[PATCH v6 3/8] RISC-V: KVM: Allow Zicfiss/Zicfilp extensions for Guest/VM

[Anup Patel]

On Mon, Jul 13, 2026 at 6:33 AM Inochi Amaoto <inochiama at gmail.com> wrote:
>
> Extend the KVM ISA extension array to allow KVM userspace to
> detect and enable Zicfiss/Zicfilp extensions for Guest/VM.
>
> Assisted-by: YuanSheng:claude-4.7-opus
> Co-developed-by: Quan Zhou <zhouquan at iscas.ac.cn>
> Signed-off-by: Quan Zhou <zhouquan at iscas.ac.cn>
> Signed-off-by: Inochi Amaoto <inochiama at gmail.com>

LGTM.

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

Thanks,
Anup

> ---
>  arch/riscv/include/uapi/asm/kvm.h | 2 ++
>  arch/riscv/kvm/isa.c              | 2 ++
>  2 files changed, 4 insertions(+)
>
> diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
> index 7bbea8812d92..a27de850fa4c 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -199,6 +199,8 @@ enum KVM_RISCV_ISA_EXT_ID {
>         KVM_RISCV_ISA_EXT_ZCLSD,
>         KVM_RISCV_ISA_EXT_ZILSD,
>         KVM_RISCV_ISA_EXT_ZALASR,
> +       KVM_RISCV_ISA_EXT_ZICFILP,
> +       KVM_RISCV_ISA_EXT_ZICFISS,
>         KVM_RISCV_ISA_EXT_MAX,
>  };
>
> diff --git a/arch/riscv/kvm/isa.c b/arch/riscv/kvm/isa.c
> index 1132d909cc25..9852a91fdecc 100644
> --- a/arch/riscv/kvm/isa.c
> +++ b/arch/riscv/kvm/isa.c
> @@ -65,6 +65,8 @@ static const unsigned long kvm_isa_ext_arr[] = {
>         KVM_ISA_EXT_ARR(ZICBOP),
>         KVM_ISA_EXT_ARR(ZICBOZ),
>         KVM_ISA_EXT_ARR(ZICCRSE),
> +       KVM_ISA_EXT_ARR(ZICFILP),
> +       KVM_ISA_EXT_ARR(ZICFISS),
>         KVM_ISA_EXT_ARR(ZICNTR),
>         KVM_ISA_EXT_ARR(ZICOND),
>         KVM_ISA_EXT_ARR(ZICSR),
> --
> 2.55.0
>