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linux/arch/arm64/kernel
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Catalin Marinas fdb9ebc7fb arm64: mte: Fix PTRACE_{PEEK,POKE}MTETAGS error documentation 
PTRACE_{PEEK,POKE}MTETAGS return -EIO rather than -EOPNOTSUPP (as
documented) when no tags are copied from/to a mapping without PROT_MTE.
This has been the behaviour since the interface was introduced, though
the original intent was to distinguish between address not being
accessible and mapped as untagged.

Update the documentation to match the implementation (de-facto ABI).
Since -EOPNOTSUPP was never returned, change the error assignment to
-EIO as well to avoid confusion.

Fixes: df9d7a22dd ("arm64: mte: Add Memory Tagging Extension documentation")
Fixes: 18ddbaa02b ("arm64: mte: ptrace: Add PTRACE_{PEEK,POKE}MTETAGS support")
Reported-by: Yury Khrustalev <yury.khrustalev@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
2026-09-11 12:50:02 +00:00
..
pi Arm: 2026-08-25 11:48:04 -07:00
probes arm64: kprobes: Allow reentering kprobes while single-stepping 2026-07-17 19:03:08 +01:00
vdso stackleak: Split KSTACK_ERASE_CFLAGS from GCC_PLUGINS_CFLAGS 2025-07-21 21:40:57 -07:00
vdso32 arm64: vdso32: Respect COMPAT_32BIT_TIME 2026-07-07 23:52:53 +02:00
.gitignore
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
acpi.c cpu/hotplug: Fix NULL kobject warning in cpuhp_smt_enable() 2026-06-29 11:47:36 +01:00
alternative.c arm64: Reject modules with internal alternative callbacks 2025-11-07 15:00:14 +00:00
armv8_deprecated.c arm64: armv8_deprecated: Disable swp emulation when FEAT_LSUI present 2026-03-27 17:29:10 +00:00
asm-offsets.c KVM: arm64: Avoid mismatched accesses to 'struct kvm_nvhe_init_params' 2026-08-19 12:22:24 -07:00
cacheinfo.c arm64: cacheinfo: Avoid out-of-bounds write to cacheinfo array 2025-02-07 09:57:56 +00:00
compat_alignment.c arm64: compat: Fix decrementing LDM/STM alignment emulation 2026-08-27 14:16:04 +00:00
cpu_errata.c arm64: errata: pass REVIDR when matching target implementation CPUs 2026-09-03 13:02:01 +00:00
cpu_ops.c
cpu-reset.S arm64: kernel: remove SHF_WRITE|SHF_EXECINSTR from .idmap.text 2023-05-02 12:42:22 +01:00
cpufeature.c arm64: Don't read GMID_EL1 when MTE is disabled 2026-09-03 13:03:23 +00:00
cpuinfo.c arm64: Don't read GMID_EL1 when MTE is disabled 2026-09-03 13:03:23 +00:00
crash_dump.c
debug-monitors.c arm64: debug: don't mask DAIF for mdscr_write() 2026-08-06 13:07:45 +00:00
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: Avoid voluntary preemption with efi_mm installed 2026-08-12 10:21:20 +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: entry: Avoid unnecessary local_irq_disable() on kernel exit 2026-08-11 11:35:08 +00:00
entry-ftrace.S arm64: Fix double word in comments 2025-11-12 17:07:59 +00:00
entry.S arm64: entry: mask DAIF before returning from C EL1 handlers 2026-08-06 13:07:46 +00:00
fpsimd.c arm64: Avoid eager DVMSync reclaim batches with C1-Pro SME erratum 2026-06-29 12:00:37 +01:00
ftrace.c arm64: ftrace: prepare ftrace_modify_call() for use without CALL_OPS 2026-07-22 20:50:51 +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 arm64: hibernate: pass HVC_SET_VECTORS args to the resume hvc 2026-09-09 12:51:20 +00:00
