diff options
Diffstat (limited to 'include/arch')
| -rw-r--r-- | include/arch/aarch32/asm_macros.S | 5 | ||||
| -rw-r--r-- | include/arch/aarch64/asm_macros.S | 7 |
2 files changed, 11 insertions, 1 deletions
diff --git a/include/arch/aarch32/asm_macros.S b/include/arch/aarch32/asm_macros.S index ea1636e24..f75da0ce6 100644 --- a/include/arch/aarch32/asm_macros.S +++ b/include/arch/aarch32/asm_macros.S @@ -108,11 +108,16 @@ #else /* * Macro for mitigating against speculative execution beyond ERET. + * If possible use Speculation Barrier instruction defined in ARMv8.5 */ .macro exception_return eret +#if ARM_ARCH_AT_LEAST(8, 5) + sb +#else dsb nsh isb +#endif .endm #endif diff --git a/include/arch/aarch64/asm_macros.S b/include/arch/aarch64/asm_macros.S index a7d5a3dd6..cbb9f0be8 100644 --- a/include/arch/aarch64/asm_macros.S +++ b/include/arch/aarch64/asm_macros.S @@ -220,11 +220,16 @@ /* * Macro for mitigating against speculative execution beyond ERET. + * If possible use Speculation Barrier instruction defined in ARMv8.5 */ .macro exception_return eret - dsb nsh +#if ARM_ARCH_AT_LEAST(8, 5) + sb +#else + dsb nsh isb +#endif .endm #endif /* ASM_MACROS_S */ |