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52c9f93a9c
linux/arch/arm64/include/asm
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Nathan Chancellor 52c9f93a9c arm64: Do not include __READ_ONCE() block in assembly files 
When building arm64 defconfig + CONFIG_LTO_CLANG_{FULL,THIN}=y after
commit 558c303c97 ("arm64: Mitigate spectre style branch history side
channels"), the following error occurs:

  <instantiation>:4:2: error: invalid fixup for movz/movk instruction
   mov w0, #ARM_SMCCC_ARCH_WORKAROUND_3
   ^

Marc figured out that moving "#include <linux/init.h>" in
include/linux/arm-smccc.h into a !__ASSEMBLY__ block resolves it. The
full include chain with CONFIG_LTO=y from include/linux/arm-smccc.h:

include/linux/init.h
include/linux/compiler.h
arch/arm64/include/asm/rwonce.h
arch/arm64/include/asm/alternative-macros.h
arch/arm64/include/asm/assembler.h

The asm/alternative-macros.h include in asm/rwonce.h only happens when
CONFIG_LTO is set, which ultimately casues asm/assembler.h to be
included before the definition of ARM_SMCCC_ARCH_WORKAROUND_3. As a
result, the preprocessor does not expand ARM_SMCCC_ARCH_WORKAROUND_3 in
__mitigate_spectre_bhb_fw, which results in the error above.

Avoid this problem by just avoiding the CONFIG_LTO=y __READ_ONCE() block
in asm/rwonce.h with assembly files, as nothing in that block is useful
to assembly files, which allows ARM_SMCCC_ARCH_WORKAROUND_3 to be
properly expanded with CONFIG_LTO=y builds.

Fixes: e35123d83e ("arm64: lto: Strengthen READ_ONCE() to acquire when CONFIG_LTO=y")
Cc: <stable@vger.kernel.org> # 5.11.x
Link: https://lore.kernel.org/r/20220309155716.3988480-1-maz@kernel.org/
Reported-by: Marc Zyngier <maz@kernel.org>
Acked-by: James Morse <james.morse@arm.com>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/20220309191633.2307110-1-nathan@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-03-09 21:56:50 +00:00
..
vdso arm64: vdso32: drop test for -march=armv8-a 2021-10-21 10:31:38 +01:00
xen xen/arm: introduce XENFEAT_direct_mapped and XENFEAT_not_direct_mapped 2021-04-23 11:33:50 +02:00
acenv.h
acpi.h Revert "ACPI: Add memory semantics to acpi_os_map_memory()" 2021-09-23 20:39:36 +02:00
alternative-macros.h Merge branch 'for-next/insn' into for-next/core 2021-06-24 14:03:24 +01:00
alternative.h arm64: alternatives: Split up alternative.h 2020-11-09 21:49:34 +00:00
arch_gicv3.h arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
arch_timer.h arm64: Add CNT{P,V}CTSS_EL0 alternatives to cnt{p,v}ct_el0 2021-10-19 10:56:20 +01:00
archrandom.h arm64: Add support for SMCCC TRNG entropy source 2021-01-21 17:42:46 +00:00
arm_dsu_pmu.h
arm-cci.h
asm_pointer_auth.h arm64: Conditionally configure PTR_AUTH key of the kernel. 2021-06-15 11:32:31 +01:00
asm-bug.h
asm-extable.h arm64: extable: add load_unaligned_zeropad() handler 2021-10-21 10:45:22 +01:00
asm-offsets.h
asm-prototypes.h kasan: arm64: support specialized outlined tag mismatch checks 2021-05-26 23:31:26 +01:00
asm-uaccess.h arm64: extable: consolidate definitions 2021-10-21 10:45:22 +01:00
assembler.h arm64: Use the clearbhb instruction in mitigations 2022-02-24 14:02:44 +00:00
atomic_ll_sc.h arm64: atomics: format whitespace consistently 2021-12-14 13:00:23 +00:00
atomic_lse.h arm64: atomics: lse: Dereference matching size 2022-01-20 09:13:48 +00:00
atomic.h locking/atomic: make ARCH_ATOMIC a Kconfig symbol 2021-05-26 13:20:49 +02:00
