linux-kernel - Re: [PATCH v2 11/12] RISC-V: KVM: Allow Zcmop extension for Guest/VM

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Date: Thu, 18 Apr 2024 18:51:16 +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 11/12] RISC-V: KVM: Allow Zcmop extension 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 Zcmop extension 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 | 1 +
>  arch/riscv/kvm/vcpu_onereg.c      | 2 ++
>  2 files changed, 3 insertions(+)
>
> diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
> index 57db3fea679f..0366389a0bae 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -172,6 +172,7 @@ enum KVM_RISCV_ISA_EXT_ID {
>         KVM_RISCV_ISA_EXT_ZCB,
>         KVM_RISCV_ISA_EXT_ZCD,
>         KVM_RISCV_ISA_EXT_ZCF,
> +       KVM_RISCV_ISA_EXT_ZCMOP,
>         KVM_RISCV_ISA_EXT_MAX,
>  };
>
> diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
> index a2747a6dbdb6..77a0d337faeb 100644
> --- a/arch/riscv/kvm/vcpu_onereg.c
> +++ b/arch/riscv/kvm/vcpu_onereg.c
> @@ -52,6 +52,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
>         KVM_ISA_EXT_ARR(ZCB),
>         KVM_ISA_EXT_ARR(ZCD),
>         KVM_ISA_EXT_ARR(ZCF),
> +       KVM_ISA_EXT_ARR(ZCMOP),
>         KVM_ISA_EXT_ARR(ZFA),
>         KVM_ISA_EXT_ARR(ZFH),
>         KVM_ISA_EXT_ARR(ZFHMIN),
> @@ -136,6 +137,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
>         case KVM_RISCV_ISA_EXT_ZCB:
>         case KVM_RISCV_ISA_EXT_ZCD:
>         case KVM_RISCV_ISA_EXT_ZCF:
> +       case KVM_RISCV_ISA_EXT_ZCMOP:
>         case KVM_RISCV_ISA_EXT_ZFA:
>         case KVM_RISCV_ISA_EXT_ZFH:
>         case KVM_RISCV_ISA_EXT_ZFHMIN:
> --
> 2.43.0
>