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-rw-r--r--accel/tcg/cpu-exec.c3
-rw-r--r--accel/tcg/tcg-accel-ops-mttcg.c3
-rw-r--r--accel/tcg/tcg-accel-ops-rr.c2
-rw-r--r--accel/tcg/tcg-accel-ops.c8
-rw-r--r--accel/tcg/tcg-accel-ops.h1
-rw-r--r--accel/tcg/translate-all.c4
-rw-r--r--include/exec/exec-all.h7
-rw-r--r--include/hw/core/cpu.h2
-rw-r--r--linux-user/main.c1
-rw-r--r--linux-user/sh4/signal.c8
-rw-r--r--linux-user/syscall.c18
11 files changed, 30 insertions, 27 deletions
diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index 931da96c2b..bdfa036ac8 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -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();
}
diff --git a/accel/tcg/tcg-accel-ops-mttcg.c b/accel/tcg/tcg-accel-ops-mttcg.c
index 42973fb062..847d2079d2 100644
--- a/accel/tcg/tcg-accel-ops-mttcg.c
+++ b/accel/tcg/tcg-accel-ops-mttcg.c
@@ -114,8 +114,7 @@ void mttcg_start_vcpu_thread(CPUState *cpu)
char thread_name[VCPU_THREAD_NAME_SIZE];
g_assert(tcg_enabled());
-
- parallel_cpus = (current_machine->smp.max_cpus > 1);
+ tcg_cpu_init_cflags(cpu, current_machine->smp.max_cpus > 1);
cpu->thread = g_malloc0(sizeof(QemuThread));
cpu->halt_cond = g_malloc0(sizeof(QemuCond));
diff --git a/accel/tcg/tcg-accel-ops-rr.c b/accel/tcg/tcg-accel-ops-rr.c
index 4a66055e0d..018b54c508 100644
--- a/accel/tcg/tcg-accel-ops-rr.c
+++ b/accel/tcg/tcg-accel-ops-rr.c
@@ -269,7 +269,7 @@ void rr_start_vcpu_thread(CPUState *cpu)
static QemuThread *single_tcg_cpu_thread;
g_assert(tcg_enabled());
- parallel_cpus = false;
+ tcg_cpu_init_cflags(cpu, false);
if (!single_tcg_cpu_thread) {
cpu->thread = g_malloc0(sizeof(QemuThread));
diff --git a/accel/tcg/tcg-accel-ops.c b/accel/tcg/tcg-accel-ops.c
index 6144d9df87..6cdcaa2855 100644
--- a/accel/tcg/tcg-accel-ops.c
+++ b/accel/tcg/tcg-accel-ops.c
@@ -41,6 +41,14 @@
/* common functionality among all TCG variants */
+void tcg_cpu_init_cflags(CPUState *cpu, bool parallel)
+{
+ uint32_t cflags = cpu->cluster_index << CF_CLUSTER_SHIFT;
+ cflags |= parallel ? CF_PARALLEL : 0;
+ cflags |= icount_enabled() ? CF_USE_ICOUNT : 0;
+ cpu->tcg_cflags = cflags;
+}
+
void tcg_cpus_destroy(CPUState *cpu)
{
cpu_thread_signal_destroyed(cpu);
diff --git a/accel/tcg/tcg-accel-ops.h b/accel/tcg/tcg-accel-ops.h
index 48130006de..6a5fcef889 100644
--- a/accel/tcg/tcg-accel-ops.h
+++ b/accel/tcg/tcg-accel-ops.h
@@ -17,5 +17,6 @@
void tcg_cpus_destroy(CPUState *cpu);
int tcg_cpus_exec(CPUState *cpu);
void tcg_handle_interrupt(CPUState *cpu, int mask);
+void tcg_cpu_init_cflags(CPUState *cpu, bool parallel);
#endif /* TCG_CPUS_H */
diff --git a/accel/tcg/translate-all.c b/accel/tcg/translate-all.c
index 0b0bfd35ab..f32df8b240 100644
--- a/accel/tcg/translate-all.c
+++ b/accel/tcg/translate-all.c
@@ -224,7 +224,6 @@ static void *l1_map[V_L1_MAX_SIZE];
TCGContext tcg_init_ctx;
__thread TCGContext *tcg_ctx;
TBContext tb_ctx;
-bool parallel_cpus;
static void page_table_config_init(void)
{
@@ -1867,9 +1866,6 @@ TranslationBlock *tb_gen_code(CPUState *cpu,
cflags = (cflags & ~CF_COUNT_MASK) | 1;
}
- 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;
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index a262dd5804..6b036cae8f 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -513,8 +513,6 @@ struct TranslationBlock {
uintptr_t jmp_dest[2];
};
-extern bool parallel_cpus;
-
/* Hide the qatomic_read to make code a little easier on the eyes */
static inline uint32_t tb_cflags(const TranslationBlock *tb)
{
@@ -524,10 +522,7 @@ static inline uint32_t tb_cflags(const TranslationBlock *tb)
/* current cflags for hashing/comparison */
static inline uint32_t curr_cflags(CPUState *cpu)
{
- uint32_t cflags = deposit32(0, CF_CLUSTER_SHIFT, 8, cpu->cluster_index);
- cflags |= parallel_cpus ? CF_PARALLEL : 0;
- cflags |= icount_enabled() ? CF_USE_ICOUNT : 0;
- return cflags;
+ return cpu->tcg_cflags;
}
/* TranslationBlock invalidate API */
diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index c005d3dc2d..c68bc3ba8a 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -282,6 +282,7 @@ struct qemu_work_item;
* to a cluster this will be UNASSIGNED_CLUSTER_INDEX; otherwise it will
* be the same as the cluster-id property of the CPU object's TYPE_CPU_CLUSTER
* QOM parent.
