On 06/11/19 18:07, Sean Christopherson wrote:
> void kvm_get_pfn(kvm_pfn_t pfn)
> {
> - if (!kvm_is_reserved_pfn(pfn))
> + if (!kvm_is_reserved_pfn(pfn) && !WARN_ON(kvm_is_zone_device_pfn(pfn)))
> get_page(pfn_to_page(pfn));
> }
> EXPORT_SYMBOL_GPL(kvm_get_pfn);
Can you call remap_pfn_range with a source address that is ZONE_DEVICE?
If so, you would get a WARN from the kvm_get_pfn call in
hva_to_pfn_remapped.
Paolo
