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  1. 01 8月, 2013 1 次提交
    • R
      ARM: move vector stubs · 19accfd3
      由 Russell King 提交于 
      Move the machine vector stubs into the page above the vector page,
which we can prevent from being visible to userspace.  Also move
the reset stub, and place the swi vector at a location that the
'ldr' can get to it.

This hides pointers into the kernel which could give valuable
information to attackers, and reduces the number of exploitable
instructions at a fixed address.

Cc: <stable@vger.kernel.org>
Acked-by: NNicolas Pitre <nico@linaro.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      19accfd3
  3. 10 7月, 2013 2 次提交
  5. 27 6月, 2013 1 次提交
  7. 26 6月, 2013 1 次提交
  9. 25 6月, 2013 1 次提交
    • S
      ARM: msm: Migrate to common clock framework · 8cc7f533
      由 Stephen Boyd 提交于 
      Move the existing clock code in mach-msm to the common clock
framework. We lose our capability to set the rate of and enable a
clock through debugfs. This is ok though because the debugfs
features are mainly used for testing and development of new clock
code.

To maintain compatibility with the original MSM clock code we
make a wrapper for clk_reset() that calls the struct msm_clk
specific reset function. This is necessary for the usb and sdcc
devices on MSM until a better suited API is made available.

Cc: Saravana Kannan <skannan@codeaurora.org>
Acked-by: NMike Turquette <mturquette@linaro.org>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NDavid Brown <davidb@codeaurora.org>
      8cc7f533
  11. 24 6月, 2013 2 次提交
    • A
      ARM: multiplatform: always pick one CPU type · 24e860fb
      由 Arnd Bergmann 提交于 
      With the new default platform code, we can always boot using DT
without requiring a board file, but we cannot build a kernel
unless we select at least one CPU core, which breaks some
"randconfig" builds.

This adapts the ARCH_MULTI_V4T and ARCH_MULTI_V5 options so we
always default to a common CPU core if no platform was enabled
that picks something else. The default we pick for ARMv4T is
ARM920T, while for ARMv5 we pick ARM926T.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
      24e860fb
    • G
      ARM: 7773/1: PJ4B: Add support for errata 4742 · 3e0a07f8
      由 Gregory CLEMENT 提交于 
      This commit fixes the regression on Armada 370 (the kernal hang during
boot) introduced by the commit: "ARM: 7691/1: mm: kill unused
TLB_CAN_READ_FROM_L1_CACHE and use ALT_SMP instead".

When coming out of either a Wait for Interrupt (WFI) or a Wait for
Event (WFE) IDLE states, a specific timing sensitivity exists between
the retiring WFI/WFE instructions and the newly issued subsequent
instructions. This sensitivity can result in a CPU hang scenario.  The
workaround is to insert either a Data Synchronization Barrier (DSB) or
Data Memory Barrier (DMB) command immediately after the WFI/WFE
instruction.

This commit was based on the work of Lior Amsalem, but heavily
modified to apply the errata fix dynamically according to the
processor type thanks to the suggestions of Russell King and Nicolas
Pitre.
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Reviewed-by: NWill Deacon <will.deacon@arm.com>
Acked-by: NNicolas Pitre <nico@linaro.org>
Tested-by: NWilly Tarreau <w@1wt.eu>
Cc: <stable@vger.kernel.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      3e0a07f8
  13. 22 6月, 2013 1 次提交
  15. 21 6月, 2013 1 次提交
  17. 19 6月, 2013 5 次提交
  19. 18 6月, 2013 3 次提交
    • M
      ARM: davinci: move private EDMA API to arm/common · 3ad7a42d
      由 Matt Porter 提交于 
      Move mach-davinci/dma.c to common/edma.c so it can be used
by OMAP (specifically AM33xx) as well.
Signed-off-by: NMatt Porter <mporter@ti.com>
Acked-by: Chris Ball <cjb@laptop.org> # davinci_mmc.c
Acked-by: NMark Brown <broonie@linaro.org>
Acked-by: NOlof Johansson <olof@lixom.net>
[nsekhar@ti.com: dropped davinci sffsdr changes]
Signed-off-by: NSekhar Nori <nsekhar@ti.com>
      3ad7a42d
    • S
      ARM: keystone: Add minimal TI Keystone platform support · 828989ad
      由 Santosh Shilimkar 提交于 
      Texas Instruments Keystone family of multi-core devices are
based on ARM Cortex A15. Patch adds basic definitions for a
new Keystone sub-architecture in ARM.

The TCI66xxK2H Communications Infrastructure Keystone SoCs
are member of the C66x family based on TI's new KeyStone 2
multi-core SoC Architecture designed specifically for high
performance wireless and networking infrastructure applications.
The SOCs contains many subsystems like Cortex A15 ARM CorePacs,
C66XX DSP CorePacs, MSMC memory controller, Tera Net bus,
IP Network, Navigator, Hyperlink, 1G/10G Ethernet, Radio layers
and queue based communication systems.

