linux-toradex.git/arch/arm, branch v4.9.15

arm/arm64: KVM: Enforce unconditional flush to PoC when mapping to stage-2

2017-03-12T05:41:47+00:00

commit 8f36ebaf21fdae99c091c67e8b6fab33969f2667 upstream.

When we fault in a page, we flush it to the PoC (Point of Coherency)
if the faulting vcpu has its own caches off, so that it can observe
the page we just brought it.

But if the vcpu has its caches on, we skip that step. Bad things
happen when *another* vcpu tries to access that page with its own
caches disabled. At that point, there is no garantee that the
data has made it to the PoC, and we access stale data.

The obvious fix is to always flush to PoC when a page is faulted
in, no matter what the state of the vcpu is.

Fixes: 2d58b733c876 ("arm64: KVM: force cache clean on page fault when caches are off")
Reviewed-by: Christoffer Dall 
Signed-off-by: Marc Zyngier 
Signed-off-by: Greg Kroah-Hartman

ARM: dts: at91: Enable DMA on sama5d2_xplained console

2017-03-12T05:41:41+00:00

commit 78162d48466d23c45a784034630c5928af631e3d upstream.

Enable DMA on uart1 to get a more reliable console.

Acked-by: Nicolas Ferre 
Signed-off-by: Alexandre Belloni 
Signed-off-by: Greg Kroah-Hartman

ARM: dts: at91: Enable DMA on sama5d4_xplained console

2017-03-12T05:41:41+00:00

commit ef8d02d4a2c36f7a93e74c95a9c419353b310117 upstream.

Enable DMA on usart3 to get a more reliable console. This is especially
useful for automation and kernelci were a kernel with PROVE_LOCKING enabled
is quite susceptible to character loss, resulting in tests failure.

Acked-by: Nicolas Ferre 
Signed-off-by: Alexandre Belloni 
Signed-off-by: Greg Kroah-Hartman

ARM: 8658/1: uaccess: fix zeroing of 64-bit get_user()

2017-02-23T16:44:36+00:00

commit 9e3440481845b2ec22508f60837ee2cab2b6054f upstream.

The 64-bit get_user() wasn't clearing the high word due to a typo in the
error handler. The exception handler entry was already correct, though.
Noticed during recent usercopy test additions in lib/test_user_copy.c.

Signed-off-by: Kees Cook 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: 8642/1: LPAE: catch pending imprecise abort on unmask

2017-02-14T23:25:37+00:00

commit 97a98ae5b8acf08d07d972c087b2def060bc9b73 upstream.

Asynchronous external abort is coded differently in DFSR with LPAE enabled.

Fixes: 9254970c "ARM: 8447/1: catch pending imprecise abort on unmask".
Signed-off-by: Alexander Sverdlin 
Cc: Russell King 
Cc: Andrew Morton 
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: dts: imx6dl: fix GPIO4 range

2017-02-14T23:25:37+00:00

commit 7f59b319111bbc3a5f32730c8a43b201e9522f52 upstream.

GPIO4_11 is on pin 152(MX6DL_PAD_KEY_ROW2) and not on pin
151(MX6DL_PAD_KEY_ROW1).

I found the error while booting a mainline kernel on APF6S SoM and
noticed the following message:

[    2.609337] imx6dl-pinctrl 20e0000.iomuxc: pin MX6DL_PAD_KEY_ROW1
already requested by 20a8000.gpio:105; cannot claim for 20a8000.gpio:107
[    2.621884] imx6dl-pinctrl 20e0000.iomuxc: pin-151 (20a8000.gpio:107)
status -22
[    2.629303] spi_imx 2008000.ecspi: Can't get CS GPIO 107

With this patch, the message is gone and spi_imx driver probes correctly.

Fixes: bb728d662bed ("ARM: dts: add gpio-ranges property to iMX GPIO controllers")
Signed-off-by: Sébastien Szymanski 
Signed-off-by: Shawn Guo 
Signed-off-by: Greg Kroah-Hartman

ARM: 8643/3: arm/ptrace: Preserve previous registers for short regset write

2017-02-14T23:25:35+00:00

commit 228dbbfb5d77f8e047b2a1d78da14b7158433027 upstream.

Ensure that if userspace supplies insufficient data to
PTRACE_SETREGSET to fill all the registers, the thread's old
registers are preserved.

Fixes: 5be6f62b0059 ("ARM: 6883/1: ptrace: Migrate to regsets framework")
Signed-off-by: Dave Martin 
Acked-by: Russell King 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: 8613/1: Fix the uaccess crash on PB11MPCore

2017-01-26T07:24:43+00:00

commit 90f92c631b210c1e97080b53a9d863783281a932 upstream.

The following patch was sketched by Russell in response to my
crashes on the PB11MPCore after the patch for software-based
priviledged no access support for ARMv8.1. See this thread:
http://marc.info/?l=linux-arm-kernel&m=144051749807214&w=2

I am unsure what is going on, I suspect everyone involved in
the discussion is. I just want to repost this to get the
discussion restarted, as I still have to apply this patch
with every kernel iteration to get my PB11MPCore Realview
running.

Testing by Neil Armstrong on the Oxnas NAS has revealed that
this bug exist also on that widely deployed hardware, so
we are probably currently regressing all ARM11MPCore systems.

Cc: Russell King 
Cc: Will Deacon 
Fixes: a5e090acbf54 ("ARM: software-based priviledged-no-access support")
Tested-by: Neil Armstrong 
Signed-off-by: Linus Walleij 
Signed-off-by: Russell King 
Signed-off-by: Greg Kroah-Hartman

ARM: ux500: fix prcmu_is_cpu_in_wfi() calculation

2017-01-26T07:24:43+00:00

commit f0e8faa7a5e894b0fc99d24be1b18685a92ea466 upstream.

This function clearly never worked and always returns true,
as pointed out by gcc-7:

arch/arm/mach-ux500/pm.c: In function 'prcmu_is_cpu_in_wfi':
arch/arm/mach-ux500/pm.c:137:212: error: ?:
using integer constants in boolean context, the expression
will always evaluate to 'true' [-Werror=int-in-bool-context]

With the added braces, the condition actually makes sense.

Fixes: 34fe6f107eab ("mfd : Check if the other db8500 core is in WFI")
Signed-off-by: Arnd Bergmann 
Acked-by: Daniel Lezcano 
Signed-off-by: Linus Walleij 
Signed-off-by: Greg Kroah-Hartman

ARM: dts: omap3: Fix Card Detect and Write Protect on Logic PD SOM-LV

2017-01-26T07:24:43+00:00

commit 1ea6af3216b092ec97129ac81bd95cf254c4b140 upstream.

This fixes commit ab8dd3aed011 ("ARM: DTS: Add minimal Support for
Logic PD DM3730 SOM-LV") where the Card Detect and Write Protect
pins were improperly configured.

Fixes: ab8dd3aed011 ("ARM: DTS: Add minimal Support for Logic PD DM3730 SOM-LV")
Signed-off-by: Adam Ford 
Signed-off-by: Tony Lindgren 
Signed-off-by: Greg Kroah-Hartman