mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-25 10:59:05 +00:00
add6a0cd1c
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. This kind of VM_PFNMAP mapping is not handled by KVM, but follow_pfn and fixup_user_fault together help supporting it. The patch also supports VM_MIXEDMAP vmas where the pfns are not reserved and thus subject to reference counting. Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com> Cc: Andrea Arcangeli <aarcange@redhat.com> Cc: Radim Krčmář <rkrcmar@redhat.com> Tested-by: Neo Jia <cjia@nvidia.com> Reported-by: Kirti Wankhede <kwankhede@nvidia.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> |
||
|---|---|---|
| .. | ||
| kvm | ||
| lib | ||
| Makefile | ||