barrier.h asm-generic: introduce io_stop_wc() and add implementation for ARM64 2021-12-22 10:44:53 +00:00
bitops.h include: move find.h from asm_generic to linux 2022-01-15 08:47:31 -08:00
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
cache.h Revert "arm64: cache: Lower ARCH_DMA_MINALIGN to 64 (L1_CACHE_BYTES)" 2021-07-12 13:37:34 +01:00
cacheflush.h set_memory: allow querying whether set_direct_map_*() is actually enabled 2021-07-08 11:48:20 -07:00
checksum.h arm64: csum: cast to the proper type 2021-03-15 10:57:21 +00:00
clocksource.h
cmpxchg.h arm64: atomics: lse: Dereference matching size 2022-01-20 09:13:48 +00:00
compat.h arch: remove compat_alloc_user_space 2021-09-08 15:32:35 -07:00
compiler.h CFI: Move function_nocfi() into compiler.h 2021-06-14 09:12:09 -07:00
cpu_ops.h arm64: fix some spelling mistakes in the comments by codespell 2020-09-07 14:18:50 +01:00
cpu.h arm64: add ID_AA64ISAR2_EL1 sys register 2021-12-13 18:53:00 +00:00
cpufeature.h arm64: Use the clearbhb instruction in mitigations 2022-02-24 14:02:44 +00:00
cpuidle.h arm64: Add cpuidle context save/restore helpers 2021-06-17 18:00:39 +01:00
cputype.h arm64: Mitigate spectre style branch history side channels 2022-02-24 13:58:52 +00:00
current.h
daifflags.h arm64: entry: always set GIC_PRIO_PSR_I_SET during entry 2021-05-05 18:13:58 +01:00
dcc.h
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: Move efifb_setup_from_dmi() prototype from arch headers 2021-12-13 15:07:16 +01:00
el2_setup.h arm64 updates for 5.15: 2021-09-01 15:04:29 -07:00
elf.h arm64: exec: Adjust affinity for compat tasks with mismatched 32-bit EL0 2021-08-20 12:33:06 +02:00
esr.h KVM/arm64 fixes for 5.16, take #1 2021-11-12 16:01:55 -05:00
exception.h arm64: entry: move bulk of ret_to_user to C 2021-08-05 14:09:49 +01:00
exec.h arm64: uaccess: remove set_fs() 2020-12-02 19:49:11 +00:00
extable.h arm64/bpf: Remove 128MB limit for BPF JIT programs 2021-11-08 22:16:26 +01:00
fb.h
fixmap.h arm64: entry: Allow the trampoline text to occupy multiple pages 2022-02-15 17:40:28 +00:00
fpsimd.h arm64/sve: Generalise vector length configuration prctl() for SME 2021-12-14 18:33:44 +00:00
fpsimdmacros.h arm64/sve: Explicitly load vector length when restoring SVE state 2021-10-21 10:18:17 +01:00
ftrace.h arm64: ftrace: use HAVE_FUNCTION_GRAPH_RET_ADDR_PTR 2021-11-16 09:47:54 +00:00
futex.h arm64: extable: add a dedicated uaccess handler 2021-10-21 10:45:22 +01:00
gpr-num.h arm64: gpr-num: support W registers 2021-10-21 10:45:22 +01:00
hardirq.h arm64: irqstat: Get rid of duplicated declaration 2020-11-23 10:31:05 +01:00
hugetlb.h mm/hugetlb: change parameters of arch_make_huge_pte() 2021-06-30 20:47:26 -07:00
hw_breakpoint.h
hwcap.h arm64: cpufeature: add HWCAP for FEAT_RPRES 2021-12-13 18:53:00 +00:00
hyp_image.h KVM: arm64: Allow using kvm_nvhe_sym() in hyp code 2021-03-19 12:01:20 +00:00
hyperv-tlfs.h PCI: hv: Add arm64 Hyper-V vPCI support 2022-01-12 08:24:29 -06:00
hypervisor.h arm/arm64: Probe for the presence of KVM hypervisor 2021-03-31 09:16:55 +01:00
image.h
insn-def.h arm64: insn: avoid circular include dependency 2021-06-21 11:58:03 +01:00
insn.h arm64: Use the clearbhb instruction in mitigations 2022-02-24 14:02:44 +00:00
io.h asm-generic/io.h: implement pci_remap_cfgspace using ioremap_np 2021-04-08 20:18:38 +09:00
irq_work.h arm64: smp: Add missing prototype for some smp.c functions 2021-03-29 10:41:42 +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
kasan.h arm64: kasan: simplify and inline MTE functions 2021-02-26 09:41:03 -08:00
