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Subject: [PATCH v9 03/21] dt-bindings: hypervisor: Add MediaTek GenieZone hypervisor
Date: Mon, 29 Jan 2024 16:32:44 +0800
Message-ID: <20240129083302.26044-4-yi-de.wu@mediatek.com>
In-Reply-To: <20240129083302.26044-1-yi-de.wu@mediatek.com>
References: <20240129083302.26044-1-yi-de.wu@mediatek.com>
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From: "Yingshiuan Pan" <yingshiuan.pan@mediatek.com>

Add documentation for GenieZone(gzvm) node. This node informs gzvm
driver to start probing if geniezone hypervisor is available and
able to do virtual machine operations.

[Reason to use dt solution]
- The GenieZone hypervisor serves as a vendor model for facilitating
platform virtualization, with an implementation that is independent
from Linuxism.
- In contrast to the dt solution, our previous approach involved probing
via hypercall to determine the existence of our hypervisor. However, this
method raised concerns about potentially impacting all systems, including
those without the GenieZone hypervisor embedded[ref].

Link: https://lore.kernel.org/all/2fe0c7f9-55fc-ae63-3631-8526a0212ccd@linaro.org/

Signed-off-by: Yingshiuan Pan <yingshiuan.pan@mediatek.com>
Signed-off-by: Liju Chen <liju-clr.chen@mediatek.com>
Signed-off-by: Yi-De Wu <yi-de.wu@mediatek.com>
---
 .../hypervisor/mediatek,geniezone-hyp.yaml    | 31 +++++++++++++++++++
 MAINTAINERS                                   |  1 +
 2 files changed, 32 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hypervisor/mediatek,geniezone-hyp.yaml

diff --git a/Documentation/devicetree/bindings/hypervisor/mediatek,geniezone-hyp.yaml b/Documentation/devicetree/bindings/hypervisor/mediatek,geniezone-hyp.yaml
new file mode 100644
index 000000000000..ab89a4c310cb
--- /dev/null
+++ b/Documentation/devicetree/bindings/hypervisor/mediatek,geniezone-hyp.yaml
@@ -0,0 +1,31 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hypervisor/mediatek,geniezone-hyp.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek GenieZone hypervisor
+
+maintainers:
+  - Yingshiuan Pan <yingshiuan.pan@mediatek.com>
+
+description:
+  This interface is designed for integrating GenieZone hypervisor into Android
+  Virtualization Framework(AVF) along with Crosvm as a VMM.
+  It acts like a wrapper for every hypercall to GenieZone hypervisor in
+  order to control guest VM lifecycles and virtual interrupt injections.
+
+properties:
+  compatible:
+    const: mediatek,geniezone-hyp
+
+required:
+  - compatible
+
+additionalProperties: false
+
+examples:
+  - |
+    hypervisor {
+        compatible = "mediatek,geniezone-hyp";
+    };
diff --git a/MAINTAINERS b/MAINTAINERS
index 99ef21d90420..17a8e20d2baa 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -9017,6 +9017,7 @@ GENIEZONE HYPERVISOR DRIVER
 M:	Yingshiuan Pan <yingshiuan.pan@mediatek.com>
 M:	Ze-Yu Wang <ze-yu.wang@mediatek.com>
 M:	Yi-De Wu <yi-de.wu@mediatek.com>
+F:	Documentation/devicetree/bindings/hypervisor/mediatek,geniezone-hyp.yaml
 F:	Documentation/virt/geniezone/
 
 GENWQE (IBM Generic Workqueue Card)
-- 
2.18.0