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 <yoan.picchi@xxxxxxx>
---
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
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