+ * @tcg_cflags: Pre-computed cflags for this cpu.
* @nr_cores: Number of cores within this CPU package.
* @nr_threads: Number of threads within this CPU.
* @running: #true if CPU is currently running (lockless).
@@ -412,6 +413,7 @@ struct CPUState {
/* TODO Move common fields from CPUArchState here. */
int cpu_index;
int cluster_index;
+ uint32_t tcg_cflags;
uint32_t halted;
uint32_t can_do_io;
int32_t exception_index;
diff --git a/linux-user/main.c b/linux-user/main.c
index 81f48ff54e..4f4746dce8 100644
--- a/linux-user/main.c
+++ b/linux-user/main.c
@@ -205,6 +205,7 @@ CPUArchState *cpu_copy(CPUArchState *env)
/* Reset non arch specific state */
cpu_reset(new_cpu);
+ new_cpu->tcg_cflags = cpu->tcg_cflags;
memcpy(new_env, env, sizeof(CPUArchState));
/* Clone all break/watchpoints.
diff --git a/linux-user/sh4/signal.c b/linux-user/sh4/signal.c
index cc89a48ff8..29c1ee30e6 100644
--- a/linux-user/sh4/signal.c
+++ b/linux-user/sh4/signal.c
@@ -82,9 +82,11 @@ static abi_ulong get_sigframe(struct target_sigaction *ka,
return (sp - frame_size) & -8ul;
}
-/* Notice when we're in the middle of a gUSA region and reset.
- Note that this will only occur for !parallel_cpus, as we will
- translate such sequences differently in a parallel context. */
+/*
+ * Notice when we're in the middle of a gUSA region and reset.
+ * Note that this will only occur when #CF_PARALLEL is unset, as we
+ * will translate such sequences differently in a parallel context.
+ */
static void unwind_gusa(CPUSH4State *regs)
{
/* If the stack pointer is sufficiently negative, and we haven't
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 389ec09764..9522f603aa 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6481,6 +6481,16 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp,
/* Grab a mutex so that thread setup appears atomic. */
pthread_mutex_lock(&clone_lock);
+ /*
+ * If this is our first additional thread, we need to ensure we
+ * generate code for parallel execution and flush old translations.
+ * Do this now so that the copy gets CF_PARALLEL too.
+ */
+ if (!(cpu->tcg_cflags & CF_PARALLEL)) {
+ cpu->tcg_cflags |= CF_PARALLEL;
+ tb_flush(cpu);
+ }
+
/* we create a new CPU instance. */
new_env = cpu_copy(env);
/* Init regs that differ from the parent. */
@@ -6521,14 +6531,6 @@ static int do_fork(CPUArchState *env, unsigned int flags, abi_ulong newsp,
sigprocmask(SIG_BLOCK, &sigmask, &info.sigmask);
cpu->random_seed = qemu_guest_random_seed_thread_part1();
- /* If this is our first additional thread, we need to ensure we
- * generate code for parallel execution and flush old translations.
- */
- if (!parallel_cpus) {
- parallel_cpus = true;
- tb_flush(cpu);
- }
-
ret = pthread_create(&info.thread, &attr, clone_func, &info);
/* TODO: Free new CPU state if thread creation failed. */
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-12-18 11:05:23 +0100