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 <maobibo@loongson.cn>
Signed-off-by: Yulong Han <wheatfox17@icloud.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>

diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c
index a0ceb49a060f7636de827cea52c380c2fce955a2..2ce41f93b2a44462a71bf9cb1e3a836a41217c1f 100644 (file)
--- a/arch/loongarch/kvm/exit.c
+++ b/arch/loongarch/kvm/exit.c
@@ -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 */

diff --git a/arch/loongarch/kvm/trace.h b/arch/loongarch/kvm/trace.h
index 1783397b1bc88e852b5b424549e00acc1cce0ff8..145514dab6d5bb38107992412d9a3fdf7bc767b3 100644 (file)
--- 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));