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

[Binbin Wu]

On 8/8/2026 5:53 AM, Ackerley Tng via B4 Relay wrote:
> From: Sean Christopherson <seanjc@xxxxxxxxxx>
> 
> 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@xxxxxxxxxx>
> Reviewed-by: Fuad Tabba <tabba@xxxxxxxxxx>
> Reviewed-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
> Tested-by: Shivank Garg <shivankg@xxxxxxx>
> Signed-off-by: Ackerley Tng <ackerleytng@xxxxxxxxxx>

Reviewed-by: Binbin Wu <binbin.wu@xxxxxxxxxxxxxxx>