hibernate.c arm64: hibernate: clone only the linear map that exists at runtime 2026-09-11 12:14:43 +00:00
hw_breakpoint.c arm64/hw_breakpoint: reject unaligned watchpoints that would truncate BAS 2026-06-19 17:04:57 +01:00
hyp-stub.S KVM: arm64: Don't populate TPIDR_EL2 in finalise_el2() 2026-05-27 15:30:39 +01:00
idle.c arch: arm64: add early_param idle=<wfi|yield|nop> 2026-08-06 13:10:03 +00:00
image-vars.h Merge branch 'kvm-arm64/vtr-patch' into next 2026-08-19 14:05:49 -07:00
image.h
io.c arm64: Use new fallback IO memcpy/memset 2024-10-28 21:44:29 +00:00
irq.c arm64: panic from init_IRQ if IRQ handler stacks cannot be allocated 2026-05-19 12:27:10 +01:00
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_file.c arm64: kexec_file: Add support for crashkernel CMA reservation 2026-06-30 18:49:06 +03:00
machine_kexec.c arm64: trans_pgd: clone only the linear map that exists at runtime 2026-09-03 13:01:15 +00:00
Makefile arm64: fpsimd: Move SME save/restore inline 2026-06-03 16:50:49 +01:00
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
mpam.c arm64: mpam: Initialise and context switch the MPAMSM_EL1 register 2026-03-27 15:29:02 +00:00
mte.c arm64: mte: Fix PTRACE_{PEEK,POKE}MTETAGS error documentation 2026-09-11 12:50:02 +00:00
paravirt.c arm64/paravirt: Use common code for paravirt_steal_clock() 2026-01-12 16:30:00 +01:00
patching.c arm64: patching: replace min_t with min in __text_poke 2026-06-03 21:15:24 +01:00
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: Avoid eager DVMSync reclaim batches with C1-Pro SME erratum 2026-06-29 12:00:37 +01:00
proton-pack.c arm64: proton-pack: Restore the nospectre_bhb command-line option 2026-07-28 10:29:25 +00:00
psci.c arm64: psci: Ignore DENIED CPUs 2024-06-28 18:38:31 +01:00
ptrace.c Generic entry code updates: 2026-08-18 15:00:56 -07:00
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: Provide dcache_by_myline_op_nosync helper 2026-03-13 23:46:32 +01:00
return_address.c
rsi.c arm64/coco: Add pKVM as a CC platform 2026-07-21 22:27:47 +00:00
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: remove early_ioremap_reset() call and __late_* macros 2026-08-06 18:57:22 -07:00
signal.c arm64: signal: Preserve POR_EL0 if poe_context is missing 2026-05-01 17:44:25 +01:00
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_spin_table.c treewide: Drop function_nocfi 2022-09-26 10:13:14 -07:00
smp.c Merge branch 'for-next/sdei' into for-next/core 2026-08-14 10:16:12 +00:00
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
static_call.c arm64: static_call: include asm/insns.h 2026-06-19 15:27:33 +01:00
suspend.c arm64: suspend: rely on daif helpers to handle PMR 2026-08-06 13:07:45 +00:00
sys_compat.c Merge branch 'for-next/c1-pro-erratum-4193714' into for-next/core 2026-04-20 13:12:35 +01:00
sys.c arm64: generate 64-bit syscall.tbl 2024-07-10 14:23:38 +02:00
sys32.c fs: fix archiecture-specific compat_ftruncate64 2026-03-23 12:41:57 +01:00
syscall.c randomize_kstack: Unify random source across arches 2026-03-24 21:12:03 -07:00
time.c
topology.c arm64: topology: read CPPC FFH feedback counters in one operation 2026-07-22 20:01:23 +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 arm64 updates for 7.2 2026-06-16 05:18:04 +05:30
watchdog_hld.c arm64/watchdog_hld: Add a cpufreq notifier for update watchdog thresh 2025-07-04 13:17:30 +01:00