powerpc/powernv: Implement NMI IPI with OPAL_SIGNAL_SYSTEM_RESET

This allows MSR[EE]=0 lockups to be detected on an OPAL (bare metal)
system similarly to the hcall NMI IPI on pseries guests, when th

powerpc/powernv: Implement NMI IPI with OPAL_SIGNAL_SYSTEM_RESET

This allows MSR[EE]=0 lockups to be detected on an OPAL (bare metal)
system similarly to the hcall NMI IPI on pseries guests, when the
platform/firmware supports it.

This is an example of CPU10 spinning with interrupts hard disabled:

Watchdog CPU:32 detected Hard LOCKUP other CPUS:10
Watchdog CPU:10 Hard LOCKUP
CPU: 10 PID: 4410 Comm: bash Not tainted 4.13.0-rc7-00074-ge89ce1f89f62-dirty #34
task: c0000003a82b4400 task.stack: c0000003af55c000
NIP: c0000000000a7b38 LR: c000000000659044 CTR: c0000000000a7b00
REGS: c00000000fd23d80 TRAP: 0100 Not tainted (4.13.0-rc7-00074-ge89ce1f89f62-dirty)
MSR: 90000000000c1033 <SF,HV,ME,IR,DR,RI,LE>
CR: 28422222 XER: 20000000
CFAR: c0000000000a7b38 SOFTE: 0
GPR00: c000000000659044 c0000003af55fbb0 c000000001072a00 0000000000000078
GPR04: c0000003c81b5c80 c0000003c81cc7e8 9000000000009033 0000000000000000
GPR08: 0000000000000000 c0000000000a7b00 0000000000000001 9000000000001003
GPR12: c0000000000a7b00 c00000000fd83200 0000000010180df8 0000000010189e60
GPR16: 0000000010189ed8 0000000010151270 000000001018bd88 000000001018de78
GPR20: 00000000370a0668 0000000000000001 00000000101645e0 0000000010163c10
GPR24: 00007fffd14d6294 00007fffd14d6290 c000000000fba6f0 0000000000000004
GPR28: c000000000f351d8 0000000000000078 c000000000f4095c 0000000000000000
NIP [c0000000000a7b38] sysrq_handle_xmon+0x38/0x40
LR [c000000000659044] __handle_sysrq+0xe4/0x270
Call Trace:
[c0000003af55fbd0] [c000000000659044] __handle_sysrq+0xe4/0x270
[c0000003af55fc70] [c000000000659810] write_sysrq_trigger+0x70/0xa0
[c0000003af55fca0] [c0000000003da650] proc_reg_write+0xb0/0x110
[c0000003af55fcf0] [c0000000003423bc] __vfs_write+0x6c/0x1b0
[c0000003af55fd90] [c000000000344398] vfs_write+0xd8/0x240
[c0000003af55fde0] [c00000000034632c] SyS_write+0x6c/0x110
[c0000003af55fe30] [c00000000000b220] system_call+0x58/0x6c

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Use kernel types for opal_signal_system_reset()]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Merge airlied/drm-next into drm-misc-next

Just catching up with upstream.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

Merge tag 'v4.14-rc2' into patchwork

Linux 4.14-rc2

* tag 'v4.14-rc2': (12066 commits)
Linux 4.14-rc2
tpm: ibmvtpm: simplify crq initialization and document crq format
tpm: replace msleep() w

