[PATCH v3 09/39] accel/tcg: Move can_do_io to CPUNegativeOffsetState

[Richard Henderson <richard.henderson@linaro.org>]

Minimize the displacement to can_do_io, since it may
be touched at the start of each TranslationBlock.
It fits into other padding within the substructure.

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 include/hw/core/cpu.h            | 2 +-
 accel/dummy-cpus.c               | 2 +-
 accel/kvm/kvm-accel-ops.c        | 2 +-
 accel/tcg/cpu-exec-common.c      | 2 +-
 accel/tcg/cpu-exec.c             | 2 +-
 accel/tcg/cputlb.c               | 2 +-
 accel/tcg/tcg-accel-ops-icount.c | 2 +-
 accel/tcg/tcg-accel-ops-mttcg.c  | 2 +-
 accel/tcg/tcg-accel-ops-rr.c     | 4 ++--
 accel/tcg/translator.c           | 4 ++--
 hw/core/cpu-common.c             | 2 +-
 softmmu/icount.c                 | 2 +-
 softmmu/watchpoint.c             | 2 +-
 13 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/include/hw/core/cpu.h b/include/hw/core/cpu.h
index 4609cf1ae0..819ff1ef2e 100644
--- a/include/hw/core/cpu.h
+++ b/include/hw/core/cpu.h
@@ -350,6 +350,7 @@ typedef union IcountDecr {
  */
 typedef struct CPUNegativeOffsetState {
     CPUTLB tlb;
+    uint32_t can_do_io;
     IcountDecr icount_decr;
 } CPUNegativeOffsetState;
 
@@ -547,7 +548,6 @@ struct CPUState {
     int cluster_index;
     uint32_t tcg_cflags;
     uint32_t halted;
-    uint32_t can_do_io;
     int32_t exception_index;
 
     AccelCPUState *accel;
diff --git a/accel/dummy-cpus.c b/accel/dummy-cpus.c
index d6a1b8d0a2..af7f90a4da 100644
--- a/accel/dummy-cpus.c
+++ b/accel/dummy-cpus.c
@@ -27,7 +27,7 @@ static void *dummy_cpu_thread_fn(void *arg)
     qemu_mutex_lock_iothread();
     qemu_thread_get_self(cpu->thread);
     cpu->thread_id = qemu_get_thread_id();
-    cpu->can_do_io = 1;
+    cpu->neg.can_do_io = 1;
     current_cpu = cpu;
 
 #ifndef _WIN32
diff --git a/accel/kvm/kvm-accel-ops.c b/accel/kvm/kvm-accel-ops.c
index 457eafa380..b610c0d378 100644
--- a/accel/kvm/kvm-accel-ops.c
+++ b/accel/kvm/kvm-accel-ops.c
@@ -36,7 +36,7 @@ static void *kvm_vcpu_thread_fn(void *arg)
     qemu_mutex_lock_iothread();
     qemu_thread_get_self(cpu->thread);
     cpu->thread_id = qemu_get_thread_id();
-    cpu->can_do_io = 1;
+    cpu->neg.can_do_io = 1;
     current_cpu = cpu;
 
     r = kvm_init_vcpu(cpu, &error_fatal);
diff --git a/accel/tcg/cpu-exec-common.c b/accel/tcg/cpu-exec-common.c
index 7e35d7f4b5..8ac2af4d0c 100644
--- a/accel/tcg/cpu-exec-common.c
+++ b/accel/tcg/cpu-exec-common.c
@@ -36,7 +36,7 @@ void cpu_loop_exit_noexc(CPUState *cpu)
 void cpu_loop_exit(CPUState *cpu)
 {
     /* Undo the setting in cpu_tb_exec.  */
-    cpu->can_do_io = 1;
+    cpu->neg.can_do_io = 1;
     /* Undo any setting in generated code.  */
     qemu_plugin_disable_mem_helpers(cpu);
     siglongjmp(cpu->jmp_env, 1);
diff --git a/accel/tcg/cpu-exec.c b/accel/tcg/cpu-exec.c
index e2c494e75e..b01e3e5dc8 100644
--- a/accel/tcg/cpu-exec.c
+++ b/accel/tcg/cpu-exec.c
@@ -455,7 +455,7 @@ cpu_tb_exec(CPUState *cpu, TranslationBlock *itb, int *tb_exit)
 
     qemu_thread_jit_execute();
     ret = tcg_qemu_tb_exec(env, tb_ptr);
-    cpu->can_do_io = 1;
+    cpu->neg.can_do_io = 1;
     qemu_plugin_disable_mem_helpers(cpu);
     /*
      * TODO: Delay swapping back to the read-write region of the TB
diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c
index 3270f65c20..d69e046b80 100644
--- a/accel/tcg/cputlb.c
+++ b/accel/tcg/cputlb.c
@@ -1361,7 +1361,7 @@ io_prepare(hwaddr *out_offset, CPUArchState *env, hwaddr xlat,
     section = iotlb_to_section(cpu, xlat, attrs);
     mr_offset = (xlat & TARGET_PAGE_MASK) + addr;
     cpu->mem_io_pc = retaddr;
-    if (!cpu->can_do_io) {
+    if (!cpu->neg.can_do_io) {
         cpu_io_recompile(cpu, retaddr);
     }
 
