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RVVM

Background

RVVM is a RISC-V CPU & System software implementation written in С, it features

  • Passes RISC-V compliance/torture tests for both RV64 & RV32
  • OpenSBI, U-Boot, custom firmwares boot and execute properly
  • Working Linux, FreeBSD, OpenBSD, Haiku OS & other cool OSes
  • Tracing JIT, multicore support
  • Framebuffer display, mouse & keyboard, UART shell
  • NVMe storage drives
  • Networking

The RVVM core has been authored by

The RVVM core is licensed under

A summary of the licenses behind RetroArch and its cores can be found here.

Extensions

Content that can be loaded by the RVVM core have the following file extensions:

  • .rvvm

See the Usage section for an explanation regarding its format.

Features

Frontend-level settings or features that the RVVM core respects.

Feature Supported
Restart -
Saves ✕
States ✕
Rewind ✕
Netplay ✕
Core Options ✕
Memory Monitoring (achievements) ✕
RetroArch Cheats ✕
Native Cheats ✕
Controls ✔
Remapping -
Multi-Mouse -
Rumble ✕
Sensors ✕
Camera ✕
Location ✕
Subsystem ✕
Softpatching ✕
Disk Control ✕
Username ✕
Language ✕
Crop Overscan ✕
LEDs ✕

Geometry and timing

  • The RVVM core's core provided FPS is 60.
  • The RVVM core's core provided sample rate is 44100.
  • The RVVM core's base width is 640.
  • The RVVM core's base height is 480.
  • The RVVM core's max width is 640.
  • The RVVM core's max height is 480.
  • The RVVM core's core provided aspect ratio is 4/3.

Usage

The RVVM core reads its machine options from a plaintext .rvvm file, each line should be a supported option, for example a linux.rvvm file:

rv64
bootrom=opensbi.img
kernel=linux.img
nvme=disk1.img
nvme=disk2.img

Will run Linux on a 64-bit RISC-V machine, firmware image files will be loaded from the same directory of the rvvm file.

And following options are supported:

  • rv64: Enable 64-bit RISC-V, which is the default.
  • rv32: Enable 32-bit RISC-V.
  • mem=N: Set memory to N MiB, N is an integer like 512, default to 256.
  • smp=N: Set amount of CPU cores to N, default to 1.
  • bootrom=FILE: Load M-mode firmware (eg: OpenSBI) from FILE.
  • kernel=FILE: Load S-mode kernel (eg: Linux, U-Boot, etc.) from FILE.
  • nvme=FILE: Attach NVMe storage image (RAW format) from FILE, can be repeated at most 4 times (the first one will be /dev/nvme0, the last one will be /dev/nvme3).
  • cmdline=ARGS: Set kernel command line to ARGS, default to root=/dev/nvme0n1 rootflags=discard rw console=tty0.

Device types

The RVVM core supports the following device type(s) in the controls menu, bolded device types are the default for the specified user(s):

  • Keyboard
  • Mouse