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4c4dcd3541
linux/arch/arm64/include/asm
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Ard Biesheuvel 4c4dcd3541 arm64: assembler: introduce wxN aliases for wN registers 
The AArch64 asm syntax has this slightly tedious property that the names
used in mnemonics to refer to registers depend on whether the opcode in
question targets the entire 64-bits (xN), or only the least significant
8, 16 or 32 bits (wN). When writing parameterized code such as macros,
this can be annoying, as macro arguments don't lend themselves to
indexed lookups, and so generating a reference to wN in a macro that
receives xN as an argument is problematic.

For instance, an upcoming patch that modifies the implementation of the
cond_yield macro to be able to refer to 32-bit registers would need to
modify invocations such as

  cond_yield	3f, x8

to

  cond_yield	3f, 8

so that the second argument can be token pasted after x or w to emit the
correct register reference. Unfortunately, this interferes with the self
documenting nature of the first example, where the second argument is
obviously a register, whereas in the second example, one would need to
go and look at the code to find out what '8' means.

So let's fix this by defining wxN aliases for all xN registers, which
resolve to the 32-bit alias of each respective 64-bit register. This
allows the macro implementation to paste the xN reference after a w to
obtain the correct register name.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20210302090118.30666-3-ardb@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2021-04-12 11:55:33 +01:00
..
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
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 irqchip/gic-v3: Support pseudo-NMIs when SCR_EL3.FIQ == 0 2020-09-13 17:52:04 +01:00
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
arm-cci.h
asm_pointer_auth.h
asm-bug.h
asm-offsets.h
asm-prototypes.h
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: assembler: introduce wxN aliases for wN registers 2021-04-12 11:55:33 +01:00
atomic_ll_sc.h
atomic_lse.h
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
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 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
cmpxchg.h
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: entry: fix non-NMI kernel<->kernel transitions 2020-11-30 12:11:38 +00:00
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: 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
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
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
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
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
irqflags.h arm64: Implement arch_irqs_disabled() 2020-08-26 12:41:55 +02:00
jump_label.h
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
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
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
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
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
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: mte: Add PROT_MTE support to mmap() and mprotect() 2020-09-04 12:46:07 +01:00
paravirt.h
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
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: Remove arm64_dma32_phys_limit and its uses 2021-01-12 17:49:25 +00:00
ptdump.h
ptrace.h Merge branch 'kvm-master' into kvm-next 2021-01-07 18:06:52 -05:00
pvclock-abi.h
rwonce.h arm64: lto: Strengthen READ_ONCE() to acquire when CONFIG_LTO=y 2020-11-09 21:49:34 +00:00
scs.h
sdei.h
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
signal32.h
signal.h arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00
simd.h
smp_plat.h
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
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
string.h kasan, arm64: expand CONFIG_KASAN checks 2020-12-22 12:55:08 -08:00
suspend.h
sync_bitops.h
syscall_wrapper.h
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
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
vdso.h arm64/vdso: Add time namespace page 2020-07-24 13:15:20 +01:00
vermagic.h
virt.h arm64: Provide an 'upgrade to VHE' stub hypercall 2021-02-08 12:51:26 +00:00
vmalloc.h
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
xor.h