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| author | Sergey Fedorov <serge.fdrv@gmail.com> | 2015-06-30 12:35:09 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2015-08-06 12:04:08 +0200 |
| commit | 02d57ea115b7669f588371c86484a2e8ebc369be (patch) | |
| tree | a87d850835d5142255f0a48b724b43589e15abf5 /cpu-exec.c | |
| parent | af103c9310b7ab56a2552965d9d1274b0024f27b (diff) | |
| download | qemu-02d57ea115b7669f588371c86484a2e8ebc369be.zip | |
cpu-exec: Do not invalidate original TB in cpu_exec_nocache()
Instead of invalidating an original TB in cpu_exec_nocache()
prematurely, just save a link to it in the temporary generated TB. If
cpu_io_recompile() is raised subsequently from the temporary TB,
invalidate the original one as well. That allows reusing the original TB
each time cpu_exec_nocache() is called to handle expired instruction
counter in icount mode.
Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com>
Message-Id: <1435656909-29116-1-git-send-email-serge.fdrv@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'cpu-exec.c')
| -rw-r--r-- | cpu-exec.c | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/cpu-exec.c b/cpu-exec.c index 75694f3bb3..407fa4715a 100644 --- a/cpu-exec.c +++ b/cpu-exec.c @@ -231,19 +231,15 @@ static void cpu_exec_nocache(CPUState *cpu, int max_cycles, TranslationBlock *orig_tb) { TranslationBlock *tb; - target_ulong pc = orig_tb->pc; - target_ulong cs_base = orig_tb->cs_base; - uint64_t flags = orig_tb->flags; /* Should never happen. We only end up here when an existing TB is too long. */ if (max_cycles > CF_COUNT_MASK) max_cycles = CF_COUNT_MASK; - /* tb_gen_code can flush our orig_tb, invalidate it now */ - tb_phys_invalidate(orig_tb, -1); - tb = tb_gen_code(cpu, pc, cs_base, flags, + tb = tb_gen_code(cpu, orig_tb->pc, orig_tb->cs_base, orig_tb->flags, max_cycles | CF_NOCACHE); + tb->orig_tb = tcg_ctx.tb_ctx.tb_invalidated_flag ? NULL : orig_tb; cpu->current_tb = tb; /* execute the generated code */ trace_exec_tb_nocache(tb, tb->pc); |