On Fri, May 17, 2024 at 8:23 PM Clément Léger <cle...@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 <cle...@rivosinc.com>
LGTM.
Reviewed-by: Anup Patel <a...@brainfault.org>
Acked-by: Anup Patel <a...@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
>
