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0d97f88481
arm64 uses its own copy of exit handler (arm64/kvm/handle_exit.c). Currently this file doesn't hook up with any trace points. As a result users might not see certain events (e.g. HVC & WFI) while using ftrace with arm64 KVM. This patch fixes this issue by adding a new trace file and defining two trace events (one of which is shared by wfi and wfe) for arm64. The new trace points are then linked with related functions in handle_exit.c. Signed-off-by: Wei Huang <wei@redhat.com> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
#if !defined(_TRACE_ARM64_KVM_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_ARM64_KVM_H
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#include <linux/tracepoint.h>
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM kvm
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TRACE_EVENT(kvm_wfx_arm64,
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TP_PROTO(unsigned long vcpu_pc, bool is_wfe),
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TP_ARGS(vcpu_pc, is_wfe),
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TP_STRUCT__entry(
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__field(unsigned long, vcpu_pc)
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__field(bool, is_wfe)
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),
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TP_fast_assign(
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__entry->vcpu_pc = vcpu_pc;
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__entry->is_wfe = is_wfe;
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),
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TP_printk("guest executed wf%c at: 0x%08lx",
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__entry->is_wfe ? 'e' : 'i', __entry->vcpu_pc)
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);
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TRACE_EVENT(kvm_hvc_arm64,
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TP_PROTO(unsigned long vcpu_pc, unsigned long r0, unsigned long imm),
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TP_ARGS(vcpu_pc, r0, imm),
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TP_STRUCT__entry(
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__field(unsigned long, vcpu_pc)
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__field(unsigned long, r0)
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__field(unsigned long, imm)
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),
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TP_fast_assign(
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__entry->vcpu_pc = vcpu_pc;
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__entry->r0 = r0;
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__entry->imm = imm;
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),
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TP_printk("HVC at 0x%08lx (r0: 0x%08lx, imm: 0x%lx)",
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__entry->vcpu_pc, __entry->r0, __entry->imm)
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);
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#endif /* _TRACE_ARM64_KVM_H */
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH .
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE trace
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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