Pull x86 fixes from Ingo Molnar:
 "Misc fixes: two KASAN fixes, two EFI boot fixes, two boot-delay
  optimization fixes, and a fix for a IRQ handling hang observed on
  virtual platforms"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/mm, kasan: Silence KASAN warnings in get_wchan()
  compiler, atomics, kasan: Provide READ_ONCE_NOCHECK()
  x86, kasan: Fix build failure on KASAN=y && KMEMCHECK=y kernels
  x86/smpboot: Fix CPU #1 boot timeout
  x86/smpboot: Fix cpu_init_udelay=10000 corner case boot parameter misbehavior
  x86/ioapic: Disable interrupts when re-routing legacy IRQs
  x86/setup: Extend low identity map to cover whole kernel range
  x86/efi: Fix multiple GOP device support

Pull powerpc fixes from Michael Ellerman:

 - Revert "Use the POWER8 Micro Partition Prefetch Engine in KVM HV on
   POWER8" from Paul
 - Handle irq_happened flag correctly in off-line loop from Paul
 - Validate rtas.entry before calling enter_rtas() from Vasant

* tag 'powerpc-4.3-5' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/rtas: Validate rtas.entry before calling enter_rtas()
  powerpc/powernv: Handle irq_happened flag correctly in off-line loop
  powerpc: Revert "Use the POWER8 Micro Partition Prefetch Engine in KVM HV on POWER8"

Pull ARM SoC fixes from Arnd Bergmann:
 "Most of the changes this time are for incorrect device nodes in
  various ways, on on imx, berlin, exynos, ux500, uniphier, omap and
  meson.

  Chen-Yu Tsai now co-maintains mach-sunxi (Allwinner).

  Other bug fixes include
   - a partial revert of a broken tegra gpio patch
   - irq affinity for arm ccn
   - suspend on one Armada 385 machine
   - enable ZONE_DMA to avoid an OMAP crash for over 2GB RAM
   - turning on a regulator on beagleboard-x15 for HDMI
   - making the omap gpmc debug code visible
   - setup of orion network switch
   - a rare build regression for pxa"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (22 commits)
  ARM: OMAP2+: Fix imprecise external abort caused by bogus SRAM init
  thermal: exynos: Fix register read in TMU
  ARM: OMAP2+: Fix oops with LPAE and more than 2GB of memory
  ARM: tegra: Comment out gpio-ranges properties
  ARM: dts: uniphier: fix IRQ number for devices on PH1-LD6b ref board
  drivers/perf: arm_pmu: avoid CPU device_node reference leak
  bus: arm-ccn: Fix irq affinity setting on CPU migration
  bus: arm-ccn: Handle correctly no-more-cpus case
  ARM: mvebu: correct a385-db-ap compatible string
  ARM: meson6: DTS: Fix wrong reg mapping and IRQ numbers
  MAINTAINERS: Update Allwinner entry and add new maintainer
  ARM: ux500: modify initial levelshifter status
  ARM: pxa: fix pxa3xx DFI lockup hack
  Documentation: ARM: List new omap MMC requirements
  memory: omap-gpmc: dump "before" state before first modification
  memory: omap-gpmc: Fix unselectable debug option for GPMC
  ARM: dts: am57xx-beagle-x15: set VDD_SD to always-on
  ARM: dts: Fix audio card detection on Peach boards
  ARM: EXYNOS: Fix double of_node_put() when parsing child power domains
  ARM: orion: Fix DSA platform device after mvmdio conversion
  ...

Pull KVM bugfixes from Paolo Bonzini:
 "Bug fixes for ARM, mostly 4.3 regressions related to virtual interrupt
  controller changes"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  arm/arm64: KVM: Fix disabled distributor operation
  arm/arm64: KVM: Clear map->active on pend/active clear
  arm/arm64: KVM: Fix arch timer behavior for disabled interrupts
  KVM: arm: use GIC support unconditionally
  KVM: arm/arm64: Fix memory leak if timer initialization fails
  KVM: arm/arm64: Do not inject spurious interrupts

Currently we do not validate rtas.entry before calling enter_rtas(). This
leads to a kernel oops when user space calls rtas system call on a powernv
platform (see below). This patch adds code to validate rtas.entry before
making enter_rtas() call.