Merge tag 'v4.14-rc2' into patchwork

Linux 4.14-rc2

* tag 'v4.14-rc2': (12066 commits)
Linux 4.14-rc2
tpm: ibmvtpm: simplify crq initialization and document crq format
tpm: replace msleep() with usleep_range() in TPM 1.2/2.0 generic drivers
Documentation: tpm: add powered-while-suspended binding documentation
tpm: tpm_crb: constify acpi_device_id.
tpm: vtpm: constify vio_device_id
security: fix description of values returned by cap_inode_need_killpriv
x86/asm: Fix inline asm call constraints for Clang
objtool: Handle another GCC stack pointer adjustment bug
inet: fix improper empty comparison
net: use inet6_rcv_saddr to compare sockets
net: set tb->fast_sk_family
net: orphan frags on stand-alone ptype in dev_queue_xmit_nit
MAINTAINERS: update git tree locations for ieee802154 subsystem
SMB3: Don't ignore O_SYNC/O_DSYNC and O_DIRECT flags
SMB3: handle new statx fields
arch: remove unused *_segments() macros/functions
parisc: Unbreak bootloader due to gcc-7 optimizations
parisc: Reintroduce option to gzip-compress the kernel
apparmor: fix apparmorfs DAC access permissions
...

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Merge drm-upstream/drm-next into drm-intel-next-queued

Need MST sideband message transaction to power up/down nodes.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge tag 'v4.14-rc2' into k.o/for-next

Merge my for-next branch to Linux 4.14-rc2 and open up the for-next area
for 4.15 kernel development.

Signed-off-by: Doug Ledford <dledford@redhat.com>

Merge tag 'v4.14-rc2' into next-general

Linux 4.14-rc2

Sync to v4.14-rc2 for security subsystem developers to track.

Merge tag 'ib-mfd-many-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into next

Merge "Immutable branch between MFD and many other subsystems due for
the v4.14 merge window" to get

Merge tag 'ib-mfd-many-v4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd into next

Merge "Immutable branch between MFD and many other subsystems due for
the v4.14 merge window" to get the TWL headers moved to the right place.

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Merge remote-tracking branch 'origin/master' into drm-misc-fixes

Pick up 4.14-rc1

Signed-off-by: Sean Paul <seanpaul@chromium.org>

Merge tag 'v4.14-rc1' into asoc-rockchip

Linux 4.14-rc1

Merge branches 'fixes' and 'misc' into for-linus

Merge tag 'powerpc-4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
"Nothing really major this release, despite quite a lot of acti

Merge tag 'powerpc-4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
"Nothing really major this release, despite quite a lot of activity.
Just lots of things all over the place.

Some things of note include:

- Access via perf to a new type of PMU (IMC) on Power9, which can
count both core events as well as nest unit events (Memory
controller etc).

- Optimisations to the radix MMU TLB flushing, mostly to avoid
unnecessary Page Walk Cache (PWC) flushes when the structure of the
tree is not changing.

- Reworks/cleanups of do_page_fault() to modernise it and bring it
closer to other architectures where possible.

- Rework of our page table walking so that THP updates only need to
send IPIs to CPUs where the affected mm has run, rather than all
CPUs.

- The size of our vmalloc area is increased to 56T on 64-bit hash MMU
systems. This avoids problems with the percpu allocator on systems
with very sparse NUMA layouts.

- STRICT_KERNEL_RWX support on PPC32.

- A new sched domain topology for Power9, to capture the fact that
pairs of cores may share an L2 cache.

- Power9 support for VAS, which is a new mechanism for accessing
coprocessors, and initial support for using it with the NX
compression accelerator.

- Major work on the instruction emulation support, adding support for
many new instructions, and reworking it so it can be used to
implement the emulation needed to fixup alignment faults.

- Support for guests under PowerVM to use the Power9 XIVE interrupt
controller.

And probably that many things again that are almost as interesting,
but I had to keep the list short. Plus the usual fixes and cleanups as
always.

