kernel.git/arch/arm64/kernel/sdei.c, branch linux-rolling-stable

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

2025-11-28T15:47:12Z

* arm64/for-next/perf: perf: arm_spe: Add support for filtering on data source perf: Add perf_event_attr::config4 perf/imx_ddr: Add support for PMU in DB (system interconnects) perf/imx_ddr: Get and enable optional clks perf/imx_ddr: Move ida_alloc() from ddr_perf_init() to ddr_perf_probe() dt-bindings: perf: fsl-imx-ddr: Add compatible string for i.MX8QM, i.MX8QXP and i.MX8DXL arch_topology: Provide a stub topology_core_has_smt() for !CONFIG_GENERIC_ARCH_TOPOLOGY perf/arm-ni: Fix and optimise register offset calculation perf: arm_pmuv3: Add new Cortex and C1 CPU PMUs perf: arm_cspmu: fix error handling in arm_cspmu_impl_unregister() perf/arm-ni: Add NoC S3 support perf/arm_cspmu: nvidia: Add pmevfiltr2 support perf/arm_cspmu: nvidia: Add revision id matching perf/arm_cspmu: Add pmpidr support perf/arm_cspmu: Add callback to reset filter config perf: arm_pmuv3: Don't use PMCCNTR_EL0 on SMT cores * for-next/misc: : Miscellaneous patches arm64: atomics: lse: Remove unused parameters from ATOMIC_FETCH_OP_AND macros arm64: remove duplicate ARCH_HAS_MEM_ENCRYPT arm64: mm: use untagged address to calculate page index arm64: mm: make linear mapping permission update more robust for patial range arm64/mm: Elide TLB flush in certain pte protection transitions arm64/mm: Rename try_pgd_pgtable_alloc_init_mm arm64/mm: Allow __create_pgd_mapping() to propagate pgtable_alloc() errors arm64: add unlikely hint to MTE async fault check in el0_svc_common arm64: acpi: add newline to deferred APEI warning arm64: entry: Clean out some indirection arm64/mm: Ensure PGD_SIZE is aligned to 64 bytes when PA_BITS = 52 arm64/mm: Drop cpu_set_[default|idmap]_tcr_t0sz() arm64: remove unused ARCH_PFN_OFFSET arm64: use SOFTIRQ_ON_OWN_STACK for enabling softirq stack arm64: Remove assertion on CONFIG_VMAP_STACK * for-next/kselftest: : arm64 kselftest patches kselftest/arm64: Align zt-test register dumps * for-next/efi-preempt: : arm64: Make EFI calls preemptible arm64/efi: Call EFI runtime services without disabling preemption arm64/efi: Move uaccess en/disable out of efi_set_pgd() arm64/efi: Drop efi_rt_lock spinlock from EFI arch wrapper arm64/fpsimd: Permit kernel mode NEON with IRQs off arm64/fpsimd: Don't warn when EFI execution context is preemptible efi/runtime-wrappers: Keep track of the efi_runtime_lock owner efi: Add missing static initializer for efi_mm::cpus_allowed_lock * for-next/assembler-macro: : arm64: Replace __ASSEMBLY__ with __ASSEMBLER__ in headers arm64: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-uapi headers arm64: Replace __ASSEMBLY__ with __ASSEMBLER__ in uapi headers * for-next/typos: : Random typo/spelling fixes arm64: Fix double word in comments arm64: Fix typos and spelling errors in comments * for-next/sme-ptrace-disable: : Support disabling streaming mode via ptrace on SME only systems kselftest/arm64: Cover disabling streaming mode without SVE in fp-ptrace kselftst/arm64: Test NT_ARM_SVE FPSIMD format writes on non-SVE systems arm64/sme: Support disabling streaming mode via ptrace on SME only systems * for-next/local-tlbi-page-reused: : arm64, mm: avoid TLBI broadcast if page reused in write fault arm64, tlbflush: don't TLBI broadcast if page reused in write fault mm: add spurious fault fixing support for huge pmd * for-next/mpam: (34 commits) : Basic Arm MPAM driver (more to follow) MAINTAINERS: new entry for MPAM Driver arm_mpam: Add kunit tests for props_mismatch() arm_mpam: Add kunit test for bitmap reset arm_mpam: Add helper to reset saved mbwu state arm_mpam: Use long MBWU counters if supported arm_mpam: Probe for long/lwd mbwu counters arm_mpam: Consider overflow in bandwidth counter state arm_mpam: Track bandwidth counter state for power management arm_mpam: Add mpam_msmon_read() to read monitor value arm_mpam: Add helpers to allocate monitors arm_mpam: Probe and reset the rest of the features arm_mpam: Allow configuration to be applied and restored during cpu online arm_mpam: Use a static key to indicate when mpam is enabled arm_mpam: Register and enable IRQs arm_mpam: Extend reset logic to allow devices to be reset any time arm_mpam: Add a helper to touch an MSC from any CPU arm_mpam: Reset MSC controls from cpuhp callbacks arm_mpam: Merge supported features during mpam_enable() into mpam_class arm_mpam: Probe the hardware features resctrl supports arm_mpam: Add helpers for managing the locking around the mon_sel registers ... * for-next/acpi: : arm64 acpi updates ACPI: GTDT: Get rid of acpi_arch_timer_mem_init() * for-next/documentation: : arm64 Documentation updates Documentation/arm64: Fix the typo of register names

