linux-kernel - Re: [PATCH 3/4] RISC-V: KVM: Allow Ziccrse extension for Guest/VM

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Message-ID: <20241128-9f7234d55cedf2afd881f82a@orel>
Date: Thu, 28 Nov 2024 09:54:44 +0100
From: Andrew Jones <ajones@...tanamicro.com>
To: zhouquan@...as.ac.cn
Cc: anup@...infault.org, atishp@...shpatra.org, paul.walmsley@...ive.com, 
	palmer@...belt.com, aou@...s.berkeley.edu, linux-kernel@...r.kernel.org, 
	linux-riscv@...ts.infradead.org, kvm@...r.kernel.org, kvm-riscv@...ts.infradead.org
Subject: Re: [PATCH 3/4] RISC-V: KVM: Allow Ziccrse extension for Guest/VM

On Thu, Nov 28, 2024 at 11:22:07AM +0800, zhouquan@...as.ac.cn wrote:
> From: Quan Zhou <zhouquan@...as.ac.cn>
> 
> Extend the KVM ISA extension ONE_REG interface to allow KVM user space
> to detect and enable Ziccrse extension for Guest/VM.
> 
> Signed-off-by: Quan Zhou <zhouquan@...as.ac.cn>
> ---
>  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 340618131249..f7afb4267148 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -179,6 +179,7 @@ enum KVM_RISCV_ISA_EXT_ID {
>  	KVM_RISCV_ISA_EXT_SSNPM,
>  	KVM_RISCV_ISA_EXT_SVVPTC,
>  	KVM_RISCV_ISA_EXT_ZABHA,
> +	KVM_RISCV_ISA_EXT_ZICCRSE,
>  	KVM_RISCV_ISA_EXT_MAX,
>  };
>  
> diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
> index 9a30a98f30bc..ed8e17da1536 100644
> --- a/arch/riscv/kvm/vcpu_onereg.c
> +++ b/arch/riscv/kvm/vcpu_onereg.c
> @@ -64,6 +64,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
>  	KVM_ISA_EXT_ARR(ZFHMIN),
>  	KVM_ISA_EXT_ARR(ZICBOM),
>  	KVM_ISA_EXT_ARR(ZICBOZ),
> +	KVM_ISA_EXT_ARR(ZICCRSE),
>  	KVM_ISA_EXT_ARR(ZICNTR),
>  	KVM_ISA_EXT_ARR(ZICOND),
>  	KVM_ISA_EXT_ARR(ZICSR),
> @@ -157,6 +158,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
>  	case KVM_RISCV_ISA_EXT_ZFA:
>  	case KVM_RISCV_ISA_EXT_ZFH:
>  	case KVM_RISCV_ISA_EXT_ZFHMIN:
> +	case KVM_RISCV_ISA_EXT_ZICCRSE:
>  	case KVM_RISCV_ISA_EXT_ZICNTR:
>  	case KVM_RISCV_ISA_EXT_ZICOND:
>  	case KVM_RISCV_ISA_EXT_ZICSR:
> -- 
> 2.34.1
>

Reviewed-by: Andrew Jones <ajones@...tanamicro.com>