig.debug arm64: Add missing Kconfig for CONFIG_STRICT_DEVMEM 2014-04-07 17:33:13 +01:00
Makefile arm64/crypto: SHA-1 using ARMv8 Crypto Extensions 2014-05-14 10:03:17 -07:00