arm64: Fix typos and spelling errors in comments

2025-11-12T17:06:21Z

This patch corrects several minor typographical and spelling errors in comments across multiple arm64 source files. No functional changes. Signed-off-by: mrigendrachaubey Signed-off-by: Catalin Marinas

arm64: Remove assertion on CONFIG_VMAP_STACK

2025-11-07T19:46:39Z

CONFIG_VMAP_STACK is selected by arm64 arch unconditionly since commit ef6861b8e6dd ("arm64: Mandate VMAP_STACK"). Remove the redundant assertion and headers. Signed-off-by: Dawei Li Acked-by: Will Deacon Signed-off-by: Catalin Marinas

arm64: ptrace: Replace interrupts_enabled() with regs_irqs_disabled()

2025-09-11T14:55:34Z

The generic entry code expects architecture code to provide regs_irqs_disabled(regs) function, but arm64 does not have this and provides interrupts_enabled(regs), which has the opposite polarity. In preparation for moving arm64 over to the generic entry code, relace arm64's interrupts_enabled() with regs_irqs_disabled() and update its callers under arch/arm64. For the moment, a definition of interrupts_enabled() is provided for the GICv3 driver. Once arch/arm implement regs_irqs_disabled(), this can be removed. Delete the fast_interrupts_enabled() macro as it is unused and we don't want any new users to show up. No functional changes. Reviewed-by: Ada Couprie Diaz Acked-by: Mark Rutland Suggested-by: Mark Rutland Signed-off-by: Jinjie Ruan Acked-by: Catalin Marinas Signed-off-by: Will Deacon

arm64: remove CONFIG_VMAP_STACK checks from SDEI stack handling

2025-07-08T12:41:09Z

With VMAP_STACK now always enabled on arm64, remove all CONFIG_VMAP_STACK conditionals from SDEI stack allocation and initialization in arch/arm64/kernel/sdei.c. This change unconditionally defines the SDEI stack pointers and replaces runtime checks with BUILD_BUG_ON() assertions, ensuring that the code is only built when VMAP_STACK is enabled. This simplifies the logic and reflects the mandatory use of VMAP_STACK for all arm64 kernel builds. Signed-off-by: Breno Leitao Acked-by: Ard Biesheuvel Acked-by: Mark Rutland Link: https://lore.kernel.org/r/20250707-arm64_vmap-v1-7-8de98ca0f91c@debian.org Signed-off-by: Will Deacon