Cc: Arnd Bergmann <arnd@arndb.de>
Cc: arm@kernel.org
Acked-by: NOlof Johansson <olof@lixom.net>
Signed-off-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>
      828989ad
    • S
      ARM: 7759/1: decouple CPU offlining from reboot/shutdown · 19ab428f
      由 Stephen Warren 提交于 
      Add comments to machine_shutdown()/halt()/power_off()/restart() that
describe their purpose and/or requirements re: CPUs being active/not.

In machine_shutdown(), replace the call to smp_send_stop() with a call to
disable_nonboot_cpus(). This completely disables all but one CPU, thus
satisfying the requirement that only a single CPU be active for kexec.
Adjust Kconfig dependencies for this change.

In machine_halt()/power_off()/restart(), call smp_send_stop() directly,
rather than via machine_shutdown(); these functions don't need to
completely de-activate all CPUs using hotplug, but rather just quiesce
them.

Remove smp_kill_cpus(), and its call from smp_send_stop().
smp_kill_cpus() was indirectly calling smp_ops.cpu_kill() without calling
smp_ops.cpu_die() on the target CPUs first. At least some implementations
of smp_ops had issues with this; it caused cpu_kill() to hang on Tegra,
for example. Since smp_send_stop() is only used for shutdown, halt, and
power-off, there is no need to attempt any kind of CPU hotplug here.

Adjust Kconfig to reflect that machine_shutdown() (and hence kexec)
relies upon disable_nonboot_cpus(). However, this alone doesn't guarantee
that hotplug will work, or even that hotplug is implemented for a
particular piece of HW that a multi-platform zImage runs on. Hence, add
error-checking to machine_kexec() to determine whether it did work.
Suggested-by: NRussell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NStephen Warren <swarren@nvidia.com>
Acked-by: NWill Deacon <will.deacon@arm.com>
Tested-by: NZhangfei Gao <zhangfei.gao@gmail.com>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      19ab428f
  21. 17 6月, 2013 6 次提交
  23. 15 6月, 2013 2 次提交
  25. 13 6月, 2013 1 次提交
  27. 12 6月, 2013 3 次提交
  29. 05 6月, 2013 1 次提交
  31. 04 6月, 2013 3 次提交
  33. 31 5月, 2013 1 次提交
    • L
      ARM: u300: device tree support for the timer · 5a5056cc
      由 Linus Walleij 提交于 
      This adds device tree support for the U300 timer, by making
the memory base offset and IRQ dynamically assigned, then
optionally looking them up from the device tree.

Since the timer needs to be registered before any platform
devices are created, we will go into the device tree and look
up the "/timer@c0014000" node and read our base address and
IRQ from there.
Signed-off-by: NLinus Walleij <linus.walleij@linaro.org>
      5a5056cc
  35. 30 5月, 2013 1 次提交
  37. 20 5月, 2013 1 次提交
  39. 07 5月, 2013 1 次提交
  41. 04 5月, 2013 1 次提交
  43. 30 4月, 2013 1 次提交
    • A
      ARM: default machine descriptor for multiplatform · 883a106b
      由 Arnd Bergmann 提交于 
      Since we now have default implementations for init_time and init_irq,
the init_machine callback is the only one that is not yet optional,
but since simple DT based platforms all have the same
of_platform_populate function call in there, we can consolidate them
as well, and then actually boot with a completely empty machine_desc.
Unofortunately we cannot just default to an empty init_machine: We
cannot call of_platform_populate before init_machine because that
does not work in case of auxdata, and we cannot call it after
init_machine either because the machine might need to run code
after adding the devices.

To take the final step, this adds support for booting without defining
any machine_desc whatsoever.

For the case that CONFIG_MULTIPLATFORM is enabled, it adds a
global machine descriptor that never matches any machine but is
used as a fallback if nothing else matches. We assume that without
CONFIG_MULTIPLATFORM, we only want to boot on the systems that the kernel
is built for, so we still retain the build-time warning for missing
machine descriptors and the run-time warning when the platform does not
match in that case.

In the case that we run on a multiplatform kernel and the machine
provides a fully populated device tree, we attempt to keep booting,
hoping that no machine specific callbacks are necessary.

Finally, this also removes the misguided "select ARCH_VEXPRESS" that
was only added to avoid a build error for allnoconfig kernels.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NOlof Johansson <olof@lixom.net>
Cc: "Russell King - ARM Linux" <linux@arm.linux.org.uk>
Cc: Rob Herring <robherring2@gmail.com>
      883a106b