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Diffstat (limited to 'virt/kvm/arm/vgic/vgic-mmio.c')
-rw-r--r--virt/kvm/arm/vgic/vgic-mmio.c54
1 files changed, 54 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-mmio.c b/virt/kvm/arm/vgic/vgic-mmio.c
index 1d1886e7d640..3654b4c835ef 100644
--- a/virt/kvm/arm/vgic/vgic-mmio.c
+++ b/virt/kvm/arm/vgic/vgic-mmio.c
@@ -362,6 +362,60 @@ void vgic_mmio_write_config(struct kvm_vcpu *vcpu,
}
}
+u64 vgic_read_irq_line_level_info(struct kvm_vcpu *vcpu, u32 intid)
+{
+ int i;
+ u64 val = 0;
+ int nr_irqs = vcpu->kvm->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS;
+
+ for (i = 0; i < 32; i++) {
+ struct vgic_irq *irq;
+
+ if ((intid + i) < VGIC_NR_SGIS || (intid + i) >= nr_irqs)
+ continue;
+
+ irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i);
+ if (irq->config == VGIC_CONFIG_LEVEL && irq->line_level)
+ val |= (1U << i);
+
+ vgic_put_irq(vcpu->kvm, irq);
+ }
+
+ return val;
+}
+
+void vgic_write_irq_line_level_info(struct kvm_vcpu *vcpu, u32 intid,
+ const u64 val)
+{
+ int i;
+ int nr_irqs = vcpu->kvm->arch.vgic.nr_spis + VGIC_NR_PRIVATE_IRQS;
+
+ for (i = 0; i < 32; i++) {
+ struct vgic_irq *irq;
+ bool new_level;
+
+ if ((intid + i) < VGIC_NR_SGIS || (intid + i) >= nr_irqs)
+ continue;
+
+ irq = vgic_get_irq(vcpu->kvm, vcpu, intid + i);
+
+ /*
+ * Line level is set irrespective of irq type
+ * (level or edge) to avoid dependency that VM should
+ * restore irq config before line level.
+ */
+ new_level = !!(val & (1U << i));
+ spin_lock(&irq->irq_lock);
+ irq->line_level = new_level;
+ if (new_level)
+ vgic_queue_irq_unlock(vcpu->kvm, irq);
+ else
+ spin_unlock(&irq->irq_lock);
+
+ vgic_put_irq(vcpu->kvm, irq);
+ }
+}
+
static int match_region(const void *key, const void *elt)
{
const unsigned int offset = (unsigned long)key;