From 0e77b324110c9c1e240a67cc35fa1355f8f3f57c Mon Sep 17 00:00:00 2001 From: Maxim Levitsky Date: Tue, 10 Sep 2024 16:03:49 -0400 Subject: [PATCH] KVM: x86: Add information about pending requests to kvm_exit tracepoint Print pending requests in the kvm_exit tracepoint, which allows userspace to gather information on how often KVM interrupts vCPUs due to specific requests. Signed-off-by: Maxim Levitsky Link: https://lore.kernel.org/r/20240910200350.264245-3-mlevitsk@redhat.com [sean: massage changelog] Signed-off-by: Sean Christopherson --- arch/x86/kvm/trace.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h index c2edf4a36fadd..0b844cb97978a 100644 --- a/arch/x86/kvm/trace.h +++ b/arch/x86/kvm/trace.h @@ -315,12 +315,14 @@ TRACE_EVENT(name, \ __field( u32, intr_info ) \ __field( u32, error_code ) \ __field( unsigned int, vcpu_id ) \ + __field( u64, requests ) \ ), \ \ TP_fast_assign( \ __entry->guest_rip = kvm_rip_read(vcpu); \ __entry->isa = isa; \ __entry->vcpu_id = vcpu->vcpu_id; \ + __entry->requests = READ_ONCE(vcpu->requests); \ kvm_x86_call(get_exit_info)(vcpu, \ &__entry->exit_reason, \ &__entry->info1, \ @@ -330,11 +332,13 @@ TRACE_EVENT(name, \ ), \ \ TP_printk("vcpu %u reason %s%s%s rip 0x%lx info1 0x%016llx " \ - "info2 0x%016llx intr_info 0x%08x error_code 0x%08x", \ + "info2 0x%016llx intr_info 0x%08x error_code 0x%08x " \ + "requests 0x%016llx", \ __entry->vcpu_id, \ kvm_print_exit_reason(__entry->exit_reason, __entry->isa), \ __entry->guest_rip, __entry->info1, __entry->info2, \ - __entry->intr_info, __entry->error_code) \ + __entry->intr_info, __entry->error_code, \ + __entry->requests) \ ) /* -- 2.39.5