From d523ab6ba2753bd41b4447ae48024182cb4da94f Mon Sep 17 00:00:00 2001 From: Tom Lendacky Date: Thu, 10 Dec 2020 11:09:48 -0600 Subject: [PATCH] KVM: SVM: Create trace events for VMGEXIT processing Add trace events for entry to and exit from VMGEXIT processing. The vCPU id and the exit reason will be common for the trace events. The exit info fields will represent the input and output values for the entry and exit events, respectively. Signed-off-by: Tom Lendacky Message-Id: <25357dca49a38372e8f483753fb0c1c2a70a6898.1607620209.git.thomas.lendacky@amd.com> Signed-off-by: Paolo Bonzini --- arch/x86/kvm/svm/sev.c | 6 ++++++ arch/x86/kvm/trace.h | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++ arch/x86/kvm/x86.c | 2 ++ 3 files changed, 61 insertions(+) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index db123562e7d5..089951cbe28e 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -15,10 +15,12 @@ #include #include #include +#include #include "x86.h" #include "svm.h" #include "cpuid.h" +#include "trace.h" static u8 sev_enc_bit; static int sev_flush_asids(void); @@ -1468,6 +1470,8 @@ static void pre_sev_es_run(struct vcpu_svm *svm) if (!svm->ghcb) return; + trace_kvm_vmgexit_exit(svm->vcpu.vcpu_id, svm->ghcb); + sev_es_sync_to_ghcb(svm); kvm_vcpu_unmap(&svm->vcpu, &svm->ghcb_map, true); @@ -1617,6 +1621,8 @@ int sev_handle_vmgexit(struct vcpu_svm *svm) svm->ghcb = svm->ghcb_map.hva; ghcb = svm->ghcb_map.hva; + trace_kvm_vmgexit_enter(svm->vcpu.vcpu_id, ghcb); + exit_code = ghcb_get_sw_exit_code(ghcb); ret = sev_es_validate_vmgexit(svm); diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h index aef960f90f26..7da931a511c9 100644 --- a/arch/x86/kvm/trace.h +++ b/arch/x86/kvm/trace.h @@ -1578,6 +1578,59 @@ TRACE_EVENT(kvm_hv_syndbg_get_msr, __entry->vcpu_id, __entry->vp_index, __entry->msr, __entry->data) ); + +/* + * Tracepoint for the start of VMGEXIT processing + */ +TRACE_EVENT(kvm_vmgexit_enter, + TP_PROTO(unsigned int vcpu_id, struct ghcb *ghcb), + TP_ARGS(vcpu_id, ghcb), + + TP_STRUCT__entry( + __field(unsigned int, vcpu_id) + __field(u64, exit_reason) + __field(u64, info1) + __field(u64, info2) + ), + + TP_fast_assign( + __entry->vcpu_id = vcpu_id; + __entry->exit_reason = ghcb->save.sw_exit_code; + __entry->info1 = ghcb->save.sw_exit_info_1; + __entry->info2 = ghcb->save.sw_exit_info_2; + ), + + TP_printk("vcpu %u, exit_reason %llx, exit_info1 %llx, exit_info2 %llx", + __entry->vcpu_id, __entry->exit_reason, + __entry->info1, __entry->info2) +); + +/* + * Tracepoint for the end of VMGEXIT processing + */ +TRACE_EVENT(kvm_vmgexit_exit, + TP_PROTO(unsigned int vcpu_id, struct ghcb *ghcb), + TP_ARGS(vcpu_id, ghcb), + + TP_STRUCT__entry( + __field(unsigned int, vcpu_id) + __field(u64, exit_reason) + __field(u64, info1) + __field(u64, info2) + ), + + TP_fast_assign( + __entry->vcpu_id = vcpu_id; + __entry->exit_reason = ghcb->save.sw_exit_code; + __entry->info1 = ghcb->save.sw_exit_info_1; + __entry->info2 = ghcb->save.sw_exit_info_2; + ), + + TP_printk("vcpu %u, exit_reason %llx, exit_info1 %llx, exit_info2 %llx", + __entry->vcpu_id, __entry->exit_reason, + __entry->info1, __entry->info2) +); + #endif /* _TRACE_KVM_H */ #undef TRACE_INCLUDE_PATH diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index d88e334b19e7..10704bd8c38a 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -11314,3 +11314,5 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_ga_log); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_apicv_update_request); +EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_enter); +EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_exit); -- 2.11.0