  Oops: Exception in kernel mode, sig: 4 [#1]
  SMP NR_CPUS=1024 NUMA PowerNV
  task: c000000004294b80 ti: c0000007e1a78000 task.ti: c0000007e1a78000
  NIP: 0000000000000000 LR: 0000000000009c14 CTR: c000000000423140
  REGS: c0000007e1a7b920 TRAP: 0e40   Not tainted  (3.18.17-340.el7_1.pkvm3_1_0.2400.1.ppc64le)
  MSR: 1000000000081000 <HV,ME>  CR: 00000000  XER: 00000000
  CFAR: c000000000009c0c SOFTE: 0
  NIP [0000000000000000]           (null)
  LR [0000000000009c14] 0x9c14
  Call Trace:
  [c0000007e1a7bba0] [c00000000041a7f4] avc_has_perm_noaudit+0x54/0x110 (unreliable)
  [c0000007e1a7bd80] [c00000000002ddc0] ppc_rtas+0x150/0x2d0
  [c0000007e1a7be30] [c000000000009358] syscall_exit+0x0/0x98

Cc: stable@vger.kernel.org # v3.2+
Fixes: 55190f88789a ("powerpc: Add skeleton PowerNV platform")
Reported-by: NAGESWARA R. SASTRY <nasastry@in.ibm.com>
Signed-off-by: Vasant Hegde <hegdevasant@linux.vnet.ibm.com>
[mpe: Reword change log, trim oops, and add stable + fixes]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

A late round of KVM/ARM fixes for v4.3-rc7, fixing:
 - A bug where level-triggered interrupts lowered from userspace
   are still routed to the guest
 - A memory leak an a failed initialization path
 - A build error under certain configurations
 - Several timer bugs introduced with moving the timer to the active
   state handling instead of the masking trick.

Merge "mvebu fixes for 4.3 (part 2)" from Gregory CLEMENT:

Fix wrong compatible for A385 DB AP preventing using suspend

* tag 'mvebu-fixes-4.3-2' of git://git.infradead.org/linux-mvebu:
  ARM: mvebu: correct a385-db-ap compatible string

Merge "Samsung 2nd fixes for v4.3" from Kukjin Kim:

- fix SOC detection of exynos thermal on exynos5260
- fix audio card detection on Peach boards
- fix double of_node_put() when parsing child power domains

* tag 'samsung-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung:
  thermal: exynos: Fix register read in TMU
  ARM: dts: Fix audio card detection on Peach boards
  ARM: EXYNOS: Fix double of_node_put() when parsing child power domains

Merge "Fixes for omaps for v4.3-rc cycle" from Tony Lindgren:

- Fix oops with LPAE and moew than 2GB of memory by enabling
  ZONE_DMA for LPAE. Probably no need for stable on this one as we
  only recently ran into this with the mainline kernel

- Fix imprecise external abort caused by bogus SRAM init. This affects
  dm814x recently merged, so no need for stable on this one AFAIK

* tag 'omap-for-v4.3/fixes-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap:
  ARM: OMAP2+: Fix imprecise external abort caused by bogus SRAM init
  ARM: OMAP2+: Fix oops with LPAE and more than 2GB of memory

This fixes a bug where it is possible for an off-line CPU to fail to go
into a low-power state (nap/sleep/winkle), and to become unresponsive to
requests from the KVM subsystem to wake up and run a VCPU. What can
happen is that a maskable interrupt of some kind (external, decrementer,
hypervisor doorbell, or HMI) after we have called local_irq_disable() at
the beginning of pnv_smp_cpu_kill_self() and before interrupts are
hard-disabled inside power7_nap/sleep/winkle(). In this situation, the
pending event is marked in the irq_happened flag in the PACA. This
pending event prevents power7_nap/sleep/winkle from going to the
requested low-power state; instead they return immediately. We don't
deal with any of these pending event flags in the off-line loop in
pnv_smp_cpu_kill_self() because power7_nap et al. return 0 in this case,
so we will have srr1 == 0, and none of the processing to clear
interrupts or doorbells will be done.

Usually, the most obvious symptom of this is that a KVM guest will fail
with a console message saying "KVM: couldn't grab cpu N".

This fixes the problem by making sure we handle the irq_happened flags
properly. First, we hard-disable before the off-line loop. Once we have
hard-disabled, the irq_happened flags can't change underneath us. We
unconditionally clear the DEC and HMI flags: there is no processing of
timer interrupts while off-line, and the necessary HMI processing is all
done in lower-level code. We leave the EE and DBELL flags alone for the
first iteration of the loop, so that we won't fail to respond to a
split-core request that came in just before hard-disabling. Within the
loop, we handle external interrupts if the EE bit is set in irq_happened
as well as if the low-power state was interrupted by an external
interrupt. (We don't need to do the msgclr for a pending doorbell in
irq_happened, because doorbells are edge-triggered and don't remain
pending in hardware.) Then we clear both the EE and DBELL flags, and
once clear, they cannot be set again (until this CPU comes online again,
that is).

This also fixes the debug check to not be done when we just ran a KVM
guest or when the sleep didn't happen because of a pending event in
irq_happened.

Signed-off-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>