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authorEric Auger <eric.auger@linaro.org>2015-11-30 14:01:58 +0100
committerChristoffer Dall <christoffer.dall@linaro.org>2016-05-20 15:39:59 +0200
commitc86c772191d7e65f873e6908e9604b31168936cd (patch)
tree150422f0979bb7f9938ea19e2a41ae1f780b144e /virt
parent621ecd8d2123bc13e140b519e01a18200aeb614c (diff)
downloadlinux-c86c772191d7e65f873e6908e9604b31168936cd.tar.gz
linux-c86c772191d7e65f873e6908e9604b31168936cd.tar.xz
KVM: arm/arm64: vgic-new: vgic_kvm_device: KVM device ops registration
This patch introduces the skeleton for the KVM device operations associated to KVM_DEV_TYPE_ARM_VGIC_V2 and KVM_DEV_TYPE_ARM_VGIC_V3. At that stage kvm_vgic_create is stubbed. Signed-off-by: Eric Auger <eric.auger@linaro.org> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Diffstat (limited to 'virt')
-rw-r--r--virt/kvm/arm/vgic/vgic-kvm-device.c108
-rw-r--r--virt/kvm/arm/vgic/vgic.h2
2 files changed, 110 insertions, 0 deletions
diff --git a/virt/kvm/arm/vgic/vgic-kvm-device.c b/virt/kvm/arm/vgic/vgic-kvm-device.c
new file mode 100644
index 0000000..ff332f3
--- /dev/null
+++ b/virt/kvm/arm/vgic/vgic-kvm-device.c
@@ -0,0 +1,108 @@
+/*
+ * VGIC: KVM DEVICE API
+ *
+ * Copyright (C) 2015 ARM Ltd.
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ *
+ * 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.
+ */
+#include <linux/kvm_host.h>
+#include <kvm/arm_vgic.h>
+
+/* common helpers */
+
+static int vgic_create(struct kvm_device *dev, u32 type)
+{
+ return kvm_vgic_create(dev->kvm, type);
+}
+
+static void vgic_destroy(struct kvm_device *dev)
+{
+ kfree(dev);
+}
+
+void kvm_register_vgic_device(unsigned long type)
+{
+ switch (type) {
+ case KVM_DEV_TYPE_ARM_VGIC_V2:
+ kvm_register_device_ops(&kvm_arm_vgic_v2_ops,
+ KVM_DEV_TYPE_ARM_VGIC_V2);
+ break;
+#ifdef CONFIG_KVM_ARM_VGIC_V3
+ case KVM_DEV_TYPE_ARM_VGIC_V3:
+ kvm_register_device_ops(&kvm_arm_vgic_v3_ops,
+ KVM_DEV_TYPE_ARM_VGIC_V3);
+ break;
+#endif
+ }
+}
+
+/* V2 ops */
+
+static int vgic_v2_set_attr(struct kvm_device *dev,
+ struct kvm_device_attr *attr)
+{
+ return -ENXIO;
+}
+
+static int vgic_v2_get_attr(struct kvm_device *dev,
+ struct kvm_device_attr *attr)
+{
+ return -ENXIO;
+}
+
+static int vgic_v2_has_attr(struct kvm_device *dev,
+ struct kvm_device_attr *attr)
+{
+ return -ENXIO;
+}
+
+struct kvm_device_ops kvm_arm_vgic_v2_ops = {
+ .name = "kvm-arm-vgic-v2",
+ .create = vgic_create,
+ .destroy = vgic_destroy,
+ .set_attr = vgic_v2_set_attr,
+ .get_attr = vgic_v2_get_attr,
+ .has_attr = vgic_v2_has_attr,
+};
+
+/* V3 ops */
+
+#ifdef CONFIG_KVM_ARM_VGIC_V3
+
+static int vgic_v3_set_attr(struct kvm_device *dev,
+ struct kvm_device_attr *attr)
+{
+ return -ENXIO;
+}
+
+static int vgic_v3_get_attr(struct kvm_device *dev,
+ struct kvm_device_attr *attr)
+{
+ return -ENXIO;
+}
+
+static int vgic_v3_has_attr(struct kvm_device *dev,
+ struct kvm_device_attr *attr)
+{
+ return -ENXIO;
+}
+
+struct kvm_device_ops kvm_arm_vgic_v3_ops = {
+ .name = "kvm-arm-vgic-v3",
+ .create = vgic_create,
+ .destroy = vgic_destroy,
+ .set_attr = vgic_v3_set_attr,
+ .get_attr = vgic_v3_get_attr,
+ .has_attr = vgic_v3_has_attr,
+};
+
+#endif /* CONFIG_KVM_ARM_VGIC_V3 */
+
diff --git a/virt/kvm/arm/vgic/vgic.h b/virt/kvm/arm/vgic/vgic.h
index 44c6a1b..77b0ab3 100644
--- a/virt/kvm/arm/vgic/vgic.h
+++ b/virt/kvm/arm/vgic/vgic.h
@@ -73,4 +73,6 @@ static inline int vgic_register_redist_iodevs(struct kvm *kvm,
}
#endif
+void kvm_register_vgic_device(unsigned long type);
+
#endif