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linux/arch/arm64/kernel
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Sumit Gupta df6e4ab654 arm64: topology: Fix false warning in counters_read_on_cpu() for same-CPU reads 
The counters_read_on_cpu() function warns when called with IRQs
disabled to prevent deadlock in smp_call_function_single(). However,
this warning is spurious when reading counters on the current CPU,
since no IPI is needed for same CPU reads.

Commit 12eb8f4fff24 ("cpufreq: CPPC: Update FIE arch_freq_scale in
ticks for non-PCC regs") changed the CPPC Frequency Invariance Engine
to read AMU counters directly from the scheduler tick for non-PCC
register spaces (like FFH), instead of deferring to a kthread. This
means counters_read_on_cpu() is now called with IRQs disabled from the
tick handler, triggering the warning.

Fix this by restructuring the logic: when IRQs are disabled (tick
context), call the function directly for same-CPU reads. Otherwise
use smp_call_function_single().

Fixes: 997c021abc ("cpufreq: CPPC: Update FIE arch_freq_scale in ticks for non-PCC regs")
Suggested-by: Will Deacon <will@kernel.org>
Signed-off-by: Sumit Gupta <sumitg@nvidia.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-02-26 18:27:15 +00:00
..
pi arm64 updates for 6.19: 2025-12-02 17:03:55 -08:00
probes Performance events changes for v7.0: 2026-02-10 12:00:46 -08:00
vdso stackleak: Split KSTACK_ERASE_CFLAGS from GCC_PLUGINS_CFLAGS 2025-07-21 21:40:57 -07:00
vdso32 arm64: vdso32: Provide clock_getres_time64() 2026-01-13 14:42:23 +01:00
.gitignore
acpi.c arm64: io: Rename ioremap_prot() to __ioremap_prot() 2026-02-25 19:49:51 +00:00
acpi_numa.c arm64: ACPI: NUMA: initialize all values of acpi_early_node_map to NUMA_NO_NODE 2024-08-14 17:51:39 +01:00
acpi_parking_protocol.c arm64: smp: Remove dedicated wakeup IPI 2023-09-25 17:15:28 +01:00
alternative.c arm64: Reject modules with internal alternative callbacks 2025-11-07 15:00:14 +00:00
armv8_deprecated.c sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-24 20:59:29 +02:00
asm-offsets.c arch: Add the macro COMPILE_OFFSETS to all the asm-offsets.c 2025-09-25 09:57:15 +02:00
cacheinfo.c arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array 2025-02-07 09:57:56 +00:00
compat_alignment.c arm64: Don't call NULL in do_compat_alignment_fixup() 2025-04-01 14:13:11 +01:00
cpu-reset.S arm64: kernel: remove SHF_WRITE|SHF_EXECINSTR from .idmap.text 2023-05-02 12:42:22 +01:00
cpu_errata.c arm64: errata: Workaround for SI L1 downstream coherency issue 2026-01-23 13:30:38 +00:00
cpu_ops.c
cpufeature.c Loongarch: 2026-02-13 11:31:15 -08:00
cpuinfo.c arm64: Add support for FEAT_{LS64, LS64_V} 2026-01-22 13:24:49 +00:00
crash_dump.c vmcore: convert copy_oldmem_page() to take an iov_iter 2022-04-29 14:37:59 -07:00
debug-monitors.c arm64 updates for 6.18 2025-09-29 18:48:39 -07:00
efi-header.S include: pe.h: Fix PE definitions 2025-05-21 16:46:37 +02:00
efi-rt-wrapper.S arm64: efi: Avoid workqueue to check whether EFI runtime is live 2023-01-16 15:27:31 +01:00
