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charset="utf-8" From: Yingshiuan Pan GenieZone is MediaTek proprietary hypervisor solution, and it is running in EL2 stand alone as a type-I hypervisor. It is a pure EL2 implementation which implies it does not rely any specific host VM, and this behavior improves GenieZone's security as it limits its interface. Signed-off-by: Yingshiuan Pan Co-developed-by: Yi-De Wu Signed-off-by: Yi-De Wu Signed-off-by: Liju Chen --- Documentation/virt/geniezone/introduction.rst | 87 +++++++++++++++++++ Documentation/virt/index.rst | 1 + MAINTAINERS | 6 ++ 3 files changed, 94 insertions(+) create mode 100644 Documentation/virt/geniezone/introduction.rst diff --git a/Documentation/virt/geniezone/introduction.rst b/Documentation/= virt/geniezone/introduction.rst new file mode 100644 index 000000000000..206b019f777b --- /dev/null +++ b/Documentation/virt/geniezone/introduction.rst @@ -0,0 +1,87 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D +GenieZone Introduction +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D + +Overview +=3D=3D=3D=3D=3D=3D=3D=3D +GenieZone hypervisor (gzvm) is a type-I hypervisor that supports various v= irtual +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 Geni= eZone +hypervisor kernel driver (also named gzvm) to leverage the ability of Linux +kernel for vCPU scheduling, memory management, inter-VM communication and = virtio +backend support. + +Supported Architecture +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D +GenieZone now only supports MediaTek ARM64 SoC. + +Features +=3D=3D=3D=3D=3D=3D=3D=3D + +- 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 pow= er + 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 sec= urity + reason. With the help of the gzvm module, the hypervisor is able to mani= pulate + memory as objects. + +- Virtual Platform + + The gzvm hypervisor emulates a virtual mobile platform for guest OS runn= ing on + guest VM. The platform supports various architecture-defined devices, su= ch as + virtual arch timer, GIC, MMIO, PSCI, and exception watching...etc. + +- Inter-VM Communication + + Communication among guest VMs is provided mainly on RPC. More communicat= ion + mechanisms will be provided in the future based on VirtIO-vsock. + +- Device Virtualization + + The solution is provided using the well-known VirtIO. The gzvm module re= directs + 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 are handled by GenieZone + hypervisor with the help of gzvm module, both virtual and physical ones. + In case there's no guest VM running, physical interrupts are handled by = host + VM directly for performance reason. Irqfd is also implemented using even= tfd + for accepting vIRQ requests in gzvm module. + +Platform architecture component +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D + +- vm + + The vm component is responsible for setting up the capability and memory + management for the protected VMs. The capability is mainly about the lif= ecycle + control and boot context initialization. And the memory management is hi= ghly + 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 an aarch64 physical CPU, = and it + controls the vCPU lifecycle including creating, running and destroying. + With self-defined exit handler, the vm component is able to act accordin= gly + before termination. + +- vgic + + The vgic component exposes control interfaces to Linux kernel via irqchi= p, and + we intend to support all SPI, PPI, and SGI. When it comes to virtual + interrupts, the GenieZone hypervisor writes to list registers and trigge= rs + vIRQ injection in guest VMs via GIC. diff --git a/Documentation/virt/index.rst b/Documentation/virt/index.rst index 7fb55ae08598..cf12444db336 100644 --- a/Documentation/virt/index.rst +++ b/Documentation/virt/index.rst @@ -16,6 +16,7 @@ Virtualization Support coco/sev-guest coco/tdx-guest hyperv/index + geniezone/introduction =20 .. only:: html and subproject =20 diff --git a/MAINTAINERS b/MAINTAINERS index 279560bf2b6d..bd119e707b7f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9671,6 +9671,12 @@ F: include/vdso/ F: kernel/time/vsyscall.c F: lib/vdso/ =20 +GENIEZONE HYPERVISOR DRIVER +M: Yingshiuan Pan +M: Ze-Yu Wang +M: Liju Chen +F: Documentation/virt/geniezone/ + GENWQE (IBM Generic Workqueue Card) M: Frank Haverkamp S: Supported --=20 2.18.0