Message-ID: <ZVs760ggqT-erCji@archie.me>
Date:   Mon, 20 Nov 2023 17:58:51 +0700
From:   Bagas Sanjaya <bagasdotme@...il.com>
To:     Yi-De Wu <yi-de.wu@...iatek.com>,
        Yingshiuan Pan <yingshiuan.pan@...iatek.com>,
        Ze-Yu Wang <ze-yu.wang@...iatek.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Jonathan Corbet <corbet@....net>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
Cc:     Arnd Bergmann <arnd@...db.de>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-doc@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        David Bradil <dbrazdil@...gle.com>,
        Trilok Soni <quic_tsoni@...cinc.com>,
        Jade Shih <jades.shih@...iatek.com>,
        Ivan Tseng <ivan.tseng@...iatek.com>,
        My Chuang <my.chuang@...iatek.com>,
        Shawn Hsiao <shawn.hsiao@...iatek.com>,
        PeiLun Suei <peilun.suei@...iatek.com>,
        Liju Chen <liju-clr.chen@...iatek.com>,
        Willix Yeh <chi-shen.yeh@...iatek.com>,
        Kevenny Hsieh <kevenny.hsieh@...iatek.com>
Subject: Re: [PATCH v7 01/16] docs: geniezone: Introduce GenieZone hypervisor

On Thu, Nov 16, 2023 at 11:27:41PM +0800, Yi-De Wu wrote:
> diff --git a/Documentation/virt/geniezone/introduction.rst b/Documentation/virt/geniezone/introduction.rst
> new file mode 100644
> index 000000000000..fb9fa41bcfb8
> --- /dev/null
> +++ b/Documentation/virt/geniezone/introduction.rst
> @@ -0,0 +1,86 @@
> +.. SPDX-License-Identifier: GPL-2.0
> +
> +======================
> +GenieZone Introduction
> +======================
> +
> +Overview
> +========
> +GenieZone hypervisor(gzvm) is a type-1 hypervisor that supports various virtual
"... hypervisor (gzvm) ..."
> +machine types and provides security features such as TEE-like scenarios and
> +secure boot. It can create guest VMs for security use cases and has
> +virtualization capabilities for both platform and interrupt. Although the
> +hypervisor can be booted independently, it requires the assistance of GenieZone
> +hypervisor kernel driver(gzvm-ko) to leverage the ability of Linux kernel for
"hypervisor kernel driver (also named gzvm) ..."
> +vCPU scheduling, memory management, inter-VM communication and virtio backend
> +support.
> +
> +Supported Architecture
> +======================
> +GenieZone now only supports MediaTek ARM64 SoC.
> +
> +Features
> +========
> +
> +- vCPU Management
> +
> +VM manager aims to provide vCPUs on the basis of time sharing on physical CPUs.
> +It requires Linux kernel in host VM for vCPU scheduling and VM power management.
> +
> +- Memory Management
> +
> +Direct use of physical memory from VMs is forbidden and designed to be dictated
> +to the privilege models managed by GenieZone hypervisor for security reason.
> +With the help of gzvm-ko, the hypervisor would be able to manipulate memory as

s/gzvm-ko/gzvm module/g

> +objects.
> +
> +- Virtual Platform
> +
> +We manage to emulate a virtual mobile platform for guest OS running on guest
> +VM. The platform supports various architecture-defined devices, such as
> +virtual arch timer, GIC, MMIO, PSCI, and exception watching...etc.
> +
> +- Inter-VM Communication
> +
> +Communication among guest VMs was provided mainly on RPC. More communication
> +mechanisms were to be provided in the future based on VirtIO-vsock.
> +
> +- Device Virtualization
> +
> +The solution is provided using the well-known VirtIO. The gzvm-ko would
> +redirect MMIO traps back to VMM where the virtual devices are mostly emulated.
> +Ioeventfd is implemented using eventfd for signaling host VM that some IO
> +events in guest VMs need to be processed.
> +
> +- Interrupt virtualization
> +
> +All Interrupts during some guest VMs running would be handled by GenieZone
> +hypervisor with the help of gzvm-ko, both virtual and physical ones. In case
> +there's no guest VM running out there, physical interrupts would be handled by
> +host VM directly for performance reason. Irqfd is also implemented using
> +eventfd for accepting vIRQ requests in gzvm-ko.
> +
> +Platform architecture component
> +===============================
> +
> +- vm
> +
> +The vm component is responsible for setting up the capability and memory
> +management for the protected VMs. The capability is mainly about the lifecycle
> +control and boot context initialization. And the memory management is highly
> +integrated with ARM 2-stage translation tables to convert VA to IPA to PA under
> +proper security measures required by protected VMs.
> +
> +- vcpu
> +
> +The vcpu component is the core of virtualizing aarch64 physical CPU runnable,
> +and it controls the vCPU lifecycle including creating, running and destroying.
> +With self-defined exit handler, the vm component would be able to act
> +accordingly before terminated.
> +
> +- vgic
> +
> +The vgic component exposes control interfaces to Linux kernel via irqchip, and
> +we intend to support all SPI, PPI, and SGI. When it comes to virtual
> +interrupts, the GenieZone hypervisor would write to list registers and trigger
> +vIRQ injection in guest VMs via GIC.

