On 13.05.25 18:34, Fuad Tabba wrote:
Add arm64 support for handling guest page faults on guest_memfd
backed memslots.
For now, the fault granule is restricted to PAGE_SIZE.
Signed-off-by: Fuad Tabba <tabba@xxxxxxxxxx>
---
[...]
+ if (!is_gmem) {
Should we add a comment somewhere, stating that we don't support VMs
with private memory, so if we have a gmem, all faults are routed through
that?
+ mmap_read_lock(current->mm);
+ vma = vma_lookup(current->mm, hva);
+ if (unlikely(!vma)) {
+ kvm_err("Failed to find VMA for hva 0x%lx\n", hva);
+ mmap_read_unlock(current->mm);
+ return -EFAULT;
+ }
+
+ vfio_allow_any_uc = vma->vm_flags & VM_ALLOW_ANY_UNCACHED;
+ mte_allowed = kvm_vma_mte_allowed(vma);
--
Cheers,
David / dhildenb
