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8ff443cebf
linux/arch/arm64/kernel
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Mark Rutland 8ff443cebf arm64: irq: rework root IRQ handler registration 
If we accidentally unmask IRQs before we've registered a root IRQ
handler, handle_arch_irq will be NULL, and the IRQ exception handler
will branch to a bogus address.

To make this easier to debug, this patch initialises handle_arch_irq to
a default handler which will panic(), making such problems easier to
debug. When we add support for FIQ handlers, we can follow the same
approach.

When we add support for a root FIQ handler, it's possible to have root
IRQ handler without an root FIQ handler, and in theory the inverse is
also possible. To permit this, and to keep the IRQ/FIQ registration
logic similar, this patch removes the panic in the absence of a root IRQ
controller. Instead, set_handle_irq() logs when a handler is registered,
which is sufficient for debug purposes.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Hector Martin <marcan@marcan.st>
Cc: James Morse <james.morse@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210315115629.57191-4-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2021-03-24 20:19:30 +00:00
..
probes arm64 fixes for -rc1 2021-02-26 10:19:03 -08:00
vdso clang-lto series for v5.12-rc1 2021-02-23 09:28:51 -08:00
vdso32 arm64: do not descend to vdso directories twice 2021-01-20 12:18:46 +00:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
acpi_numa.c arm64, numa: Change the numa init functions name to be generic 2021-01-14 15:08:54 -08:00
acpi_parking_protocol.c
acpi.c arm64: permit ACPI core to map kernel memory used for table overrides 2020-09-30 22:27:51 +01:00
alternative.c arm64: improve whitespace 2021-02-04 13:59:49 +00:00
armv8_deprecated.c arm64: uaccess: rename privileged uaccess routines 2020-12-02 19:49:10 +00:00
asm-offsets.c arm64: Honor VHE being disabled from the command-line 2021-02-09 13:50:56 +00:00
cacheinfo.c arm64 updates for 5.3: 2019-07-08 09:54:55 -07:00
cpu_errata.c arm64: entry: consolidate Cortex-A76 erratum 1463225 workaround 2021-02-08 17:39:02 +00:00
cpu_ops.c arm64: Introduce get_cpu_ops() helper function 2020-03-24 17:24:19 +00:00
cpu-reset.h
cpu-reset.S arm64/relocate_kernel: remove redundant code 2020-09-11 19:06:25 +01:00
cpufeature.c arm64 updates for 5.12 2021-02-21 13:08:42 -08:00
cpuidle.c arm64: Introduce get_cpu_ops() helper function 2020-03-24 17:24:19 +00:00
cpuinfo.c arm64: avoid -Woverride-init warning 2020-10-28 13:38:36 +00:00
crash_core.c arm64/crash_core: Export TCR_EL1.T1SZ in vmcoreinfo 2020-07-02 17:56:49 +01:00
crash_dump.c
debug-monitors.c arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00
efi-entry.S arm64 updates for 5.8 2020-06-01 15:18:27 -07:00
efi-header.S arm64: head: tidy up the Image header definition 2020-11-17 16:14:20 +00:00
efi-rt-wrapper.S Merge branch 'for-next/scs' into for-next/core 2020-05-28 18:03:40 +01:00
efi.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
entry-common.c arm64: entry: consolidate Cortex-A76 erratum 1463225 workaround 2021-02-08 17:39:02 +00:00
entry-fpsimd.S arm64/sve: Implement a helper to load SVE registers from FPSIMD state 2020-09-21 18:06:33 +01:00
entry-ftrace.S arm64: rename S_FRAME_SIZE to PT_REGS_SIZE 2021-01-13 15:09:06 +00:00
entry.S Merge branch 'for-next/stacktrace' into for-next/core 2021-02-12 15:14:22 +00:00
fpsimd.c arm64: reject prctl(PR_PAC_RESET_KEYS) on compat tasks 2020-10-15 10:50:09 +01:00
ftrace.c arm64: ftrace: Change CONFIG_FTRACE_WITH_REGS to CONFIG_DYNAMIC_FTRACE_WITH_REGS 2020-06-08 15:44:59 +01:00
head.S arm64: mm: use a 48-bit ID map when possible on 52-bit VA builds 2021-03-11 13:04:28 +00:00
hibernate-asm.S arm64: kernel: Convert to modern annotations for assembly functions 2020-05-04 12:46:03 +01:00
hibernate.c arm64: hibernate: add __force attribute to gfp_t casting 2021-02-01 15:57:30 +00:00
hw_breakpoint.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
hyp-stub.S arm64: Add missing ISB after invalidating TLB in enter_vhe 2021-02-24 11:35:36 +00:00
idreg-override.c arm64: Drop support for CMDLINE_EXTEND 2021-03-08 12:56:34 +00:00