Descriptions for feature lists can be aligned:

---- >8 ----
diff --git a/Documentation/virt/geniezone/introduction.rst b/Documentation/virt/geniezone/introduction.rst
index fb9fa41bcfb8b3..f37ddf4e979992 100644
--- a/Documentation/virt/geniezone/introduction.rst
+++ b/Documentation/virt/geniezone/introduction.rst
@@ -24,63 +24,64 @@ Features
 
 - vCPU Management
 
-VM manager aims to provide vCPUs on the basis of time sharing on physical CPUs.
-It requires Linux kernel in host VM for vCPU scheduling and VM power management.
+  VM manager aims to provide vCPUs on the basis of time sharing on physical
+  CPUs. It requires Linux kernel in host VM for vCPU scheduling and VM power
+  management.
 
 - Memory Management
 
-Direct use of physical memory from VMs is forbidden and designed to be dictated
-to the privilege models managed by GenieZone hypervisor for security reason.
-With the help of gzvm-ko, the hypervisor would be able to manipulate memory as
-objects.
+  Direct use of physical memory from VMs is forbidden and designed to be
+  dictated to the privilege models managed by GenieZone hypervisor for security
+  reason. With the help of gzvm-ko, the hypervisor would be able to manipulate
+  memory as objects.
 
 - Virtual Platform
 
-We manage to emulate a virtual mobile platform for guest OS running on guest
-VM. The platform supports various architecture-defined devices, such as
-virtual arch timer, GIC, MMIO, PSCI, and exception watching...etc.
+  We manage to emulate a virtual mobile platform for guest OS running on guest
+  VM. The platform supports various architecture-defined devices, such as
+  virtual arch timer, GIC, MMIO, PSCI, and exception watching...etc.
 
 - Inter-VM Communication
 
-Communication among guest VMs was provided mainly on RPC. More communication
-mechanisms were to be provided in the future based on VirtIO-vsock.
+  Communication among guest VMs was provided mainly on RPC. More communication
+  mechanisms were to be provided in the future based on VirtIO-vsock.
 
 - Device Virtualization
 
-The solution is provided using the well-known VirtIO. The gzvm-ko would
-redirect MMIO traps back to VMM where the virtual devices are mostly emulated.
-Ioeventfd is implemented using eventfd for signaling host VM that some IO
-events in guest VMs need to be processed.
+  The solution is provided using the well-known VirtIO. The gzvm-ko would
+  redirect MMIO traps back to VMM where the virtual devices are mostly
+  emulated. Ioeventfd is implemented using eventfd for signaling host VM that
+  some IO events in guest VMs need to be processed.
 
 - Interrupt virtualization
 
-All Interrupts during some guest VMs running would be handled by GenieZone
-hypervisor with the help of gzvm-ko, both virtual and physical ones. In case
-there's no guest VM running out there, physical interrupts would be handled by
-host VM directly for performance reason. Irqfd is also implemented using
-eventfd for accepting vIRQ requests in gzvm-ko.
+  All Interrupts during some guest VMs running would be handled by GenieZone
+  hypervisor with the help of gzvm-ko, both virtual and physical ones. In case
+  there's no guest VM running out there, physical interrupts would be handled
+  by host VM directly for performance reason. Irqfd is also implemented using
+  eventfd for accepting vIRQ requests in gzvm-ko.
 
 Platform architecture component
 ===============================
 
 - vm
 
-The vm component is responsible for setting up the capability and memory
-management for the protected VMs. The capability is mainly about the lifecycle
-control and boot context initialization. And the memory management is highly
-integrated with ARM 2-stage translation tables to convert VA to IPA to PA under
-proper security measures required by protected VMs.
+  The vm component is responsible for setting up the capability and memory
+  management for the protected VMs. The capability is mainly about the
+  lifecycle control and boot context initialization. And the memory management
+  is highly integrated with ARM 2-stage translation tables to convert VA to IPA
+  to PA under proper security measures required by protected VMs.
 
 - vcpu
 
-The vcpu component is the core of virtualizing aarch64 physical CPU runnable,
-and it controls the vCPU lifecycle including creating, running and destroying.
-With self-defined exit handler, the vm component would be able to act
-accordingly before terminated.
+  The vcpu component is the core of virtualizing aarch64 physical CPU runnable,
+  and it controls the vCPU lifecycle including creating, running and
+  destroying. With self-defined exit handler, the vm component would be able to
+  act accordingly before terminated.
 
 - vgic
 
-The vgic component exposes control interfaces to Linux kernel via irqchip, and
-we intend to support all SPI, PPI, and SGI. When it comes to virtual
-interrupts, the GenieZone hypervisor would write to list registers and trigger
-vIRQ injection in guest VMs via GIC.
+  The vgic component exposes control interfaces to Linux kernel via irqchip,
+  and we intend to support all SPI, PPI, and SGI. When it comes to virtual
+  interrupts, the GenieZone hypervisor would write to list registers and
+  trigger vIRQ injection in guest VMs via GIC.

Thanks.

-- 
An old man doll... just what I always wanted! - Clara

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