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linux/arch/arm64/kernel
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Marc Zyngier 892f7237b3 arm64: Delay initialisation of cpuinfo_arm64::reg_{zcr,smcr} 
Even if we are now able to tell the kernel to avoid exposing SVE/SME
from the command line, we still have a couple of places where we
unconditionally access the ZCR_EL1 (resp. SMCR_EL1) registers.

On systems with broken firmwares, this results in a crash even if
arm64.nosve (resp. arm64.nosme) was passed on the command-line.

To avoid this, only update cpuinfo_arm64::reg_{zcr,smcr} once
we have computed the sanitised version for the corresponding
feature registers (ID_AA64PFR0 for SVE, and ID_AA64PFR1 for
SME). This results in some minor refactoring.

Reviewed-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Peter Collingbourne <pcc@google.com>
Tested-by: Peter Collingbourne <pcc@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220720105219.1755096-1-maz@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
2022-07-25 11:02:11 +01:00
..
pi
arm64: head: avoid relocating the kernel twice for KASLR
2022-06-24 17:18:11 +01:00
probes
arm64: Treat ESR_ELx as a 64-bit register
2022-04-29 19:26:27 +01:00
vdso
arm64: vdso*: place got/plt sections in .rodata
2022-06-28 17:41:44 +01:00
vdso32
arm64: vdso32: Add DWARF_DEBUG
2022-07-01 12:07:43 +01:00
.gitignore
…
acpi_numa.c
arm64: numa: Don't check node against MAX_NUMNODES
2022-07-19 19:10:28 +01:00
acpi_parking_protocol.c
arm64: use function_nocfi with __pa_symbol
2021-04-08 16:04:22 -07:00
acpi.c
arm64: mm: Convert to GENERIC_IOREMAP
2022-06-27 12:22:31 +01:00
alternative.c
arm64/sysreg: Standardise naming for CTR_EL0 fields
2022-07-05 11:45:45 +01:00
armv8_deprecated.c
arm64: fix oops in concurrently setting insn_emulation sysctls
2022-07-04 12:18:47 +01:00
asm-offsets.c
KVM: arm64: Drop unused workaround_flags vcpu field
2021-12-08 14:54:07 +00:00
cacheinfo.c
drivers: base: cacheinfo: Get rid of DEFINE_SMP_CALL_CACHE_FUNCTION()
2021-09-01 10:29:10 +02:00
cpu_errata.c
Merge branch 'for-next/sysregs' into for-next/core
2022-07-25 10:57:37 +01:00
cpu_ops.c
…
cpu-reset.S
arm64: kexec: remove cpu-reset.h
2021-10-01 13:31:00 +01:00
cpufeature.c
arm64: Delay initialisation of cpuinfo_arm64::reg_{zcr,smcr}
2022-07-25 11:02:11 +01:00
cpuidle.c
arm64: cpuidle: remove generic cpuidle support
2022-06-23 14:19:33 +01:00
cpuinfo.c
arm64: Delay initialisation of cpuinfo_arm64::reg_{zcr,smcr}
2022-07-25 11:02:11 +01:00
crash_core.c
arm64: crash_core: Export MODULES, VMALLOC, and VMEMMAP ranges
2022-03-07 21:25:47 +00:00
crash_dump.c
vmcore: convert copy_oldmem_page() to take an iov_iter
2022-04-29 14:37:59 -07:00
debug-monitors.c
arm64: Treat ESR_ELx as a 64-bit register
2022-04-29 19:26:27 +01:00
efi-entry.S
arm64: Rename arm64-internal cache maintenance functions
2021-05-25 19:27:49 +01:00
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
arm64: efi: Export screen_info
2021-08-04 16:54:36 +00:00
elfcore.c
elf: Fix the arm64 MTE ELF segment name and value
2022-04-28 11:37:06 +01:00
entry-common.c
Locking changes in this cycle were:
2022-05-24 10:18:23 -07:00
entry-fpsimd.S
arm64/sme: Implement ZA context switching
2022-04-22 18:51:02 +01:00
entry-ftrace.S
arm64: ftrace: remove redundant label
2022-06-15 16:14:47 +01:00
entry.S
arm64: entry: simplify trampoline data page
2022-06-24 13:08:30 +01:00
fpsimd.c
arm64/fpsimd: Remove duplicate SYS_SVCR read
2022-06-29 10:29:30 +01:00
ftrace.c
arm64: ftrace: consistently handle PLTs.
2022-06-15 16:14:47 +01:00
head.S
arm64: fix KASAN_INLINE
2022-07-20 16:08:10 +01:00
hibernate-asm.S
arm64: kexec: install a copy of the linear-map
2021-10-01 13:31:00 +01:00
hibernate.c
arm64: kasan: Revert "arm64: mte: reset the page tag in page->flags"
2022-07-07 10:48:37 +01:00
hw_breakpoint.c
arm64: Treat ESR_ELx as a 64-bit register
2022-04-29 19:26:27 +01:00
hyp-stub.S
Merge branch 'for-next/boot' into for-next/core
2022-07-25 10:59:15 +01:00
idle.c
Merge branch 'for-next/entry' into for-next/core
2021-06-24 14:01:55 +01:00
idreg-override.c
Merge branch 'for-next/boot' into for-next/core
2022-07-25 10:59:15 +01:00
image-vars.h
arm64: lds: use PROVIDE instead of conditional definitions
