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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 18 May 2022 16:27:18.0836 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 86d044b8-ebb0-455d-c305-08da38eb46ba X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT019.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MWHPR12MB1599 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a tracepoint to track number of doorbells being sent to signal a running vCPU to process IRQ after being injected. Reviewed-by: Maxim Levitsky Signed-off-by: Suravee Suthikulpanit --- arch/x86/kvm/svm/avic.c | 4 +++- arch/x86/kvm/trace.h | 18 ++++++++++++++++++ arch/x86/kvm/x86.c | 1 + 3 files changed, 22 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm/avic.c b/arch/x86/kvm/svm/avic.c index 9c439a32c343..2a9eb419bdb9 100644 --- a/arch/x86/kvm/svm/avic.c +++ b/arch/x86/kvm/svm/avic.c @@ -324,8 +324,10 @@ void avic_ring_doorbell(struct kvm_vcpu *vcpu) */ int cpu = READ_ONCE(vcpu->cpu); - if (cpu != get_cpu()) + if (cpu != get_cpu()) { wrmsrl(MSR_AMD64_SVM_AVIC_DOORBELL, kvm_cpu_get_apicid(cpu)); + trace_kvm_avic_doorbell(vcpu->vcpu_id, kvm_cpu_get_apicid(cpu)); + } put_cpu(); } diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h index de4762517569..a47bb0fdea70 100644 --- a/arch/x86/kvm/trace.h +++ b/arch/x86/kvm/trace.h @@ -1479,6 +1479,24 @@ TRACE_EVENT(kvm_avic_kick_vcpu_slowpath, __entry->icrh, __entry->icrl, __entry->index) ); +TRACE_EVENT(kvm_avic_doorbell, + TP_PROTO(u32 vcpuid, u32 apicid), + TP_ARGS(vcpuid, apicid), + + TP_STRUCT__entry( + __field(u32, vcpuid) + __field(u32, apicid) + ), + + TP_fast_assign( + __entry->vcpuid = vcpuid; + __entry->apicid = apicid; + ), + + TP_printk("vcpuid=%u, apicid=%u", + __entry->vcpuid, __entry->apicid) +); + 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), diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 0febaca80feb..d013f6fc2e33 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -13095,6 +13095,7 @@ 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_avic_kick_vcpu_slowpath); +EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_doorbell); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_apicv_accept_irq); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_enter); EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_exit); -- 2.25.1