iotests: skip 042 with qcow which dosn't support zero sized images

[qemu.git] / qom / cpu.c

diff --git a/qom/cpu.c b/qom/cpu.c
index 484c49388d6d0f1c23b07fa613419501ead9c2e0..8757f033a05edf786594ff5b4693b4079400d5e4 100644 (file)
--- a/qom/cpu.c
+++ b/qom/cpu.c
@@ -22,14 +22,17 @@
 #include "qapi/error.h"
 #include "qemu-common.h"
 #include "qom/cpu.h"
-#include "sysemu/kvm.h"
+#include "sysemu/hw_accel.h"
 #include "qemu/notify.h"
 #include "qemu/log.h"
 #include "exec/log.h"
+#include "exec/cpu-common.h"
 #include "qemu/error-report.h"
 #include "sysemu/sysemu.h"
 #include "hw/qdev-properties.h"
-#include "trace.h"
+#include "trace-root.h"
+
+CPUInterruptHandler cpu_interrupt_handler;
 
 bool cpu_exists(int64_t id)
 {
@@ -113,17 +116,27 @@ static void cpu_common_get_memory_mapping(CPUState *cpu,
     error_setg(errp, "Obtaining memory mappings is unsupported on this CPU.");
 }
 
+/* Resetting the IRQ comes from across the code base so we take the
+ * BQL here if we need to.  cpu_interrupt assumes it is held.*/
 void cpu_reset_interrupt(CPUState *cpu, int mask)
 {
+    bool need_lock = !qemu_mutex_iothread_locked();
+
+    if (need_lock) {
+        qemu_mutex_lock_iothread();
+    }
     cpu->interrupt_request &= ~mask;
+    if (need_lock) {
+        qemu_mutex_unlock_iothread();
+    }
 }
 
 void cpu_exit(CPUState *cpu)
 {
-    cpu->exit_request = 1;
+    atomic_set(&cpu->exit_request, 1);
     /* Ensure cpu_exec will see the exit request after TCG has exited.  */
     smp_wmb();
-    cpu->tcg_exit_req = 1;
+    atomic_set(&cpu->icount_decr.u16.high, -1);
 }
 
 int cpu_write_elf32_qemunote(WriteCoreDumpFunction f, CPUState *cpu,
@@ -218,6 +231,17 @@ static bool cpu_common_exec_interrupt(CPUState *cpu, int int_req)
     return false;
 }
 
+GuestPanicInformation *cpu_get_crash_info(CPUState *cpu)
+{
+    CPUClass *cc = CPU_GET_CLASS(cpu);
+    GuestPanicInformation *res = NULL;
+
+    if (cc->get_crash_info) {
+        res = cc->get_crash_info(cpu);
+    }
+    return res;
+}
+
 void cpu_dump_state(CPUState *cpu, FILE *f, fprintf_function cpu_fprintf,
                     int flags)
 {
@@ -268,7 +292,12 @@ static void cpu_common_reset(CPUState *cpu)
     cpu->can_do_io = 1;
     cpu->exception_index = -1;
     cpu->crash_occurred = false;
-    memset(cpu->tb_jmp_cache, 0, TB_JMP_CACHE_SIZE * sizeof(void *));
+
+    if (tcg_enabled()) {
+        cpu_tb_jmp_cache_clear(cpu);
+
+        tcg_flush_softmmu_tlb(cpu);
+    }
 }
 
 static bool cpu_common_has_work(CPUState *cs)
@@ -341,8 +370,17 @@ static void cpu_common_realizefn(DeviceState *dev, Error **errp)
     trace_init_vcpu(cpu);
 }
 
+static void cpu_common_unrealizefn(DeviceState *dev, Error **errp)
+{
+    CPUState *cpu = CPU(dev);
+    /* NOTE: latest generic point before the cpu is fully unrealized */
+    trace_fini_vcpu(cpu);
+    cpu_exec_unrealizefn(cpu);
+}
+
 static void cpu_common_initfn(Object *obj)
 {
+    uint32_t count;
     CPUState *cpu = CPU(obj);
     CPUClass *cc = CPU_GET_CLASS(obj);
 
@@ -356,12 +394,19 @@ static void cpu_common_initfn(Object *obj)
     qemu_mutex_init(&cpu->work_mutex);
     QTAILQ_INIT(&cpu->breakpoints);
     QTAILQ_INIT(&cpu->watchpoints);
-    bitmap_zero(cpu->trace_dstate, TRACE_VCPU_EVENT_COUNT);
+
+    count = trace_get_vcpu_event_count();
+    if (count) {
+        cpu->trace_dstate = bitmap_new(count);
+    }
+
+    cpu_exec_initfn(cpu);
 }
 
 static void cpu_common_finalize(Object *obj)
 {
-    cpu_exec_exit(CPU(obj));
+    CPUState *cpu = CPU(obj);
+    g_free(cpu->trace_dstate);
 }
 
 static int64_t cpu_common_get_arch_id(CPUState *cpu)
@@ -369,6 +414,22 @@ static int64_t cpu_common_get_arch_id(CPUState *cpu)
     return cpu->cpu_index;
 }
 
+static vaddr cpu_adjust_watchpoint_address(CPUState *cpu, vaddr addr, int len)
+{
+    return addr;
+}
+
+static void generic_handle_interrupt(CPUState *cpu, int mask)
+{
+    cpu->interrupt_request |= mask;
+
+    if (!qemu_cpu_is_self(cpu)) {
+        qemu_cpu_kick(cpu);
+    }
+}
+
+CPUInterruptHandler cpu_interrupt_handler = generic_handle_interrupt;
+
 static void cpu_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
@@ -393,12 +454,15 @@ static void cpu_class_init(ObjectClass *klass, void *data)
     k->cpu_exec_enter = cpu_common_noop;
     k->cpu_exec_exit = cpu_common_noop;
     k->cpu_exec_interrupt = cpu_common_exec_interrupt;
+    k->adjust_watchpoint_address = cpu_adjust_watchpoint_address;
+    set_bit(DEVICE_CATEGORY_CPU, dc->categories);
     dc->realize = cpu_common_realizefn;
+    dc->unrealize = cpu_common_unrealizefn;
     /*
      * Reason: CPUs still need special care by board code: wiring up
      * IRQs, adding reset handlers, halting non-first CPUs, ...
      */
-    dc->cannot_instantiate_with_device_add_yet = true;
+    dc->user_creatable = false;
 }
 
 static const TypeInfo cpu_type_info = {