Thanks to: Alexey Kardashevskiy, Alistair Popple, Andreas Schwab,
Aneesh Kumar K.V, Anju T Sudhakar, Arvind Yadav, Balbir Singh,
Benjamin Herrenschmidt, Bhumika Goyal, Breno Leitao, Bryant G. Ly,
Christophe Leroy, Cédric Le Goater, Dan Carpenter, Dou Liyang,
Frederic Barrat, Gautham R. Shenoy, Geliang Tang, Geoff Levand, Hannes
Reinecke, Haren Myneni, Ivan Mikhaylov, John Allen, Julia Lawall,
LABBE Corentin, Laurentiu Tudor, Madhavan Srinivasan, Markus Elfring,
Masahiro Yamada, Matt Brown, Michael Neuling, Murilo Opsfelder Araujo,
Nathan Fontenot, Naveen N. Rao, Nicholas Piggin, Oliver O'Halloran,
Paul Mackerras, Rashmica Gupta, Rob Herring, Rui Teng, Sam Bobroff,
Santosh Sivaraj, Scott Wood, Shilpasri G Bhat, Sukadev Bhattiprolu,
Suraj Jitindar Singh, Tobin C. Harding, Victor Aoqui"

* tag 'powerpc-4.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (321 commits)
powerpc/xive: Fix section __init warning
powerpc: Fix kernel crash in emulation of vector loads and stores
powerpc/xive: improve debugging macros
powerpc/xive: add XIVE Exploitation Mode to CAS
powerpc/xive: introduce H_INT_ESB hcall
powerpc/xive: add the HW IRQ number under xive_irq_data
powerpc/xive: introduce xive_esb_write()
powerpc/xive: rename xive_poke_esb() in xive_esb_read()
powerpc/xive: guest exploitation of the XIVE interrupt controller
powerpc/xive: introduce a common routine xive_queue_page_alloc()
powerpc/sstep: Avoid used uninitialized error
axonram: Return directly after a failed kzalloc() in axon_ram_probe()
axonram: Improve a size determination in axon_ram_probe()
axonram: Delete an error message for a failed memory allocation in axon_ram_probe()
powerpc/powernv/npu: Move tlb flush before launching ATSD
powerpc/macintosh: constify wf_sensor_ops structures
powerpc/iommu: Use permission-specific DEVICE_ATTR variants
powerpc/eeh: Delete an error out of memory message at init time
powerpc/mm: Use seq_putc() in two functions
macintosh: Convert to using %pOF instead of full_name
...

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powerpc/asm: Convert .llong directives to .8byte

.llong is an undocumented PPC specific directive. The generic
equivalent is .quad, but even better (because it's self describing) is
.8byte.

Convert

powerpc/asm: Convert .llong directives to .8byte

.llong is an undocumented PPC specific directive. The generic
equivalent is .quad, but even better (because it's self describing) is
.8byte.

Convert all .llong directives to .8byte.

Signed-off-by: Tobin C. Harding <me@tobin.cc>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Merge origin/master into drm-misc-fixes

Backmerge 4.13-rc5 into drm-misc-fixes, it was getting a
little stale.

Signed-off-by: Sean Paul <seanpaul@chromium.org>

Merge tag 'v4.13-rc1' into omap-for-v4.14/mmc-regulator

Linux v4.13-rc1

powerpc/powernv: Add support to clear sensor groups data

Adds support for clearing different sensor groups. OCC inband sensor
groups like CSM, Profiler, Job Scheduler can be cleared using this
drive

powerpc/powernv: Add support to clear sensor groups data

Adds support for clearing different sensor groups. OCC inband sensor
groups like CSM, Profiler, Job Scheduler can be cleared using this
driver. The min/max of all sensors belonging to these sensor groups
will be cleared.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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powerpc/powernv: Add support to set power-shifting-ratio

This patch adds support to set power-shifting-ratio which hints the
firmware how to distribute/throttle power between different entities
in a

powerpc/powernv: Add support to set power-shifting-ratio

This patch adds support to set power-shifting-ratio which hints the
firmware how to distribute/throttle power between different entities
in a system (e.g CPU v/s GPU). This ratio is used by OCC for power
capping algorithm.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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powerpc/powernv: Add support for powercap framework

Adds a generic powercap framework to change the system powercap
inband through OPAL-OCC command/response interface.

