Re: [PATCH v10 21/41] KVM: guest_memfd: Enable INIT_SHARED on guest_memfd for x86 Coco VMs

On 8/8/2026 5:53 AM, Ackerley Tng via B4 Relay wrote:

From: Sean Christopherson <seanjc@google.com>

Now that guest_memfd supports tracking private vs. shared within gmem
itself, allow userspace to specify INIT_SHARED on a guest_memfd instance
for x86 Confidential Computing (CoCo) VMs, so long as in-place conversion
is enabled, i.e. when it's actually possible for a guest_memfd instance to
contain shared memory.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Fuad Tabba <redacted>
Reviewed-by: Xiaoyao Li <redacted>
Tested-by: Shivank Garg <redacted>
Signed-off-by: Ackerley Tng <redacted>

Reviewed-by: Binbin Wu <redacted>