Merge tag 'kvmarm-fixes-6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.12, take #1

- Fix pKVM error path on init, making sure we do not chang

Merge tag 'kvmarm-fixes-6.12-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.12, take #1

- Fix pKVM error path on init, making sure we do not change critical
system registers as we're about to fail

- Make sure that the host's vector length is at capped by a value
common to all CPUs

- Fix kvm_has_feat*() handling of "negative" features, as the current
code is pretty broken

- Promote Joey to the status of official reviewer, while James steps
down -- hopefully only temporarly

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Merge tag 'asoc-fix-v6.12-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v6.12

A bunch of fixes here that came in during the merge window and t

Merge tag 'asoc-fix-v6.12-rc1' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound into for-linus

ASoC: Fixes for v6.12

A bunch of fixes here that came in during the merge window and the first
week of release, plus some new quirks and device IDs. There's nothing
major here, it's a bit bigger than it might've been due to there being
no fixes sent during the merge window due to your vacation.

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

Required for a panthor fix that broke when
FOP_UNSIGNED_OFFSET was added in place of FMODE_UNSIGNED_OFFSET.

Signed-off-by: Maarten L

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

Required for a panthor fix that broke when
FOP_UNSIGNED_OFFSET was added in place of FMODE_UNSIGNED_OFFSET.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

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Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net

Cross-merge networking fixes after downstream PR.

No conflicts and no adjacent changes.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Merge tag 's390-6.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Vasily Gorbik:

- Clean up and improve vdso code: use SYM_* macros for function and

Merge tag 's390-6.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux

Pull more s390 updates from Vasily Gorbik:

- Clean up and improve vdso code: use SYM_* macros for function and
data annotations, add CFI annotations to fix GDB unwinding, optimize
the chacha20 implementation

- Add vfio-ap driver feature advertisement for use by libvirt and
mdevctl

* tag 's390-6.12-2' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/vfio-ap: Driver feature advertisement
s390/vdso: Use one large alternative instead of an alternative branch
s390/vdso: Use SYM_DATA_START_LOCAL()/SYM_DATA_END() for data objects
tools: Add additional SYM_*() stubs to linkage.h
s390/vdso: Use macros for annotation of asm functions
s390/vdso: Add CFI annotations to __arch_chacha20_blocks_nostack()
s390/vdso: Fix comment within __arch_chacha20_blocks_nostack()
s390/vdso: Get rid of permutation constants

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s390/vdso: Use one large alternative instead of an alternative branch

Replace the alternative branch with a larger alternative that contains
both paths. That way the two paths are closer together an

s390/vdso: Use one large alternative instead of an alternative branch

Replace the alternative branch with a larger alternative that contains
both paths. That way the two paths are closer together and it is easier
to change both paths if the need should arise.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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s390/vdso: Use SYM_DATA_START_LOCAL()/SYM_DATA_END() for data objects

Use SYM_DATA_START_LOCAL()/SYM_DATA_END() in vgetrandom-chacha.S so
that the constants end up in an object with correct size:

r

s390/vdso: Use SYM_DATA_START_LOCAL()/SYM_DATA_END() for data objects

Use SYM_DATA_START_LOCAL()/SYM_DATA_END() in vgetrandom-chacha.S so
that the constants end up in an object with correct size:

readelf -Ws vgetrandom-chacha.o
Num: Value Size Type Bind Vis Ndx Name
...
5: 0000000000000000 32 OBJECT LOCAL DEFAULT 5 chacha20_constants

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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s390/vdso: Add CFI annotations to __arch_chacha20_blocks_nostack()

This allows proper unwinding, for instance when using a debugger such
as GDB.

Signed-off-by: Jens Remus <jremus@linux.ibm.com>
Sig

s390/vdso: Add CFI annotations to __arch_chacha20_blocks_nostack()

This allows proper unwinding, for instance when using a debugger such
as GDB.

Signed-off-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Acked-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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s390/vdso: Fix comment within __arch_chacha20_blocks_nostack()

Fix comment within __arch_chacha20_blocks_nostack() so the comment
reflects what the code is doing.

Signed-off-by: Heiko Carstens <hca

s390/vdso: Fix comment within __arch_chacha20_blocks_nostack()

Fix comment within __arch_chacha20_blocks_nostack() so the comment
reflects what the code is doing.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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s390/vdso: Get rid of permutation constants

The three byte masks for VECTOR PERMUTE are not needed, since the
instruction VECTOR SHIFT LEFT DOUBLE BY BYTE can be used to implement
the required "rota

s390/vdso: Get rid of permutation constants

The three byte masks for VECTOR PERMUTE are not needed, since the
instruction VECTOR SHIFT LEFT DOUBLE BY BYTE can be used to implement
the required "rotate left" easily.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Jens Remus <jremus@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>

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Merge tag 'random-6.12-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random

Pull random number generator updates from Jason Donenfeld:
"Originally I'd planned on sending each

Merge tag 'random-6.12-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random

Pull random number generator updates from Jason Donenfeld:
"Originally I'd planned on sending each of the vDSO getrandom()
architecture ports to their respective arch trees. But as we started
to work on this, we found lots of interesting issues in the shared
code and infrastructure, the fixes for which the various archs needed
to base their work.