2022-06-29 10:21:23 +01:00
image.h
arm64: get rid of TEXT_OFFSET
2020-09-07 15:00:52 +01:00
io.c
…
irq.c
arm64: irq: allow FIQs to be handled
2021-03-24 20:19:30 +00:00
jump_label.c
arm64: insn: decouple patching from insn code
2021-06-11 11:19:27 +01:00
kaslr.c
arm64: head: avoid relocating the kernel twice for KASLR
2022-06-24 17:18:11 +01:00
kexec_image.c
arm64: kexec_file: Fix sparse warning
2020-11-10 13:11:44 +00:00
kgdb.c
arm64: Treat ESR_ELx as a 64-bit register
2022-04-29 19:26:27 +01:00
kuser32.S
arm64: compat: Move kuser32.S to .rodata section
2022-06-23 16:01:42 +01:00
machine_kexec_file.c
arm64: kdump: Reimplement crashkernel=X
2022-05-07 19:54:33 +01:00
machine_kexec.c
arm64: kdump: Reimplement crashkernel=X
2022-05-07 19:54:33 +01:00
Makefile
Merge branch 'for-next/boot' into for-next/core
2022-07-25 10:59:15 +01:00
module-plts.c
arm64: fix typos in comments
2022-04-04 10:32:50 +01:00
module.c
kasan, arm64: don't tag executable vmalloc allocations
2022-03-24 19:06:48 -07:00
mte.c
arm64: kasan: Revert "arm64: mte: reset the page tag in page->flags"
2022-07-07 10:48:37 +01:00
paravirt.c
arm64: paravirt: Use RCU read locks to guard stolen_time
2022-05-17 14:23:37 +01:00
patching.c
arm64: patch_text: Fixup last cpu should be master
2022-04-08 11:43:46 +01:00
pci.c
arm64: PCI: Support root bridge preparation for Hyper-V
2021-08-23 10:59:26 +01:00
perf_callchain.c
Peter Zijlstra says:
2022-01-12 16:26:58 -08:00
perf_event.c
arm64: perf: Expose some Armv9 common events under sysfs
2022-03-08 11:40:44 +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: move preemption disablement to prctl handlers
2021-07-28 18:33:49 +01:00
process.c
This set of changes updates init and user mode helper tasks to be
2022-06-03 16:03:05 -07:00
proton-pack.c
arm64: Add part number for Arm Cortex-A78AE
2022-04-08 11:46:46 +01:00
psci.c
arm64: use function_nocfi with __pa_symbol
2021-04-08 16:04:22 -07:00
ptrace.c
arm64/sme: Remove _EL0 from name of SVCR - FIXME sysreg.h
2022-05-16 19:50:20 +01:00
reloc_test_core.c
…
reloc_test_syms.S
…
relocate_kernel.S
arm64: kexec: load from kimage prior to clobbering
2022-05-17 14:25:35 +01:00
return_address.c
arm64: Make return_address() use arch_stack_walk()
2021-12-10 14:06:04 +00:00
sdei.c
arm64: kernel: add helper for booted at EL2 and not VHE
2021-10-01 13:30:59 +01:00
setup.c
arm64: fix KASAN_INLINE
2022-07-20 16:08:10 +01:00
signal32.c
signal: Deliver SIGTRAP on perf event asynchronously if blocked
2022-04-22 12:14:05 +02:00
signal.c
arm64/signal: Clean up SVE/SME feature checking inconsistency
2022-06-27 10:28:12 +01:00
sigreturn32.S
arm64: compat: Move sigreturn32.S to .rodata section
2022-07-01 12:05:45 +01:00
sleep.S
arm64: Rename the VHE switch to "finalise_el2"
2022-07-01 15:22:51 +01:00
smccc-call.S
arm64: smccc: Save lr before calling __arm_smccc_sve_check()
2021-07-21 11:23:25 +01:00
smp_spin_table.c
arm64: Rename arm64-internal cache maintenance functions
2021-05-25 19:27:49 +01:00
smp.c
cpufreq: CPPC: Add per_cpu efficiency_class
2022-05-06 21:01:17 +02:00
stacktrace.c
arm64: Copy the task argument to unwind_state
2022-06-27 10:51:34 +01:00
suspend.c
arm64: mm: provide idmap pointer to cpu_replace_ttbr1()
2022-06-24 17:18:10 +01:00
sys32.c
…
sys_compat.c
arm64: compat: Do not treat syscall number as ESR_ELx for a bad syscall
2022-04-29 19:26:27 +01:00
sys.c
…
syscall.c
arm64/sme: Remove _EL0 from name of SVCR - FIXME sysreg.h
2022-05-16 19:50:20 +01:00
time.c
arm64: Make profile_pc() use arch_stack_walk()
2021-12-10 14:06:04 +00:00
topology.c
topology: Represent clusters of CPUs within a die
2021-10-15 11:25:15 +02:00
trace-events-emulation.h
…
traps.c
arm64/sysreg: Standardise naming for CTR_EL0 fields
2022-07-05 11:45:45 +01:00
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
Merge branches 'for-next/misc', 'for-next/kselftest', 'for-next/xntable', 'for-next/vdso', 'for-next/fiq', 'for-next/epan', 'for-next/kasan-vmalloc', 'for-next/fgt-boot-init', 'for-next/vhe-only' and 'for-next/neon-softirqs-disabled', remote-tracking branch 'arm64/for-next/perf' into for-next/core
2021-04-15 14:00:38 +01:00
vmlinux.lds.S
Merge branch 'for-next/boot' into for-next/core
2022-07-25 10:59:15 +01:00