On 27/09/21 13:39, Anup Patel wrote:
This series adds initial KVM RISC-V support. Currently, we are able to boot Linux on RV64/RV32 Guest with multiple VCPUs. Key aspects of KVM RISC-V added by this series are: 1. No RISC-V specific KVM IOCTL 2. Loadable KVM RISC-V module supported 3. Minimal possible KVM world-switch which touches only GPRs and few CSRs 4. Both RV64 and RV32 host supported 5. Full Guest/VM switch is done via vcpu_get/vcpu_put infrastructure 6. KVM ONE_REG interface for VCPU register access from user-space 7. PLIC emulation is done in user-space 8. Timer and IPI emuation is done in-kernel 9. Both Sv39x4 and Sv48x4 supported for RV64 host 10. MMU notifiers supported 11. Generic dirtylog supported 12. FP lazy save/restore supported 13. SBI v0.1 emulation for KVM Guest available 14. Forward unhandled SBI calls to KVM userspace 15. Hugepage support for Guest/VM 16. IOEVENTFD support for Vhost Here's a brief TODO list which we will work upon after this series: 1. KVM unit test support 2. KVM selftest support 3. SBI v0.3 emulation in-kernel 4. In-kernel PMU virtualization 5. In-kernel AIA irqchip support 6. Nested virtualizaiton 7. ..... and more .....
Looks good, I prepared a tag "for-riscv" at https://git.kernel.org/pub/scm/virt/kvm/kvm.git. Palmer can pull it and you can use it to send me a pull request.
I look forward to the test support. :) Would be nice to have selftest support already in 5.16, since there are a few arch-independent selftests that cover the hairy parts of the MMU.
Paolo
