Re: [PATCH 2/5] RISC-V: KVM: Allow Ztso extension for Guest/VM

Andrew Jones
2024-02-28T13:05:40Z

On Wed, Feb 14, 2024 at 06:07:54PM +0530, Anup Patel wrote:
> We extend the KVM ISA extension ONE_REG interface to allow KVM
> user space to detect and enable Ztso extension for Guest/VM.
>
> Signed-off-by: Anup Patel <apatel@ventanamicro.com>
> ---
> 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 7499e88a947c..f8aa9f2ace95 100644
> --- a/arch/riscv/include/uapi/asm/kvm.h
> +++ b/arch/riscv/include/uapi/asm/kvm.h
> @@ -166,6 +166,7 @@ enum KVM_RISCV_ISA_EXT_ID {
> KVM_RISCV_ISA_EXT_ZVFH,
> KVM_RISCV_ISA_EXT_ZVFHMIN,
> KVM_RISCV_ISA_EXT_ZFA,
> + KVM_RISCV_ISA_EXT_ZTSO,
> KVM_RISCV_ISA_EXT_MAX,
> };
>
> diff --git a/arch/riscv/kvm/vcpu_onereg.c b/arch/riscv/kvm/vcpu_onereg.c
> index 5f7355e96008..38f5cf286087 100644
> --- a/arch/riscv/kvm/vcpu_onereg.c
> +++ b/arch/riscv/kvm/vcpu_onereg.c
> @@ -66,6 +66,7 @@ static const unsigned long kvm_isa_ext_arr[] = {
> KVM_ISA_EXT_ARR(ZKSED),
> KVM_ISA_EXT_ARR(ZKSH),
> KVM_ISA_EXT_ARR(ZKT),
> + KVM_ISA_EXT_ARR(ZTSO),
> KVM_ISA_EXT_ARR(ZVBB),
> KVM_ISA_EXT_ARR(ZVBC),
> KVM_ISA_EXT_ARR(ZVFH),
> @@ -141,6 +142,7 @@ static bool kvm_riscv_vcpu_isa_disable_allowed(unsigned long ext)
> case KVM_RISCV_ISA_EXT_ZKSED:
> case KVM_RISCV_ISA_EXT_ZKSH:
> case KVM_RISCV_ISA_EXT_ZKT:
> + case KVM_RISCV_ISA_EXT_ZTSO:
> case KVM_RISCV_ISA_EXT_ZVBB:
> case KVM_RISCV_ISA_EXT_ZVBC:
> case KVM_RISCV_ISA_EXT_ZVFH:
> --
> 2.34.1
>

Reviewed-by: Andrew Jones <ajones@ventanamicro.com>