diff options
| -rw-r--r-- | target-s390x/mem_helper.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/target-s390x/mem_helper.c b/target-s390x/mem_helper.c index b4e5d44011..b8d3a5fe27 100644 --- a/target-s390x/mem_helper.c +++ b/target-s390x/mem_helper.c @@ -54,6 +54,17 @@ void tlb_fill(CPUState *cs, target_ulong addr, int is_write, int mmu_idx, #define HELPER_LOG(x...) #endif +/* Reduce the length so that addr + len doesn't cross a page boundary. */ +static inline uint64_t adj_len_to_page(uint64_t len, uint64_t addr) +{ +#ifndef CONFIG_USER_ONLY + if ((addr & ~TARGET_PAGE_MASK) + len - 1 >= TARGET_PAGE_SIZE) { + return -addr & ~TARGET_PAGE_MASK; + } +#endif + return len; +} + #ifndef CONFIG_USER_ONLY static void mvc_fast_memset(CPUS390XState *env, uint32_t l, uint64_t dest, uint8_t byte) |