So in the end, this turned into a nice collaborative effort fixing up
issues and porting to 5 new architectures -- arm64, powerpc64,
powerpc32, s390x, and loongarch64 -- with everybody pitching in and
commenting on each other's code. It was a fun development cycle.

This contains:

- Numerous fixups to the vDSO selftest infrastructure, getting it
running successfully on more platforms, and fixing bugs in it.

- Additions to the vDSO getrandom & chacha selftests. Basically every
time manual review unearthed a bug in a revision of an arch patch,
or an ambiguity, the tests were augmented.

By the time the last arch was submitted for review, s390x, v1 of
the series was essentially fine right out of the gate.

- Fixes to the the generic C implementation of vDSO getrandom, to
build and run successfully on all archs, decoupling it from
assumptions we had (unintentionally) made on x86_64 that didn't
carry through to the other architectures.

- Port of vDSO getrandom to LoongArch64, from Xi Ruoyao and acked by
Huacai Chen.

- Port of vDSO getrandom to ARM64, from Adhemerval Zanella and acked
by Will Deacon.

- Port of vDSO getrandom to PowerPC, in both 32-bit and 64-bit
varieties, from Christophe Leroy and acked by Michael Ellerman.

- Port of vDSO getrandom to S390X from Heiko Carstens, the arch
maintainer.

While it'd be natural for there to be things to fix up over the course
of the development cycle, these patches got a decent amount of review
from a fairly diverse crew of folks on the mailing lists, and, for the
most part, they've been cooking in linux-next, which has been helpful
for ironing out build issues.

In terms of architectures, I think that mostly takes care of the
important 64-bit archs with hardware still being produced and running
production loads in settings where vDSO getrandom is likely to help.

Arguably there's still RISC-V left, and we'll see for 6.13 whether
they find it useful and submit a port"

* tag 'random-6.12-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random: (47 commits)
selftests: vDSO: check cpu caps before running chacha test
s390/vdso: Wire up getrandom() vdso implementation
s390/vdso: Move vdso symbol handling to separate header file
s390/vdso: Allow alternatives in vdso code
s390/module: Provide find_section() helper
s390/facility: Let test_facility() generate static branch if possible
s390/alternatives: Remove ALT_FACILITY_EARLY
s390/facility: Disable compile time optimization for decompressor code
selftests: vDSO: fix vdso_config for s390
selftests: vDSO: fix ELF hash table entry size for s390x
powerpc/vdso: Wire up getrandom() vDSO implementation on VDSO64
powerpc/vdso: Wire up getrandom() vDSO implementation on VDSO32
powerpc/vdso: Refactor CFLAGS for CVDSO build
powerpc/vdso32: Add crtsavres
mm: Define VM_DROPPABLE for powerpc/32
powerpc/vdso: Fix VDSO data access when running in a non-root time namespace
selftests: vDSO: don't include generated headers for chacha test
arm64: vDSO: Wire up getrandom() vDSO implementation
arm64: alternative: make alternative_has_cap_likely() VDSO compatible
selftests: vDSO: also test counter in vdso_test_chacha
...

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s390/vdso: Wire up getrandom() vdso implementation

Provide the s390 specific vdso getrandom() architecture backend.

_vdso_rng_data required data is placed within the _vdso_data vvar page,
by using

s390/vdso: Wire up getrandom() vdso implementation

Provide the s390 specific vdso getrandom() architecture backend.

_vdso_rng_data required data is placed within the _vdso_data vvar page,
by using a hardcoded offset larger than vdso_data.

As required the chacha20 implementation does not write to the stack.

The implementation follows more or less the arm64 implementations and
makes use of vector instructions. It has a fallback to the getrandom()
system call for machines where the vector facility is not installed.

The check if the vector facility is installed, as well as an
optimization for machines with the vector-enhancements facility 2, is
implemented with alternatives, avoiding runtime checks.

Note that __kernel_getrandom() is implemented without the vdso user
wrapper which would setup a stack frame for odd cases (aka very old
glibc variants) where the caller has not done that. All callers of
__kernel_getrandom() are required to setup a stack frame, like the C ABI
requires it.

The vdso testcases vdso_test_getrandom and vdso_test_chacha pass.

Benchmark on a z16:

$ ./vdso_test_getrandom bench-single
vdso: 25000000 times in 0.493703559 seconds
syscall: 25000000 times in 6.584025337 seconds

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

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