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e12310a0d3
linux/arch/arm64/kernel
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Mark Brown e12310a0d3 arm64/sme: Implement ptrace support for streaming mode SVE registers 
The streaming mode SVE registers are represented using the same data
structures as for SVE but since the vector lengths supported and in use
may not be the same as SVE we represent them with a new type NT_ARM_SSVE.
Unfortunately we only have a single 16 bit reserved field available in
the header so there is no space to fit the current and maximum vector
length for both standard and streaming SVE mode without redefining the
structure in a way the creates a complicatd and fragile ABI. Since FFR
is not present in streaming mode it is read and written as zero.

Setting NT_ARM_SSVE registers will put the task into streaming mode,
similarly setting NT_ARM_SVE registers will exit it. Reads that do not
correspond to the current mode of the task will return the header with
no register data. For compatibility reasons on write setting no flag for
the register type will be interpreted as setting SVE registers, though
users can provide no register data as an alternative mechanism for doing
so.

Signed-off-by: Mark Brown <broonie@kernel.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Link: https://lore.kernel.org/r/20220419112247.711548-21-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2022-04-22 18:51:15 +01:00
..
probes arm64: kprobes: Make a frame pointer on __kretprobe_trampoline 2021-10-22 12:16:53 -04:00
vdso arm64: vdso: Fix "no previous prototype" warning 2022-01-24 12:08:28 +00:00
vdso32 Kbuild: move to -std=gnu11 2022-03-13 17:31:37 +09:00
.gitignore
acpi_numa.c arm64, numa: Change the numa init functions name to be generic 2021-01-14 15:08:54 -08:00
acpi_parking_protocol.c arm64: use function_nocfi with __pa_symbol 2021-04-08 16:04:22 -07:00
acpi.c arm64: Simplify checking for populated DT 2021-12-06 16:12:53 +00:00
alternative.c arm64: alternatives: mark patch_alternative() as noinstr 2022-04-06 11:23:48 +01:00
armv8_deprecated.c arm64: extable: add a dedicated uaccess handler 2021-10-21 10:45:22 +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 arm64 updates for 5.18 2022-03-21 10:46:39 -07:00
cpu_ops.c
cpu-reset.S arm64: kexec: remove cpu-reset.h 2021-10-01 13:31:00 +01:00
cpufeature.c arm64/sme: Identify supported SME vector lengths at boot 2022-04-22 18:50:51 +01:00
cpuidle.c cpuidle: PSCI: Move the has_lpi check to the beginning of the function 2022-03-03 20:20:06 +01:00
cpuinfo.c arm64/sme: Identify supported SME vector lengths at boot 2022-04-22 18:50:51 +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 arm64: kdump: update ppos when reading elfcorehdr 2021-03-22 12:46:38 +00:00
debug-monitors.c arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00
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
efi.c arm64: efi: Export screen_info 2021-08-04 16:54:36 +00:00
elfcore.c arm64: mte: Fix the stack frame size warning in mte_dump_tag_range() 2022-04-04 09:59:27 +01:00
entry-common.c arm64/sme: Implement traps and syscall handling for SME 2022-04-22 18:51:05 +01:00
entry-fpsimd.S arm64/sme: Implement ZA context switching 2022-04-22 18:51:02 +01:00
entry-ftrace.S arm64: Use BTI C directly and unconditionally 2021-12-14 18:12:58 +00:00
entry.S Merge branch 'for-next/spectre-bhb' into for-next/core 2022-03-14 19:08:31 +00:00
fpsimd.c arm64/sme: Implement ptrace support for streaming mode SVE registers 2022-04-22 18:51:15 +01:00
ftrace.c arm64: ftrace: use HAVE_FUNCTION_GRAPH_RET_ADDR_PTR 2021-11-16 09:47:54 +00:00
head.S sched: move CPU field back into thread_info if THREAD_INFO_IN_TASK=y 2021-09-30 16:13:10 +02:00
hibernate-asm.S arm64: kexec: install a copy of the linear-map 2021-10-01 13:31:00 +01:00
hibernate.c arm64: Drop outdated links in comments 2022-01-05 11:51:01 +00:00
hw_breakpoint.c arm64: fix typos in comments 2022-04-04 10:32:50 +01:00
hyp-stub.S Merge remote-tracking branch 'arm64/for-next/vhe-only' into kvmarm-master/next 2021-04-13 15:42:40 +01:00
idle.c Merge branch 'for-next/entry' into for-next/core 2021-06-24 14:01:55 +01:00
idreg-override.c arm64: Add support of PAuth QARMA3 architected algorithm 2022-02-25 13:38:52 +00:00
image-vars.h ARM: 2022-03-24 11:58:57 -07:00
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: fix the doc of RANDOMIZE_MODULE_REGION_FULL 2021-08-03 10:36:42 +01:00
kexec_image.c arm64: kexec_file: Fix sparse warning 2020-11-10 13:11:44 +00:00
kgdb.c arm64: insn: decouple patching from insn code 2021-06-11 11:19:27 +01:00
kuser32.S
machine_kexec_file.c arm64: kexec: Fix missing error code 'ret' warning in load_other_segments() 2021-12-16 17:44:58 +00:00
machine_kexec.c Merge branches 'for-next/misc', 'for-next/cache-ops-dzp', 'for-next/stacktrace', 'for-next/xor-neon', 'for-next/kasan', 'for-next/armv8_7-fp', 'for-next/atomics', 'for-next/bti', 'for-next/sve', 'for-next/kselftest' and 'for-next/kcsan', remote-tracking branch 'arm64/for-next/perf' into for-next/core 2022-01-05 18:14:32 +00:00
Makefile arm64: mte: Dump the MTE tags in the core file 2022-02-15 22:53:29 +00:00
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/mte: Remove asymmetric mode from the prctl() interface 2022-03-09 18:14:56 +00:00
paravirt.c x86/paravirt: Switch time pvops functions to use static_call() 2021-03-11 16:17:52 +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 arm64/sme: Implement traps and syscall handling for SME 2022-04-22 18:51:05 +01:00
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: Implement ptrace support for streaming mode SVE registers 2022-04-22 18:51:15 +01:00
reloc_test_core.c
reloc_test_syms.S
relocate_kernel.S arm64: kexec: keep MMU enabled during kexec relocation 2021-10-01 13:31:00 +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 drivers/base/node: consolidate node device subsystem initialization in node_dev_init() 2022-03-22 15:57:10 -07:00
signal32.c arm64 updates for 5.15: 2021-09-01 15:04:29 -07:00
signal.c arm64/sme: Implement ZA signal handling 2022-04-22 18:51:13 +01:00
sigreturn32.S
sleep.S kasan: remove redundant config option 2021-04-16 16:10:36 -07:00
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 arch/arm64: Fix topology initialization for core scheduling 2022-04-04 10:24:22 +01:00
stacktrace.c arm64: Mark start_backtrace() notrace and NOKPROBE_SYMBOL 2022-01-24 14:25:20 +00:00
suspend.c arm64: fix typos in comments 2022-04-04 10:32:50 +01:00
sys32.c
sys_compat.c arm64: drop unused includes of <linux/personality.h> 2022-03-08 10:23:42 +00:00
sys.c
syscall.c arm64/sme: Implement traps and syscall handling for SME 2022-04-22 18:51:05 +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/sme: System register and exception syndrome definitions 2022-04-22 18:50:43 +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 arm64: entry: Allow the trampoline text to occupy multiple pages 2022-02-15 17:40:28 +00:00