From 5febf432df1cfa5b25d99b54c32103fafbdd0eb9 Mon Sep 17 00:00:00 2001 From: Miguel Ojeda Date: Sun, 16 Aug 2026 15:32:33 +0200 Subject: kbuild: rust: keep Rust objects out of Clang LTO with inline helpers Under `CONFIG_LTO_CLANG` + `CONFIG_RUST_INLINE_HELPERS`, one may hit `objtool` errors such as: vmlinux.o: error: objtool: _R..._3Gsp4boot+0xd6a: can't find jump dest instruction at .text._R..._3Gsp4boot+0x1dfd The reason is that in such builds, the Clang invocation that compiles the combined Rust plus helpers bitcode emits LLVM bitcode (again) -- the final code generation happens in the linker's LTO step, which the `-mllvm` trap options passed to Clang do not reach. This, in turn, means that unreachable traps are missing, and the impossible paths do not merely fallthrough to the next symbol, but past the end of their own section, since LTO builds place each function in its own section. Thus filter `CC_FLAGS_LTO` out of the Clang invocation, so that it always emits machine code directly, with the traps in place. Assisted-by: LLM Cc: Gary Guo Cc: Boqun Feng Cc: Alice Ryhl Cc: Matthew Maurer Cc: Josh Poimboeuf Cc: Peter Zijlstra Cc: stable@vger.kernel.org Fixes: 3a2486cc1da5 ("kbuild: rust: provide an option to inline C helpers into Rust") Acked-by: Gary Guo Link: https://patch.msgid.link/20260816133233.197500-2-ojeda@kernel.org Signed-off-by: Miguel Ojeda --- include/trace/events/power.h | 531 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 531 insertions(+) create mode 100644 include/trace/events/power.h (limited to 'include/trace/events/power.h') diff --git a/include/trace/events/power.h b/include/trace/events/power.h new file mode 100644 index 000000000..370f8df2f --- /dev/null +++ b/include/trace/events/power.h @@ -0,0 +1,531 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#undef TRACE_SYSTEM +#define TRACE_SYSTEM power + +#if !defined(_TRACE_POWER_H) || defined(TRACE_HEADER_MULTI_READ) +#define _TRACE_POWER_H + +#include +#include +#include +#include +#include + +#define TPS(x) tracepoint_string(x) + +DECLARE_EVENT_CLASS(cpu, + + TP_PROTO(unsigned int state, unsigned int cpu_id), + + TP_ARGS(state, cpu_id), + + TP_STRUCT__entry( + __field( u32, state ) + __field( u32, cpu_id ) + ), + + TP_fast_assign( + __entry->state = state; + __entry->cpu_id = cpu_id; + ), + + TP_printk("state=%lu cpu_id=%lu", (unsigned long)__entry->state, + (unsigned long)__entry->cpu_id) +); + +DEFINE_EVENT(cpu, cpu_idle, + + TP_PROTO(unsigned int state, unsigned int cpu_id), + + TP_ARGS(state, cpu_id) +); + +TRACE_EVENT(cpu_idle_miss, + + TP_PROTO(unsigned int cpu_id, unsigned int state, bool below), + + TP_ARGS(cpu_id, state, below), + + TP_STRUCT__entry( + __field(u32, cpu_id) + __field(u32, state) + __field(bool, below) + ), + + TP_fast_assign( + __entry->cpu_id = cpu_id; + __entry->state = state; + __entry->below = below; + ), + + TP_printk("cpu_id=%lu state=%lu type=%s", (unsigned long)__entry->cpu_id, + (unsigned long)__entry->state, (__entry->below)?"below":"above") +); + +#ifdef CONFIG_ARM_PSCI_CPUIDLE +DECLARE_EVENT_CLASS(psci_domain_idle, + + TP_PROTO(unsigned int cpu_id, unsigned int state, bool s2idle), + + TP_ARGS(cpu_id, state, s2idle), + + TP_STRUCT__entry( + __field(u32, cpu_id) + __field(u32, state) + __field(bool, s2idle) + ), + + TP_fast_assign( + __entry->cpu_id = cpu_id; + __entry->state = state; + __entry->s2idle = s2idle; + ), + + TP_printk("cpu_id=%lu state=0x%lx is_s2idle=%s", + (unsigned long)__entry->cpu_id, (unsigned long)__entry->state, + (__entry->s2idle)?"yes":"no") +); + +DEFINE_EVENT(psci_domain_idle, psci_domain_idle_enter, + + TP_PROTO(unsigned int cpu_id, unsigned int state, bool s2idle), + + TP_ARGS(cpu_id, state, s2idle) +); + +DEFINE_EVENT(psci_domain_idle, psci_domain_idle_exit, + + TP_PROTO(unsigned int cpu_id, unsigned int state, bool s2idle), + + TP_ARGS(cpu_id, state, s2idle) +); +#endif + +TRACE_EVENT(pstate_sample, + + TP_PROTO(u32 core_busy, + u32 scaled_busy, + u32 from, + u32 to, + u64 mperf, + u64 aperf, + u64 tsc, + u32 freq, + u32 io_boost + ), + + TP_ARGS(core_busy, + scaled_busy, + from, + to, + mperf, + aperf, + tsc, + freq, + io_boost + ), + + TP_STRUCT__entry( + __field(u32, core_busy) + __field(u32, scaled_busy) + __field(u32, from) + __field(u32, to) + __field(u64, mperf) + __field(u64, aperf) + __field(u64, tsc) + __field(u32, freq) + __field(u32, io_boost) + ), + + TP_fast_assign( + __entry->core_busy = core_busy; + __entry->scaled_busy = scaled_busy; + __entry->from = from; + __entry->to = to; + __entry->mperf = mperf; + __entry->aperf = aperf; + __entry->tsc = tsc; + __entry->freq = freq; + __entry->io_boost = io_boost; + ), + + TP_printk("core_busy=%lu scaled=%lu from=%lu to=%lu mperf=%llu aperf=%llu tsc=%llu freq=%lu io_boost=%lu", + (unsigned long)__entry->core_busy, + (unsigned long)__entry->scaled_busy, + (unsigned long)__entry->from, + (unsigned long)__entry->to, + (unsigned long long)__entry->mperf, + (unsigned long long)__entry->aperf, + (unsigned long long)__entry->tsc, + (unsigned long)__entry->freq, + (unsigned long)__entry->io_boost + ) + +); + +/* This file can get included multiple times, TRACE_HEADER_MULTI_READ at top */ +#ifndef _PWR_EVENT_AVOID_DOUBLE_DEFINING +#define _PWR_EVENT_AVOID_DOUBLE_DEFINING + +#define PWR_EVENT_EXIT -1 +#endif + +#define pm_verb_symbolic(event) \ + __print_symbolic(event, \ + { PM_EVENT_SUSPEND, "suspend" }, \ + { PM_EVENT_RESUME, "resume" }, \ + { PM_EVENT_FREEZE, "freeze" }, \ + { PM_EVENT_QUIESCE, "quiesce" }, \ + { PM_EVENT_HIBERNATE, "hibernate" }, \ + { PM_EVENT_THAW, "thaw" }, \ + { PM_EVENT_RESTORE, "restore" }, \ + { PM_EVENT_RECOVER, "recover" }, \ + { PM_EVENT_POWEROFF, "poweroff" }) + +DEFINE_EVENT(cpu, cpu_frequency, + + TP_PROTO(unsigned int frequency, unsigned int cpu_id), + + TP_ARGS(frequency, cpu_id) +); + +TRACE_EVENT(cpu_frequency_limits, + + TP_PROTO(struct cpufreq_policy *policy), + + TP_ARGS(policy), + + TP_STRUCT__entry( + __field(u32, min_freq) + __field(u32, max_freq) + __field(u32, cpu_id) + ), + + TP_fast_assign( + __entry->min_freq = policy->min; + __entry->max_freq = policy->max; + __entry->cpu_id = policy->cpu; + ), + + TP_printk("min=%lu max=%lu cpu_id=%lu", + (unsigned long)__entry->min_freq, + (unsigned long)__entry->max_freq, + (unsigned long)__entry->cpu_id) +); + +#ifdef CONFIG_PM_SLEEP +TRACE_EVENT(device_pm_callback_start, + + TP_PROTO(struct device *dev, const char *pm_ops, int event), + + TP_ARGS(dev, pm_ops, event), + + TP_STRUCT__entry( + __string(device, dev_name(dev)) + __string(driver, dev_driver_string(dev)) + __string(parent, dev->parent ? dev_name(dev->parent) : "none") + __string(pm_ops, pm_ops ? pm_ops : "none ") + __field(int, event) + ), + + TP_fast_assign( + __assign_str(device); + __assign_str(driver); + __assign_str(parent); + __assign_str(pm_ops); + __entry->event = event; + ), + + TP_printk("%s %s, parent: %s, %s[%s]", __get_str(driver), + __get_str(device), __get_str(parent), __get_str(pm_ops), + pm_verb_symbolic(__entry->event)) +); + +TRACE_EVENT(device_pm_callback_end, + + TP_PROTO(struct device *dev, int error), + + TP_ARGS(dev, error), + + TP_STRUCT__entry( + __string(device, dev_name(dev)) + __string(driver, dev_driver_string(dev)) + __field(int, error) + ), + + TP_fast_assign( + __assign_str(device); + __assign_str(driver); + __entry->error = error; + ), + + TP_printk("%s %s, err=%d", + __get_str(driver), __get_str(device), __entry->error) +); +#endif + +TRACE_EVENT(suspend_resume, + + TP_PROTO(const char *action, int val, bool start), + + TP_ARGS(action, val, start), + + TP_STRUCT__entry( + __field(const char *, action) + __field(int, val) + __field(bool, start) + ), + + TP_fast_assign( + __entry->action = action; + __entry->val = val; + __entry->start = start; + ), + + TP_printk("%s[%u] %s", __entry->action, (unsigned int)__entry->val, + (__entry->start)?"begin":"end") +); + +DECLARE_EVENT_CLASS(wakeup_source, + + TP_PROTO(const char *name, unsigned int state), + + TP_ARGS(name, state), + + TP_STRUCT__entry( + __string( name, name ) + __field( u64, state ) + ), + + TP_fast_assign( + __assign_str(name); + __entry->state = state; + ), + + TP_printk("%s state=0x%lx", __get_str(name), + (unsigned long)__entry->state) +); + +DEFINE_EVENT(wakeup_source, wakeup_source_activate, + + TP_PROTO(const char *name, unsigned int state), + + TP_ARGS(name, state) +); + +DEFINE_EVENT(wakeup_source, wakeup_source_deactivate, + + TP_PROTO(const char *name, unsigned int state), + + TP_ARGS(name, state) +); + +#ifdef CONFIG_ARCH_OMAP2PLUS +/* + * The power domain events are used for power domains transitions + */ +DECLARE_EVENT_CLASS(power_domain, + + TP_PROTO(const char *name, unsigned int state, unsigned int cpu_id), + + TP_ARGS(name, state, cpu_id), + + TP_STRUCT__entry( + __string( name, name ) + __field( u64, state ) + __field( u64, cpu_id ) + ), + + TP_fast_assign( + __assign_str(name); + __entry->state = state; + __entry->cpu_id = cpu_id; +), + + TP_printk("%s state=%lu cpu_id=%lu", __get_str(name), + (unsigned long)__entry->state, (unsigned long)__entry->cpu_id) +); + +DEFINE_EVENT(power_domain, power_domain_target, + + TP_PROTO(const char *name, unsigned int state, unsigned int cpu_id), + + TP_ARGS(name, state, cpu_id) +); +#endif + +/* + * CPU latency QoS events used for global CPU latency QoS list updates + */ +DECLARE_EVENT_CLASS(cpu_latency_qos_request, + + TP_PROTO(s32 value), + + TP_ARGS(value), + + TP_STRUCT__entry( + __field( s32, value ) + ), + + TP_fast_assign( + __entry->value = value; + ), + + TP_printk("CPU_DMA_LATENCY value=%d", + __entry->value) +); + +DEFINE_EVENT(cpu_latency_qos_request, pm_qos_add_request, + + TP_PROTO(s32 value), + + TP_ARGS(value) +); + +DEFINE_EVENT(cpu_latency_qos_request, pm_qos_update_request, + + TP_PROTO(s32 value), + + TP_ARGS(value) +); + +DEFINE_EVENT(cpu_latency_qos_request, pm_qos_remove_request, + + TP_PROTO(s32 