#include "qemu/typedefs.h"
#include "qemu-common.h"
#include "qemu/notify.h"
+#include "qemu/host-utils.h"
+
+#define NANOSECONDS_PER_SECOND 1000000000LL
/* timers */
* is suspended, and it will reflect system time changes the host may
* undergo (e.g. due to NTP). The host clock has the same precision as
* the virtual clock.
+ *
+ * @QEMU_CLOCK_VIRTUAL_RT: realtime clock used for icount warp
+ *
+ * Outside icount mode, this clock is the same as @QEMU_CLOCK_VIRTUAL.
+ * In icount mode, this clock counts nanoseconds while the virtual
+ * machine is running. It is used to increase @QEMU_CLOCK_VIRTUAL
+ * while the CPUs are sleeping and thus not executing instructions.
*/
typedef enum {
QEMU_CLOCK_REALTIME = 0,
QEMU_CLOCK_VIRTUAL = 1,
QEMU_CLOCK_HOST = 2,
+ QEMU_CLOCK_VIRTUAL_RT = 3,
QEMU_CLOCK_MAX
} QEMUClockType;
* @enabled: true to enable, false to disable
*
* Enable or disable a clock
+ * Disabling the clock will wait for related timerlists to stop
+ * executing qemu_run_timers. Thus, this functions should not
+ * be used from the callback of a timer that is based on @clock.
+ * Doing so would cause a deadlock.
+ *
+ * Caller should hold BQL.
*/
void qemu_clock_enable(QEMUClockType type, bool enabled);
*/
/**
- * timer_init:
+ * timer_init_tl:
* @ts: the timer to be initialised
* @timer_list: the timer list to attach the timer to
- * @scale: the scale value for the tiemr
+ * @scale: the scale value for the timer
* @cb: the callback to be called when the timer expires
* @opaque: the opaque pointer to be passed to the callback
*
* You need not call an explicit deinit call. Simply make
* sure it is not on a list with timer_del.
*/
-void timer_init(QEMUTimer *ts,
- QEMUTimerList *timer_list, int scale,
- QEMUTimerCB *cb, void *opaque);
+void timer_init_tl(QEMUTimer *ts,
+ QEMUTimerList *timer_list, int scale,
+ QEMUTimerCB *cb, void *opaque);
+
+/**
+ * timer_init:
+ * @type: the clock to associate with the timer
+ * @scale: the scale value for the timer
+ * @cb: the callback to call when the timer expires
+ * @opaque: the opaque pointer to pass to the callback
+ *
+ * Initialize a timer with the given scale on the default timer list
+ * associated with the clock.
+ *
+ * You need not call an explicit deinit call. Simply make
+ * sure it is not on a list with timer_del.
+ */
+static inline void timer_init(QEMUTimer *ts, QEMUClockType type, int scale,
+ QEMUTimerCB *cb, void *opaque)
+{
+ timer_init_tl(ts, main_loop_tlg.tl[type], scale, cb, opaque);
+}
+
+/**
+ * timer_init_ns:
+ * @type: the clock to associate with the timer
+ * @cb: the callback to call when the timer expires
+ * @opaque: the opaque pointer to pass to the callback
+ *
+ * Initialize a timer with nanosecond scale on the default timer list
+ * associated with the clock.
+ *
+ * You need not call an explicit deinit call. Simply make
+ * sure it is not on a list with timer_del.
+ */
+static inline void timer_init_ns(QEMUTimer *ts, QEMUClockType type,
+ QEMUTimerCB *cb, void *opaque)
+{
+ timer_init(ts, type, SCALE_NS, cb, opaque);
+}
+
+/**
+ * timer_init_us:
+ * @type: the clock to associate with the timer
+ * @cb: the callback to call when the timer expires
+ * @opaque: the opaque pointer to pass to the callback
+ *
+ * Initialize a timer with microsecond scale on the default timer list
+ * associated with the clock.
+ *
+ * You need not call an explicit deinit call. Simply make
+ * sure it is not on a list with timer_del.
+ */
+static inline void timer_init_us(QEMUTimer *ts, QEMUClockType type,
+ QEMUTimerCB *cb, void *opaque)
+{
+ timer_init(ts, type, SCALE_US, cb, opaque);
+}
+
+/**
+ * timer_init_ms:
+ * @type: the clock to associate with the timer
+ * @cb: the callback to call when the timer expires
+ * @opaque: the opaque pointer to pass to the callback
+ *
+ * Initialize a timer with millisecond scale on the default timer list
+ * associated with the clock.
+ *
+ * You need not call an explicit deinit call. Simply make
+ * sure it is not on a list with timer_del.
+ */
+static inline void timer_init_ms(QEMUTimer *ts, QEMUClockType type,
+ QEMUTimerCB *cb, void *opaque)
+{
+ timer_init(ts, type, SCALE_MS, cb, opaque);
+}
/**
* timer_new_tl:
* @timer_list: the timer list to attach the timer to
- * @scale: the scale value for the tiemr
+ * @scale: the scale value for the timer
* @cb: the callback to be called when the timer expires
* @opaque: the opaque pointer to be passed to the callback
*
void *opaque)
{
QEMUTimer *ts = g_malloc0(sizeof(QEMUTimer));
- timer_init(ts, timer_list, scale, cb, opaque);
+ timer_init_tl(ts, timer_list, scale, cb, opaque);
return ts;
}
/**
* timer_new:
* @type: the clock type to use
- * @scale: the scale value for the tiemr
+ * @scale: the scale value for the timer
* @cb: the callback to be called when the timer expires
* @opaque: the opaque pointer to be passed to the callback
*
return timer_new(type, SCALE_MS, cb, opaque);
}
+/**
+ * timer_deinit:
+ * @ts: the timer to be de-initialised
+ *
+ * Deassociate the timer from any timerlist. You should
+ * call timer_del before. After this call, any further
+ * timer_del call cannot cause dangling pointer accesses
+ * even if the previously used timerlist is freed.
