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34 #ifndef _RTE_SPINLOCK_X86_64_H_
35 #define _RTE_SPINLOCK_X86_64_H_
41 #include "generic/rte_spinlock.h"
43 #include "rte_cpuflags.h"
44 #include "rte_branch_prediction.h"
45 #include "rte_common.h"
46 #include "rte_pause.h"
48 #define RTE_RTM_MAX_RETRIES (10)
49 #define RTE_XABORT_LOCK_BUSY (0xff)
51 #ifndef RTE_FORCE_INTRINSICS
53 rte_spinlock_lock(rte_spinlock_t *sl)
58 "xchg %[locked], %[lv]\n"
63 "cmpl $0, %[locked]\n"
67 : [locked] "=m" (sl->locked), [lv] "=q" (lock_val)
73 rte_spinlock_unlock (rte_spinlock_t *sl)
77 "xchg %[locked], %[ulv]\n"
78 : [locked] "=m" (sl->locked), [ulv] "=q" (unlock_val)
79 : "[ulv]" (unlock_val)
84 rte_spinlock_trylock (rte_spinlock_t *sl)
89 "xchg %[locked], %[lockval]"
90 : [locked] "=m" (sl->locked), [lockval] "=q" (lockval)
91 : "[lockval]" (lockval)
98 extern uint8_t rte_rtm_supported;
100 static inline int rte_tm_supported(void)
102 return rte_rtm_supported;
106 rte_try_tm(volatile int *lock)
108 if (!rte_rtm_supported)
111 int retries = RTE_RTM_MAX_RETRIES;
113 while (likely(retries--)) {
115 unsigned int status = rte_xbegin();
117 if (likely(RTE_XBEGIN_STARTED == status)) {
119 rte_xabort(RTE_XABORT_LOCK_BUSY);
126 if ((status & RTE_XABORT_EXPLICIT) &&
127 (RTE_XABORT_CODE(status) == RTE_XABORT_LOCK_BUSY))
130 if ((status & RTE_XABORT_RETRY) == 0) /* do not retry */
137 rte_spinlock_lock_tm(rte_spinlock_t *sl)
139 if (likely(rte_try_tm(&sl->locked)))
142 rte_spinlock_lock(sl); /* fall-back */
146 rte_spinlock_trylock_tm(rte_spinlock_t *sl)
148 if (likely(rte_try_tm(&sl->locked)))
151 return rte_spinlock_trylock(sl);
155 rte_spinlock_unlock_tm(rte_spinlock_t *sl)
157 if (unlikely(sl->locked))
158 rte_spinlock_unlock(sl);
164 rte_spinlock_recursive_lock_tm(rte_spinlock_recursive_t *slr)
166 if (likely(rte_try_tm(&slr->sl.locked)))
169 rte_spinlock_recursive_lock(slr); /* fall-back */
173 rte_spinlock_recursive_unlock_tm(rte_spinlock_recursive_t *slr)
175 if (unlikely(slr->sl.locked))
176 rte_spinlock_recursive_unlock(slr);
182 rte_spinlock_recursive_trylock_tm(rte_spinlock_recursive_t *slr)
184 if (likely(rte_try_tm(&slr->sl.locked)))
187 return rte_spinlock_recursive_trylock(slr);
195 #endif /* _RTE_SPINLOCK_X86_64_H_ */