[PATCH] RISC-V: KVM: Allow Svnapot extension for Guest/VM

[Anup Patel]

On Mon, Jun 12, 2023 at 4:41 PM Anup Patel <apatel at ventanamicro.com> wrote:
>
> We extend the KVM ISA extension ONE_REG interface to allow KVM
> user space to detect and enable Svnapot extension for Guest/VM.
>
> Signed-off-by: Anup Patel <apatel at ventanamicro.com>
> Reviewed-by: Andrew Jones <ajones at ventanamicro.com>

Queued this patch for Linux-6.5

Thanks,
Anup

> ---
>  arch/riscv/include/uapi/asm/kvm.h | 1 +
>  arch/riscv/kvm/vcpu.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 61d7fecc4899..a1ca18408bbd 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -122,6 +122,7 @@ enum KVM_RISCV_ISA_EXT_ID {
>         KVM_RISCV_ISA_EXT_ZICBOZ,
>         KVM_RISCV_ISA_EXT_ZBB,
>         KVM_RISCV_ISA_EXT_SSAIA,
> +       KVM_RISCV_ISA_EXT_SVNAPOT,
>         KVM_RISCV_ISA_EXT_MAX,
>  };
>
> diff --git a/arch/riscv/kvm/vcpu.c b/arch/riscv/kvm/vcpu.c
> index 2db62c6c0d3e..7b355900f235 100644
> --- a/arch/riscv/kvm/vcpu.c
> +++ b/arch/riscv/kvm/vcpu.c
> @@ -61,6 +61,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
>         KVM_ISA_EXT_ARR(SSAIA),
>         KVM_ISA_EXT_ARR(SSTC),
>         KVM_ISA_EXT_ARR(SVINVAL),
> +       KVM_ISA_EXT_ARR(SVNAPOT),
>         KVM_ISA_EXT_ARR(SVPBMT),
>         KVM_ISA_EXT_ARR(ZBB),
>         KVM_ISA_EXT_ARR(ZIHINTPAUSE),
> @@ -102,6 +103,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
>         case KVM_RISCV_ISA_EXT_SSAIA:
>         case KVM_RISCV_ISA_EXT_SSTC:
>         case KVM_RISCV_ISA_EXT_SVINVAL:
> +       case KVM_RISCV_ISA_EXT_SVNAPOT:
>         case KVM_RISCV_ISA_EXT_ZIHINTPAUSE:
>         case KVM_RISCV_ISA_EXT_ZBB:
>                 return false;
> --
> 2.34.1
>
>
> --
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