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Diffstat (limited to 'virt/kvm/arm/vgic/vgic-irqfd.c')
-rw-r--r--virt/kvm/arm/vgic/vgic-irqfd.c116
1 files changed, 98 insertions, 18 deletions
diff --git a/virt/kvm/arm/vgic/vgic-irqfd.c b/virt/kvm/arm/vgic/vgic-irqfd.c
index c675513270bb..b31a51a14efb 100644
--- a/virt/kvm/arm/vgic/vgic-irqfd.c
+++ b/virt/kvm/arm/vgic/vgic-irqfd.c
@@ -17,36 +17,116 @@
#include <linux/kvm.h>
#include <linux/kvm_host.h>
#include <trace/events/kvm.h>
+#include <kvm/arm_vgic.h>
+#include "vgic.h"
-int kvm_irq_map_gsi(struct kvm *kvm,
- struct kvm_kernel_irq_routing_entry *entries,
- int gsi)
+/**
+ * vgic_irqfd_set_irq: inject the IRQ corresponding to the
+ * irqchip routing entry
+ *
+ * This is the entry point for irqfd IRQ injection
+ */
+static int vgic_irqfd_set_irq(struct kvm_kernel_irq_routing_entry *e,
+ struct kvm *kvm, int irq_source_id,
+ int level, bool line_status)
{
- return 0;
+ unsigned int spi_id = e->irqchip.pin + VGIC_NR_PRIVATE_IRQS;
+
+ if (!vgic_valid_spi(kvm, spi_id))
+ return -EINVAL;
+ return kvm_vgic_inject_irq(kvm, 0, spi_id, level);
}
-int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned int irqchip,
- unsigned int pin)
+/**
+ * kvm_set_routing_entry: populate a kvm routing entry
+ * from a user routing entry
+ *
+ * @kvm: the VM this entry is applied to
+ * @e: kvm kernel routing entry handle
+ * @ue: user api routing entry handle
+ * return 0 on success, -EINVAL on errors.
+ */
+#ifdef KVM_CAP_X2APIC_API
+int kvm_set_routing_entry(struct kvm *kvm,
+ struct kvm_kernel_irq_routing_entry *e,
+ const struct kvm_irq_routing_entry *ue)
+#else
+/* Remove this version and the ifdefery once merged into 4.8 */
+int kvm_set_routing_entry(struct kvm_kernel_irq_routing_entry *e,
+ const struct kvm_irq_routing_entry *ue)
+#endif
{
- return pin;
+ int r = -EINVAL;
+
+ switch (ue->type) {
+ case KVM_IRQ_ROUTING_IRQCHIP:
+ e->set = vgic_irqfd_set_irq;
+ e->irqchip.irqchip = ue->u.irqchip.irqchip;
+ e->irqchip.pin = ue->u.irqchip.pin;
+ if ((e->irqchip.pin >= KVM_IRQCHIP_NUM_PINS) ||
+ (e->irqchip.irqchip >= KVM_NR_IRQCHIPS))
+ goto out;
+ break;
+ case KVM_IRQ_ROUTING_MSI:
+ e->set = kvm_set_msi;
+ e->msi.address_lo = ue->u.msi.address_lo;
+ e->msi.address_hi = ue->u.msi.address_hi;
+ e->msi.data = ue->u.msi.data;
+ e->msi.flags = ue->flags;
+ e->msi.devid = ue->u.msi.devid;
+ break;
+ default:
+ goto out;
+ }
+ r = 0;
+out:
+ return r;
}
-int kvm_set_irq(struct kvm *kvm, int irq_source_id,
- u32 irq, int level, bool line_status)
+/**
+ * kvm_set_msi: inject the MSI corresponding to the
+ * MSI routing entry
+ *
+ * This is the entry point for irqfd MSI injection
+ * and userspace MSI injection.
+ */
+int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
+ struct kvm *kvm, int irq_source_id,
+ int level, bool line_status)
{
- unsigned int spi = irq + VGIC_NR_PRIVATE_IRQS;
+ struct kvm_msi msi;
- trace_kvm_set_irq(irq, level, irq_source_id);
+ msi.address_lo = e->msi.address_lo;
+ msi.address_hi = e->msi.address_hi;
+ msi.data = e->msi.data;
+ msi.flags = e->msi.flags;
+ msi.devid = e->msi.devid;
- BUG_ON(!vgic_initialized(kvm));
+ if (!vgic_has_its(kvm))
+ return -ENODEV;
- return kvm_vgic_inject_irq(kvm, 0, spi, level);
+ return vgic_its_inject_msi(kvm, &msi);
}
-/* MSI not implemented yet */
-int kvm_set_msi(struct kvm_kernel_irq_routing_entry *e,
- struct kvm *kvm, int irq_source_id,
- int level, bool line_status)
+int kvm_vgic_setup_default_irq_routing(struct kvm *kvm)
{
- return 0;
+ struct kvm_irq_routing_entry *entries;
+ struct vgic_dist *dist = &kvm->arch.vgic;
+ u32 nr = dist->nr_spis;
+ int i, ret;
+
+ entries = kcalloc(nr, sizeof(struct kvm_kernel_irq_routing_entry),
+ GFP_KERNEL);
+ if (!entries)
+ return -ENOMEM;
+
+ for (i = 0; i < nr; i++) {
+ entries[i].gsi = i;
+ entries[i].type = KVM_IRQ_ROUTING_IRQCHIP;
+ entries[i].u.irqchip.irqchip = 0;
+ entries[i].u.irqchip.pin = i;
+ }
+ ret = kvm_set_irq_routing(kvm, entries, nr, 0);
+ kfree(entries);
+ return ret;
}