Does anyone ever try Framework RISC-V mainboard + QubeOS?
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Unfortunately it is not supported. Qubes only supports the X86 architecture. I believe there have been some efforts to port qubes to arm64, but to my knowledge, nothing has come of it.
As for risc-v, it looks like support was just added in xen 4.20, while qubes 4.2 is on xen 4.17 and 4.3 is on 4.19 I believe. The other problem is that linux support of risc-v is in its infancy, and processor support is hit or miss. I also don’t know if any risc-v chips available support the virtualization features necessary for qubes.
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If you like to dabble:
I have not attempted to use a RISC/V chip
Others write that there are not a lot needed Applications Software for RISC/V.
And that the available RISC/V Processors that are fast enough for what they want. I dunno???
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As long as our x86 struggle on Qubes OS in term of performance due to lack of hardware accelerated rendering, it’s not going to be any close to the current performance on RISC or arm64 platforms unfortunately.
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BABA Stock 
“RVA23 compatibility matters because it’s a cornerstone of the RISC-V ecosystem, ratified last year, and among other things specifies hypervisor extensions that are all-but-essential for a processor intended for deployment in servers, clouds, or other large-scale scenarios where the ability to run virtual machines is table stakes. By being RVA23 ready, the C930 meets a baseline expected of modern RISC-V systems.”
The Milk-V Titan, powered by the UltraRISC UR-DP1000 8-core SoC (up to 2.0GHz), is a compact Mini ITX RISC-V board. It supports up to 64GB DDR4 ECC RAM, a PCIe Gen4 x16 slot for graphics/computing cards, and an M.2 NVMe SSD. Featuring Gigabit Ethernet, four USB 3.0 ports, and ATX power support, also support Milk-V BMC remote control, it’s perfect for high-performance RISC-V desktops and servers.
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