efi.c arm64/efi: Call EFI runtime services without disabling preemption 2025-11-11 18:59:22 +00:00
elfcore.c fs: avoid mmap sem relocks when coredumping with many missing pages 2025-02-21 10:25:32 +01:00
entry-common.c arm64 updates for 6.19: 2025-12-02 17:03:55 -08:00
entry-fpsimd.S arm64/sme: Implement context switching for ZT0 2023-01-20 12:23:06 +00:00
entry-ftrace.S arm64: Fix double word in comments 2025-11-12 17:07:59 +00:00
entry.S arm64 updates for 6.17: 2025-07-29 20:21:54 -07:00
fpsimd.c arm64/efi: Remove unneeded SVE/SME fallback preserve/store handling 2025-12-15 12:05:37 +00:00
ftrace.c arm64: Fix typos and spelling errors in comments 2025-11-12 17:06:21 +00:00
head.S KVM: arm64: Trap MTE access and discovery when MTE is disabled 2026-01-23 11:28:48 +00:00
hibernate-asm.S
hibernate.c arm64: Set __nocfi on swsusp_arch_resume() 2026-01-23 18:13:07 +00:00
hw_breakpoint.c arm64: debug: split hardware watchpoint exception entry 2025-07-08 13:27:42 +01:00
hyp-stub.S KVM: arm64: GICv3: Detect and work around the lack of ICV_DIR_EL1 trapping 2025-11-24 14:29:11 -08:00
idle.c arm64: idle: Tag the arm64 idle functions as __cpuidle 2023-09-25 17:15:28 +01:00
image-vars.h Loongarch: 2026-02-13 11:31:15 -08:00
image.h
io.c arm64: Use new fallback IO memcpy/memset 2024-10-28 21:44:29 +00:00
irq.c arm64: use SOFTIRQ_ON_OWN_STACK for enabling softirq stack 2025-11-07 19:55:52 +00:00
jump_label.c asm-generic: introduce text-patching.h 2024-11-07 14:25:15 -08:00
kaslr.c arm64/mm: Remove randomization of the linear map 2025-04-29 13:21:49 +01:00
kexec_image.c arm64: kernel: initialize missing kexec_buf->random field 2026-01-05 21:27:43 +00:00
kgdb.c arm64: debug: call step handlers statically 2025-07-08 13:27:41 +01:00
kuser32.S arm64: Update Documentation/arm references 2023-06-12 06:33:48 -06:00
machine_kexec.c arm64: Fix typos and spelling errors in comments 2025-11-12 17:06:21 +00:00
machine_kexec_file.c Convert 'alloc_flex' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
Makefile arm64 updates for 6.17: 2025-07-29 20:21:54 -07:00
Makefile.syscalls syscalls: fix syscall macros for newfstat/newfstatat 2024-08-02 15:20:47 +02:00
module-plts.c arm64: ftrace: fix unreachable PLT for ftrace_caller in init_module with CONFIG_DYNAMIC_FTRACE 2025-09-05 16:56:20 +01:00
module.c arm64: Reject modules with internal alternative callbacks 2025-11-07 15:00:14 +00:00
mte.c mm/huge_memory: initialise the tags of the huge zero folio 2025-11-09 21:19:46 -08:00
paravirt.c arm64/paravirt: Use common code for paravirt_steal_clock() 2026-01-12 16:30:00 +01:00
patching.c arm64: patching: avoid early page_to_phys() 2024-12-03 18:05:42 +00:00
pci.c arm64: PCI: Migrate ACPI related functions to pci-acpi.c 2024-08-27 15:48:34 +02:00
perf_callchain.c perf/core: Correct perf sampling with guest VMs 2024-11-14 10:40:01 +01:00
perf_regs.c perf: arm64: Add SVE vector granule register to user regs 2022-09-22 15:06:02 +01:00
pointer_auth.c
process.c arm64/gcs: Flush the GCS locking state on exec 2025-12-15 12:06:40 +00:00
