diff options
| 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/translate-all.c | |
| parent | 464c2969d5d7a0a5d38d2aa5d930986df876d3fb (diff) | |
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/translate-all.c')
| -rw-r--r-- | accel/tcg/translate-all.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c index 75a6cf49f1..39532fd44c 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); |