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linux-stable/arch/arm64/kernel
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Mark Rutland bc9bbb7880 arm64: Explicitly save/restore CPACR when probing SVE and SME 
When a CPUs onlined we first probe for supported features and
propetites, and then we subsequently enable features that have been
detected. This is a little problematic for SVE and SME, as some
properties (e.g. vector lengths) cannot be probed while they are
disabled. Due to this, the code probing for SVE properties has to enable
SVE for EL1 prior to proving, and the code probing for SME properties
has to enable SME for EL1 prior to probing. We never disable SVE or SME
for EL1 after probing.

It would be a little nicer to transiently enable SVE and SME during
probing, leaving them both disabled unless explicitly enabled, as this
would make it much easier to catch unintentional usage (e.g. when they
are not present system-wide).

This patch reworks the SVE and SME feature probing code to only
transiently enable support at EL1, disabling after probing is complete.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2023-10-16 14:16:53 +01:00
..
pi arm64: unwind: add asynchronous unwind tables to kernel and modules 2022-11-09 18:06:35 +00:00
probes arm64: kprobes: Drop ID map text from kprobes blacklist 2023-02-07 18:25:10 +00:00
vdso arm64: vdso: remove two .altinstructions related symbols 2023-07-27 12:32:43 +01:00
vdso32 kbuild: Drop -Wdeclaration-after-statement 2023-06-26 11:14:19 +02:00
.gitignore
acpi.c arm64: acpi: Fix possible memory leak of ffh_ctxt 2023-02-24 14:21:49 +00:00
acpi_numa.c arm64: numa: Don't check node against MAX_NUMNODES 2022-07-19 19:10:28 +01:00
acpi_parking_protocol.c treewide: Drop function_nocfi 2022-09-26 10:13:14 -07:00
alternative.c Merge branches 'for-next/kpti', 'for-next/missing-proto-warn', 'for-next/iss2-decode', 'for-next/kselftest', 'for-next/misc', 'for-next/feat_mops', 'for-next/module-alloc', 'for-next/sysreg', 'for-next/cpucap', 'for-next/acpi', 'for-next/kdump', 'for-next/acpi-doc', 'for-next/doc' and 'for-next/tpidr2-fix', remote-tracking branch 'arm64/for-next/perf' into for-next/core 2023-06-23 18:32:20 +01:00
armv8_deprecated.c sysctl: Add size to register_sysctl 2023-08-15 15:26:17 -07:00
asm-offsets.c arm64: ftrace: fix build error with CONFIG_FUNCTION_GRAPH_TRACER=n 2023-07-05 09:46:19 -04:00
cacheinfo.c cacheinfo: Add arm64 early level initializer implementation 2023-04-13 09:32:33 +01:00
compat_alignment.c arm64: compat: Work around uninitialized variable warning 2023-04-05 17:51:47 +01:00
cpu-reset.S arm64: kernel: remove SHF_WRITE|SHF_EXECINSTR from .idmap.text 2023-05-02 12:42:22 +01:00
cpu_errata.c arm64: Fixup user features at boot time 2023-10-16 12:57:52 +01:00
cpu_ops.c
cpufeature.c arm64: Explicitly save/restore CPACR when probing SVE and SME 2023-10-16 14:16:53 +01:00
cpuidle.c arm64: Explicitly include correct DT includes 2023-07-31 14:45:38 +01:00
cpuinfo.c arm64: add HWCAP for FEAT_HBC (hinted conditional branches) 2023-08-04 17:32:13 +01:00
crash_core.c arm64: move PAC masks to <asm/pointer_auth.h> 2023-04-13 12:27:11 +01:00
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: kgdb: Set PSTATE.SS to 1 to re-enable single-step 2023-04-14 13:39:47 +01:00
efi-header.S arm64: efi: Enable BTI codegen and add PE/COFF annotation 2023-04-20 15:43:45 +02:00
efi-rt-wrapper.S arm64: efi: Avoid workqueue to check whether EFI runtime is live 2023-01-16 15:27:31 +01:00
efi.c drm for 6.6-rc1 2023-08-30 13:34:34 -07:00
elfcore.c arm64: mte: Avoid the racy walk of the vma list during core dump 2023-01-05 15:12:12 +00:00
entry-common.c arm64: syscall: unmask DAIF earlier for SVCs 2023-08-11 12:23:48 +01:00
entry-fpsimd.S arm64/sme: Implement context switching for ZT0 2023-01-20 12:23:06 +00:00
entry-ftrace.S arm64: ftrace: Enable HAVE_FUNCTION_GRAPH_RETVAL 2023-06-20 18:38:37 -04:00
entry.S arm64: sdei: abort running SDEI handlers during crash 2023-08-04 17:35:33 +01:00
fpsimd.c arm64: Explicitly save/restore CPACR when probing SVE and SME 2023-10-16 14:16:53 +01:00
ftrace.c arm64: module: mandate MODULE_PLTS 2023-06-06 17:39:05 +01:00
head.S arm64/mm: Directly use ID_AA64MMFR2_EL1_VARange_MASK 2023-07-27 11:11:44 +01:00
