Merge remote-tracking branch 'remotes/kraxel/tags/vga-20200528-pull-request' into...

[mirror_qemu.git] / cpus.c

diff --git a/cpus.c b/cpus.c
index b472378b702127c97ba402b6cc41157803b32934..5670c96bcfa62713c97164f88f998f5f7421cf98 100644 (file)
--- a/cpus.c
+++ b/cpus.c
@@ -25,6 +25,7 @@
 #include "qemu/osdep.h"
 #include "qemu-common.h"
 #include "qemu/config-file.h"
+#include "qemu/cutils.h"
 #include "migration/vmstate.h"
 #include "monitor/monitor.h"
 #include "qapi/error.h"
@@ -53,7 +54,7 @@
 #include "qemu/bitmap.h"
 #include "qemu/seqlock.h"
 #include "qemu/guest-random.h"
-#include "tcg.h"
+#include "tcg/tcg.h"
 #include "hw/nmi.h"
 #include "sysemu/replay.h"
 #include "sysemu/runstate.h"
@@ -797,40 +798,47 @@ void cpu_ticks_init(void)
 
 void configure_icount(QemuOpts *opts, Error **errp)
 {
-    const char *option;
-    char *rem_str = NULL;
+    const char *option = qemu_opt_get(opts, "shift");
+    bool sleep = qemu_opt_get_bool(opts, "sleep", true);
+    bool align = qemu_opt_get_bool(opts, "align", false);
+    long time_shift = -1;
 
-    option = qemu_opt_get(opts, "shift");
-    if (!option) {
-        if (qemu_opt_get(opts, "align") != NULL) {
-            error_setg(errp, "Please specify shift option when using align");
-        }
+    if (!option && qemu_opt_get(opts, "align")) {
+        error_setg(errp, "Please specify shift option when using align");
         return;
     }
 
-    icount_sleep = qemu_opt_get_bool(opts, "sleep", true);
-    if (icount_sleep) {
-        timers_state.icount_warp_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL_RT,
-                                         icount_timer_cb, NULL);
-    }
-
-    icount_align_option = qemu_opt_get_bool(opts, "align", false);
-
-    if (icount_align_option && !icount_sleep) {
+    if (align && !sleep) {
         error_setg(errp, "align=on and sleep=off are incompatible");
+        return;
     }
+
     if (strcmp(option, "auto") != 0) {
-        errno = 0;
-        timers_state.icount_time_shift = strtol(option, &rem_str, 0);
-        if (errno != 0 || *rem_str != '\0' || !strlen(option)) {
+        if (qemu_strtol(option, NULL, 0, &time_shift) < 0
+            || time_shift < 0 || time_shift > MAX_ICOUNT_SHIFT) {
             error_setg(errp, "icount: Invalid shift value");
+            return;
         }
-        use_icount = 1;
-        return;
     } else if (icount_align_option) {
         error_setg(errp, "shift=auto and align=on are incompatible");
+        return;
     } else if (!icount_sleep) {
         error_setg(errp, "shift=auto and sleep=off are incompatible");
+        return;
+    }
+
+    icount_sleep = sleep;
+    if (icount_sleep) {
+        timers_state.icount_warp_timer = timer_new_ns(QEMU_CLOCK_VIRTUAL_RT,
+                                         icount_timer_cb, NULL);
+    }
+
+    icount_align_option = align;
+
+    if (time_shift >= 0) {
+        timers_state.icount_time_shift = time_shift;
+        use_icount = 1;
+        return;
     }
 
     use_icount = 2;
@@ -1026,9 +1034,9 @@ static int do_vm_stop(RunState state, bool send_stop)
     int ret = 0;
 
     if (runstate_is_running()) {
+        runstate_set(state);
         cpu_disable_ticks();
         pause_all_vcpus();
-        runstate_set(state);
         vm_state_notify(0, state);
         if (send_stop) {
             qapi_event_send_stop();
@@ -1316,6 +1324,10 @@ static int64_t tcg_get_icount_limit(void)
          */
         deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_VIRTUAL,
                                               QEMU_TIMER_ATTR_ALL);
+        /* Check realtime timers, because they help with input processing */
+        deadline = qemu_soonest_timeout(deadline,
+                qemu_clock_deadline_ns_all(QEMU_CLOCK_REALTIME,
+                                           QEMU_TIMER_ATTR_ALL));
 
         /* Maintain prior (possibly buggy) behaviour where if no deadline
          * was set (as there is no QEMU_CLOCK_VIRTUAL timer) or it is more than
@@ -1835,6 +1847,11 @@ void qemu_mutex_unlock_iothread(void)
     qemu_mutex_unlock(&qemu_global_mutex);
 }
 
+void qemu_cond_wait_iothread(QemuCond *cond)
+{
+    qemu_cond_wait(cond, &qemu_global_mutex);
+}
+
 static bool all_vcpus_paused(void)
 {
     CPUState *cpu;
@@ -1890,6 +1907,10 @@ void resume_all_vcpus(void)
 {
     CPUState *cpu;
 
+    if (!runstate_is_running()) {
+        return;
+    }
+
     qemu_clock_enable(QEMU_CLOCK_VIRTUAL, true);
     CPU_FOREACH(cpu) {
         cpu_resume(cpu);