On 30.04.25 18:56, Fuad Tabba wrote:
Add support for mmap() and fault() for guest_memfd backed memory in the host for VMs that support in-place conversion between shared and private. To that end, this patch adds the ability to check whether the VM type supports in-place conversion, and only allows mapping its memory if that's the case. This patch introduces the configuration option KVM_GMEM_SHARED_MEM, which enables support for in-place shared memory. It also introduces the KVM capability KVM_CAP_GMEM_SHARED_MEM, which indicates that the host can create VMs that support shared memory. Supporting shared memory implies that memory can be mapped when shared with the host.
I think you should clarify here that it's not about "supports in-place conversion" in the context of this series.
It's about mapping shared pages only; initially, we'll introduce the option to only have shared memory in guest memfd, and later we'll introduce the option for in-place conversion.
-- Cheers, David / dhildenb
