[AMDGPU] Optimize SGPR splat reg sequences for packed 64-bit instructions (#217182)
This work optimizes SGPR register sequences for packed 64-bit instructions by eliminating
redundant register copies when a scalar value is splatted across multiple lanes.
The optimization is implemented in SIFoldOperands::tryFoldSGPRSplatRegSequence, which:
1. Detects SGPR register sequences where all elements are identical
2. Verifies all uses are packed 64-bit instructions supporting single
SGPR read
3. Replaces redundant elements with undef to allow copy elimination
This reduces SGPR register pressure and eliminates unnecessary copies in
kernels using packed operations with splat scalars.
NAS-142151 / 26.0.0-RC.1 / Resolve migrated USB devices by their vendor and product ids (#19494)
## Problem
A USB passthrough device is named after the port it is plugged into,
which is what 25.10 stored. The 26.0 pre-releases built the same shape
of name out of the bus and device number instead — an enumeration
counter the kernel reissues on every replug — so those stored values
name a port nobody chose.
The incus migration has the same preference the same way round: it
resolves a device by the bus and device number the manifest carries and
only falls back to the vendor and product ids when those are missing. It
picks the counter that gets reused over the identity that survives a
replug, and because it runs exactly once per machine and is never run
again, a wrong row it writes stays wrong. There is no second run, no
manifest retained afterwards, and no repair path.
This matters for a population that has not been hit yet:
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Allow pool import with corrupted spare/l2arc configs
That information should not be critical for read-only imports, and
imports with zfs_recover. Let the import proceed by just dropping
those devices and trying to recover it with small space leak.
While there, allow zdb to report errors when dumping those objects.
Reviewed-by: Brian Behlendorf <behlendorf1 at llnl.gov>
Signed-off-by: Alexander Motin <alexander.motin at TrueNAS.com>
Closes #18937
ztest: remove ztest_mmp_enable_disable()
If the ztest child process is killed while ztest_mmp_enable_disable()
has multihost temporarily enabled, the last-synced uberblock is left
with a nonzero ub_mmp_delay. Reopening the pool on the next pass
then triggers the MMP activity check, and on a system with no hostid
set spa_open() returns EREMOTEIO instead of the expected ENOENT,
tripping the VERIFY3S() in ztest_run().
Remove the function. It provides no real additional test coverage:
the mmp thread start and stop paths are already exercised by every
pool import and export, and multihost protection and property
handling are covered by the ZTS mmp test group.
Reviewed-by: Brian Behlendorf <behlendorf1 at llnl.gov>
Signed-off-by: Michael Heller <michael.heller at gmail.com>
Issue #18918
Closes #18935
debian: make native-deb rebuilds idempotent
`override_dh_auto_configure` creates five init symlinks in `debian/`
with plain `ln -s`. On a rebuild those symlinks already exist from the
previous build, so `ln` fails with "ln: Already exists" and the whole
`dpkg-buildpackage` run aborts.
Use `ln -sf` so the symlinks are recreated idempotently, and list them
in `debian/clean` so a clean removes them. This lets `make native-deb`
be re-run without first cleaning the tree.
Reviewed-by: Brian Behlendorf <behlendorf1 at llnl.gov>
Signed-off-by: Axel Gembe <axel at gembe.net>
Closes #18929
[SLP]Fix unscheduled-deps assertion for cmp with identical operands
Same-operands cmps (icmp sge %x, %x) took the reordered dependency
counting path, which undercounts the second use while scheduling
releases one dep per operand column. Treat them as non-commutative so
each use is checked against its own edge.
Fixes #217408
Reviewers:
Pull Request: https://github.com/llvm/llvm-project/pull/217495
Reject CHARACTER types in AssignSimple and add death tests
AssignSimple is only intended for trivial intrinsic types (integer, real,
complex, logical). Add a guard that crashes on CHARACTER type input,
matching the existing derived-type guard.
