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Refactoring of the home page. Adding a page for virtual machine monitors.
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lukas
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virt/vm/firmware.md
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@@ -10,34 +10,37 @@ dateCreated: 2022-01-25T14:50:10.751Z
# Platform firmware
Virtual devices, including virtual chipsets, are shipping alongside platform firmware.
Virtual devices, including virtual chipsets, are shipping alongside platform firmware.
> ***Definition**: Firmware are software that are tightly integrated with the hardware. Almost every devices are shipping with some kind of firmware associated to it. For instance, motherboards include such programs, which in their case is tasked to properly boot hardware devices such as RAM modules, check their state and make them ready-to-use by an operating system*
{.is-info}
## Available platform firmware for virtual machines
## Common platform firmware for virtual machines
### SeaBIOS
[SeaBIOS](https://www.seabios.org/SeaBIOS) is an implementation of a x86 BIOS which relies on [Coreboot](https://www.coreboot.org/) and can be used to boot virtual machines. It is incompatible with UEFI. It is also simpler.
[SeaBIOS](https://www.seabios.org/SeaBIOS) is an implementation of an x86 BIOS which relies on [coreboot](https://www.coreboot.org/). It is used for legacy systems, but also to specialized and cloud optimized guests systems which don't require UEFI.
### OVMF
[OVMF](https://github.com/tianocore/tianocore.github.io/wiki/OVMF), which stands for Open Virtual Machine Firmware, is a UEFI-compatible firmware. It is based on the larger [TianoCore](https://www.tianocore.org/) project, which provides an open-source implementation of a platform firmware that follows UEFI specifications. It is the default method to boot UEFI-based operating systems in a virtual machine.
[OVMF](https://github.com/tianocore/tianocore.github.io/wiki/OVMF), which stands for Open Virtual Machine Firmware, is a UEFI-compatible firmware.
It is based on the [TianoCore](https://www.tianocore.org/) project, which provides an open-source implementation of a platform firmware that follows UEFI specifications.
It is the default method to boot UEFI-based operating systems in a virtual machine.
### Rust Hypervisor Firmware
The [Rust Hypervisor Firmware](https://github.com/cloud-hypervisor/rust-hypervisor-firmware) (RHF) is a UEFI-compatible firmware. It is focused on simplicity and performance and is designed for virtual workloads. It is tightly integrated with the Cloud Hypervisor.
The [Rust Hypervisor Firmware](https://github.com/cloud-hypervisor/rust-hypervisor-firmware) (RHF) is a UEFI-compatible firmware. It is focused on simplicity and performance and is designed to run cloud-centric operating systems.
## Comparison
It is developed alongside the Cloud Hypervisor.
## Supported features
| | SeaBIOS | OVMF | RHF |
| :-- | :-: | :-: | :-: |
| *BIOS* | **Yes** | No | No |
| *UEFI* | No | **Yes** | **Yes** |
| *Secureboot* | No | **Yes** | **Yes** |
| *Chipset support* | [`i440fx`](/virt/vm/chipset#i440fx) / [`Q35`](/virt/vm/chipset#q35) | [`i440fx`](/virt/vm/chipset#i440fx) / [`Q35`](/virt/vm/chipset#q35) | [`Q35`](/virt/vm/chipset#q35)? / [`virt`](/virt/vm/chipset#virt) |
| *Guest support* | **Linux** / **Windows** | **Linux** / **Darwin** / **Windows** | **Linux** / **Windows** |
| *Secure Boot* | No | **Yes** | ? |
| *Chipset* | [i440fx](/virt/vm/chipset#i440fx), [Q35](/virt/vm/chipset#q35) | [i440f](/virt/vm/chipset#i440fx), [Q35](/virt/vm/chipset#q35) | [virt](/virt/vm/chipset#virt) |
| *Guests* | **Linux**, **Windows** | **Linux**, **Darwin**, **Windows** | **Linux**, **Windows** |
| *Virtual Function I/O (VFIO)* | No | **Yes** | **Yes** |
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