arm64: sdei: abort running SDEI handlers during crash

2023-08-04T16:35:33Z

Interrupts are blocked in SDEI context, per the SDEI spec: "The client interrupts cannot preempt the event handler." If we crashed in the SDEI handler-running context (as with ACPI's AGDI) then we need to clean up the SDEI state before proceeding to the crash kernel so that the crash kernel can have working interrupts. Track the active SDEI handler per-cpu so that we can COMPLETE_AND_RESUME the handler, discarding the interrupted context. Fixes: f5df26961853 ("arm64: kernel: Add arch-specific SDEI entry code and CPU masking") Signed-off-by: D Scott Phillips Cc: stable@vger.kernel.org Reviewed-by: James Morse Tested-by: Mihai Carabas Link: https://lore.kernel.org/r/20230627002939.2758-1-scott@os.amperecomputing.com Signed-off-by: Will Deacon

arm64: implement dynamic shadow call stack for Clang

2022-11-09T18:06:35Z

Implement dynamic shadow call stack support on Clang, by parsing the unwind tables at init time to locate all occurrences of PACIASP/AUTIASP instructions, and replacing them with the shadow call stack push and pop instructions, respectively. This is useful because the overhead of the shadow call stack is difficult to justify on hardware that implements pointer authentication (PAC), and given that the PAC instructions are executed as NOPs on hardware that doesn't, we can just replace them without breaking anything. As PACIASP/AUTIASP are guaranteed to be paired with respect to manipulations of the return address, replacing them 1:1 with shadow call stack pushes and pops is guaranteed to result in the desired behavior. Signed-off-by: Ard Biesheuvel Reviewed-by: Sami Tolvanen Tested-by: Sami Tolvanen Link: https://lore.kernel.org/r/20221027155908.1940624-4-ardb@kernel.org Signed-off-by: Will Deacon

arm64: stacktrace: move SDEI stack helpers to stacktrace code

2022-09-09T11:30:07Z

For clarity and ease of maintenance, it would be helpful for all the stack helpers to be in the same place. Move the SDEI stack helpers into the stacktrace code where all the other stack helpers live. There should be no functional change as a result of this patch. Signed-off-by: Mark Rutland Reviewed-by: Kalesh Singh Reviewed-by: Madhavan T. Venkataraman Reviewed-by: Mark Brown Cc: Fuad Tabba Cc: James Morse Cc: Marc Zyngier Cc: Will Deacon Link: https://lore.kernel.org/r/20220901130646.1316937-5-mark.rutland@arm.com Signed-off-by: Catalin Marinas

arm64: kernel: add helper for booted at EL2 and not VHE

2021-10-01T12:30:59Z

Replace places that contain logic like this: is_hyp_mode_available() && !is_kernel_in_hyp_mode() With a dedicated boolean function is_hyp_nvhe(). This will be needed later in kexec in order to sooner switch back to EL2. Suggested-by: James Morse Signed-off-by: Pasha Tatashin Acked-by: Catalin Marinas Link: https://lore.kernel.org/r/20210930143113.1502553-2-pasha.tatashin@soleen.com Signed-off-by: Will Deacon

Merge branch 'for-next/entry' into for-next/core

2021-06-24T13:01:55Z

The never-ending entry.S refactoring continues, putting us in a much better place wrt compiler instrumentation whilst moving more of the code into C. * for-next/entry: arm64: idle: don't instrument idle code with KCOV arm64: entry: don't instrument entry code with KCOV arm64: entry: make NMI entry/exit functions static arm64: entry: split SDEI entry arm64: entry: split bad stack entry arm64: entry: fold el1_inv() into el1h_64_sync_handler() arm64: entry: handle all vectors with C arm64: entry: template the entry asm functions arm64: entry: improve bad_mode() arm64: entry: move bad_mode() to entry-common.c arm64: entry: consolidate EL1 exception returns arm64: entry: organise entry vectors consistently arm64: entry: organise entry handlers consistently arm64: entry: convert IRQ+FIQ handlers to C arm64: entry: add a call_on_irq_stack helper arm64: entry: move NMI preempt logic to C arm64: entry: move arm64_preempt_schedule_irq to entry-common.c arm64: entry: convert SError handlers to C arm64: entry: unmask IRQ+FIQ after EL0 handling arm64: remove redundant local_daif_mask() in bad_mode()