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| author | Richard Henderson <richard.henderson@linaro.org> | 2019-04-15 20:54:54 -1000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2019-04-24 13:04:33 -0700 |
| commit | 8b86d6d25807e13a63ab6ea879f976b9f18cc45a (patch) | |
| tree | f29fd7599e756b459c2fca9af822a6c151fe4ea5 /accel/tcg | |
| parent | 464c2969d5d7a0a5d38d2aa5d930986df876d3fb (diff) | |
| download | qemu-8b86d6d25807e13a63ab6ea879f976b9f18cc45a.zip qemu-8b86d6d25807e13a63ab6ea879f976b9f18cc45a.tar.gz qemu-8b86d6d25807e13a63ab6ea879f976b9f18cc45a.tar.bz2 | |
tcg: Hoist max_insns computation to tb_gen_code
In order to handle TB's that translate to too much code, we
need to place the control of the length of the translation
in the hands of the code gen master loop.
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'accel/tcg')
| -rw-r--r-- | accel/tcg/translate-all.c | 15 | ||||
| -rw-r--r-- | accel/tcg/translator.c | 15 |
2 files changed, 15 insertions, 15 deletions
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index 75a6cf4..39532fd 100644 --- a/accel/tcg/translate-all.c +++ b/accel/tcg/translate-all.c @@ -1674,7 +1674,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, tb_page_addr_t phys_pc, phys_page2; target_ulong virt_page2; tcg_insn_unit *gen_code_buf; - int gen_code_size, search_size; + int gen_code_size, search_size, max_insns; #ifdef CONFIG_PROFILER TCGProfile *prof = &tcg_ctx->prof; int64_t ti; @@ -1692,6 +1692,17 @@ TranslationBlock *tb_gen_code(CPUState *cpu, cflags &= ~CF_CLUSTER_MASK; cflags |= cpu->cluster_index << CF_CLUSTER_SHIFT; + max_insns = cflags & CF_COUNT_MASK; + if (max_insns == 0) { + max_insns = CF_COUNT_MASK; + } + if (max_insns > TCG_MAX_INSNS) { + max_insns = TCG_MAX_INSNS; + } + if (cpu->singlestep_enabled || singlestep) { + max_insns = 1; + } + buffer_overflow: tb = tb_alloc(pc); if (unlikely(!tb)) { @@ -1721,7 +1732,7 @@ TranslationBlock *tb_gen_code(CPUState *cpu, tcg_func_start(tcg_ctx); tcg_ctx->cpu = ENV_GET_CPU(env); - gen_intermediate_code(cpu, tb); + gen_intermediate_code(cpu, tb, max_insns); tcg_ctx->cpu = NULL; trace_translate_block(tb, tb->pc, tb->tc.ptr); diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c index afd0a49..8d65ead 100644 --- a/accel/tcg/translator.c +++ b/accel/tcg/translator.c @@ -32,7 +32,7 @@ void translator_loop_temp_check(DisasContextBase *db) } void translator_loop(const TranslatorOps *ops, DisasContextBase *db, - CPUState *cpu, TranslationBlock *tb) + CPUState *cpu, TranslationBlock *tb, int max_insns) { int bp_insn = 0; @@ -42,20 +42,9 @@ void translator_loop(const TranslatorOps *ops, DisasContextBase *db, db->pc_next = db->pc_first; db->is_jmp = DISAS_NEXT; db->num_insns = 0; + db->max_insns = max_insns; db->singlestep_enabled = cpu->singlestep_enabled; - /* Instruction counting */ - db->max_insns = tb_cflags(db->tb) & CF_COUNT_MASK; - if (db->max_insns == 0) { - db->max_insns = CF_COUNT_MASK; - } - if (db->max_insns > TCG_MAX_INSNS) { - db->max_insns = TCG_MAX_INSNS; - } - if (db->singlestep_enabled || singlestep) { - db->max_insns = 1; - } - ops->init_disas_context(db, cpu); tcg_debug_assert(db->is_jmp == DISAS_NEXT); /* no early exit */ |