On Thu, Jun 30, 2016 at 03:01:49PM +0200, Paolo Bonzini wrote: > The vGPU folks would like to trap the first access to a BAR by setting > vm_ops on the VMAs produced by mmap-ing a VFIO device. The fault handler > then can use remap_pfn_range to place some non-reserved pages in the VMA.
Hi Paolo, Thanks for the quick patches, I am in the middle of verifying them and will report back asap. Thanks, Neo > > KVM lacks support for this kind of non-linear VM_PFNMAP mapping, and these > patches should fix this. > > Thanks, > > Paolo > > Paolo Bonzini (2): > KVM: MMU: prepare to support mapping of VM_IO and VM_PFNMAP frames > KVM: MMU: try to fix up page faults before giving up > > mm/gup.c | 1 + > virt/kvm/kvm_main.c | 55 > ++++++++++++++++++++++++++++++++++++++++++++++++----- > 2 files changed, 51 insertions(+), 5 deletions(-) > > -- > 1.8.3.1 >
