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Diffstat (limited to 'accel/tcg/translate-all.c')
-rw-r--r--accel/tcg/translate-all.c18
1 files changed, 15 insertions, 3 deletions
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index 67795cd78c..5ad1b919bc 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -1728,7 +1728,8 @@ void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr)
CPUArchState *env = cpu->env_ptr;
#endif
TranslationBlock *tb;
- uint32_t n;
+ uint32_t n, flags;
+ target_ulong pc, cs_base;
tb_lock();
tb = tb_find_pc(retaddr);
@@ -1766,8 +1767,14 @@ void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr)
cpu_abort(cpu, "TB too big during recompile");
}
- /* Adjust the execution state of the next TB. */
- cpu->cflags_next_tb = curr_cflags() | CF_LAST_IO | n;
+ pc = tb->pc;
+ cs_base = tb->cs_base;
+ flags = tb->flags;
+ tb_phys_invalidate(tb, -1);
+
+ /* Execute one IO instruction without caching
+ instead of creating large TB. */
+ cpu->cflags_next_tb = curr_cflags() | CF_LAST_IO | CF_NOCACHE | 1;
if (tb->cflags & CF_NOCACHE) {
if (tb->orig_tb) {
@@ -1778,6 +1785,11 @@ void cpu_io_recompile(CPUState *cpu, uintptr_t retaddr)
tb_remove(tb);
}
+ /* Generate new TB instead of the current one. */
+ /* FIXME: In theory this could raise an exception. In practice
+ we have already translated the block once so it's probably ok. */
+ tb_gen_code(cpu, pc, cs_base, flags, curr_cflags() | CF_LAST_IO | n);
+
/* TODO: If env->pc != tb->pc (i.e. the faulting instruction was not
* the first in the TB) then we end up generating a whole new TB and
* repeating the fault, which is horribly inefficient.