diff options
Diffstat (limited to 'accel/tcg/translate-all.c')
| -rw-r--r-- | accel/tcg/translate-all.c | 18 |
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. |