Re: [PATCH] KVM: x86/xen: Convert evtchn_ports from IDR to XArray

[David Woodhouse]

On 31 August 2026 06:59:50 BST, "Furkan Çalışkan" <frn1furkan10@xxxxxxxxx> wrote:
>
>
>On 7/7/26 12:16, David Woodhouse wrote:
>> On Mon, 2026-07-06 at 11:13 +0300, Furkan Caliskan wrote:
>>> IDR is deprecated in favor of XArray: see
>>> Documentation/core-api/idr.rst. Convert evtchn_ports accordingly.
>>>
>>> kvm_xen_eventfd_assign()'s single-slot idr_alloc() becomes
>>> xa_insert(), since it was really an insert-at-index, not an
>>> allocation: -EBUSY replaces -ENOSPC, still mapped to -EEXIST.
>>>
>>> kvm_xen_hcall_evtchn_send() drops its explicit rcu_read_lock(),
>>> since xa_load() takes its own RCU read-side section internally.
>>> evtchnfd's lifetime is still guaranteed by kvm->srcu.
>>>
>>> xen_lock is left in place: it protects state beyond the map itself.
>>>
>>> Signed-off-by: Furkan Caliskan <frn1furkan10@xxxxxxxxx>
>> 
>> Reviewed-by: David Woodhouse <dwmw@xxxxxxxxxxxx>
>> 
>> Thanks.
>
>Ping?

I have a pile of Xen cleanups outstanding; I'll tack it on the end of that series so it doesn't get lost. Thanks.