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-rw-r--r--cpus.c2
-rw-r--r--include/exec/cpu-defs.h1
-rw-r--r--include/exec/exec-all.h21
-rw-r--r--include/exec/gen-icount.h4
-rw-r--r--include/exec/softmmu_template.h4
-rw-r--r--include/qom/cpu.h2
-rw-r--r--qom/cpu.c1
-rw-r--r--translate-all.c5
8 files changed, 24 insertions, 16 deletions
diff --git a/cpus.c b/cpus.c
index eda6d02..05016dc 100644
--- a/cpus.c
+++ b/cpus.c
@@ -140,7 +140,7 @@ static int64_t cpu_get_icount_locked(void)
icount = qemu_icount;
if (cpu) {
CPUArchState *env = cpu->env_ptr;
- if (!can_do_io(env)) {
+ if (!cpu_can_do_io(cpu)) {
fprintf(stderr, "Bad clock read\n");
}
icount -= (env->icount_decr.u16.low + env->icount_extra);
diff --git a/include/exec/cpu-defs.h b/include/exec/cpu-defs.h
index bdcfefb3..068b6c1 100644
--- a/include/exec/cpu-defs.h
+++ b/include/exec/cpu-defs.h
@@ -157,7 +157,6 @@ typedef struct CPUWatchpoint {
uint32_t u32; \
icount_decr_u16 u16; \
} icount_decr; \
- uint32_t can_do_io; /* nonzero if memory mapped IO is safe. */ \
\
/* from this point: preserved by CPU reset */ \
/* ice debug support */ \
diff --git a/include/exec/exec-all.h b/include/exec/exec-all.h
index a387922..2179329 100644
--- a/include/exec/exec-all.h
+++ b/include/exec/exec-all.h
@@ -380,20 +380,25 @@ extern int singlestep;
/* cpu-exec.c */
extern volatile sig_atomic_t exit_request;
-/* Deterministic execution requires that IO only be performed on the last
- instruction of a TB so that interrupts take effect immediately. */
-static inline int can_do_io(CPUArchState *env)
+/**
+ * cpu_can_do_io:
+ * @cpu: The CPU for which to check IO.
+ *
+ * Deterministic execution requires that IO only be performed on the last
+ * instruction of a TB so that interrupts take effect immediately.
+ *
+ * Returns: %true if memory-mapped IO is safe, %false otherwise.
+ */
+static inline bool cpu_can_do_io(CPUState *cpu)
{
- CPUState *cpu = ENV_GET_CPU(env);
-
if (!use_icount) {
- return 1;
+ return true;
}
/* If not executing code then assume we are ok. */
if (cpu->current_tb == NULL) {
- return 1;
+ return true;
}
- return env->can_do_io != 0;
+ return cpu->can_do_io != 0;
}
#endif
diff --git a/include/exec/gen-icount.h b/include/exec/gen-icount.h
index 39a6b61..f0dace3 100644
--- a/include/exec/gen-icount.h
+++ b/include/exec/gen-icount.h
@@ -51,14 +51,14 @@ static void gen_tb_end(TranslationBlock *tb, int num_insns)
static inline void gen_io_start(void)
{
TCGv_i32 tmp = tcg_const_i32(1);
- tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUArchState, can_do_io));
+ tcg_gen_st_i32(tmp, cpu_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
tcg_temp_free_i32(tmp);
}
static inline void gen_io_end(void)
{
TCGv_i32 tmp = tcg_const_i32(0);
- tcg_gen_st_i32(tmp, cpu_env, offsetof(CPUArchState, can_do_io));
+ tcg_gen_st_i32(tmp, cpu_env, -ENV_OFFSET + offsetof(CPUState, can_do_io));
tcg_temp_free_i32(tmp);
}
diff --git a/include/exec/softmmu_template.h b/include/exec/softmmu_template.h
index c7cd937..ac825d2 100644
--- a/include/exec/softmmu_template.h
+++ b/include/exec/softmmu_template.h
@@ -127,7 +127,7 @@ static inline DATA_TYPE glue(io_read, SUFFIX)(CPUArchState *env,
physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
cpu->mem_io_pc = retaddr;
- if (mr != &io_mem_rom && mr != &io_mem_notdirty && !can_do_io(env)) {
+ if (mr != &io_mem_rom && mr != &io_mem_notdirty && !cpu_can_do_io(cpu)) {
cpu_io_recompile(env, retaddr);
}
@@ -333,7 +333,7 @@ static inline void glue(io_write, SUFFIX)(CPUArchState *env,
MemoryRegion *mr = iotlb_to_region(cpu->as, physaddr);
physaddr = (physaddr & TARGET_PAGE_MASK) + addr;
- if (mr != &io_mem_rom && mr != &io_mem_notdirty && !can_do_io(env)) {
+ if (mr != &io_mem_rom && mr != &io_mem_notdirty && !cpu_can_do_io(cpu)) {
cpu_io_recompile(env, retaddr);
}
diff --git a/include/qom/cpu.h b/include/qom/cpu.h
index 9d52cf3..f80036e 100644
--- a/include/qom/cpu.h
+++ b/include/qom/cpu.h
@@ -157,6 +157,7 @@ struct kvm_run;
* @tcg_exit_req: Set to force TCG to stop executing linked TBs for this
* CPU and return to its top level loop.
* @singlestep_enabled: Flags for single-stepping.
+ * @can_do_io: Nonzero if memory-mapped IO is safe.
* @env_ptr: Pointer to subclass-specific CPUArchState field.
* @current_tb: Currently executing TB.
* @gdb_regs: Additional GDB registers.
@@ -220,6 +221,7 @@ struct CPUState {
/* TODO Move common fields from CPUArchState here. */
int cpu_index; /* used by alpha TCG */
uint32_t halted; /* used by alpha, cris, ppc TCG */
+ uint32_t can_do_io;
};
QTAILQ_HEAD(CPUTailQ, CPUState);
diff --git a/qom/cpu.c b/qom/cpu.c
index 4d60c03..e7d5999 100644
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -241,6 +241,7 @@ static void cpu_common_reset(CPUState *cpu)
cpu->halted = 0;
cpu->mem_io_pc = 0;
cpu->mem_io_vaddr = 0;
+ cpu->can_do_io = 0;
}
static bool cpu_common_has_work(CPUState *cs)
diff --git a/translate-all.c b/translate-all.c
index dc35caa..a1af5ef 100644
--- a/translate-all.c
+++ b/translate-all.c
@@ -200,6 +200,7 @@ int cpu_gen_code(CPUArchState *env, TranslationBlock *tb, int *gen_code_size_ptr
static int cpu_restore_state_from_tb(TranslationBlock *tb, CPUArchState *env,
uintptr_t searched_pc)
{
+ CPUState *cpu = ENV_GET_CPU(env);
TCGContext *s = &tcg_ctx;
int j;
uintptr_t tc_ptr;
@@ -218,7 +219,7 @@ static int cpu_restore_state_from_tb(TranslationBlock *tb, CPUArchState *env,
/* Reset the cycle counter to the start of the block. */
env->icount_decr.u16.low += tb->icount;
/* Clear the IO flag. */
- env->can_do_io = 0;
+ cpu->can_do_io = 0;
}
/* find opc index corresponding to search_pc */
@@ -1409,7 +1410,7 @@ static void tcg_handle_interrupt(CPUState *cpu, int mask)
if (use_icount) {
env->icount_decr.u16.high = 0xffff;
- if (!can_do_io(env)
+ if (!cpu_can_do_io(cpu)
&& (mask & ~old_mask) != 0) {
cpu_abort(env, "Raised interrupt while not in I/O function");
}
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