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https://github.com/projectacrn/acrn-hypervisor.git
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918403f925
This patch is to enhance the feature of "interrupt storm mitigation"; when interrupt storm happens on one UOS it should keep as smaller effect to SOS as possible. Add variables in PTdev entry & VM, used to record one UOS's pass-thru devices' interrupt data; add a function to collect the data. Also add a timer used to delay UOS pass-thru devices' interrupt injection if an "interrupt storm" detected by SOS. Tracked-On: #866 Signed-off-by: Minggui Cao <minggui.cao@intel.com> Reviewed-by: Li Fei1 <fei1.li@intel.com> Acked-by: Anthony Xu <anthony.xu@intel.com>
68 lines
1.6 KiB
C
68 lines
1.6 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#ifndef TIMER_H
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#define TIMER_H
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typedef void (*timer_handle_t)(void *data);
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enum tick_mode {
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TICK_MODE_ONESHOT = 0,
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TICK_MODE_PERIODIC,
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};
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struct per_cpu_timers {
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struct list_head timer_list; /* it's for runtime active timer list */
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};
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struct hv_timer {
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struct list_head node; /* link all timers */
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int mode; /* timer mode: one-shot or periodic */
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uint64_t fire_tsc; /* tsc deadline to interrupt */
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uint64_t period_in_cycle; /* period of the periodic timer in unit of TSC cycles */
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timer_handle_t func; /* callback if time reached */
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void *priv_data; /* func private data */
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};
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/*
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* Don't initialize a timer twice if it has been add to the timer list
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* after call add_timer. If u want, delete the timer from the list first.
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*/
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static inline void initialize_timer(struct hv_timer *timer,
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timer_handle_t func,
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void *priv_data,
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uint64_t fire_tsc,
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int mode,
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uint64_t period_in_cycle)
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{
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if (timer != NULL) {
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timer->func = func;
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timer->priv_data = priv_data;
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timer->fire_tsc = fire_tsc;
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timer->mode = mode;
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timer->period_in_cycle = period_in_cycle;
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INIT_LIST_HEAD(&timer->node);
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}
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}
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static inline bool timer_expired(const struct hv_timer *timer)
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{
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return ((timer->fire_tsc == 0UL) || (rdtsc() >= timer->fire_tsc));
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}
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/*
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* Don't call add_timer/del_timer in the timer callback function.
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*/
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int add_timer(struct hv_timer *timer);
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void del_timer(struct hv_timer *timer);
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void timer_init(void);
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void timer_cleanup(void);
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void check_tsc(void);
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void calibrate_tsc(void);
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#endif /* TIMER_H */
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