image-vars.h KVM: arm64: Don't access PMSELR_EL0/PMUSERENR_EL0 when no PMU is available 2021-03-06 04:18:40 -05:00
image.h arm64: get rid of TEXT_OFFSET 2020-09-07 15:00:52 +01:00
insn.c arm64: kprobe: disable probe of fault prone ptrauth instruction 2020-09-14 12:07:02 +01:00
io.c
irq.c arm64: irq: rework root IRQ handler registration 2021-03-24 20:19:30 +00:00
jump_label.c
kaslr.c arm64: Move "nokaslr" over to the early cpufeature infrastructure 2021-02-09 13:50:57 +00:00
kexec_image.c arm64: kexec_file: Fix sparse warning 2020-11-10 13:11:44 +00:00
kgdb.c arm64: kgdb: Fix single-step exception handling oops 2020-07-08 22:18:54 +01:00
kuser32.S docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
machine_kexec_file.c arm64: kexec_file: fix memory leakage in create_dtb() when fdt_open_into() fails 2021-02-19 17:57:40 +00:00
machine_kexec.c arm64: kexec: call kexec_image_info only once 2021-01-27 15:41:12 +00:00
Makefile Merge branch 'for-next/vdso' into for-next/core 2021-02-12 15:17:42 +00:00
module-plts.c arm64: improve whitespace 2021-02-04 13:59:49 +00:00
module.c kasan, arm64: expand CONFIG_KASAN checks 2020-12-22 12:55:08 -08:00
mte.c arm64: kasan: simplify and inline MTE functions 2021-02-26 09:41:03 -08:00
paravirt.c arm64: paravirt: Initialize steal time when cpu is online 2020-09-17 18:12:18 +01:00
pci.c PCI: Constify struct pci_ecam_ops 2020-05-01 16:28:59 +01:00
perf_callchain.c arm64: stacktrace: Make stack walk callback consistent with generic code 2020-09-18 14:24:16 +01:00
perf_event.c arm64: perf: Fix 64-bit event counter read truncation 2021-03-10 11:08:23 +00:00
perf_regs.c perf/arch: Remove perf_sample_data::regs_user_copy 2020-11-09 18:12:34 +01:00
pointer_auth.c arm64: reject prctl(PR_PAC_RESET_KEYS) on compat tasks 2020-10-15 10:50:09 +01:00
process.c arch: setup PF_IO_WORKER threads like PF_KTHREAD 2021-02-21 17:25:22 -07:00
proton-pack.c Merge remote-tracking branch 'arm64/for-next/fixes' into for-next/core 2020-12-09 18:04:55 +00:00
psci.c arm64: psci: Avoid printing in cpu_psci_cpu_die() 2020-11-10 13:11:44 +00:00
ptrace.c arm64: ptrace: Fix seccomp of traced syscall -1 (NO_SYSCALL) 2021-02-25 10:27:43 +00:00
reloc_test_core.c
reloc_test_syms.S arm64: kernel: Convert to modern annotations for assembly functions 2020-05-04 12:46:03 +01:00
relocate_kernel.S arm64: kexec: arm64_relocate_new_kernel don't use x0 as temp 2021-01-27 15:41:12 +00:00
return_address.c arm64: stacktrace: Make stack walk callback consistent with generic code 2020-09-18 14:24:16 +01:00
sdei.c Merge branch 'kvm-master' into kvm-next 2021-01-07 18:06:52 -05:00
setup.c arm64: Extract early FDT mapping from kaslr_early_init() 2021-02-09 13:47:50 +00:00
signal32.c arm64: compat: Always use sigpage for sigreturn trampoline 2020-06-23 14:56:24 +01:00
signal.c arm64: entry: remove redundant IRQ flag tracing 2021-01-13 12:51:30 +00:00
sigreturn32.S
sleep.S arm64: Initialise as nVHE before switching to VHE 2021-02-09 13:47:07 +00:00
smccc-call.S arm64/kernel: Remove needless Call Frame Information annotations 2020-09-01 09:50:36 +02:00
smp_spin_table.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
smp.c KVM: arm64: Apply hyp relocations at runtime 2021-01-23 14:01:00 +00:00
stacktrace.c arm64: stacktrace: Report when we reach the end of the stack 2021-02-25 10:34:51 +00:00
suspend.c arm64: spectre: Prevent lockdep splat on v4 mitigation enable path 2021-02-19 17:49:24 +00:00
sys32.c
sys_compat.c arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00
sys.c
syscall.c arm64: entry: consolidate Cortex-A76 erratum 1463225 workaround 2021-02-08 17:39:02 +00:00
time.c arm64: time: Replace <linux/clk-provider.h> by <linux/of_clk.h> 2020-02-12 17:26:38 +00:00
topology.c arm64: topology: Make AMUs work with modular cpufreq drivers 2021-01-20 12:49:40 +00:00
trace-events-emulation.h
traps.c arm64: improve whitespace 2021-02-04 13:59:49 +00:00
vdso32-wrap.S arm64: do not descend to vdso directories twice 2021-01-20 12:18:46 +00:00
vdso-wrap.S arm64: do not descend to vdso directories twice 2021-01-20 12:18:46 +00:00
vdso.c mm: forbid splitting special mappings 2020-12-15 12:13:41 -08:00
vmlinux.lds.S x86: 2021-02-21 13:31:43 -08:00