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| author | Peter Maydell <peter.maydell@linaro.org> | 2023-04-17 17:40:34 +0100 |
|---|---|---|
| committer | Peter Maydell <peter.maydell@linaro.org> | 2023-05-02 15:47:40 +0100 |
| commit | 0e33928cd9b445b2331122154ebe8679aa2ff86e (patch) | |
| tree | bf31edacab8ca76057d3c75f8b7ed558b16dcbfa /accel/tcg | |
| parent | 93cbd6c91db6bb4e44580118865862f716338f14 (diff) | |
| download | qemu-0e33928cd9b445b2331122154ebe8679aa2ff86e.zip qemu-0e33928cd9b445b2331122154ebe8679aa2ff86e.tar.gz qemu-0e33928cd9b445b2331122154ebe8679aa2ff86e.tar.bz2 | |
accel/tcg: Use one_insn_per_tb global instead of old singlestep global
The only place left that looks at the old 'singlestep' global
variable is the TCG curr_cflags() function. Replace the old global
with a new 'one_insn_per_tb' which is defined in tcg-all.c and
declared in accel/tcg/internal.h. This keeps it restricted to the
TCG code, unlike 'singlestep' which was available to every file in
the system and defined in multiple different places for softmmu vs
linux-user vs bsd-user.
While we're making this change, use qatomic_read() and qatomic_set()
on the accesses to the new global, because TCG will read it without
holding a lock.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20230417164041.684562-4-peter.maydell@linaro.org
Diffstat (limited to 'accel/tcg')
| -rw-r--r-- | accel/tcg/cpu-exec.c | 2 | ||||
| -rw-r--r-- | accel/tcg/internal.h | 2 | ||||
| -rw-r--r-- | accel/tcg/tcg-all.c | 6 |
3 files changed, 7 insertions, 3 deletions
diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c index 8370c92..bc0e1c3 100644 --- a/accel/tcg/cpu-exec.c +++ b/accel/tcg/cpu-exec.c @@ -159,7 +159,7 @@ uint32_t curr_cflags(CPUState *cpu) */ if (unlikely(cpu->singlestep_enabled)) { cflags |= CF_NO_GOTO_TB | CF_NO_GOTO_PTR | CF_SINGLE_STEP | 1; - } else if (singlestep) { + } else if (qatomic_read(&one_insn_per_tb)) { cflags |= CF_NO_GOTO_TB | 1; } else if (qemu_loglevel_mask(CPU_LOG_TB_NOCHAIN)) { cflags |= CF_NO_GOTO_TB; diff --git a/accel/tcg/internal.h b/accel/tcg/internal.h index 96f198b..7bb0fdb 100644 --- a/accel/tcg/internal.h +++ b/accel/tcg/internal.h @@ -67,4 +67,6 @@ static inline target_ulong log_pc(CPUState *cpu, const TranslationBlock *tb) extern int64_t max_delay; extern int64_t max_advance; +extern bool one_insn_per_tb; + #endif /* ACCEL_TCG_INTERNAL_H */ diff --git a/accel/tcg/tcg-all.c b/accel/tcg/tcg-all.c index fcf361c..a831f8d 100644 --- a/accel/tcg/tcg-all.c +++ b/accel/tcg/tcg-all.c @@ -31,6 +31,7 @@ #include "qapi/error.h" #include "qemu/error-report.h" #include "qemu/accel.h" +#include "qemu/atomic.h" #include "qapi/qapi-builtin-visit.h" #include "qemu/units.h" #if !defined(CONFIG_USER_ONLY) @@ -110,6 +111,7 @@ static void tcg_accel_instance_init(Object *obj) } bool mttcg_enabled; +bool one_insn_per_tb; static int tcg_init_machine(MachineState *ms) { @@ -219,8 +221,8 @@ static void tcg_set_one_insn_per_tb(Object *obj, bool value, Error **errp) { TCGState *s = TCG_STATE(obj); s->one_insn_per_tb = value; - /* For the moment, set the global also: this changes the behaviour */ - singlestep = value; + /* Set the global also: this changes the behaviour */ + qatomic_set(&one_insn_per_tb, value); } static int tcg_gdbstub_supported_sstep_flags(void) |