[PATCH v5 04/16] RISC-V: KVM: Allow Zimop extension for Guest/VM

[Anup Patel]

On Fri, May 17, 2024 at 8:23 PM Clément Léger <cleger at rivosinc.com> wrote:
>
> Extend the KVM ISA extension ONE_REG interface to allow KVM user space
> to detect and enable Zimop extension for Guest/VM.
>
> Signed-off-by: Clément Léger <cleger at rivosinc.com>

LGTM.

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

Regards,
Anup

> ---
>  arch/riscv/include/uapi/asm/kvm.h | 1 +
>  arch/riscv/kvm/vcpu_onereg.c      | 2 ++
>  2 files changed, 3 insertions(+)
>
> diff --git a/arch/riscv/include/uapi/asm/kvm.h b/arch/riscv/include/uapi/asm/kvm.h
> index b1c503c2959c..35a12aa1953e 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -167,6 +167,7 @@ enum KVM_RISCV_ISA_EXT_ID {
>         KVM_RISCV_ISA_EXT_ZFA,
>         KVM_RISCV_ISA_EXT_ZTSO,
>         KVM_RISCV_ISA_EXT_ZACAS,
> +       KVM_RISCV_ISA_EXT_ZIMOP,
>         KVM_RISCV_ISA_EXT_MAX,
>  };
>
> diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
> index f4a6124d25c9..c6ee763422f2 100644
> --- a/arch/riscv/kvm/vcpu_onereg.c
> +++ b/arch/riscv/kvm/vcpu_onereg.c
> @@ -60,6 +60,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
>         KVM_ISA_EXT_ARR(ZIHINTNTL),
>         KVM_ISA_EXT_ARR(ZIHINTPAUSE),
>         KVM_ISA_EXT_ARR(ZIHPM),
> +       KVM_ISA_EXT_ARR(ZIMOP),
>         KVM_ISA_EXT_ARR(ZKND),
>         KVM_ISA_EXT_ARR(ZKNE),
>         KVM_ISA_EXT_ARR(ZKNH),
> @@ -137,6 +138,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
>         case KVM_RISCV_ISA_EXT_ZIHINTNTL:
>         case KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
>         case KVM_RISCV_ISA_EXT_ZIHPM:
> +       case KVM_RISCV_ISA_EXT_ZIMOP:
>         case KVM_RISCV_ISA_EXT_ZKND:
>         case KVM_RISCV_ISA_EXT_ZKNE:
>         case KVM_RISCV_ISA_EXT_ZKNH:
> --
> 2.43.0
>