Kbuild set_memory: allow querying whether set_direct_map_*() is actually enabled 2021-07-08 11:48:20 -07:00
kernel-pgtable.h arm64: head: avoid over-mapping in map_memory 2021-08-24 16:44:23 +01:00
kexec.h arm64: kexec: remove cpu-reset.h 2021-10-01 13:31:00 +01:00
kfence.h set_memory: allow querying whether set_direct_map_*() is actually enabled 2021-07-08 11:48:20 -07:00
kgdb.h
kprobes.h kprobes: treewide: Make it harder to refer kretprobe_trampoline directly 2021-09-30 21:24:06 -04:00
kvm_arm.h KVM: arm64: Avoid setting the upper 32 bits of TCR_EL2 and CPTR_EL2 to 1 2021-11-25 15:51:25 +00:00
kvm_asm.h KVM: arm64: Expose unshare hypercall to the host 2021-12-16 12:58:57 +00:00
kvm_emulate.h KVM/arm64 updates for Linux 5.16 2022-01-07 10:42:19 -05:00
kvm_host.h KVM: arm64: Allow indirect vectors to be used without SPECTRE_V3A 2022-02-15 17:38:25 +00:00
kvm_hyp.h KVM: arm64: Remove unused __sve_save_state 2021-11-22 16:01:39 +00:00
kvm_mmu.h KVM: arm64: pkvm: Unshare guest structs during teardown 2021-12-16 12:58:57 +00:00
kvm_mte.h KVM: arm64: Save/restore MTE registers 2021-06-22 14:08:05 +01:00
kvm_pgtable.h Merge branch kvm-arm64/misc-5.17 into kvmarm-master/next 2022-01-04 17:16:15 +00:00
kvm_pkvm.h KVM: arm64: Move host EL1 code out of hyp/ directory 2021-12-06 08:37:03 +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
kvm_types.h KVM: arm64: Use common KVM implementation of MMU memory caches 2020-07-09 13:29:43 -04:00
linkage.h arm64: Ensure that the 'bti' macro is defined where linkage.h is included 2021-12-17 16:20:45 +00:00
lse.h
memory.h arm64/bpf: Remove 128MB limit for BPF JIT programs 2021-11-08 22:16:26 +01:00
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: hibernate: abstract ttrb0 setup function 2021-10-01 13:30:59 +01:00
mmu.h arm64: Add missing include of asm/cpufeature.h to asm/mmu.h 2021-12-06 08:37:03 +00:00
mmzone.h
module.h
module.lds.h kasan: arm64: support specialized outlined tag mismatch checks 2021-05-26 23:31:26 +01:00
mshyperv.h arm64: hyperv: Add Hyper-V hypercall and register access utilities 2021-08-04 16:54:36 +00:00
mte-def.h KVM: arm64: Add ioctl to fetch/store tags in a guest 2021-06-22 14:08:06 +01:00
mte-kasan.h arm64: mte: DC {GVA,GZVA} shouldn't be used when DCZID_EL0.DZP == 1 2021-12-06 17:02:10 +00:00
mte.h arm64: mte: Add asymmetric mode support 2021-10-07 09:30:24 +01:00
neon-intrinsics.h
neon.h
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/mm: drop HAVE_ARCH_PFN_VALID 2021-10-01 14:54:45 +01:00
paravirt.h x86/paravirt: Switch time pvops functions to use static_call() 2021-03-11 16:17:52 +01:00
patching.h arm64: insn: decouple patching from insn code 2021-06-11 11:19:27 +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 more support on caps under sysfs 2021-06-03 09:53:17 +01:00
pgalloc.h arm64: mm: Fix VM_BUG_ON(mm != &init_mm) for trans_pgd 2021-11-16 10:12:57 +00:00
pgtable-hwdef.h arm64/mm: Drop SECTION_[SHIFT|SIZE|MASK] 2021-06-15 12:08:39 +01:00
pgtable-prot.h arm64: mm: Remove unused support for Normal-WT memory type 2021-06-01 18:53:53 +01:00
pgtable-types.h arm64: add support for folded p4d page tables 2020-06-04 19:06:21 -07:00
pgtable.h arm64: pgtable: make __pte_to_phys/__phys_to_pte_val inline functions 2021-11-08 10:05:54 +00:00
pointer_auth.h arm64: move preemption disablement to prctl handlers 2021-07-28 18:33:49 +01:00
preempt.h sched/core: Initialize the idle task with preemption disabled 2021-05-12 13:01:45 +02:00
