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696dfec22b
The hyp_enter and hyp_exit events are logged by the hypervisor any time it is entered and exited. Signed-off-by: Vincent Donnefort <vdonnefort@google.com> Link: https://patch.msgid.link/20260309162516.2623589-29-vdonnefort@google.com Signed-off-by: Marc Zyngier <maz@kernel.org>
71 lines
2.4 KiB
C
71 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef __ARM64_KVM_HYP_NVHE_TRACE_H
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#define __ARM64_KVM_HYP_NVHE_TRACE_H
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#include <linux/trace_remote_event.h>
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#include <asm/kvm_hyptrace.h>
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static inline pid_t __tracing_get_vcpu_pid(struct kvm_cpu_context *host_ctxt)
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{
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struct kvm_vcpu *vcpu;
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if (!host_ctxt)
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host_ctxt = host_data_ptr(host_ctxt);
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vcpu = host_ctxt->__hyp_running_vcpu;
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return vcpu ? vcpu->arch.pid : 0;
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}
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#define HE_PROTO(__args...) __args
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#define HE_ASSIGN(__args...) __args
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#define HE_STRUCT RE_STRUCT
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#define he_field re_field
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#ifdef CONFIG_NVHE_EL2_TRACING
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#define HYP_EVENT(__name, __proto, __struct, __assign, __printk) \
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REMOTE_EVENT_FORMAT(__name, __struct); \
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extern struct hyp_event_id hyp_event_id_##__name; \
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static __always_inline void trace_##__name(__proto) \
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{ \
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struct remote_event_format_##__name *__entry; \
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size_t length = sizeof(*__entry); \
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\
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if (!atomic_read(&hyp_event_id_##__name.enabled)) \
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return; \
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__entry = tracing_reserve_entry(length); \
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if (!__entry) \
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return; \
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__entry->hdr.id = hyp_event_id_##__name.id; \
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__assign \
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tracing_commit_entry(); \
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}
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void *tracing_reserve_entry(unsigned long length);
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void tracing_commit_entry(void);
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int __tracing_load(unsigned long desc_va, size_t desc_size);
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void __tracing_unload(void);
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int __tracing_enable(bool enable);
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int __tracing_swap_reader(unsigned int cpu);
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void __tracing_update_clock(u32 mult, u32 shift, u64 epoch_ns, u64 epoch_cyc);
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int __tracing_reset(unsigned int cpu);
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int __tracing_enable_event(unsigned short id, bool enable);
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#else
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static inline void *tracing_reserve_entry(unsigned long length) { return NULL; }
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static inline void tracing_commit_entry(void) { }
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#define HYP_EVENT(__name, __proto, __struct, __assign, __printk) \
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static inline void trace_##__name(__proto) {}
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static inline int __tracing_load(unsigned long desc_va, size_t desc_size) { return -ENODEV; }
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static inline void __tracing_unload(void) { }
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static inline int __tracing_enable(bool enable) { return -ENODEV; }
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static inline int __tracing_swap_reader(unsigned int cpu) { return -ENODEV; }
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static inline void __tracing_update_clock(u32 mult, u32 shift, u64 epoch_ns, u64 epoch_cyc) { }
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static inline int __tracing_reset(unsigned int cpu) { return -ENODEV; }
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static inline int __tracing_enable_event(unsigned short id, bool enable) { return -ENODEV; }
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#endif
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#endif
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