linux-kernel - Re: [PATCH v3 02/12] RISC-V: KVM: Drop the return value of kvm_riscv_vcpu_aia

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Message-Id: <44722ec6-b08c-40bd-a612-40d723985aa3@lanxincomputing.com>
Date: Wed, 25 Jun 2025 14:50:10 +0800
From: "Nutty Liu" <liujingqi@...xincomputing.com>
To: "Anup Patel" <apatel@...tanamicro.com>, 
	"Atish Patra" <atish.patra@...ux.dev>
Cc: "Palmer Dabbelt" <palmer@...belt.com>, 
	"Paul Walmsley" <paul.walmsley@...ive.com>, 
	"Alexandre Ghiti" <alex@...ti.fr>, 
	"Andrew Jones" <ajones@...tanamicro.com>, 
	"Anup Patel" <anup@...infault.org>, <kvm@...r.kernel.org>, 
	<kvm-riscv@...ts.infradead.org>, <linux-riscv@...ts.infradead.org>, 
	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 02/12] RISC-V: KVM: Drop the return value of kvm_riscv_vcpu_aia_init()

On 6/18/2025 7:35 PM, Anup Patel wrote:
> The kvm_riscv_vcpu_aia_init() does not return any failure so drop
> the return value which is always zero.
>
> Reviewed-by: Nutty Liu<liujingqi@...xincomputing.com>
> Signed-off-by: Anup Patel <apatel@...tanamicro.com>
> ---
>   arch/riscv/include/asm/kvm_aia.h | 2 +-
>   arch/riscv/kvm/aia_device.c      | 6 ++----
>   arch/riscv/kvm/vcpu.c            | 4 +---
>   3 files changed, 4 insertions(+), 8 deletions(-)
>
> diff --git a/arch/riscv/include/asm/kvm_aia.h b/arch/riscv/include/asm/kvm_aia.h
> index 3b643b9efc07..0a0f12496f00 100644
> --- a/arch/riscv/include/asm/kvm_aia.h
> +++ b/arch/riscv/include/asm/kvm_aia.h
> @@ -147,7 +147,7 @@ int kvm_riscv_vcpu_aia_rmw_ireg(struct kvm_vcpu *vcpu, unsigned int csr_num,
>   
>   int kvm_riscv_vcpu_aia_update(struct kvm_vcpu *vcpu);
>   void kvm_riscv_vcpu_aia_reset(struct kvm_vcpu *vcpu);
> -int kvm_riscv_vcpu_aia_init(struct kvm_vcpu *vcpu);
> +void kvm_riscv_vcpu_aia_init(struct kvm_vcpu *vcpu);
>   void kvm_riscv_vcpu_aia_deinit(struct kvm_vcpu *vcpu);
>   
>   int kvm_riscv_aia_inject_msi_by_id(struct kvm *kvm, u32 hart_index,
> diff --git a/arch/riscv/kvm/aia_device.c b/arch/riscv/kvm/aia_device.c
> index 806c41931cde..b195a93add1c 100644
> --- a/arch/riscv/kvm/aia_device.c
> +++ b/arch/riscv/kvm/aia_device.c
> @@ -509,12 +509,12 @@ void kvm_riscv_vcpu_aia_reset(struct kvm_vcpu *vcpu)
>   	kvm_riscv_vcpu_aia_imsic_reset(vcpu);
>   }
>   
> -int kvm_riscv_vcpu_aia_init(struct kvm_vcpu *vcpu)
> +void kvm_riscv_vcpu_aia_init(struct kvm_vcpu *vcpu)
>   {
>   	struct kvm_vcpu_aia *vaia = &vcpu->arch.aia_context;
>   
>   	if (!kvm_riscv_aia_available())
> -		return 0;
> +		return;
>   
>   	/*
>   	 * We don't do any memory allocations over here because these
> @@ -526,8 +526,6 @@ int kvm_riscv_vcpu_aia_init(struct kvm_vcpu *vcpu)
>   	/* Initialize default values in AIA vcpu context */
>   	vaia->imsic_addr = KVM_RISCV_AIA_UNDEF_ADDR;
>   	vaia->hart_index = vcpu->vcpu_idx;
> -
> -	return 0;
>   }
>   
>   void kvm_riscv_vcpu_aia_deinit(struct kvm_vcpu *vcpu)
> diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c
> index b467dc1f4c7f..f9fb3dbbe0c3 100644
> --- a/arch/riscv/kvm/vcpu.c
> +++ b/arch/riscv/kvm/vcpu.c
> @@ -159,9 +159,7 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
>   	kvm_riscv_vcpu_pmu_init(vcpu);
>   
>   	/* Setup VCPU AIA */
> -	rc = kvm_riscv_vcpu_aia_init(vcpu);
> -	if (rc)
> -		return rc;
> +	kvm_riscv_vcpu_aia_init(vcpu);
>   
>   	/*
>   	 * Setup SBI extensions

Reviewed-by: Nutty Liu<liujingqi@...xincomputing.com>

Thanks,
Nutty