On 28.08.25 11:39, Roy, Patrick wrote:
Signed-off-by: Patrick Roy <roypat@xxxxxxxxxxxx>
---
Documentation/virt/kvm/api.rst | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index c17a87a0a5ac..b52c14d58798 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst
@@ -6418,6 +6418,11 @@ When the capability KVM_CAP_GUEST_MEMFD_MMAP is supported, the 'flags' field
supports GUEST_MEMFD_FLAG_MMAP. Setting this flag on guest_memfd creation
enables mmap() and faulting of guest_memfd memory to host userspace.
+When the capability KVM_CAP_GMEM_NO_DIRECT_MAP is supported, the 'flags' field
+supports GUEST_MEMFG_FLAG_NO_DIRECT_MAP. Setting this flag makes the guest_memfd
+instance behave similarly to memfd_secret, and unmaps the memory backing it from
+the kernel's address space after allocation.
+
When the KVM MMU performs a PFN lookup to service a guest fault and the backing
guest_memfd has the GUEST_MEMFD_FLAG_MMAP set, then the fault will always be
consumed from guest_memfd, regardless of whether it is a shared or a private
WARNING: Missing commit description - Add an appropriate one
WARNING: From:/Signed-off-by: email name mismatch: 'From: "Roy, Patrick"
<roypat@xxxxxxxxxxxx>' != 'Signed-off-by: Patrick Roy <roypat@xxxxxxxxxxxx>'
--
Cheers
David / dhildenb