proton-pack.c arm64: Add support for TSV110 Spectre-BHB mitigation 2026-01-05 21:07:49 +00:00
psci.c arm64: psci: Ignore DENIED CPUs 2024-06-28 18:38:31 +01:00
ptrace.c arm64 updates for 7.0 2026-02-09 20:28:45 -08:00
reloc_test_core.c ARM64: reloc_test: add missing MODULE_DESCRIPTION() macro 2024-06-13 10:23:54 +01:00
reloc_test_syms.S
relocate_kernel.S arm64: kexec: load from kimage prior to clobbering 2022-05-17 14:25:35 +01:00
return_address.c
rsi.c arm64: realm: ioremap: Allow mapping memory as encrypted 2025-09-19 10:12:01 +01:00
sdei.c Merge branches 'for-next/misc', 'for-next/kselftest', 'for-next/efi-preempt', 'for-next/assembler-macro', 'for-next/typos', 'for-next/sme-ptrace-disable', 'for-next/local-tlbi-page-reused', 'for-next/mpam', 'for-next/acpi' and 'for-next/documentation', remote-tracking branch 'arm64/for-next/perf' into for-next/core 2025-11-28 15:47:12 +00:00
setup.c arm64: map [_text, _stext) virtual address range non-executable+read-only 2025-09-22 11:58:17 +01:00
signal.c arm64/fpsimd: signal: Fix restoration of SVE context 2026-01-22 10:10:39 +00:00
signal32.c arm64/fpsimd: signal32: Always save+flush state early 2025-04-09 18:06:31 +01:00
sigreturn32.S arm64: rework compat syscall macros 2024-07-10 14:23:38 +02:00
sleep.S arm64: mm: Handle LVA support as a CPU feature 2024-02-16 12:42:36 +00:00
smccc-call.S arm64: smccc: Remove broken support for SMCCCv1.3 SVE discard hint 2024-11-07 11:18:52 +00:00
smp.c arm64 updates for 6.19: 2025-12-02 17:03:55 -08:00
smp_spin_table.c treewide: Drop function_nocfi 2022-09-26 10:13:14 -07:00
stacktrace.c Merge branches 'for-next/livepatch', 'for-next/user-contig-bbml2', 'for-next/misc', 'for-next/acpi', 'for-next/debug-entry', 'for-next/feat_mte_tagged_far', 'for-next/kselftest', 'for-next/mdscr-cleanup' and 'for-next/vmap-stack', remote-tracking branch 'arm64/for-next/perf' into for-next/core 2025-07-24 16:01:22 +01:00
suspend.c arm64/sme: Restore SME registers on exit from suspend 2024-02-20 12:19:15 +00:00
sys.c arm64: generate 64-bit syscall.tbl 2024-07-10 14:23:38 +02:00
sys32.c arm64: convert unistd_32.h to syscall.tbl format 2024-07-10 14:23:38 +02:00
sys_compat.c arm64: tlb: Optimize ARM64_WORKAROUND_REPEAT_TLBI 2026-02-25 21:37:44 +00:00
syscall.c arm64: add unlikely hint to MTE async fault check in el0_svc_common 2025-11-11 19:49:19 +00:00
time.c
topology.c arm64: topology: Fix false warning in counters_read_on_cpu() for same-CPU reads 2026-02-26 18:27:15 +00:00
trace-events-emulation.h tracing/treewide: Remove second parameter of __assign_str() 2024-05-22 20:14:47 -04:00
traps.c arm64: Fix typos and spelling errors in comments 2025-11-12 17:06:21 +00:00
vdso-wrap.S
vdso.c Convert more 'alloc_obj' cases to default GFP_KERNEL arguments 2026-02-21 20:03:00 -08:00
vdso32-wrap.S
vmcore_info.c arm64/sysreg: Replace TCR_EL1 field macros 2025-11-13 15:58:30 +00:00
vmlinux.lds.S ARM: 2025-05-29 08:10:01 -07:00
watchdog_hld.c arm64/watchdog_hld: Add a cpufreq notifier for update watchdog thresh 2025-07-04 13:17:30 +01:00