linux-kernel - Re: [PATCH v4 05/14] RISC-V: KVM: Return correct code for hsm stop function

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Date:   Thu, 2 Feb 2023 16:26:20 +0100
From:   Andrew Jones <ajones@...tanamicro.com>
To:     Atish Patra <atishp@...osinc.com>
Cc:     linux-kernel@...r.kernel.org, Anup Patel <anup@...infault.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Atish Patra <atishp@...shpatra.org>,
        Eric Lin <eric.lin@...ive.com>, Guo Ren <guoren@...nel.org>,
        Heiko Stuebner <heiko@...ech.de>,
        kvm-riscv@...ts.infradead.org, kvm@...r.kernel.org,
        linux-riscv@...ts.infradead.org,
        Mark Rutland <mark.rutland@....com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Will Deacon <will@...nel.org>
Subject: Re: [PATCH v4 05/14] RISC-V: KVM: Return correct code for hsm stop
 function

On Wed, Feb 01, 2023 at 03:12:41PM -0800, Atish Patra wrote:
> According to the SBI specification, the stop function can only
> return error code SBI_ERR_FAILED. However, currently it returns
> -EINVAL which will be mapped SBI_ERR_INVALID_PARAM.
> 
> Return an linux error code that maps to SBI_ERR_FAILED i.e doesn't map
> to any other SBI error code. While EACCES is not the best error code
> to describe the situation, it is close enough and will be replaced
> with SBI error codes directly anyways.
> 
> Reviewed-by: Anup Patel <anup@...infault.org>
> Signed-off-by: Atish Patra <atishp@...osinc.com>
> ---
>  arch/riscv/kvm/vcpu_sbi_hsm.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/arch/riscv/kvm/vcpu_sbi_hsm.c b/arch/riscv/kvm/vcpu_sbi_hsm.c
> index 2e915ca..619ac0f 100644
> --- a/arch/riscv/kvm/vcpu_sbi_hsm.c
> +++ b/arch/riscv/kvm/vcpu_sbi_hsm.c
> @@ -42,7 +42,7 @@ static int kvm_sbi_hsm_vcpu_start(struct kvm_vcpu *vcpu)
>  static int kvm_sbi_hsm_vcpu_stop(struct kvm_vcpu *vcpu)
>  {
>  	if (vcpu->arch.power_off)
> -		return -EINVAL;
> +		return -EACCES;
>  
>  	kvm_riscv_vcpu_power_off(vcpu);
>  
> -- 
> 2.25.1
>

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