[PATCH 38/60] kvm: Make KVM_SIGNAL_MSI per plane

[Jörg Rödel]

From: Paolo Bonzini <pbonzini@xxxxxxxxxx>

Allow the KVM_SIGNAL_MSI ioctl for every plane instead of per VM.

Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Co-developed-by: Joerg Roedel <joerg.roedel@xxxxxxx>
Signed-off-by: Joerg Roedel <joerg.roedel@xxxxxxx>
---
 include/linux/kvm_host.h |  2 +-
 virt/kvm/irqchip.c       |  4 ++--
 virt/kvm/kvm_main.c      | 25 ++++++++++++++-----------
 3 files changed, 17 insertions(+), 14 deletions(-)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index cfb6911d6771..05a10836d92d 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -2370,7 +2370,7 @@ static inline int kvm_init_irq_routing(struct kvm *kvm)
 
 #endif
 
-int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi);
+int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi, unsigned plane_level);
 
 void kvm_eventfd_init(struct kvm *kvm);
 int kvm_ioeventfd(struct kvm *kvm, struct kvm_ioeventfd *args);
diff --git a/virt/kvm/irqchip.c b/virt/kvm/irqchip.c
index 14480d1df4f9..a4fea7d8dde6 100644
--- a/virt/kvm/irqchip.c
+++ b/virt/kvm/irqchip.c
@@ -45,7 +45,7 @@ int kvm_irq_map_chip_pin(struct kvm *kvm, unsigned irqchip, unsigned pin)
 	return irq_rt->chip[irqchip][pin];
 }
 
-int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi)
+int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi, unsigned plane_level)
 {
 	struct kvm_kernel_irq_routing_entry route;
 
@@ -57,7 +57,7 @@ int kvm_send_userspace_msi(struct kvm *kvm, struct kvm_msi *msi)
 	route.msi.data = msi->data;
 	route.msi.flags = msi->flags;
 	route.msi.devid = msi->devid;
-	route.msi.plane_level = 0;
+	route.msi.plane_level = plane_level;
 
 	return kvm_set_msi(&route, kvm, KVM_USERSPACE_IRQ_SOURCE_ID, 1, false);
 }
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index a30123b77112..dc59f2f9d405 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -4907,6 +4907,17 @@ static long __kvm_plane_ioctl(struct kvm_plane *plane, unsigned int ioctl, unsig
 	case KVM_CREATE_VCPU:
 		r = kvm_plane_ioctl_create_vcpu(plane, arg);
 		break;
+#ifdef CONFIG_HAVE_KVM_MSI
+	case KVM_SIGNAL_MSI: {
+		void __user *argp = (void __user *)arg;
+		struct kvm_msi msi;
+
+		if (copy_from_user(&msi, argp, sizeof(msi)))
+			return -EFAULT;
+		r = kvm_send_userspace_msi(plane->kvm, &msi, plane->level);
+		break;
+	}
+#endif
 	default:
 		r = -ENOTTY;
 	}
@@ -5493,6 +5504,9 @@ static long kvm_vm_ioctl(struct file *filp,
 		r = kvm_vm_ioctl_create_plane(kvm, arg);
 		break;
 	case KVM_CREATE_VCPU:
+#ifdef CONFIG_HAVE_KVM_MSI
+	case KVM_SIGNAL_MSI:
+#endif
 		r = __kvm_plane_ioctl(kvm->planes[0], ioctl, arg);
 		break;
 	case KVM_ENABLE_CAP: {
@@ -5597,17 +5611,6 @@ static long kvm_vm_ioctl(struct file *filp,
 		r = kvm_ioeventfd(kvm, &data);
 		break;
 	}
-#ifdef CONFIG_HAVE_KVM_MSI
-	case KVM_SIGNAL_MSI: {
-		struct kvm_msi msi;
-
-		r = -EFAULT;
-		if (copy_from_user(&msi, argp, sizeof(msi)))
-			goto out;
-		r = kvm_send_userspace_msi(kvm, &msi);
-		break;
-	}
-#endif
 #ifdef __KVM_HAVE_IRQ_LINE
 	case KVM_IRQ_LINE_STATUS:
 	case KVM_IRQ_LINE: {
-- 
2.53.0