[PATCH 02/27] RISC-V: KVM: Fix error code returned for Ssaia ONE_REG

[Anup Patel]

On Tue, Jan 20, 2026 at 1:30 PM Anup Patel <anup.patel at oss.qualcomm.com> wrote:
>
> Return -ENOENT for Ssaia ONE_REG when Ssaia is not enabled
> for a VCPU.
>
> This will make Ssaia ONE_REG error codes consistent with
> other ONE_REG interfaces of KVM RISC-V.
>
> Fixes: 2a88f38cd58d ("RISC-V: KVM: return ENOENT in *_one_reg() when reg is unknown")
> Signed-off-by: Anup Patel <anup.patel at oss.qualcomm.com>

Queued this as fix for Linux-7.0-rcX

Regards,
Anup

> ---
>  arch/riscv/kvm/aia.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/arch/riscv/kvm/aia.c b/arch/riscv/kvm/aia.c
> index dad318185660..31baea9f0589 100644
> --- a/arch/riscv/kvm/aia.c
> +++ b/arch/riscv/kvm/aia.c
> @@ -183,6 +183,8 @@ int kvm_riscv_vcpu_aia_get_csr(struct kvm_vcpu *vcpu,
>  {
>         struct kvm_vcpu_aia_csr *csr = &vcpu->arch.aia_context.guest_csr;
>
> +       if (!riscv_isa_extension_available(vcpu->arch.isa, SSAIA))
> +               return -ENOENT;
>         if (reg_num >= sizeof(struct kvm_riscv_aia_csr) / sizeof(unsigned long))
>                 return -ENOENT;
>
> @@ -199,6 +201,8 @@ int kvm_riscv_vcpu_aia_set_csr(struct kvm_vcpu *vcpu,
>  {
>         struct kvm_vcpu_aia_csr *csr = &vcpu->arch.aia_context.guest_csr;
>
> +       if (!riscv_isa_extension_available(vcpu->arch.isa, SSAIA))
> +               return -ENOENT;
>         if (reg_num >= sizeof(struct kvm_riscv_aia_csr) / sizeof(unsigned long))
>                 return -ENOENT;
>
> --
> 2.43.0
>