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3889ba7010
linux/arch/arm64/include/asm
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Mark Rutland 3889ba7010 arm64: irq: allow FIQs to be handled 
On contemporary platforms we don't use FIQ, and treat any stray FIQ as a
fatal event. However, some platforms have an interrupt controller wired
to FIQ, and need to handle FIQ as part of regular operation.

So that we can support both cases dynamically, this patch updates the
FIQ exception handling code to operate the same way as the IRQ handling
code, with its own handle_arch_fiq handler. Where a root FIQ handler is
not registered, an unexpected FIQ exception will trigger the default FIQ
handler, which will panic() as today. Where a root FIQ handler is
registered, handling of the FIQ is deferred to that handler.

As el0_fiq_invalid_compat is supplanted by el0_fiq, the former is
removed. For !CONFIG_COMPAT builds we never expect to take an exception
from AArch32 EL0, so we keep the common el0_fiq_invalid handler.

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/20210315115629.57191-7-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2021-03-24 20:19:30 +00:00
..
vdso vdso/treewide: Add vdso_data pointer argument to __arch_get_hw_counter() 2020-08-06 10:57:30 +02:00
xen xen/arm: do not setup the runstate info page if kpti is enabled 2020-10-04 18:41:33 -05:00
acenv.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
acpi.h arm64/acpi: disallow AML memory opregions to access kernel memory 2020-07-14 18:02:03 +01:00
alternative-macros.h arm64: alternatives: Split up alternative.h 2020-11-09 21:49:34 +00:00
alternative.h arm64: alternatives: Split up alternative.h 2020-11-09 21:49:34 +00:00
arch_gicv3.h arm64: Always keep DAIF.[IF] in sync 2021-03-24 20:19:30 +00:00
arch_timer.h arm64: arch_timer: Allow an workaround descriptor to disable compat vdso 2020-07-08 21:57:51 +01:00
archrandom.h arm64: Add support for SMCCC TRNG entropy source 2021-01-21 17:42:46 +00:00
arm_dsu_pmu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
arm-cci.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
asm_pointer_auth.h arm64: simplify ptrauth initialization 2020-04-28 11:23:21 +01:00
asm-bug.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
asm-offsets.h
asm-prototypes.h arm64: asm-prototypes: Fix fat-fingered typo in comment 2019-01-10 11:11:46 +00:00
asm-uaccess.h arm64: vmlinux.ld.S: add assertion for reserved_pg_dir offset 2021-02-03 20:43:45 +00:00
assembler.h arm64: Always keep DAIF.[IF] in sync 2021-03-24 20:19:30 +00:00
atomic_ll_sc.h arm64: Move the LSE gas support detection to Kconfig 2020-01-15 12:50:48 +00:00
atomic_lse.h arm64: lse: fix LSE atomics with LLVM's integrated assembler 2020-01-16 17:25:10 +00:00
atomic.h arm64: make atomic helpers __always_inline 2021-01-13 15:09:06 +00:00
barrier.h iommu/arm-smmu-v3: Ensure queue is read after updating prod pointer 2020-09-28 22:57:43 +01:00
bitops.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
bitrev.h
boot.h arm64: get rid of TEXT_OFFSET 2020-09-07 15:00:52 +01:00
brk-imm.h arm64: kprobes: Use BRK instead of single-step when executing instructions out-of-line 2020-11-03 14:03:38 +00:00
bug.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
cache.h arm64: kasan: simplify and inline MTE functions 2021-02-26 09:41:03 -08:00
cacheflush.h arm64: cacheflush: Remove stale comment 2021-01-26 23:40:23 +00:00
checksum.h arm64: csum: Fix handling of bad packets 2020-07-30 17:01:38 +01:00
clocksource.h arm64: Introduce asm/vdso/clocksource.h 2020-03-21 15:23:55 +01:00
cmpxchg.h arm64: fix unreachable code issue with cmpxchg 2019-09-17 12:11:50 +01:00
compat.h compat: lift compat_s64 and compat_u64 to <asm-generic/compat.h> 2020-09-17 13:00:46 -04:00
