diff options
Diffstat (limited to 'target/arm/tcg/mte_helper.c')
| -rw-r--r-- | target/arm/tcg/mte_helper.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/target/arm/tcg/mte_helper.c b/target/arm/tcg/mte_helper.c index a4f3f92bc0..9c64def081 100644 --- a/target/arm/tcg/mte_helper.c +++ b/target/arm/tcg/mte_helper.c @@ -785,6 +785,24 @@ uint64_t mte_check(CPUARMState *env, uint32_t desc, uint64_t ptr, uintptr_t ra) uint64_t HELPER(mte_check)(CPUARMState *env, uint32_t desc, uint64_t ptr) { + /* + * R_XCHFJ: Alignment check not caused by memory type is priority 1, + * higher than any translation fault. When MTE is disabled, tcg + * performs the alignment check during the code generated for the + * memory access. With MTE enabled, we must check this here before + * raising any translation fault in allocation_tag_mem. + */ + unsigned align = FIELD_EX32(desc, MTEDESC, ALIGN); + if (unlikely(align)) { + align = (1u << align) - 1; + if (unlikely(ptr & align)) { + int idx = FIELD_EX32(desc, MTEDESC, MIDX); + bool w = FIELD_EX32(desc, MTEDESC, WRITE); + MMUAccessType type = w ? MMU_DATA_STORE : MMU_DATA_LOAD; + arm_cpu_do_unaligned_access(env_cpu(env), ptr, type, idx, GETPC()); + } + } + return mte_check(env, desc, ptr, GETPC()); } |