From 123a89a163682ba85b0f181a84492493694fb85b Mon Sep 17 00:00:00 2001 From: Yulong Han Date: Mon, 21 Jul 2025 09:26:35 +0800 Subject: [PATCH] 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: Bibo Mao Signed-off-by: Yulong Han Signed-off-by: Huacai Chen Signed-off-by: maoxiaochuan --- arch/loongarch/kvm/exit.c | 2 ++ arch/loongarch/kvm/trace.h | 14 +++++++++++++- 2 files changed, 15 insertions(+), 1 deletion(-) diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c index 94cf050f5..30becfe83 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -272,9 +272,11 @@ 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 */ diff --git a/arch/loongarch/kvm/trace.h b/arch/loongarch/kvm/trace.h index 1783397b1..145514dab 100644 --- a/arch/loongarch/kvm/trace.h +++ b/arch/loongarch/kvm/trace.h @@ -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));