Merge branch 'next' into for-linus

Prepare input updates for 6.14 merge window.

Merge tag 'v6.13-rc3' into next

Sync up with the mainline.

Merge remote-tracking branch 'pm/opp/linux-next' into HEAD

Merge pm/opp tree to get dev_pm_opp_get_bw()

Signed-off-by: Rob Clark <robdclark@chromium.org>

Merge drm/drm-next into drm-intel-next

Catching up with 6.13-rc2.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

Merge drm/drm-next into drm-xe-next

A backmerge to get the PMT preparation work for
merging the BMG PMT support.

Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

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

Kickstart 6.14 cycle.

Signed-off-by: Maxime Ripard <mripard@kernel.org>

Merge tag 'v6.13-rc1' into perf/core, to refresh the branch

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

Merge tag 'asoc-fix-v6.13-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v6.13

A few small fixes for v6.13, all system specific - the biggest t

Merge tag 'asoc-fix-v6.13-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v6.13

A few small fixes for v6.13, all system specific - the biggest thing is
the fix for jack handling over suspend on some Intel laptops.

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Merge tag 'powerpc-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

- Rework kfence support for the HPT MMU to work on systems wit

Merge tag 'powerpc-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:

- Rework kfence support for the HPT MMU to work on systems with >= 16TB
of RAM.

- Remove the powerpc "maple" platform, used by the "Yellow Dog
Powerstation".

- Add support for DYNAMIC_FTRACE_WITH_CALL_OPS,
DYNAMIC_FTRACE_WITH_DIRECT_CALLS & BPF Trampolines.

- Add support for running KVM nested guests on Power11.

- Other small features, cleanups and fixes.

Thanks to Amit Machhiwal, Arnd Bergmann, Christophe Leroy, Costa
Shulyupin, David Hunter, David Wang, Disha Goel, Gautam Menghani, Geert
Uytterhoeven, Hari Bathini, Julia Lawall, Kajol Jain, Keith Packard,
Lukas Bulwahn, Madhavan Srinivasan, Markus Elfring, Michal Suchanek,
Ming Lei, Mukesh Kumar Chaurasiya, Nathan Chancellor, Naveen N Rao,
Nicholas Piggin, Nysal Jan K.A, Paulo Miguel Almeida, Pavithra Prakash,
Ritesh Harjani (IBM), Rob Herring (Arm), Sachin P Bappalige, Shen
Lichuan, Simon Horman, Sourabh Jain, Thomas Weißschuh, Thorsten Blum,
Thorsten Leemhuis, Venkat Rao Bagalkote, Zhang Zekun, and zhang jiao.

* tag 'powerpc-6.13-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (89 commits)
EDAC/powerpc: Remove PPC_MAPLE drivers
powerpc/perf: Add per-task/process monitoring to vpa_pmu driver
powerpc/kvm: Add vpa latency counters to kvm_vcpu_arch
docs: ABI: sysfs-bus-event_source-devices-vpa-pmu: Document sysfs event format entries for vpa_pmu
powerpc/perf: Add perf interface to expose vpa counters
MAINTAINERS: powerpc: Mark Maddy as "M"
powerpc/Makefile: Allow overriding CPP
powerpc-km82xx.c: replace of_node_put() with __free
ps3: Correct some typos in comments
powerpc/kexec: Fix return of uninitialized variable
macintosh: Use common error handling code in via_pmu_led_init()
powerpc/powermac: Use of_property_match_string() in pmac_has_backlight_type()
powerpc: remove dead config options for MPC85xx platform support
powerpc/xive: Use cpumask_intersects()
selftests/powerpc: Remove the path after initialization.
powerpc/xmon: symbol lookup length fixed
powerpc/ep8248e: Use %pa to format resource_size_t
powerpc/ps3: Reorganize kerneldoc parameter names
KVM: PPC: Book3S HV: Fix kmv -> kvm typo
powerpc/sstep: make emulate_vsx_load and emulate_vsx_store static
...