+ */
+void timer_deinit(QEMUTimer *ts);
+
/**
* timer_free:
* @ts: the timer
*/
void timer_mod_ns(QEMUTimer *ts, int64_t expire_time);
+/**
+ * timer_mod_anticipate_ns:
+ * @ts: the timer
+ * @expire_time: the expiry time in nanoseconds
+ *
+ * Modify a timer to expire at @expire_time or the current time,
+ * whichever comes earlier.
+ *
+ * This function is thread-safe but the timer and its timer list must not be
+ * freed while this function is running.
+ */
+void timer_mod_anticipate_ns(QEMUTimer *ts, int64_t expire_time);
+
/**
* timer_mod:
* @ts: the timer
*/
void timer_mod(QEMUTimer *ts, int64_t expire_timer);
+/**
+ * timer_mod_anticipate:
+ * @ts: the timer
+ * @expire_time: the expiry time in nanoseconds
+ *
+ * Modify a timer to expire at @expire_time or the current time, whichever
+ * comes earlier, taking into account the scale associated with the timer.
+ *
+ * This function is thread-safe but the timer and its timer list must not be
+ * freed while this function is running.
+ */
+void timer_mod_anticipate(QEMUTimer *ts, int64_t expire_time);
+
/**
* timer_pending:
* @ts: the timer
void init_clocks(void);
int64_t cpu_get_ticks(void);
+/* Caller must hold BQL */
void cpu_enable_ticks(void);
+/* Caller must hold BQL */
void cpu_disable_ticks(void);
static inline int64_t get_ticks_per_sec(void)
return 1000000000LL;
}
+static inline int64_t get_max_clock_jump(void)
+{
+ /* This should be small enough to prevent excessive interrupts from being
+ * generated by the RTC on clock jumps, but large enough to avoid frequent
+ * unnecessary resets in idle VMs.
+ */
+ return 60 * get_ticks_per_sec();
+}
+
/*
* Low level clock functions
*/
#endif
/* icount */
+int64_t cpu_get_icount_raw(void);
int64_t cpu_get_icount(void);
int64_t cpu_get_clock(void);
+int64_t cpu_icount_to_ns(int64_t icount);
/*******************************************/
/* host CPU ticks (if available) */
#if defined(_ARCH_PPC)
-static inline int64_t cpu_get_real_ticks(void)
+static inline int64_t cpu_get_host_ticks(void)
{
int64_t retval;
#ifdef _ARCH_PPC64
#elif defined(__i386__)
-static inline int64_t cpu_get_real_ticks(void)
+static inline int64_t cpu_get_host_ticks(void)
{
int64_t val;
asm volatile ("rdtsc" : "=A" (val));
#elif defined(__x86_64__)
-static inline int64_t cpu_get_real_ticks(void)
+static inline int64_t cpu_get_host_ticks(void)
{
uint32_t low,high;
int64_t val;
#elif defined(__hppa__)
-static inline int64_t cpu_get_real_ticks(void)
+static inline int64_t cpu_get_host_ticks(void)
{
int val;
asm volatile ("mfctl %%cr16, %0" : "=r"(val));
#elif defined(__ia64)
-static inline int64_t cpu_get_real_ticks(void)
+static inline int64_t cpu_get_host_ticks(void)
{
int64_t val;
asm volatile ("mov %0 = ar.itc" : "=r"(val) :: "memory");
#elif defined(__s390__)
-static inline int64_t cpu_get_real_ticks(void)
+static inline int64_t cpu_get_host_ticks(void)
{
int64_t val;
asm volatile("stck 0(%1)" : "=m" (val) : "a" (&val) : "cc");
#elif defined(__sparc__)
-static inline int64_t cpu_get_real_ticks (void)
+static inline int64_t cpu_get_host_ticks (void)
{
#if defined(_LP64)
uint64_t rval;
: "=r" (value)); \
}
-static inline int64_t cpu_get_real_ticks(void)
+static inline int64_t cpu_get_host_ticks(void)
{
/* On kernels >= 2.6.25 rdhwr <reg>, $2 and $3 are emulated */
uint32_t count;
#elif defined(__alpha__)
-static inline int64_t cpu_get_real_ticks(void)
+static inline int64_t cpu_get_host_ticks(void)
{
uint64_t cc;
uint32_t cur, ofs;
/* The host CPU doesn't have an easily accessible cycle counter.
Just return a monotonically increasing value. This will be
totally wrong, but hopefully better than nothing. */
-static inline int64_t cpu_get_real_ticks (void)
+static inline int64_t cpu_get_host_ticks (void)
{
static int64_t ticks = 0;
return ticks++;
#ifdef CONFIG_PROFILER
static inline int64_t profile_getclock(void)
{
- return cpu_get_real_ticks();
+ return get_clock();
}
-extern int64_t qemu_time, qemu_time_start;
-extern int64_t tlb_flush_time;
+extern int64_t tcg_time;
extern int64_t dev_time;
#endif
projects / qemu.git / blobdiff