compiler.h arm64: use a common .arch preamble for inline assembly 2020-08-28 11:15:15 +01:00
cpu_ops.h arm64: fix some spelling mistakes in the comments by codespell 2020-09-07 14:18:50 +01:00
cpu.h Revert "arm64: initialize per-cpu offsets earlier" 2020-10-09 11:24:17 +01:00
cpucaps.h Merge remote-tracking branch 'origin/kvm-arm64/psci-relay' into kvmarm-master/next 2020-12-09 10:00:24 +00:00
cpufeature.h arm64: cpufeatures: Allow disabling of Pointer Auth from the command-line 2021-02-09 13:50:57 +00:00
cpuidle.h
cputype.h arm64: Add MIDR value for KRYO2XX gold/silver CPU cores 2020-11-13 09:47:08 +00:00
current.h
daifflags.h arm64: Always keep DAIF.[IF] in sync 2021-03-24 20:19:30 +00:00
dcc.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 284 2019-06-05 17:36:37 +02:00
debug-monitors.h arm64: kprobes: Use BRK instead of single-step when executing instructions out-of-line 2020-11-03 14:03:38 +00:00
device.h arm64: Remove dev->archdata.iommu pointer 2020-06-30 11:59:49 +02:00
dmi.h
efi.h efi: stub: get rid of efi_get_max_fdt_addr() 2020-12-09 08:37:27 +01:00
el2_setup.h arm64: Simplify init_el2_state to be non-VHE only 2021-02-09 13:47:11 +00:00
elf.h Split the old READ_IMPLIES_EXEC workaround from executable PT_GNU_STACK 2020-06-05 13:45:21 -07:00
esr.h arm64: mte: add in-kernel MTE helpers 2020-12-22 12:55:07 -08:00
exception.h arm64: entry: suppress W=1 prototype warnings 2020-12-15 12:38:02 +00:00
exec.h arm64: uaccess: remove set_fs() 2020-12-02 19:49:11 +00:00
extable.h arm64: Improve diagnostics when trapping BRK with FAULT_BRK_IMM 2020-09-18 16:35:54 +01:00
fb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
fixmap.h arm64/fixmap: make notes of fixed_addresses more precisely 2020-08-08 19:25:04 +01:00
fpsimd.h arm64/sve: Implement a helper to load SVE registers from FPSIMD state 2020-09-21 18:06:33 +01:00
fpsimdmacros.h arm64/sve: Implement a helper to flush SVE registers 2020-09-21 18:06:33 +01:00
ftrace.h arm64: implement ftrace with regs 2019-11-06 14:17:35 +00:00
futex.h arm64: uaccess: rename privileged uaccess routines 2020-12-02 19:49:10 +00:00
hardirq.h arm64: irqstat: Get rid of duplicated declaration 2020-11-23 10:31:05 +01:00
hugetlb.h arm64/hugetlb: Reserve CMA areas for gigantic pages on 16K and 64K configs 2020-07-15 13:38:03 +01:00
hw_breakpoint.h arm64: remove pointless __KERNEL__ guards 2019-08-05 11:06:33 +01:00
hwcap.h Merge branch 'for-next/mte' into for-next/core 2020-10-02 12:16:11 +01:00
hyp_image.h KVM: arm64: Add symbol at the beginning of each hyp section 2021-01-23 14:00:57 +00:00
hypervisor.h
image.h docs: arm64: convert docs to ReST and rename to .rst 2019-06-14 14:20:27 -06:00
insn.h arm64: alternatives: Split up alternative.h 2020-11-09 21:49:34 +00:00
io.h Add and use a generic version of devmem_is_allowed() 2020-12-11 12:30:26 -08:00
irq_work.h arm64: Kill __smp_cross_call and co 2020-09-17 16:37:28 +01:00
irq.h arm64: irq: allow FIQs to be handled 2021-03-24 20:19:30 +00:00
irqflags.h arm64: Always keep DAIF.[IF] in sync 2021-03-24 20:19:30 +00:00
jump_label.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
kasan.h arm64: kasan: simplify and inline MTE functions 2021-02-26 09:41:03 -08:00
Kbuild local64.h: make <asm/local64.h> mandatory 2020-12-29 15:36:49 -08:00
kernel-pgtable.h arm64: consistently use reserved_pg_dir 2020-11-10 17:30:40 +00:00
kexec.h arm64: kexec: move relocation function setup 2021-01-27 15:41:12 +00:00
kfence.h kfence: use pt_regs to generate stack trace on faults 2021-02-26 09:41:02 -08:00
kgdb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
kprobes.h arm64: kprobes: Remove redundant kprobe_step_ctx 2020-11-10 17:12:30 +00:00