hibernate-asm.S
hibernate.c arm64: hibernate: remove WARN_ON in save_processor_state 2023-06-21 13:33:49 +01:00
hw_breakpoint.c hw_breakpoint: fix single-stepping when using bpf_overflow_handler 2023-08-18 17:04:09 +01:00
hyp-stub.S ARM64: 2023-07-03 15:32:22 -07:00
idle.c arch/idle: Change arch_cpu_idle() behavior: always exit with IRQs disabled 2023-01-13 11:48:15 +01:00
idreg-override.c arm64/sysreg: Fix broken strncpy() -> strscpy() conversion 2023-09-06 19:22:54 +01:00
image-vars.h efi/zboot: arm64: Inject kernel code size symbol into the zboot payload 2023-04-26 18:01:41 +02:00
image.h
io.c
irq.c Merge branch 'for-next/stacks' into for-next/core 2022-12-06 11:26:40 +00:00
jump_label.c jump_label: make initial NOP patching the special case 2022-06-24 09:48:55 +02:00
kaslr.c Merge branch for-next/module-alloc into kvmarm/next 2023-06-15 13:04:15 +00:00
kexec_image.c arm64: Fix dangling references to Documentation/arm64 2023-06-21 08:53:31 -06:00
kgdb.c arm64: kgdb: Set PSTATE.SS to 1 to re-enable single-step 2023-04-14 13:39:47 +01:00
kuser32.S arm64: Update Documentation/arm references 2023-06-12 06:33:48 -06:00
machine_kexec.c Merge branch 'for-next/misc' into for-next/core 2023-04-20 11:22:09 +01:00
machine_kexec_file.c arm64/kexec: Fix missing extra range for crashkres_low. 2022-09-01 11:50:00 +01:00
Makefile - Arnd Bergmann has fixed a bunch of -Wmissing-prototypes in 2023-06-28 10:59:38 -07:00
module-plts.c arm64: module: Use module_init_layout_section() to spot init sections 2023-08-03 13:42:02 -07:00
module.c arm64: module: rework module VA range selection 2023-06-06 17:39:06 +01:00
mte.c arm64: mte: simplify swap tag restoration logic 2023-08-18 10:12:02 -07:00
paravirt.c arm64: paravirt: remove conduit check in has_pv_steal_clock 2022-11-09 18:11:56 +00:00
patch-scs.c arm64: Apply dynamic shadow call stack patching in two passes 2023-01-26 17:54:15 +00:00
patching.c arm64: patching: Add aarch64_insn_write_literal_u64() 2023-01-24 11:49:43 +00:00
pci.c arm64: Explicitly include correct DT includes 2023-07-31 14:45:38 +01:00
perf_callchain.c arm64: use XPACLRI to strip PAC 2023-04-13 12:27:11 +01:00
perf_regs.c perf: arm64: Add SVE vector granule register to user regs 2022-09-22 15:06:02 +01:00
pointer_auth.c
process.c Objtool changes for v6.4: 2023-04-28 14:02:54 -07:00
proton-pack.c arm64: delete dead code in this_cpu_set_vectors() 2023-04-20 10:44:54 +01:00
psci.c treewide: Drop function_nocfi 2022-09-26 10:13:14 -07:00
ptrace.c arm64 updates for 6.6 2023-08-28 17:34:54 -07:00
reloc_test_core.c ARM64: reloc_test: add __init/__exit annotations to module init/exit funcs 2022-09-29 18:04:25 +01:00
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: sdei: abort running SDEI handlers during crash 2023-08-04 17:35:33 +01:00
setup.c arm64: kaslr: split kaslr/module initialization 2023-06-06 17:39:05 +01:00
signal.c Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
signal32.c x86/shstk: Add user control-protection fault handler 2023-08-02 15:01:50 -07:00
sigreturn32.S arm64: compat: Move sigreturn32.S to .rodata section 2022-07-01 12:05:45 +01:00
sleep.S arm64: kernel: remove SHF_WRITE|SHF_EXECINSTR from .idmap.text 2023-05-02 12:42:22 +01:00
smccc-call.S
smp.c arm64: Rework setup_cpu_features() 2023-10-16 12:57:51 +01:00
smp_spin_table.c treewide: Drop function_nocfi 2022-09-26 10:13:14 -07:00
stacktrace.c arm64: use XPACLRI to strip PAC 2023-04-13 12:27:11 +01:00
suspend.c cpuidle, arm64: Fix the ARM64 cpuidle logic 2023-01-18 12:27:17 +01:00
sys.c
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
syscall.c arm64: syscall: unmask DAIF earlier for SVCs 2023-08-11 12:23:48 +01:00
time.c arm64: Make profile_pc() use arch_stack_walk() 2021-12-10 14:06:04 +00:00
topology.c RISC-V Patches for the 6.1 Merge Window, Part 1 2022-10-09 13:24:01 -07:00
trace-events-emulation.h
traps.c - Yosry Ahmed brought back some cgroup v1 stats in OOM logs. 2023-06-28 10:28:11 -07:00
vdso-wrap.S
vdso.c arm64: vdso: Pass (void *) to virt_to_page() 2023-05-16 14:53:36 +01:00
vdso32-wrap.S
vmlinux.lds.S arm64: lds: move .got section out of .text 2023-05-02 13:12:45 +01:00
watchdog_hld.c arm64: enable perf events based hard lockup detector 2023-06-09 17:44:22 -07:00