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 <christoffer.dall@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

commit 78162d48466d23c45a784034630c5928af631e3d upstream.

Enable DMA on uart1 to get a more reliable console.

Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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 <nicolas.ferre@atmel.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Pull ARM SoC fixes from Arnd Bergmann:
 "Two more bugfixes that came in during this week:

   - a defconfig change to enable a vital driver used on some Qualcomm
     based phones. This was already queued for 4.11, but the maintainer
     asked to have it in 4.10 after all.

   - a regression fix for the reset controller framework, this got
     broken by a typo in the 4.10 merge window"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  ARM: multi_v7_defconfig: enable Qualcomm RPMCC
  reset: fix shared reset triggered_count decrement on error

Pull ARM fixes from Russell King:
 "A couple of fixes from Kees concerning problems he spotted with our
  user access support"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8658/1: uaccess: fix zeroing of 64-bit get_user()
  ARM: 8657/1: uaccess: consistently check object sizes

This patch enables the Qualcomm RPM based Clock Controller present on
A-family boards.

Signed-off-by: Andy Gross <andy.gross@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

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 <keescook@chromium.org>
Cc: stable@vger.kernel.org
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

In commit 76624175dcae ("arm64: uaccess: consistently check object sizes"),
the object size checks are moved outside the access_ok() so that bad
destinations are detected before hitting the "memset(dest, 0, size)" in the
copy_from_user() failure path.

This makes the same change for arm, with attention given to possibly
extracting the uaccess routines into a common header file for all
architectures in the future.

Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>

Pull ARM fixes from Russell King:
 "A couple more fixes for 4.10:

   - fix addressing the short regset write issue (Dave Martin)

   - fix for LPAE systems which leave a pending imprecise data abort
     before entering the kernel (Alexander Sverdlin)"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8643/3: arm/ptrace: Preserve previous registers for short regset write
  ARM: 8642/1: LPAE: catch pending imprecise abort on unmask

The symbols can no longer be used as loadable modules, leading to a harmless Kconfig
warning:

arch/arm/configs/imote2_defconfig:60:warning: symbol value 'm' invalid for NF_CT_PROTO_UDPLITE
arch/arm/configs/imote2_defconfig:59:warning: symbol value 'm' invalid for NF_CT_PROTO_SCTP
arch/arm/configs/ezx_defconfig:68:warning: symbol value 'm' invalid for NF_CT_PROTO_UDPLITE
arch/arm/configs/ezx_defconfig:67:warning: symbol value 'm' invalid for NF_CT_PROTO_SCTP

Let's make them built-in.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>