AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-17 12:26:45 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

kvm: svm: Introduce GA Log tracepoint for AVIC

Browse Source 
GA Log tracepoint is useful when debugging AVIC performance
issue as it can be used with perf to count the number of times
IOMMU AVIC injects interrupts through the slow-path instead of
directly inject interrupts to the target vcpu.

Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Suravee Suthikulpanit 2020-03-12 05:39:28 -05:00 committed by Paolo Bonzini
parent 3ac40c404c
commit ab56f8e62d
3 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/x86/kvm/svm.c
View File

@ -1232,6 +1232,7 @@ static int avic_ga_log_notifier(u32 ga_tag)
u32 vcpu_id = AVIC_GATAG_TO_VCPUID(ga_tag);
pr_debug("SVM: %s: vm_id=%#x, vcpu_id=%#x\n", __func__, vm_id, vcpu_id);
trace_kvm_avic_ga_log(vm_id, vcpu_id);
spin_lock_irqsave(&svm_vm_data_hash_lock, flags);
hash_for_each_possible(svm_vm_data_hash, kvm_svm, hnode, vm_id) {

18
arch/x86/kvm/trace.h
View File

@ -1367,6 +1367,24 @@ TRACE_EVENT(kvm_avic_unaccelerated_access,
__entry->vec)
);
TRACE_EVENT(kvm_avic_ga_log,
TP_PROTO(u32 vmid, u32 vcpuid),
TP_ARGS(vmid, vcpuid),
TP_STRUCT__entry(
__field(u32, vmid)
__field(u32, vcpuid)
),
TP_fast_assign(
__entry->vmid = vmid;
__entry->vcpuid = vcpuid;
),
TP_printk("vmid=%u, vcpuid=%u",
__entry->vmid, __entry->vcpuid)
);
TRACE_EVENT(kvm_hv_timer_state,
TP_PROTO(unsigned int vcpu_id, unsigned int hv_timer_in_use),
TP_ARGS(vcpu_id, hv_timer_in_use),

1
arch/x86/kvm/x86.c
View File

@ -10562,4 +10562,5 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pml_full);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update);
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);