kvm_arm.h KVM: arm64: Trap host SMCs in protected mode 2020-12-04 10:08:36 +00:00
kvm_asm.h KVM: arm64: Ensure I-cache isolation between vcpus of a same VM 2021-03-09 17:58:56 +00:00
kvm_emulate.h Merge branch 'kvm-master' into kvm-next 2021-01-07 18:06:52 -05:00
kvm_host.h KVM/arm64 updates for Linux 5.12 2021-02-12 11:23:44 -05:00
kvm_hyp.h KVM: arm64: Fix nVHE hyp panic host context restore 2021-03-06 04:18:40 -05:00
kvm_mmu.h KVM: arm64: Remove patching of fn pointers in hyp 2021-01-23 14:01:00 +00:00
kvm_pgtable.h KVM: arm64: Filter out the case of only changing permissions from stage-2 map path 2021-01-25 16:30:20 +00:00
kvm_ptrauth.h KVM: arm64: Update context references from host to hyp 2020-09-15 18:39:02 +01:00
kvm_ras.h arm64: KVM/mm: Move SEA handling behind a single 'claim' interface 2019-02-07 23:10:45 +01:00
kvm_types.h KVM: arm64: Use common KVM implementation of MMU memory caches 2020-07-09 13:29:43 -04:00
linkage.h arm64: Don't insert a BTI instruction at inner labels 2020-06-24 14:24:29 +01:00
lse.h arm64: lse: Fix LSE atomics with LLVM 2020-02-18 18:10:49 +00:00
memory.h arm64: kasan: fix page_alloc tagging with DEBUG_VIRTUAL 2021-03-09 13:19:21 +00:00
mman.h arm64: mte: Validate the PROT_MTE request via arch_validate_flags() 2020-09-04 12:46:07 +01:00
mmu_context.h arm64: mm: remove unused __cpu_uses_extended_idmap[_level()] 2021-03-11 13:04:28 +00:00
mmu.h KVM: arm64: Move BP hardening helpers into spectre.h 2020-11-16 10:40:18 +00:00
mmzone.h
module.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
module.lds.h arm64 module: set plt* section addresses to 0x0 2021-02-19 17:59:59 +00:00
mte-def.h arm64: kasan: simplify and inline MTE functions 2021-02-26 09:41:03 -08:00
mte-kasan.h arm64: kasan: simplify and inline MTE functions 2021-02-26 09:41:03 -08:00
mte.h arm64: kasan: simplify and inline MTE functions 2021-02-26 09:41:03 -08:00
neon-intrinsics.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
neon.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
numa.h numa: Move numa implementation to common code 2021-01-14 15:08:55 -08:00
page-def.h arm64/mm: Unify CONT_PTE_SHIFT 2020-09-11 16:33:43 +01:00
page.h arm64: mte: Add PROT_MTE support to mmap() and mprotect() 2020-09-04 12:46:07 +01:00
paravirt.h arm64: Retrieve stolen time as paravirtualized guest 2019-10-21 19:20:31 +01:00
pci.h arm64: Enable PCI write-combine resources under sysfs 2020-09-18 14:05:13 +01:00
percpu.h KVM: arm64: Support per_cpu_ptr in nVHE hyp code 2020-12-04 10:08:34 +00:00
perf_event.h arm64: perf: Add support caps under sysfs 2020-09-28 14:53:45 +01:00
pgalloc.h asm-generic: pgalloc: provide generic pgd_free() 2020-08-07 11:33:26 -07:00
pgtable-hwdef.h kasan: arm64: set TCR_EL1.TBID1 when enabled 2020-11-25 16:53:19 +00:00
pgtable-prot.h arm64: mte: Map hotplugged memory as Normal Tagged 2021-03-10 10:56:46 +00:00
pgtable-types.h arm64: add support for folded p4d page tables 2020-06-04 19:06:21 -07:00
pgtable.h arm64: mte: Map hotplugged memory as Normal Tagged 2021-03-10 10:56:46 +00:00
pointer_auth.h arm64: Defer enabling pointer authentication on boot core 2021-02-09 13:50:57 +00:00
preempt.h sched/rt, arm64: Use CONFIG_PREEMPTION 2019-12-08 14:37:32 +01:00
probes.h arm64/fpsimd: add <asm/insn.h> to <asm/kprobes.h> to fix fpsimd build 2020-11-23 10:59:00 +00:00
proc-fns.h arm64: mm: convert cpu_do_switch_mm() to C 2020-02-27 14:30:50 +00:00
processor.h arm64: Remove arm64_dma32_phys_limit and its uses 2021-01-12 17:49:25 +00:00
ptdump.h arm64: mm: convert mm/dump.c to use walk_page_range() 2020-02-04 03:05:25 +00:00
ptrace.h Merge branch 'kvm-master' into kvm-next 2021-01-07 18:06:52 -05:00
pvclock-abi.h KVM: arm64: Implement PV_TIME_FEATURES call 2019-10-21 19:20:27 +01:00
