linux-kernel - Re: [PATCH 0/6] Add SBI v0.2 support for KVM

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Message-ID: <CAAhSdy0hrKNwOA4428Vf4mf32gZSw1cKiSXhhXB1s==yq7jEpA@mail.gmail.com>
Date:   Fri, 27 Nov 2020 13:44:52 +0530
From:   Anup Patel <anup@...infault.org>
To:     Atish Patra <atish.patra@....com>
Cc:     kvm-riscv@...ts.infradead.org,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <anup.patel@....com>,
        Kefeng Wang <wangkefeng.wang@...wei.com>,
        KVM General <kvm@...r.kernel.org>,
        "linux-kernel@...r.kernel.org List" <linux-kernel@...r.kernel.org>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Alexander Graf <graf@...zon.com>,
        Paolo Bonzini <pbonzini@...hat.com>,
        Alistair Francis <Alistair.Francis@....com>
Subject: Re: [PATCH 0/6] Add SBI v0.2 support for KVM

On Mon, Aug 3, 2020 at 11:29 PM Atish Patra <atish.patra@....com> wrote:
>
> The Supervisor Binary Interface(SBI) specification[1] now defines a
> base extension that provides extendability to add future extensions
> while maintaining backward compatibility with previous versions.
> The new version is defined as 0.2 and older version is marked as 0.1.
>
> This series adds following features to RISC-V Linux KVM.
> 1. Adds support for SBI v0.2 in KVM
> 2. SBI Hart state management extension (HSM) in KVM
> 3. Ordered booting of guest vcpus in guest Linux
>
> This series depends on the base kvm support series[2].
>
> Guest kernel needs to also support SBI v0.2 and HSM extension in Kernel
> to boot multiple vcpus. Linux kernel supports both starting v5.7.
> In absense of that, guest can only boot 1vcpu.
>
> [1] https://github.com/riscv/riscv-sbi-doc/blob/master/riscv-sbi.adoc
> [2] http://lists.infradead.org/pipermail/linux-riscv/2020-July/001028.html
>
> Atish Patra (6):
> RISC-V: Add a non-void return for sbi v02 functions
> RISC-V: Mark the existing SBI v0.1 implementation as legacy
> RISC-V: Reorganize SBI code by moving legacy SBI to its own file
> RISC-V: Add SBI v0.2 base extension
> RISC-V: Add v0.1 replacement SBI extensions defined in v02
> RISC-V: Add SBI HSM extension in KVM
>
> arch/riscv/include/asm/kvm_vcpu_sbi.h |  32 +++++
> arch/riscv/include/asm/sbi.h          |  17 ++-
> arch/riscv/kernel/sbi.c               |  32 ++---
> arch/riscv/kvm/Makefile               |   4 +-
> arch/riscv/kvm/vcpu.c                 |  19 +++
> arch/riscv/kvm/vcpu_sbi.c             | 194 ++++++++++++--------------
> arch/riscv/kvm/vcpu_sbi_base.c        |  73 ++++++++++
> arch/riscv/kvm/vcpu_sbi_hsm.c         | 109 +++++++++++++++
> arch/riscv/kvm/vcpu_sbi_legacy.c      | 129 +++++++++++++++++
> arch/riscv/kvm/vcpu_sbi_replace.c     | 136 ++++++++++++++++++
> 10 files changed, 619 insertions(+), 126 deletions(-)
> create mode 100644 arch/riscv/include/asm/kvm_vcpu_sbi.h
> create mode 100644 arch/riscv/kvm/vcpu_sbi_base.c
> create mode 100644 arch/riscv/kvm/vcpu_sbi_hsm.c
> create mode 100644 arch/riscv/kvm/vcpu_sbi_legacy.c
> create mode 100644 arch/riscv/kvm/vcpu_sbi_replace.c
>
> --
> 2.24.0
>

Please implement the SBI SRST extension in your series.

Also, the PATCH1 can be merged separately so I would suggest
you to send this patch separately.

Regards,
Anup