[PATCH v3 4/4] RISC-V: KVM: Mark the reset callback of FWFT extension always dirties CSR

[Anup Patel]

On Thu, Jul 30, 2026 at 4:55 AM Inochi Amaoto <inochiama at gmail.com> wrote:
>
> As the CSR is only flushed when the csr_dirty is set, always set the
> csr_dirty field in kvm_sbi_ext_fwft_reset() so the CSR change can take
> effect immediately. This unconditional set should be safe as all
> supported FWFT features change the CSR state currently.
>
> Signed-off-by: Inochi Amaoto <inochiama at gmail.com>

LGTM.

Reviewed-by: Anup Patel <anup at brainfault.org>

Thanks,
Anup

> ---
>  arch/riscv/kvm/vcpu_sbi_fwft.c | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/arch/riscv/kvm/vcpu_sbi_fwft.c b/arch/riscv/kvm/vcpu_sbi_fwft.c
> index 56fb59afe02a..2e35e7e12327 100644
> --- a/arch/riscv/kvm/vcpu_sbi_fwft.c
> +++ b/arch/riscv/kvm/vcpu_sbi_fwft.c
> @@ -601,6 +601,8 @@ static void kvm_sbi_ext_fwft_reset(struct kvm_vcpu *vcpu)
>                 if (feature->reset)
>                         feature->reset(vcpu);
>         }
> +
> +       vcpu->arch.csr_dirty = true;
>  }
>
>  static void kvm_sbi_ext_fwft_validate(struct kvm_vcpu *vcpu)
> --
> 2.55.0
>