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powerpc64/ftrace: Support .text larger than 32MB with out-of-line stubs

We are restricted to a .text size of ~32MB when using out-of-line
function profile sequence. Allow this to be extended up to t

powerpc64/ftrace: Support .text larger than 32MB with out-of-line stubs

We are restricted to a .text size of ~32MB when using out-of-line
function profile sequence. Allow this to be extended up to the previous
limit of ~64MB by reserving space in the middle of .text.

A new config option CONFIG_PPC_FTRACE_OUT_OF_LINE_NUM_RESERVE is
introduced to specify the number of function stubs that are reserved in
.text. On boot, ftrace utilizes stubs from this area first before using
the stub area at the end of .text.

A ppc64le defconfig has ~44k functions that can be traced. A more
conservative value of 32k functions is chosen as the default value of
PPC_FTRACE_OUT_OF_LINE_NUM_RESERVE so that we do not allot more space
than necessary by default. If building a kernel that only has 32k
trace-able functions, we won't allot any more space at the end of .text
during the pass on vmlinux.o. Otherwise, only the remaining functions
get space for stubs at the end of .text. This default value should help
cover a .text size of ~48MB in total (including space reserved at the
end of .text which can cover up to 32MB), which should be sufficient for
most common builds. For a very small kernel build, this can be set to 0.
Or, this can be bumped up to a larger value to support vmlinux .text
size up to ~64MB.

Signed-off-by: Naveen N Rao <naveen@kernel.org>
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://patch.msgid.link/20241030070850.1361304-14-hbathini@linux.ibm.com

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powerpc64/ftrace: Move ftrace sequence out of line

Function profile sequence on powerpc includes two instructions at the
beginning of each function:
mflr r0
bl ftrace_caller

The call to ftrace_ca

powerpc64/ftrace: Move ftrace sequence out of line

Function profile sequence on powerpc includes two instructions at the
beginning of each function:
mflr r0
bl ftrace_caller

The call to ftrace_caller() gets nop'ed out during kernel boot and is
patched in when ftrace is enabled.

Given the sequence, we cannot return from ftrace_caller with 'blr' as we
need to keep LR and r0 intact. This results in link stack (return
address predictor) imbalance when ftrace is enabled. To address that, we
would like to use a three instruction sequence:
mflr r0
bl ftrace_caller
mtlr r0

Further more, to support DYNAMIC_FTRACE_WITH_CALL_OPS, we need to
reserve two instruction slots before the function. This results in a
total of five instruction slots to be reserved for ftrace use on each
function that is traced.

Move the function profile sequence out-of-line to minimize its impact.
To do this, we reserve a single nop at function entry using
-fpatchable-function-entry=1 and add a pass on vmlinux.o to determine
the total number of functions that can be traced. This is then used to
generate a .S file reserving the appropriate amount of space for use as
ftrace stubs, which is built and linked into vmlinux.

On bootup, the stub space is split into separate stubs per function and
populated with the proper instruction sequence. A pointer to the
associated stub is maintained in dyn_arch_ftrace.

For modules, space for ftrace stubs is reserved from the generic module
stub space.

This is restricted to and enabled by default only on 64-bit powerpc,
though there are some changes to accommodate 32-bit powerpc. This is
done so that 32-bit powerpc could choose to opt into this based on
further tests and benchmarks.

As an example, after this patch, kernel functions will have a single nop
at function entry:
<kernel_clone>:
addis r2,r12,467
addi r2,r2,-16028
nop
mfocrf r11,8
...

When ftrace is enabled, the nop is converted to an unconditional branch
to the stub associated with that function:
<kernel_clone>:
addis r2,r12,467
addi r2,r2,-16028
b ftrace_ool_stub_text_end+0x11b28
mfocrf r11,8
...

The associated stub:
<ftrace_ool_stub_text_end+0x11b28>:
mflr r0
bl ftrace_caller
mtlr r0
b kernel_clone+0xc
...

This change showed an improvement of ~10% in null_syscall benchmark on a
Power 10 system with ftrace enabled.

Signed-off-by: Naveen N Rao <naveen@kernel.org>
Signed-off-by: Hari Bathini <hbathini@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://patch.msgid.link/20241030070850.1361304-13-hbathini@linux.ibm.com

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