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Mark Rutland 745eec68a3 arm64: errata: Expand speculative SSBS workaround (again) 
[ Upstream commit adeec61a47 ]

A number of Arm Ltd CPUs suffer from errata whereby an MSR to the SSBS
special-purpose register does not affect subsequent speculative
instructions, permitting speculative store bypassing for a window of
time.

We worked around this for a number of CPUs in commits:

* 7187bb7d0b ("arm64: errata: Add workaround for Arm errata 3194386 and 3312417")
* 75b3c43eab ("arm64: errata: Expand speculative SSBS workaround")

Since then, similar errata have been published for a number of other Arm
Ltd CPUs, for which the same mitigation is sufficient. This is described
in their respective Software Developer Errata Notice (SDEN) documents:

* Cortex-A76 (MP052) SDEN v31.0, erratum 3324349
  https://developer.arm.com/documentation/SDEN-885749/3100/

* Cortex-A77 (MP074) SDEN v19.0, erratum 3324348
  https://developer.arm.com/documentation/SDEN-1152370/1900/

* Cortex-A78 (MP102) SDEN v21.0, erratum 3324344
  https://developer.arm.com/documentation/SDEN-1401784/2100/

* Cortex-A78C (MP138) SDEN v16.0, erratum 3324346
  https://developer.arm.com/documentation/SDEN-1707916/1600/

* Cortex-A78C (MP154) SDEN v10.0, erratum 3324347
  https://developer.arm.com/documentation/SDEN-2004089/1000/

* Cortex-A725 (MP190) SDEN v5.0, erratum 3456106
  https://developer.arm.com/documentation/SDEN-2832921/0500/

* Cortex-X1 (MP077) SDEN v21.0, erratum 3324344
  https://developer.arm.com/documentation/SDEN-1401782/2100/

* Cortex-X1C (MP136) SDEN v16.0, erratum 3324346
  https://developer.arm.com/documentation/SDEN-1707914/1600/

* Neoverse-N1 (MP050) SDEN v32.0, erratum 3324349
  https://developer.arm.com/documentation/SDEN-885747/3200/

* Neoverse-V1 (MP076) SDEN v19.0, erratum 3324341
  https://developer.arm.com/documentation/SDEN-1401781/1900/

Note that due to the manner in which Arm develops IP and tracks errata,
some CPUs share a common erratum number and some CPUs have multiple
erratum numbers for the same HW issue.

On parts without SB, it is necessary to use ISB for the workaround. The
spec_bar() macro used in the mitigation will expand to a "DSB SY; ISB"
sequence in this case, which is sufficient on all affected parts.

Enable the existing mitigation by adding the relevant MIDRs to
erratum_spec_ssbs_list. The list is sorted alphanumerically (involving
moving Neoverse-V3 after Neoverse-V2) so that this is easy to audit and
potentially extend again in future. The Kconfig text is also updated to
clarify the set of affected parts and the mitigation.

Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Will Deacon <will@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20240801101803.1982459-4-mark.rutland@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
[ Mark: fix conflicts in silicon-errata.rst ]
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-08-14 13:58:49 +02:00
..
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
kbuild: unify vdso_install rules
2024-06-12 11:12:32 +02:00
vdso32
kbuild: unify vdso_install rules
2024-06-12 11:12:32 +02:00
.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
treewide: Drop function_nocfi
2022-09-26 10:13:14 -07:00
acpi.c
arm64: acpi: Fix possible memory leak of ffh_ctxt
2023-02-24 14:21:49 +00:00
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
arm64: armv8_deprecated: Fix warning in isndep cpuhp starting process
2024-07-25 09:50:43 +02:00
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_errata.c
arm64: errata: Expand speculative SSBS workaround (again)
2024-08-14 13:58:49 +02:00
cpu_ops.c
…
cpu-reset.S
arm64: kernel: remove SHF_WRITE|SHF_EXECINSTR from .idmap.text
2023-05-02 12:42:22 +01:00
cpufeature.c
arm64: errata: Add workaround for Arm errata 3194386 and 3312417
2024-08-14 13:58:48 +02:00
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
Merge tag 'drm-next-2023-08-30' of git://anongit.freedesktop.org/drm/drm
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: entry: fix ARM64_WORKAROUND_SPECULATIVE_UNPRIV_LOAD
2024-01-31 16:18:55 -08:00
fpsimd.c
arm64/sme: Restore SMCR_EL1.EZT0 on exit from suspend
2024-03-01 13:35:08 +01:00
ftrace.c
arm64: module: mandate MODULE_PLTS
2023-06-06 17:39:05 +01:00
head.S
arm64/head: Disable MMU at EL2 before clearing HCR_EL2.E2H
2024-04-27 17:11:41 +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: 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
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
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
arm64: irq: set the correct node for shadow call stack
2024-02-05 20:14:38 +00:00
jump_label.c
arm64: jump_label: Ensure patched jump_labels are visible to all CPUs
2024-08-11 12:47:24 +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_file.c
arm64/kexec: Fix missing extra range for crashkres_low.
2022-09-01 11:50:00 +01:00
machine_kexec.c
Merge branch 'for-next/misc' into for-next/core
2023-04-20 11:22:09 +01:00
Makefile
Merge tag 'mm-nonmm-stable-2023-06-24-19-23' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-06-28 10:59:38 -07:00
module-plts.c
arm64: module: Fix PLT counting when CONFIG_RANDOMIZE_BASE=n
2023-11-28 17:20:00 +00:00
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
arm64: move preemption disablement to prctl handlers
2021-07-28 18:33:49 +01:00
process.c
Merge tag 'objtool-core-2023-04-27' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2023-04-28 14:02:54 -07:00
proton-pack.c
arm64: errata: Unify speculative SSBS errata logic
2024-08-14 13:58:49 +02:00
psci.c
treewide: Drop function_nocfi
2022-09-26 10:13:14 -07:00
ptrace.c
arm64/ptrace: Use saved floating point state type to determine SVE layout
2024-04-10 16:36:03 +02:00
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
signal32.c
x86/shstk: Add user control-protection fault handler
2023-08-02 15:01:50 -07:00
signal.c
arm64/signal: Don't assume that TIF_SVE means we saved SVE state
2024-02-23 09:25:13 +01:00
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
arm64: smccc: Save lr before calling __arm_smccc_sve_check()
2021-07-21 11:23:25 +01:00
smp_spin_table.c
treewide: Drop function_nocfi
2022-09-26 10:13:14 -07:00
smp.c
arm64: sdei: abort running SDEI handlers during crash
2023-08-04 17:35:33 +01:00
stacktrace.c
arm64: use XPACLRI to strip PAC
2023-04-13 12:27:11 +01:00
suspend.c
arm64/sme: Restore SME registers on exit from suspend
2024-03-01 13:35:08 +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
randomize_kstack: Remove non-functional per-arch entropy filtering
2024-07-05 09:33:54 +02:00
time.c
arm64: Make profile_pc() use arch_stack_walk()
2021-12-10 14:06:04 +00:00
topology.c
Merge tag 'riscv-for-linus-6.1-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
2022-10-09 13:24:01 -07:00
trace-events-emulation.h
…
traps.c
Merge tag 'mm-stable-2023-06-24-19-15' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
2023-06-28 10:28:11 -07:00
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
arm64: vdso: Pass (void *) to virt_to_page()
2023-05-16 14:53:36 +01:00
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