rwonce.h arm64: lto: Strengthen READ_ONCE() to acquire when CONFIG_LTO=y 2020-11-09 21:49:34 +00:00
scs.h scs: Move scs_overflow_check() out of architecture code 2020-05-18 17:47:40 +01:00
sdei.h arm64: Use the correct style for SPDX License Identifier 2019-04-16 16:28:01 +01:00
seccomp.h arm64: Enable seccomp architecture tracking 2020-11-20 11:16:34 -08:00
sections.h KVM: arm64: Apply hyp relocations at runtime 2021-01-23 14:01:00 +00:00
setup.h arm64: Extract early FDT mapping from kaslr_early_init() 2021-02-09 13:47:50 +00:00
shmparam.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
signal32.h arm64: remove pointless __KERNEL__ guards 2019-08-05 11:06:33 +01:00
signal.h arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00
simd.h arm64: fpsimd: Make sure SVE setup is complete before SIMD is used 2020-01-14 17:11:21 +00:00
smp_plat.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
smp.h arm64: Make cpu_logical_map() take unsigned int 2020-12-04 08:44:24 +00:00
sparsemem.h arm64/sparsemem: reduce SECTION_SIZE_BITS 2021-01-21 18:06:37 +00:00
spectre.h Merge remote-tracking branch 'origin/kvm-arm64/csv3' into kvmarm-master/queue 2020-12-03 19:12:24 +00:00
spinlock_types.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
spinlock.h locking/arch: Move qrwlock.h include after qspinlock.h 2021-02-11 07:59:54 -05:00
stack_pointer.h
stackprotector.h arm64: Defer enabling pointer authentication on boot core 2021-02-09 13:50:57 +00:00
stacktrace.h arm64: stacktrace: Make stack walk callback consistent with generic code 2020-09-18 14:24:16 +01:00
stage2_pgtable.h KVM: arm64: Remove unused page-table code 2020-09-11 15:51:15 +01:00
stat.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
string.h kasan, arm64: expand CONFIG_KASAN checks 2020-12-22 12:55:08 -08:00
suspend.h arm64: Preserve register x18 when CPU is suspended 2020-05-15 16:35:50 +01:00
sync_bitops.h arm64, locking/atomics: Use instrumented atomics 2018-11-01 11:01:40 +01:00
syscall_wrapper.h arm64: simplify syscall wrapper ifdeffery 2019-10-14 10:55:00 +01:00
syscall.h arm64: compat: Ensure upper 32 bits of x0 are zero on syscall return 2020-07-16 11:41:31 +01:00
sysreg.h arm64/mm: Fix __enable_mmu() for new TGRAN range values 2021-03-10 11:01:57 +00:00
system_misc.h arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00
thread_info.h arm64: make _TIF_WORK_MASK bits contiguous 2020-12-16 14:08:47 -08:00
timex.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
tlb.h arm64: tlb: Set the TTL field in flush_tlb_range 2020-07-07 11:23:47 +01:00
tlbflush.h arm64: use a common .arch preamble for inline assembly 2020-08-28 11:15:15 +01:00
topology.h arm64: wrap and generalise counter read functions 2020-11-13 20:05:10 +00:00
trans_pgd.h arm64: trans_pgd: hibernate: idmap the single page that holds the copy page routines 2021-01-27 15:41:12 +00:00
traps.h arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00
uaccess.h arm64: vmlinux.ld.S: add assertion for reserved_pg_dir offset 2021-02-03 20:43:45 +00:00
unistd32.h fs: add mount_setattr() 2021-01-24 14:42:45 +01:00
unistd.h fs: add mount_setattr() 2021-01-24 14:42:45 +01:00
uprobes.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
vdso.h arm64/vdso: Add time namespace page 2020-07-24 13:15:20 +01:00
vermagic.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
virt.h arm64: Provide an 'upgrade to VHE' stub hypercall 2021-02-08 12:51:26 +00:00
vmalloc.h mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h> 2019-12-10 10:12:55 +01:00
vmap_stack.h mm: reorder includes after introduction of linux/pgtable.h 2020-06-09 09:39:13 -07:00
word-at-a-time.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
xor.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00