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Commit d8cabddf authored by Joerg Roedel's avatar Joerg Roedel Committed by Avi Kivity
Browse files

KVM: SVM: Add tracepoint for nested #vmexit 



This patch adds a tracepoint for every #vmexit we get from a
nested guest.

Signed-off-by: default avatarJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 0ac406de

arch/x86/kvm/svm.c

+6 −0
Original line number Diff line number Diff line
@@ -2366,6 +2366,12 @@ static int handle_exit(struct kvm_vcpu *vcpu) 
	if (is_nested(svm)) {

		int vmexit;



		trace_kvm_nested_vmexit(svm->vmcb->save.rip, exit_code,

					svm->vmcb->control.exit_info_1,

					svm->vmcb->control.exit_info_2,

					svm->vmcb->control.exit_int_info,

					svm->vmcb->control.exit_int_info_err);



		nsvm_printk("nested handle_exit: 0x%x | 0x%lx | 0x%lx | 0x%lx\n",

			    exit_code, svm->vmcb->control.exit_info_1,

			    svm->vmcb->control.exit_info_2, svm->vmcb->save.rip);

arch/x86/kvm/trace.h

+36 −0
Original line number Diff line number Diff line
@@ -382,6 +382,42 @@ TRACE_EVENT(kvm_nested_vmrun, 
		__entry->npt ? "on" : "off")

);



/*

 * Tracepoint for #VMEXIT while nested

 */

TRACE_EVENT(kvm_nested_vmexit,

	    TP_PROTO(__u64 rip, __u32 exit_code,

		     __u64 exit_info1, __u64 exit_info2,

		     __u32 exit_int_info, __u32 exit_int_info_err),

	    TP_ARGS(rip, exit_code, exit_info1, exit_info2,

		    exit_int_info, exit_int_info_err),



	TP_STRUCT__entry(

		__field(	__u64,		rip			)

		__field(	__u32,		exit_code		)

		__field(	__u64,		exit_info1		)

		__field(	__u64,		exit_info2		)

		__field(	__u32,		exit_int_info		)

		__field(	__u32,		exit_int_info_err	)

	),



	TP_fast_assign(

		__entry->rip			= rip;

		__entry->exit_code		= exit_code;

		__entry->exit_info1		= exit_info1;

		__entry->exit_info2		= exit_info2;

		__entry->exit_int_info		= exit_int_info;

		__entry->exit_int_info_err	= exit_int_info_err;

	),

	TP_printk("rip: 0x%016llx reason: %s ext_inf1: 0x%016llx "

		  "ext_inf2: 0x%016llx ext_int: 0x%08x ext_int_err: 0x%08x\n",

		  __entry->rip,

		  ftrace_print_symbols_seq(p, __entry->exit_code,

					   kvm_x86_ops->exit_reasons_str),

		  __entry->exit_info1, __entry->exit_info2,

		  __entry->exit_int_info, __entry->exit_int_info_err)

);



#endif /* _TRACE_KVM_H */



/* This part must be outside protection */

arch/x86/kvm/x86.c

+1 −0
Original line number Diff line number Diff line
@@ -4985,3 +4985,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault); 
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_cr);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmrun);

EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_vmexit);