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Message-ID: <5cadb0b3-5e8f-110b-c6ed-4adaea033e58@redhat.com> Date: Mon, 4 Oct 2021 10:58:28 +0200 From: Paolo Bonzini <pbonzini@...hat.com> To: Anup Patel <anup.patel@....com>, Palmer Dabbelt <palmer@...belt.com>, Palmer Dabbelt <palmerdabbelt@...gle.com>, Paul Walmsley <paul.walmsley@...ive.com>, Albert Ou <aou@...s.berkeley.edu> Cc: Alexander Graf <graf@...zon.com>, Atish Patra <atish.patra@....com>, Alistair Francis <Alistair.Francis@....com>, Damien Le Moal <damien.lemoal@....com>, Anup Patel <anup@...infault.org>, kvm@...r.kernel.org, kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v20 00/17] KVM RISC-V Support 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
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