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
processor.h arm64 updates for 5.16 2021-11-01 16:33:53 -07:00
ptdump.h arm64: Add __init section marker to some functions 2021-04-08 17:45:10 +01:00
ptrace.h arm64: fix compat syscall return truncation 2021-08-03 10:35:03 +01:00
pvclock-abi.h
rwonce.h arm64: Do not include __READ_ONCE() block in assembly files 2022-03-09 21:56:50 +00:00
scs.h arm64: scs: Drop unused 'tmp' argument to scs_{load, save} asm macros 2021-05-27 17:55:33 +01:00
sdei.h Merge branch 'for-next/entry' into for-next/core 2021-06-24 14:01:55 +01:00
seccomp.h arm64: Enable seccomp architecture tracking 2020-11-20 11:16:34 -08:00
sections.h arm64: entry: Allow the trampoline text to occupy multiple pages 2022-02-15 17:40:28 +00:00
set_memory.h set_memory: allow querying whether set_direct_map_*() is actually enabled 2021-07-08 11:48:20 -07:00
setup.h arm64: asm: setup.h: export common variables 2021-10-12 09:22:33 +01:00
shmparam.h
signal32.h
signal.h arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00
simd.h arm64: replace in_irq() with in_hardirq() 2021-08-20 19:49:38 +01:00
smp_plat.h arm64: Add missing header <asm/smp.h> in two files 2021-07-12 13:37:34 +01:00
smp.h arm64: smp: remove stack from secondary_data 2021-05-26 22:45:46 +01:00
sparsemem.h arm64: Force SPARSEMEM_VMEMMAP as the only memory management model 2021-04-23 14:18:21 +01:00
spectre.h arm64: Mitigate spectre style branch history side channels 2022-02-24 13:58:52 +00:00
spinlock_types.h locking: Allow to include asm/spinlock_types.h from linux/spinlock_types_raw.h 2021-12-07 15:14:12 +01:00
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: Make some stacktrace functions private 2021-12-10 14:06:04 +00:00
stage2_pgtable.h KVM: arm64: Remove unused page-table code 2020-09-11 15:51:15 +01:00
stat.h
string.h arm64: Mitigate MTE issues with str{n}cmp() 2021-09-21 14:50:19 +01:00
suspend.h
sync_bitops.h
syscall_wrapper.h
syscall.h arch: remove unused function syscall_set_arguments() 2021-09-14 16:06:20 +02:00
sysreg.h arm64: Use the clearbhb instruction in mitigations 2022-02-24 14:02:44 +00:00
system_misc.h ARM: 9095/1: ARM64: Remove arm_pm_restart() 2021-06-13 18:16:47 +01:00
thread_info.h cpu-to-thread_info update for v5.16-rc1 2021-11-01 17:00:05 -07:00
timex.h
tlb.h arm64: tlb: fix the TTL value of tlb_get_level 2021-06-23 14:52:57 +01:00
tlbflush.h arm64: mm: Fix TLBI vs ASID rollover 2021-08-06 13:52:03 +01:00
topology.h arch_topology: Remove unused topology_set_thermal_pressure() and related 2021-11-23 15:10:26 +05:30
trans_pgd.h arm64: trans_pgd: remove trans_pgd_map_page() 2021-10-01 13:31:01 +01:00
traps.h arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00
uaccess.h arm64: uaccess: avoid blocking within critical sections 2021-11-24 09:16:26 +00:00
unistd32.h mm/mempolicy: wire up syscall set_mempolicy_home_node 2022-01-15 16:30:30 +02:00
unistd.h mm/mempolicy: wire up syscall set_mempolicy_home_node 2022-01-15 16:30:30 +02:00
uprobes.h
vdso.h arm64/vdso: Add time namespace page 2020-07-24 13:15:20 +01:00
vectors.h arm64: Use the clearbhb instruction in mitigations 2022-02-24 14:02:44 +00:00
vermagic.h
virt.h arm64: trans_pgd: hibernate: Add trans_pgd_copy_el2_vectors 2021-10-01 13:30:59 +01:00
vmalloc.h arm64/mm: Add pud_sect_supported() 2021-09-29 16:54:33 +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 arm64: extable: add load_unaligned_zeropad() handler 2021-10-21 10:45:22 +01:00
xor.h