[PATCH 7/7] KVM: arm64: Add irq_inject counter for kvm_stat
From: Yoan Picchi <hidden>
Date: 2021-03-19 16:20:21
Also in:
kvmarm
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
Add a counter for interrupt injections. That is when kvm relay an interrupt to the guest (for instance a timer, or a device interrupt like from a network card) Signed-off-by: Yoan Picchi <redacted> --- arch/arm64/include/asm/kvm_host.h | 2 ++ arch/arm64/kvm/arm.c | 2 ++ arch/arm64/kvm/guest.c | 2 ++ arch/arm64/kvm/vgic/vgic.c | 2 ++ 4 files changed, 8 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index fa59b669c..253acb8c2 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h@@ -551,6 +551,7 @@ struct kvm_vm_stat { ulong memory_slot_unmaped; ulong stage2_unmap_vm; ulong cached_page_invalidated; + ulong irq_inject; }; struct kvm_vcpu_stat {
@@ -567,6 +568,7 @@ struct kvm_vcpu_stat { u64 mmio_exit_kernel; u64 regular_page_mapped; u64 huge_page_mapped; + u64 irq_inject; u64 exits; };
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index fc4c95dd2..841551f14 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c@@ -895,6 +895,8 @@ static int vcpu_interrupt_line(struct kvm_vcpu *vcpu, int number, bool level) bool set; unsigned long *hcr; + vcpu->stat.irq_inject++; + if (number == KVM_ARM_IRQ_CPU_IRQ) bit_index = __ffs(HCR_VI); else /* KVM_ARM_IRQ_CPU_FIQ */
diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c
index 129c0d53d..f663b03ae 100644
--- a/arch/arm64/kvm/guest.c
+++ b/arch/arm64/kvm/guest.c@@ -45,6 +45,8 @@ struct kvm_stats_debugfs_item debugfs_entries[] = { VM_STAT("memory_slot_unmaped", memory_slot_unmaped), VM_STAT("stage2_unmap_vm", stage2_unmap_vm), VM_STAT("cached_page_invalidated", cached_page_invalidated), + VM_STAT("irq_inject", irq_inject), + VCPU_STAT("irq_inject", irq_inject), VCPU_STAT("exits", exits), VCPU_STAT("halt_poll_success_ns", halt_poll_success_ns), VCPU_STAT("halt_poll_fail_ns", halt_poll_fail_ns),
diff --git a/arch/arm64/kvm/vgic/vgic.c b/arch/arm64/kvm/vgic/vgic.c
index 1c597c988..9e504243b 100644
--- a/arch/arm64/kvm/vgic/vgic.c
+++ b/arch/arm64/kvm/vgic/vgic.c@@ -458,6 +458,8 @@ int kvm_vgic_inject_irq(struct kvm *kvm, int cpuid, unsigned int intid, raw_spin_lock_irqsave(&irq->irq_lock, flags); + kvm->stat.irq_inject++; + if (!vgic_validate_injection(irq, level, owner)) { /* Nothing to see here, move along... */ raw_spin_unlock_irqrestore(&irq->irq_lock, flags);
--
2.17.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel