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    SubjectRe: [PATCH v13 10/30] LoongArch: KVM: Implement vcpu ENABLE_CAP ioctl interface
    Reviewed-by: Bibo Mao <maobibo@loongson.cn>

    Regards
    Bibo, Mao

    在 2023/6/9 17:08, Tianrui Zhao 写道:
    > Implement LoongArch vcpu KVM_ENABLE_CAP ioctl interface.
    >
    > 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 b0cce413762d..da97b77da8eb 100644
    > --- a/arch/loongarch/kvm/vcpu.c
    > +++ b/arch/loongarch/kvm/vcpu.c
    > @@ -186,6 +186,16 @@ 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)
    > {
    > @@ -209,6 +219,15 @@ 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;

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