diff options
| author | Will Deacon <will@kernel.org> | 2020-09-15 22:11:13 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-09-29 16:08:15 +0100 |
| commit | 6e5f0927846adf39aebee450f13871e3cb4ab012 (patch) | |
| tree | 261a6871c7b1a509831ad48b9ec2ea0fe9204675 /arch/arm64/kernel/entry.S | |
| parent | 39533e12063be7f55e3d6ae21ffe067799d542a4 (diff) | |
arm64: Remove Spectre-related CONFIG_* options
The spectre mitigations are too configurable for their own good, leading
to confusing logic trying to figure out when we should mitigate and when
we shouldn't. Although the plethora of command-line options need to stick
around for backwards compatibility, the default-on CONFIG options that
depend on EXPERT can be dropped, as the mitigations only do anything if
the system is vulnerable, a mitigation is available and the command-line
hasn't disabled it.
Remove CONFIG_HARDEN_BRANCH_PREDICTOR and CONFIG_ARM64_SSBD in favour of
enabling this code unconditionally.
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/kernel/entry.S')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 55af8b504b65..81b709349d7b 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -132,7 +132,6 @@ alternative_else_nop_endif * them if required. */ .macro apply_ssbd, state, tmp1, tmp2 -#ifdef CONFIG_ARM64_SSBD alternative_cb arm64_enable_wa2_handling b .L__asm_ssbd_skip\@ alternative_cb_end @@ -146,7 +145,6 @@ alternative_cb arm64_update_smccc_conduit nop // Patched to SMC/HVC #0 alternative_cb_end .L__asm_ssbd_skip\@: -#endif .endm .macro kernel_entry, el, regsize = 64 @@ -697,11 +695,9 @@ el0_irq_naked: bl trace_hardirqs_off #endif -#ifdef CONFIG_HARDEN_BRANCH_PREDICTOR tbz x22, #55, 1f bl do_el0_irq_bp_hardening 1: -#endif irq_handler #ifdef CONFIG_TRACE_IRQFLAGS |