Signed-off-by: Shilpasri G Bh

powerpc/powernv: Add support for powercap framework

Adds a generic powercap framework to change the system powercap
inband through OPAL-OCC command/response interface.

Signed-off-by: Shilpasri G Bhat <shilpa.bhat@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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powerpc/powernv: Enable PCI peer-to-peer

P9 has support for PCI peer-to-peer, enabling a device to write in the
MMIO space of another device directly, without interrupting the CPU.

This patch adds

powerpc/powernv: Enable PCI peer-to-peer

P9 has support for PCI peer-to-peer, enabling a device to write in the
MMIO space of another device directly, without interrupting the CPU.

This patch adds support for it on powernv, by adding a new API to be
called by drivers. The pnv_pci_set_p2p(...) call configures an
'initiator', i.e the device which will issue the MMIO operation, and a
'target', i.e. the device on the receiving side.

P9 really only supports MMIO stores for the time being but that's
expected to change in the future, so the API allows to define both
load and store operations.

/* PCI p2p descriptor */
#define OPAL_PCI_P2P_ENABLE 0x1
#define OPAL_PCI_P2P_LOAD 0x2
#define OPAL_PCI_P2P_STORE 0x4

int pnv_pci_set_p2p(struct pci_dev *initiator, struct pci_dev *target,
u64 desc)

It uses a new OPAL call, as the configuration magic is done on the
PHBs by skiboot.

Signed-off-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Reviewed-by: Russell Currey <ruscur@russell.cc>
[mpe: Drop unrelated OPAL calls, s/uint64_t/u64/, minor formatting]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Merge branch 'for-linus' into for-next

Back-merge 4.13-rc devel branch for later development.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

Merge tag 'asoc-fix-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v4.13

Quite a few fixes here that have been sent since the merge window,

Merge tag 'asoc-fix-v4.13-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v4.13

Quite a few fixes here that have been sent since the merge window, the
biggest one is the fix from Tony for some confusion with the device
property API which was causing issues with the of-graph card. This is
fixed with some changes in the graph API itself as it seemed very likely
to be error prone.

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Merge branch 'perf/urgent' into perf/core, to pick up latest fixes and refresh the tree

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge airlied/drm-next into drm-intel-next-queued

Resync with upstream to avoid git getting too badly confused. Also, we
have a conflict with the drm_vblank_cleanup removal, which cannot be
resolved

Merge airlied/drm-next into drm-intel-next-queued

Resync with upstream to avoid git getting too badly confused. Also, we
have a conflict with the drm_vblank_cleanup removal, which cannot be
resolved by simply taking our side. Bake that in properly.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Merge airlied/drm-next into drm-misc-next

I need this to be able to apply the deferred fbdev setup patches, I
need the relevant prep work that landed through the drm-intel tree.

Also squash in conf

Merge airlied/drm-next into drm-misc-next

I need this to be able to apply the deferred fbdev setup patches, I
need the relevant prep work that landed through the drm-intel tree.

Also squash in conflict fixup from Laurent Pinchart.

Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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sync to Linus v4.13-rc2 for subsystem developers to work against

powerpc/powernv: Add IMC OPAL APIs

In-Memory Collection (IMC) counters are performance monitoring
infrastructure. These counters need special sequence of SCOMs to
init/start/stop which is handled by

powerpc/powernv: Add IMC OPAL APIs

In-Memory Collection (IMC) counters are performance monitoring
infrastructure. These counters need special sequence of SCOMs to
init/start/stop which is handled by OPAL. And OPAL provides three APIs
to init and control these IMC engines.

OPAL API documentation:
https://github.com/open-power/skiboot/blob/master/doc/opal-api/opal-imc-counters.rst

Patch updates the kernel side powernv platform code to support the new
OPAL APIs

Signed-off-by: Hemant Kumar <hemant@linux.vnet.ibm.com>
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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