Commit 36d09b96 authored by Yulong Han's avatar Yulong Han Committed by Huacai Chen
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LoongArch: KVM: Add tracepoints for CPUCFG and CSR emulation exits 



This patch adds tracepoints to track KVM exits caused by CPUCFG and
CSR emulation. Note that IOCSR emulation tracing is already covered
by the generic trace_kvm_iocsr().

Reviewed-by: default avatarBibo Mao <maobibo@loongson.cn>
Signed-off-by: default avatarYulong Han <wheatfox17@icloud.com>
Signed-off-by: default avatarHuacai Chen <chenhuacai@loongson.cn>
parent 46ecfb68

arch/loongarch/kvm/exit.c

+2 −0
Original line number Diff line number Diff line
@@ -289,9 +289,11 @@ static int kvm_trap_handle_gspr(struct kvm_vcpu *vcpu) 
	er = EMULATE_FAIL;

	switch (((inst.word >> 24) & 0xff)) {

	case 0x0: /* CPUCFG GSPR */

		trace_kvm_exit_cpucfg(vcpu, KVM_TRACE_EXIT_CPUCFG);

		er = kvm_emu_cpucfg(vcpu, inst);

		break;

	case 0x4: /* CSR{RD,WR,XCHG} GSPR */

		trace_kvm_exit_csr(vcpu, KVM_TRACE_EXIT_CSR);

		er = kvm_handle_csr(vcpu, inst);

		break;

	case 0x6: /* Cache, Idle and IOCSR GSPR */

arch/loongarch/kvm/trace.h

+13 −1
Original line number Diff line number Diff line
@@ -46,11 +46,15 @@ DEFINE_EVENT(kvm_transition, kvm_out, 
/* Further exit reasons */

#define KVM_TRACE_EXIT_IDLE		64

#define KVM_TRACE_EXIT_CACHE		65

#define KVM_TRACE_EXIT_CPUCFG		66

#define KVM_TRACE_EXIT_CSR		67



/* Tracepoints for VM exits */

#define kvm_trace_symbol_exit_types			\

	{ KVM_TRACE_EXIT_IDLE,		"IDLE" },	\

	{ KVM_TRACE_EXIT_CACHE,		"CACHE" }

	{ KVM_TRACE_EXIT_CACHE,		"CACHE" },	\

	{ KVM_TRACE_EXIT_CPUCFG,	"CPUCFG" },	\

	{ KVM_TRACE_EXIT_CSR,		"CSR" }



DECLARE_EVENT_CLASS(kvm_exit,

	    TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),
@@ -82,6 +86,14 @@ DEFINE_EVENT(kvm_exit, kvm_exit_cache, 
	     TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),

	     TP_ARGS(vcpu, reason));



DEFINE_EVENT(kvm_exit, kvm_exit_cpucfg,

	     TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),

	     TP_ARGS(vcpu, reason));



DEFINE_EVENT(kvm_exit, kvm_exit_csr,

	     TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),

	     TP_ARGS(vcpu, reason));



DEFINE_EVENT(kvm_exit, kvm_exit,

	     TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason),

	     TP_ARGS(vcpu, reason));