Commit 9aef71c8 authored by Sean Christopherson's avatar Sean Christopherson
Browse files

KVM: Explicitly mark KVM_GUEST_MEMFD as depending on KVM_GENERIC_MMU_NOTIFIER 



Add KVM_GENERIC_MMU_NOTIFIER as a dependency for selecting KVM_GUEST_MEMFD,
as guest_memfd relies on kvm_mmu_invalidate_{begin,end}(), which are
defined if and only if the generic mmu_notifier implementation is enabled.

The missing dependency is currently benign as s390 is the only KVM arch
that doesn't utilize the generic mmu_notifier infrastructure, and s390
doesn't currently support guest_memfd.

Fixes: a7800aa8 ("KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory")
Reviewed-by: default avatarDavid Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/r/20251003232606.4070510-5-seanjc@google.com


Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
parent 5d3341d6

virt/kvm/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -113,6 +113,7 @@ config KVM_GENERIC_MEMORY_ATTRIBUTES 
       bool



config KVM_GUEST_MEMFD

       depends on KVM_GENERIC_MMU_NOTIFIER

       select XARRAY_MULTI

       bool