diff --git a/accel/tcg/tcg-accel-ops-icount.c b/accel/tcg/tcg-accel-ops-icount.c
index 3d2cfbbc97..0af643b217 100644
--- a/accel/tcg/tcg-accel-ops-icount.c
+++ b/accel/tcg/tcg-accel-ops-icount.c
@@ -153,7 +153,7 @@ void icount_handle_interrupt(CPUState *cpu, int mask)
 
     tcg_handle_interrupt(cpu, mask);
     if (qemu_cpu_is_self(cpu) &&
-        !cpu->can_do_io
+        !cpu->neg.can_do_io
         && (mask & ~old_mask) != 0) {
         cpu_abort(cpu, "Raised interrupt while not in I/O function");
     }
diff --git a/accel/tcg/tcg-accel-ops-mttcg.c b/accel/tcg/tcg-accel-ops-mttcg.c
index 4b0dfb4be7..785481dea3 100644
--- a/accel/tcg/tcg-accel-ops-mttcg.c
+++ b/accel/tcg/tcg-accel-ops-mttcg.c
@@ -80,7 +80,7 @@ static void *mttcg_cpu_thread_fn(void *arg)
     qemu_thread_get_self(cpu->thread);
 
     cpu->thread_id = qemu_get_thread_id();
-    cpu->can_do_io = 1;
+    cpu->neg.can_do_io = 1;
     current_cpu = cpu;
     cpu_thread_signal_created(cpu);
     qemu_guest_random_seed_thread_part2(cpu->random_seed);
diff --git a/accel/tcg/tcg-accel-ops-rr.c b/accel/tcg/tcg-accel-ops-rr.c
index 2d523289a8..c0aceb0a04 100644
--- a/accel/tcg/tcg-accel-ops-rr.c
+++ b/accel/tcg/tcg-accel-ops-rr.c
@@ -192,7 +192,7 @@ static void *rr_cpu_thread_fn(void *arg)
     qemu_thread_get_self(cpu->thread);
 
     cpu->thread_id = qemu_get_thread_id();
-    cpu->can_do_io = 1;
+    cpu->neg.can_do_io = 1;
     cpu_thread_signal_created(cpu);
     qemu_guest_random_seed_thread_part2(cpu->random_seed);
 
@@ -334,7 +334,7 @@ void rr_start_vcpu_thread(CPUState *cpu)
         cpu->thread = single_tcg_cpu_thread;
         cpu->halt_cond = single_tcg_halt_cond;
         cpu->thread_id = first_cpu->thread_id;
-        cpu->can_do_io = 1;
+        cpu->neg.can_do_io = 1;
         cpu->created = true;
     }
 }
diff --git a/accel/tcg/translator.c b/accel/tcg/translator.c
index 54190c785b..888302160c 100644
--- a/accel/tcg/translator.c
+++ b/accel/tcg/translator.c
@@ -19,7 +19,7 @@
 static void gen_io_start(void)
 {
     tcg_gen_st_i32(tcg_constant_i32(1), cpu_env,
-                   offsetof(ArchCPU, parent_obj.can_do_io) -
+                   offsetof(ArchCPU, parent_obj.neg.can_do_io) -
                    offsetof(ArchCPU, env));
 }
 
@@ -92,7 +92,7 @@ static TCGOp *gen_tb_start(uint32_t cflags)
          * go with gen_io_start().
          */
         tcg_gen_st_i32(tcg_constant_i32(0), cpu_env,
-                       offsetof(ArchCPU, parent_obj.can_do_io) -
+                       offsetof(ArchCPU, parent_obj.neg.can_do_io) -
                        offsetof(ArchCPU, env));
     }
 
diff --git a/hw/core/cpu-common.c b/hw/core/cpu-common.c
index 08d5bbc873..f0e07f3ae7 100644
--- a/hw/core/cpu-common.c
+++ b/hw/core/cpu-common.c
@@ -131,7 +131,7 @@ static void cpu_common_reset_hold(Object *obj)
     cpu->mem_io_pc = 0;
     cpu->icount_extra = 0;
     qatomic_set(&cpu->neg.icount_decr.u32, 0);
-    cpu->can_do_io = 1;
+    cpu->neg.can_do_io = 1;
     cpu->exception_index = -1;
     cpu->crash_occurred = false;
     cpu->cflags_next_tb = -1;
diff --git a/softmmu/icount.c b/softmmu/icount.c
index 144e24829c..956d15e343 100644
--- a/softmmu/icount.c
+++ b/softmmu/icount.c
@@ -111,7 +111,7 @@ static int64_t icount_get_raw_locked(void)
     CPUState *cpu = current_cpu;
 
     if (cpu && cpu->running) {
-        if (!cpu->can_do_io) {
+        if (!cpu->neg.can_do_io) {
             error_report("Bad icount read");
             exit(1);
         }
diff --git a/softmmu/watchpoint.c b/softmmu/watchpoint.c
index 5350163385..45d1f12faf 100644
--- a/softmmu/watchpoint.c
+++ b/softmmu/watchpoint.c
@@ -177,7 +177,7 @@ void cpu_check_watchpoint(CPUState *cpu, vaddr addr, vaddr len,
                  * Force recompile to succeed, because icount may
                  * be read only at the end of the block.
                  */
-                if (!cpu->can_do_io) {
+                if (!cpu->neg.can_do_io) {
                     /* Force execution of one insn next time.  */
                     cpu->cflags_next_tb = 1 | CF_LAST_IO | CF_NOIRQ
                                           | curr_cflags(cpu);
-- 
2.34.1