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    Subject[PATCH v19 10/30] LoongArch: KVM: Implement vcpu ENABLE_CAP ioctl interface
    Date
    Implement LoongArch vcpu KVM_ENABLE_CAP ioctl interface.

    Reviewed-by: Bibo Mao <maobibo@loongson.cn>
    Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
    ---
    arch/loongarch/kvm/vcpu.c | 19 +++++++++++++++++++
    1 file changed, 19 insertions(+)

    diff --git a/arch/loongarch/kvm/vcpu.c b/arch/loongarch/kvm/vcpu.c
    index f17422a9429d..be0c17a433fc 100644
    --- a/arch/loongarch/kvm/vcpu.c
    +++ b/arch/loongarch/kvm/vcpu.c
    @@ -187,6 +187,16 @@ int kvm_arch_vcpu_ioctl_set_regs(struct kvm_vcpu *vcpu, struct kvm_regs *regs)
    return 0;
    }

    +static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
    + struct kvm_enable_cap *cap)
    +{
    + /*
    + * FPU is enable by default, do not support any other caps,
    + * and later we will support such as LSX cap.
    + */
    + return -EINVAL;
    +}
    +
    long kvm_arch_vcpu_ioctl(struct file *filp,
    unsigned int ioctl, unsigned long arg)
    {
    @@ -210,6 +220,15 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
    r = _kvm_get_reg(vcpu, &reg);
    break;
    }
    + case KVM_ENABLE_CAP: {
    + struct kvm_enable_cap cap;
    +
    + r = -EFAULT;
    + if (copy_from_user(&cap, argp, sizeof(cap)))
    + break;
    + r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
    + break;
    + }
    default:
    r = -ENOIOCTLCMD;
    break;
    --
    2.39.1
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