On (21/10/20 00:32), Sergey Senozhatsky wrote:
> static int kvm_vm_ioctl_get_clock(struct kvm *kvm, void __user *argp)
> {
> struct kvm_clock_data data;
> @@ -6169,6 +6189,15 @@ long kvm_arch_vm_ioctl(struct file *filp,
> case KVM_X86_SET_MSR_FILTER:
> r = kvm_vm_ioctl_set_msr_filter(kvm, argp);
> break;
> + case KVM_SET_MMU_PREFETCH: {
> + u64 val;
> +
> + r = -EFAULT;
> + if (copy_from_user(&val, argp, sizeof(val)))
> + goto out;
> + r = kvm_arch_mmu_pte_prefetch(kvm, val);
> + break;
> + }
A side question: is there any value in turning this into a per-VCPU ioctl?
So that, say, on heterogeneous systems big cores can prefetch more than
little cores, for instance.
