Linux's KVM Sees Patches For RISC-V Support

[phoronix]

Phoronix: Linux's KVM Sees Patches For RISC-V Support

In continuation of the article last week how the RISC-V Linux kernel support has been maturing and various missing gaps filled in, another feature just arrived in patch form: support for KVM virtualization...

http://www.phoronix.com/scan.php?page=news_item&px=Linux-KVM-RISC-V-Patches

[rene]

can't wait to get my hands on a high performance RISCV board, ..! But I guess that will be some more month and I will do some pico riscv fpga before that, ... ;-) https://www.youtube.com/watch?v=eE-FeFWG28w

[uid313]

There is also support for RISV-V in QEMU.
What I think is needed now, is RISC-V support for Rust which I think only has RISC-V 32 but not 64 support.

[programmerjake]

There is also support for RISV-V in QEMU.
What I think is needed now, is RISC-V support for Rust which I think only has RISC-V 32 but not 64 support.

Rust nightly has support for 32 and 64-bit RISC-V, what's not supported is targeting RISC-V Linux. See https://rust.godbolt.org/z/CJvDw_

Rust RISC-V target list (for rustc 1.38.0-nightly (4560cb830 2019-07-28)):
riscv32i-unknown-none-elf
riscv32imac-unknown-none-elf
riscv32imc-unknown-none-elf
riscv64gc-unknown-none-elf
riscv64imac-unknown-none-elf

[uid313]

Rust nightly has support for 32 and 64-bit RISC-V, what's not supported is targeting RISC-V Linux. See https://rust.godbolt.org/z/CJvDw_

Rust RISC-V target list (for rustc 1.38.0-nightly (4560cb830 2019-07-28)):
riscv32i-unknown-none-elf
riscv32imac-unknown-none-elf
riscv32imc-unknown-none-elf
riscv64gc-unknown-none-elf
riscv64imac-unknown-none-elf

Ah, I see. Well I think maybe Rust used LLVM which only supported 32-bit RISC-V. I am not sure.

[programmerjake]

Ah, I see. Well I think maybe Rust used LLVM which only supported 32-bit RISC-V. I am not sure.

rustc (the official compiler for Rust; there are other compilers) does use LLVM. LLVM recently gained full support for 32 and 64-bit RISC-V with HW floating point (RV32GC and RV64GC). Rust does not yet implement Linux support on RISC-V (hoping that happens soon).