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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-06 16:45:36 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-12-06 16:45:36 -0800 |
| commit | b72f711a4efadfaa8a16f9cb708bfe1ce6125906 (patch) | |
| tree | 68d3d1e814746c79e2fcaf0a8992783f897b5e55 | |
| parent | 7e40b56c776f75a35838360bf6360e2aa9311f92 (diff) | |
| parent | 3a4d0c2172bcf15b7a3d9d498b2b355f9864286b (diff) | |
Merge branch 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm
Pull ARM spectre fix from Russell King:
"Exynos folk noticed that CPU hotplug wasn't working with their kernel
configuration, and have tested this as fixing the problem"
* 'spectre' of git://git.armlinux.org.uk/~rmk/linux-arm:
ARM: ensure that processor vtables is not lost after boot
| -rw-r--r-- | arch/arm/mm/proc-macros.S | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/arm/mm/proc-macros.S b/arch/arm/mm/proc-macros.S index 81d0efb055c6..19516fbc2c55 100644 --- a/arch/arm/mm/proc-macros.S +++ b/arch/arm/mm/proc-macros.S @@ -274,6 +274,13 @@ .endm .macro define_processor_functions name:req, dabort:req, pabort:req, nommu=0, suspend=0, bugs=0 +/* + * If we are building for big.Little with branch predictor hardening, + * we need the processor function tables to remain available after boot. + */ +#if 1 // defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR) + .section ".rodata" +#endif .type \name\()_processor_functions, #object .align 2 ENTRY(\name\()_processor_functions) @@ -309,6 +316,9 @@ ENTRY(\name\()_processor_functions) .endif .size \name\()_processor_functions, . - \name\()_processor_functions +#if 1 // defined(CONFIG_BIG_LITTLE) && defined(CONFIG_HARDEN_BRANCH_PREDICTOR) + .previous +#endif .endm .macro define_cache_functions name:req |