Add death tests covering all five crash paths in AssignSimple: rank
mismatch, element-bytes mismatch, derived type, character type, and
non-allocatable element count mismatch.
Co-Authored-By: Claude Opus 4 (1M context) <noreply at anthropic.com>
Merge tag 'v7.3-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto update from Herbert Xu:
"API:
- Add af_alg_restrict sysctl and white list
- Fix potential suspend/resume races in hwrng
Algorithms:
- Optimize vli additive operations using compiler builtins in ecc
Drivers:
- Remove unsafe/deprecated algorithms from qce
- Mark qce as BROKEN
- Add runtime PM and interconnect bandwidth scaling support to qce
- Remove crypto_rng from qcom, sun8i and caam
- Fix SG list issues in iaa
- Fix SEV init path bugs in ccp"
* tag 'v7.3-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (122 commits)
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[NewPM] Port CFIInstrInserter to the new pass manager
Adds a newPM pass for CFIInstrInserter (cfi-instr-inserter).
- Extracts the pass's working state (MBBVector, CSRLocMap) and logic
into a CFIInstrInserterImpl class with a run method, called by both
the legacy pass and the new pass manager pass.
- Renames the old pass with the "Legacy" suffix.
- Adds the new pass manager pass CFIInstrInserterPass, using
RequiredPassInfoMixin: the legacy pass's runOnMachineFunction never
calls skipFunction, so it always runs unconditionally and should not
be skippable in the new PM either. run() unconditionally returns
PreservedAnalyses::all(), matching the legacy pass's own
AU.setPreservesAll() declaration -- the same shape CFIFixupPass (an
already-ported sibling CFI pass) already uses.
- Updates MachinePassRegistry.def, PassBuilder, and CodeGenPassBuilder.
- Wires the pass into X86's and RISC-V's newPM pipelines, matching
their existing legacy-PM gating conditions:
- X86 replaces an existing TODO inside an already-correct
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[NewPM] Port FuncletLayout to the new pass manager (#217490)
Adds a newPM pass for FuncletLayout (funclet-layout).
- Extracts the pass's logic (which has no per-instance state) into a
shared runFuncletLayout free function, called by both the legacy pass
and the new pass manager pass.
- Renames the old pass with the "Legacy" suffix.
- Adds the new pass manager pass FuncletLayoutPass, using
RequiredPassInfoMixin: the legacy pass's runOnMachineFunction never
calls skipFunction, so it always runs unconditionally and should not be
skippable in the new PM either.
- Updates MachinePassRegistry.def, PassBuilder, and CodeGenPassBuilder
-- FuncletLayoutPass was already unconditionally invoked from
CodeGenPassBuilder.h via a DUMMY_MACHINE_FUNCTION_PASS stub, so no
separate enablement change was needed.
- Fixes four pipeline-dump tests (X86, RISC-V x2, Lanai) whose CHECK
lines expected the stub's class-name fallback ("FuncletLayoutPass")
rather than the real pass's registered pipeline name ("funclet-layout").
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Merge tag 'integrity-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
Pull integrity updates from Mimi Zohar:
- TPM initialization is sometimes delayed until deferred_probe_initcall
Since ordering is not guaranteed within the same initcall level, IMA
may initialize before the TPM and fall back to TPM-bypass mode. A new
config option, CONFIG_IMA_INIT_LATE_SYNC, allows those building the
kernel to defer IMA initialization to late_initcall_sync, accepting
the integrity risk of missing early measurements in exchange for
avoiding TPM-bypass mode.
- The raw policy rules are now measured, as well as the complete
policy, closing a gap in integrity measurement coverage
* tag 'integrity-v7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity:
ima: measure userspace policy writes before parsing
ima: add critical data measurement for loaded policy
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Revert "drm/amdgpu: fix aperture mapping leak"
From Asad Kamal
a2e326c52c4bcecc033cd3ca2733fdbe30fbf55d in linux-6.18.y/6.18.45
b96c529cd2551b78316a4afa3237b2ed96ba03c8 in mainline linux
