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accel/tcg: Precompute curr_cflags into cpu->tcg_cflags

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The primary motivation is to remove a dozen insns along
the fast-path in tb_lookup.  As a byproduct, this allows
us to completely remove parallel_cpus.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-03-01 19:21:08 -08:00
parent 872ebd884d
commit 6cc9d67c6f
11 changed files with 30 additions and 27 deletions
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3
accel/tcg/cpu-exec.c
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@ -267,8 +267,6 @@ void cpu_exec_step_atomic(CPUState *cpu)
mmap_unlock();
}
/* Since we got here, we know that parallel_cpus must be true. */
parallel_cpus = false;
cpu_exec_enter(cpu);
/* execute the generated code */
trace_exec_tb(tb, pc);
@ -296,7 +294,6 @@ void cpu_exec_step_atomic(CPUState *cpu)
* the execution.
*/
g_assert(cpu_in_exclusive_context(cpu));
parallel_cpus = true;
cpu->running = false;
end_exclusive();
}