KVM: arm/arm64: vgic-new: Wire up irqfd injection

Connect to the new VGIC to the irqfd framework, so that we can
inject IRQs.
GSI routing and MSI routing is not yet implemented.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>

diff --git a/virt/kvm/arm/vgic/vgic-irqfd.c b/virt/kvm/arm/vgic/vgic-irqfd.c
new file mode 100644 (file)
index 0000000..c675513
--- /dev/null
+++ b/virt/kvm/arm/vgic/vgic-irqfd.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2015, 2016 ARM Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/kvm.h>
+#include <linux/kvm_host.h>
+#include <trace/events/kvm.h>
+
+int kvm_irq_map_gsi(struct kvm *kvm,
+                   struct kvm_kernel_irq_routing_entry *entries,
+                   int gsi)
+{
+       return 0;
+}
+
+int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned int irqchip,
+                        unsigned int pin)
+{
+       return pin;
+}
+
+int kvm_set_irq(struct kvm *kvm, int irq_source_id,
+               u32 irq, int level, bool line_status)
+{
+       unsigned int spi = irq + VGIC_NR_PRIVATE_IRQS;
+
+       trace_kvm_set_irq(irq, level, irq_source_id);
+
+       BUG_ON(!vgic_initialized(kvm));
+
+       return kvm_vgic_inject_irq(kvm, 0, spi, level);
+}
+
+/* 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)
+{
+       return 0;
+}