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accel/tcg: Record singlestep_enabled in tb->cflags

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Set CF_SINGLE_STEP when single-stepping is enabled.
This avoids the need to flush all tb's when turning
single-stepping on or off.

Tested-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2021-07-19 10:43:46 -10:00
parent d40c5c7976
commit c2ffd7549b
5 changed files with 8 additions and 15 deletions
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4
accel/tcg/translate-all.c
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@ -1432,10 +1432,6 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
}
QEMU_BUILD_BUG_ON(CF_COUNT_MASK + 1 != TCG_MAX_INSNS);
if (cpu->singlestep_enabled) {
max_insns = 1;
}
buffer_overflow:
tb = tcg_tb_alloc(tcg_ctx);
if (unlikely(!tb)) {