accel/hvf: Use accel-specific per-vcpu @dirty field

HVF has a specific use of the CPUState::vcpu_dirty field
(CPUState::vcpu_dirty is not used by common code).
To make this field accel-specific, add and use a new
@dirty variable in the AccelCPUState structure.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20240424174506.326-4-philmd@linaro.org>

accel/hvf/hvf-accel-ops.c

@@ -204,15 +204,15 @@ static void hvf_set_phys_mem(MemoryRegionSection *section, bool add)
 
 static void do_hvf_cpu_synchronize_state(CPUState *cpu, run_on_cpu_data arg)
 {
-    if (!cpu->vcpu_dirty) {
+    if (!cpu->accel->dirty) {
         hvf_get_registers(cpu);
-        cpu->vcpu_dirty = true;
+        cpu->accel->dirty = true;
     }
 }
 
 static void hvf_cpu_synchronize_state(CPUState *cpu)
 {
-    if (!cpu->vcpu_dirty) {
+    if (!cpu->accel->dirty) {
         run_on_cpu(cpu, do_hvf_cpu_synchronize_state, RUN_ON_CPU_NULL);
     }
 }
@@ -221,7 +221,7 @@ static void do_hvf_cpu_synchronize_set_dirty(CPUState *cpu,
                                              run_on_cpu_data arg)
 {
     /* QEMU state is the reference, push it to HVF now and on next entry */
-    cpu->vcpu_dirty = true;
+    cpu->accel->dirty = true;
 }
 
 static void hvf_cpu_synchronize_post_reset(CPUState *cpu)
@@ -402,7 +402,7 @@ static int hvf_init_vcpu(CPUState *cpu)
 #else
     r = hv_vcpu_create((hv_vcpuid_t *)&cpu->accel->fd, HV_VCPU_DEFAULT);
 #endif
-    cpu->vcpu_dirty = 1;
+    cpu->accel->dirty = true;
     assert_hvf_ok(r);
 
     cpu->accel->guest_debug_enabled = false;

include/hw/core/cpu.h

@@ -525,6 +525,7 @@ struct CPUState {
     uint32_t kvm_fetch_index;
     uint64_t dirty_pages;
     int kvm_vcpu_stats_fd;
+    bool vcpu_dirty;
 
     /* Use by accel-block: CPU is executing an ioctl() */
     QemuLockCnt in_ioctl_lock;
@@ -546,8 +547,6 @@ struct CPUState {
     int32_t exception_index;
 
     AccelCPUState *accel;
-    /* shared by kvm and hvf */
-    bool vcpu_dirty;
 
     /* Used to keep track of an outstanding cpu throttle thread for migration
      * autoconverge

include/sysemu/hvf_int.h

@@ -55,6 +55,7 @@ struct AccelCPUState {
     bool vtimer_masked;
     sigset_t unblock_ipi_mask;
     bool guest_debug_enabled;
+    bool dirty;
 };
 
 void assert_hvf_ok(hv_return_t ret);

target/arm/hvf/hvf.c

@@ -806,9 +806,9 @@ int hvf_put_registers(CPUState *cpu)
 
 static void flush_cpu_state(CPUState *cpu)
 {
-    if (cpu->vcpu_dirty) {
+    if (cpu->accel->dirty) {
         hvf_put_registers(cpu);
-        cpu->vcpu_dirty = false;
+        cpu->accel->dirty = false;
     }
 }
 

target/i386/hvf/hvf.c

@@ -419,9 +419,9 @@ int hvf_vcpu_exec(CPUState *cpu)
     }
 
     do {
-        if (cpu->vcpu_dirty) {
+        if (cpu->accel->dirty) {
             hvf_put_registers(cpu);
-            cpu->vcpu_dirty = false;
+            cpu->accel->dirty = false;
         }
 
         if (hvf_inject_interrupts(cpu)) {

target/i386/hvf/x86hvf.c

@@ -427,7 +427,7 @@ int hvf_process_events(CPUState *cs)
     X86CPU *cpu = X86_CPU(cs);
     CPUX86State *env = &cpu->env;
 
-    if (!cs->vcpu_dirty) {
+    if (!cs->accel->dirty) {
         /* light weight sync for CPU_INTERRUPT_HARD and IF_MASK */
         env->eflags = rreg(cs->accel->fd, HV_X86_RFLAGS);
     }