linux-kernel - Re: [PATCH v2 06/12] RISC-V: KVM: Allow Zca, Zcf, Zcd and Zcb extensions for Guest/VM

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Date: Thu, 18 Apr 2024 18:50:21 +0530
From: Anup Patel <anup@...infault.org>
To: Clément Léger <cleger@...osinc.com>
Cc: Jonathan Corbet <corbet@....net>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Conor Dooley <conor@...nel.org>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Shuah Khan <shuah@...nel.org>, 
	Atish Patra <atishp@...shpatra.org>, linux-doc@...r.kernel.org, 
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	devicetree@...r.kernel.org, kvm@...r.kernel.org, 
	kvm-riscv@...ts.infradead.org, linux-kselftest@...r.kernel.org
Subject: Re: [PATCH v2 06/12] RISC-V: KVM: Allow Zca, Zcf, Zcd and Zcb
 extensions for Guest/VM

On Thu, Apr 18, 2024 at 6:14 PM Clément Léger <cleger@...osinc.com> wrote:
>
> Extend the KVM ISA extension ONE_REG interface to allow KVM user space
> to detect and enable Zca, Zcf, Zcd and Zcb extensions for Guest/VM.
>
> Signed-off-by: Clément Léger <cleger@...osinc.com>

LGTM.

Reviewed-by: Anup Patel <anup@...infault.org>
Acked-by: Anup Patel <anup@...infault.org>

Thanks,
Anup

> ---
>  arch/riscv/include/uapi/asm/kvm.h | 4 ++++
>  arch/riscv/kvm/vcpu_onereg.c      | 8 ++++++++
>  2 files changed, 12 insertions(+)
>
> diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
> index 35a12aa1953e..57db3fea679f 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -168,6 +168,10 @@ enum KVM_RISCV_ISA_EXT_ID {
>         KVM_RISCV_ISA_EXT_ZTSO,
>         KVM_RISCV_ISA_EXT_ZACAS,
>         KVM_RISCV_ISA_EXT_ZIMOP,
> +       KVM_RISCV_ISA_EXT_ZCA,
> +       KVM_RISCV_ISA_EXT_ZCB,
> +       KVM_RISCV_ISA_EXT_ZCD,
> +       KVM_RISCV_ISA_EXT_ZCF,
>         KVM_RISCV_ISA_EXT_MAX,
>  };
>
> diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
> index 12436f6f0d20..a2747a6dbdb6 100644
> --- a/arch/riscv/kvm/vcpu_onereg.c
> +++ b/arch/riscv/kvm/vcpu_onereg.c
> @@ -48,6 +48,10 @@ static const unsigned long kvm_isa_ext_arr[] = {
>         KVM_ISA_EXT_ARR(ZBKC),
>         KVM_ISA_EXT_ARR(ZBKX),
>         KVM_ISA_EXT_ARR(ZBS),
> +       KVM_ISA_EXT_ARR(ZCA),
> +       KVM_ISA_EXT_ARR(ZCB),
> +       KVM_ISA_EXT_ARR(ZCD),
> +       KVM_ISA_EXT_ARR(ZCF),
>         KVM_ISA_EXT_ARR(ZFA),
>         KVM_ISA_EXT_ARR(ZFH),
>         KVM_ISA_EXT_ARR(ZFHMIN),
> @@ -128,6 +132,10 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
>         case KVM_RISCV_ISA_EXT_ZBKC:
>         case KVM_RISCV_ISA_EXT_ZBKX:
>         case KVM_RISCV_ISA_EXT_ZBS:
> +       case KVM_RISCV_ISA_EXT_ZCA:
> +       case KVM_RISCV_ISA_EXT_ZCB:
> +       case KVM_RISCV_ISA_EXT_ZCD:
> +       case KVM_RISCV_ISA_EXT_ZCF:
>         case KVM_RISCV_ISA_EXT_ZFA:
>         case KVM_RISCV_ISA_EXT_ZFH:
>         case KVM_RISCV_ISA_EXT_ZFHMIN:
> --
> 2.43.0
>