[PATCH v2 04/13] KVM: Explicitly mark KVM_GUEST_MEMFD as depending on KVM_GENERIC_MMU_NOTIFIER

Sean Christopherson
2025-10-03T23:26:20Z

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: a7800aa80ea4 ("KVM: Add KVM_CREATE_GUEST_MEMFD ioctl() for guest-specific backing memory")
Signed-off-by: Sean Christopherson <seanjc@google.com>
---
virt/kvm/Kconfig | 1 +
1 file changed, 1 insertion(+)

diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index 1b7d5be0b6c4..a01cc5743137 100644
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -113,6 +113,7 @@ config KVM_GENERIC_MEMORY_ATTRIBUTES
bool

config KVM_GUEST_MEMFD
+ depends on KVM_GENERIC_MMU_NOTIFIER
select XARRAY_MULTI
bool

--
2.51.0.618.g983fd99d29-goog