@@ -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)
This patch adds a function to adjust the length of a transfer so that it doesn't cross a page boundary in softmmu mode. It does nothing in user mode. Cc: Alexander Graf <agraf@suse.de> Cc: Richard Henderson <rth@twiddle.net> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net> --- target-s390x/mem_helper.c | 11 +++++++++++ 1 file changed, 11 insertions(+)