value), + + TP_ARGS(value) +); + +/* + * General PM QoS events used for updates of PM QoS request lists + */ +DECLARE_EVENT_CLASS(pm_qos_update, + + TP_PROTO(enum pm_qos_req_action action, int prev_value, int curr_value), + + TP_ARGS(action, prev_value, curr_value), + + TP_STRUCT__entry( + __field( enum pm_qos_req_action, action ) + __field( int, prev_value ) + __field( int, curr_value ) + ), + + TP_fast_assign( + __entry->action = action; + __entry->prev_value = prev_value; + __entry->curr_value = curr_value; + ), + + TP_printk("action=%s prev_value=%d curr_value=%d", + __print_symbolic(__entry->action, + { PM_QOS_ADD_REQ, "ADD_REQ" }, + { PM_QOS_UPDATE_REQ, "UPDATE_REQ" }, + { PM_QOS_REMOVE_REQ, "REMOVE_REQ" }), + __entry->prev_value, __entry->curr_value) +); + +DEFINE_EVENT(pm_qos_update, pm_qos_update_target, + + TP_PROTO(enum pm_qos_req_action action, int prev_value, int curr_value), + + TP_ARGS(action, prev_value, curr_value) +); + +DEFINE_EVENT_PRINT(pm_qos_update, pm_qos_update_flags, + + TP_PROTO(enum pm_qos_req_action action, int prev_value, int curr_value), + + TP_ARGS(action, prev_value, curr_value), + + TP_printk("action=%s prev_value=0x%x curr_value=0x%x", + __print_symbolic(__entry->action, + { PM_QOS_ADD_REQ, "ADD_REQ" }, + { PM_QOS_UPDATE_REQ, "UPDATE_REQ" }, + { PM_QOS_REMOVE_REQ, "REMOVE_REQ" }), + __entry->prev_value, __entry->curr_value) +); + +DECLARE_EVENT_CLASS(dev_pm_qos_request, + + TP_PROTO(const char *name, enum dev_pm_qos_req_type type, + s32 new_value), + + TP_ARGS(name, type, new_value), + + TP_STRUCT__entry( + __string( name, name ) + __field( enum dev_pm_qos_req_type, type ) + __field( s32, new_value ) + ), + + TP_fast_assign( + __assign_str(name); + __entry->type = type; + __entry->new_value = new_value; + ), + + TP_printk("device=%s type=%s new_value=%d", + __get_str(name), + __print_symbolic(__entry->type, + { DEV_PM_QOS_RESUME_LATENCY, "DEV_PM_QOS_RESUME_LATENCY" }, + { DEV_PM_QOS_FLAGS, "DEV_PM_QOS_FLAGS" }), + __entry->new_value) +); + +DEFINE_EVENT(dev_pm_qos_request, dev_pm_qos_add_request, + + TP_PROTO(const char *name, enum dev_pm_qos_req_type type, + s32 new_value), + + TP_ARGS(name, type, new_value) +); + +DEFINE_EVENT(dev_pm_qos_request, dev_pm_qos_update_request, + + TP_PROTO(const char *name, enum dev_pm_qos_req_type type, + s32 new_value), + + TP_ARGS(name, type, new_value) +); + +DEFINE_EVENT(dev_pm_qos_request, dev_pm_qos_remove_request, + + TP_PROTO(const char *name, enum dev_pm_qos_req_type type, + s32 new_value), + + TP_ARGS(name, type, new_value) +); + +TRACE_EVENT(guest_halt_poll_ns, + + TP_PROTO(bool grow, unsigned int new, unsigned int old), + + TP_ARGS(grow, new, old), + + TP_STRUCT__entry( + __field(bool, grow) + __field(unsigned int, new) + __field(unsigned int, old) + ), + + TP_fast_assign( + __entry->grow = grow; + __entry->new = new; + __entry->old = old; + ), + + TP_printk("halt_poll_ns %u (%s %u)", + __entry->new, + __entry->grow ? "grow" : "shrink", + __entry->old) +); + +#define trace_guest_halt_poll_ns_grow(new, old) \ + trace_guest_halt_poll_ns(true, new, old) +#define trace_guest_halt_poll_ns_shrink(new, old) \ + trace_guest_halt_poll_ns(false, new, old) +#endif /* _TRACE_POWER_H */ + +/* This part must be outside protection */ +#include -- cgit v1.3.1