| 1 | // SPDX-License-Identifier: GPL-2.0 |
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| 2 | #include <linux/ftrace.h> |
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| 3 | #include <linux/tracepoint.h> |
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| 4 | #include <linux/kernel.h> |
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| 5 | #include <linux/module.h> |
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| 6 | #include <linux/init.h> |
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| 7 | #include <linux/rv.h> |
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| 8 | #include <rv/instrumentation.h> |
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| 9 | #include <rv/da_monitor.h> |
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| 10 | |
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| 11 | #define MODULE_NAME "wip" |
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| 12 | |
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| 13 | #include <trace/events/rv.h> |
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| 14 | #include <trace/events/sched.h> |
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| 15 | #include <trace/events/preemptirq.h> |
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| 16 | |
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| 17 | #include "wip.h" |
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| 18 | |
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| 19 | static struct rv_monitor rv_wip; |
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| 20 | DECLARE_DA_MON_PER_CPU(wip, unsigned char); |
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| 21 | |
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| 22 | static void handle_preempt_disable(void *data, unsigned long ip, unsigned long parent_ip) |
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| 23 | { |
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| 24 | da_handle_event_wip(event: preempt_disable_wip); |
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| 25 | } |
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| 26 | |
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| 27 | static void handle_preempt_enable(void *data, unsigned long ip, unsigned long parent_ip) |
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| 28 | { |
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| 29 | da_handle_start_event_wip(event: preempt_enable_wip); |
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| 30 | } |
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| 31 | |
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| 32 | static void handle_sched_waking(void *data, struct task_struct *task) |
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| 33 | { |
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| 34 | da_handle_event_wip(event: sched_waking_wip); |
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| 35 | } |
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| 36 | |
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| 37 | static int enable_wip(void) |
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| 38 | { |
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| 39 | int retval; |
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| 40 | |
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| 41 | retval = da_monitor_init_wip(); |
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| 42 | if (retval) |
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| 43 | return retval; |
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| 44 | |
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| 45 | rv_attach_trace_probe("wip" , preempt_enable, handle_preempt_enable); |
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| 46 | rv_attach_trace_probe("wip" , sched_waking, handle_sched_waking); |
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| 47 | rv_attach_trace_probe("wip" , preempt_disable, handle_preempt_disable); |
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| 48 | |
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| 49 | return 0; |
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| 50 | } |
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| 51 | |
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| 52 | static void disable_wip(void) |
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| 53 | { |
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| 54 | rv_wip.enabled = 0; |
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| 55 | |
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| 56 | rv_detach_trace_probe("wip" , preempt_disable, handle_preempt_disable); |
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| 57 | rv_detach_trace_probe("wip" , preempt_enable, handle_preempt_enable); |
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| 58 | rv_detach_trace_probe("wip" , sched_waking, handle_sched_waking); |
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| 59 | |
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| 60 | da_monitor_destroy_wip(); |
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| 61 | } |
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| 62 | |
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| 63 | static struct rv_monitor rv_wip = { |
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| 64 | .name = "wip" , |
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| 65 | .description = "wakeup in preemptive per-cpu testing monitor." , |
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| 66 | .enable = enable_wip, |
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| 67 | .disable = disable_wip, |
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| 68 | .reset = da_monitor_reset_all_wip, |
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| 69 | .enabled = 0, |
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| 70 | }; |
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| 71 | |
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| 72 | static int __init register_wip(void) |
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| 73 | { |
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| 74 | rv_register_monitor(monitor: &rv_wip); |
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| 75 | return 0; |
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| 76 | } |
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| 77 | |
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| 78 | static void __exit unregister_wip(void) |
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| 79 | { |
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| 80 | rv_unregister_monitor(monitor: &rv_wip); |
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| 81 | } |
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| 82 | |
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| 83 | module_init(register_wip); |
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| 84 | module_exit(unregister_wip); |
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| 85 | |
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| 86 | MODULE_LICENSE("GPL" ); |
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| 87 | MODULE_AUTHOR("Daniel Bristot de Oliveira <bristot@kernel.org>" ); |
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| 88 | MODULE_DESCRIPTION("wip: wakeup in preemptive - per-cpu sample monitor." ); |
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| 89 | |
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