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James Morse 228a26b912 arm64: Use the clearbhb instruction in mitigations 
Future CPUs may implement a clearbhb instruction that is sufficient
to mitigate SpectreBHB. CPUs that implement this instruction, but
not CSV2.3 must be affected by Spectre-BHB.

Add support to use this instruction as the BHB mitigation on CPUs
that support it. The instruction is in the hint space, so it will
be treated by a NOP as older CPUs.

Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: James Morse <james.morse@arm.com>
2022-02-24 14:02:44 +00:00
..
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
arm64: vdso: remove -nostdlib compiler flag
2021-11-08 10:02:57 +00:00
.gitignore
.gitignore: add SPDX License Identifier
2020-03-25 11:50:48 +01:00
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: Rename arm64-internal cache maintenance functions
2021-05-25 19:27:49 +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: Mitigate spectre style branch history side channels
2022-02-24 13:58:52 +00:00
cpu_ops.c
arm64: Introduce get_cpu_ops() helper function
2020-03-24 17:24:19 +00:00
cpu-reset.S
arm64: kexec: remove cpu-reset.h
2021-10-01 13:31:00 +01:00
cpufeature.c
arm64: Use the clearbhb instruction in mitigations
2022-02-24 14:02:44 +00:00
cpuidle.c
arm64: kernel: Update the stale comment
2021-05-06 12:26:26 +01:00
cpuinfo.c
arm64: cpufeature: add HWCAP for FEAT_RPRES
2021-12-13 18:53:00 +00:00
crash_core.c
arm64/crash_core: Export TCR_EL1.T1SZ in vmcoreinfo
2020-07-02 17:56:49 +01:00
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
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
entry-common.c
arm64: Snapshot thread flags
2021-12-01 00:06:44 +01:00
entry-fpsimd.S
arm64/sve: Explicitly load vector length when restoring SVE state
2021-10-21 10:18:17 +01:00
entry-ftrace.S
arm64: Use BTI C directly and unconditionally
2021-12-14 18:12:58 +00:00
entry.S
arm64: Use the clearbhb instruction in mitigations
2022-02-24 14:02:44 +00:00
fpsimd.c
RISCV:
2022-01-16 16:15:14 +02:00
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
treewide: Use fallthrough pseudo-keyword
2020-08-23 17:36:59 -05:00
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/cpufeature: Optionally disable MTE via command-line
2021-08-03 15:48:01 +01:00
image-vars.h
arm64: Use the clearbhb instruction in mitigations
2022-02-24 14:02:44 +00:00
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
docs: arm: convert docs to ReST and rename to *.rst
2019-07-15 09:20:24 -03:00
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
kbuild: use more subdir- for visiting subdirectories while cleaning
2021-10-24 13:49:46 +09:00
module-plts.c
arm64: improve whitespace
2021-02-04 13:59:49 +00:00
module.c
mm: defer kmemleak object creation of module_alloc()
2022-01-15 16:30:25 +02:00
mte.c
arm64: mte: Add asymmetric mode support
2021-10-07 09:30:24 +01:00
paravirt.c
x86/paravirt: Switch time pvops functions to use static_call()
2021-03-11 16:17:52 +01:00
patching.c
Merge branch 'for-next/insn' into for-next/core
2021-06-24 14:03:24 +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: Don't register user access sysctl handler multiple times
2022-01-04 14:57:14 +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
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
proton-pack.c
arm64: Use the clearbhb instruction in mitigations
2022-02-24 14:02:44 +00:00
psci.c
arm64: use function_nocfi with __pa_symbol
2021-04-08 16:04:22 -07:00
ptrace.c
- Add a set of thread_info.flags accessors which snapshot it before
2022-01-10 11:34:10 -08:00
reloc_test_core.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500
2019-06-19 17:09:55 +02:00
reloc_test_syms.S
arm64: kernel: Convert to modern annotations for assembly functions
2020-05-04 12:46:03 +01:00
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
arm64: Use correct method to calculate nomap region boundaries
2022-01-05 14:46:06 +00:00
signal32.c
arm64 updates for 5.15:
2021-09-01 15:04:29 -07:00
signal.c
arm64: Snapshot thread flags
2021-12-01 00:06:44 +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
Devicetree updates for v5.16:
2021-11-02 22:22:13 -07:00
stacktrace.c
arm64: Mark start_backtrace() notrace and NOKPROBE_SYMBOL
2022-01-24 14:25:20 +00:00
suspend.c
arm64: kasan: mte: use a constant kernel GCR_EL1 value
2021-08-02 18:14:21 +01:00
sys32.c
treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 452
2019-06-19 17:09:08 +02:00
sys_compat.c
arm64: Rename arm64-internal cache maintenance functions
2021-05-25 19:27:49 +01:00
sys.c
…
syscall.c
arm64: Snapshot thread flags
2021-12-01 00:06:44 +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
Merge branch 'signal-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2022-01-17 05:49:30 +02:00
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