diff options
Diffstat (limited to 'arch/arm64/kernel/entry.S')
| -rw-r--r-- | arch/arm64/kernel/entry.S | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index 959fe8733560..9fe1a85c2027 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -124,21 +124,24 @@ msr sp_el0, x23 #ifdef CONFIG_ARM64_ERRATUM_845719 - alternative_insn \ - "nop", \ - "tbz x22, #4, 1f", \ - ARM64_WORKAROUND_845719 + +#undef SEQUENCE_ORG +#undef SEQUENCE_ALT + #ifdef CONFIG_PID_IN_CONTEXTIDR - alternative_insn \ - "nop; nop", \ - "mrs x29, contextidr_el1; msr contextidr_el1, x29; 1:", \ - ARM64_WORKAROUND_845719 + +#define SEQUENCE_ORG "nop ; nop ; nop" +#define SEQUENCE_ALT "tbz x22, #4, 1f ; mrs x29, contextidr_el1; msr contextidr_el1, x29; 1:" + #else - alternative_insn \ - "nop", \ - "msr contextidr_el1, xzr; 1:", \ - ARM64_WORKAROUND_845719 + +#define SEQUENCE_ORG "nop ; nop" +#define SEQUENCE_ALT "tbz x22, #4, 1f ; msr contextidr_el1, xzr; 1:" + #endif + + alternative_insn SEQUENCE_ORG, SEQUENCE_ALT, ARM64_WORKAROUND_845719 + #endif .endif msr elr_el1, x21 // set up the return data |