Re: [PATCH v5 12/15] KVM: arm64: Derive the VM hardware dirty mode from dirty logging

[Tian Zheng]

On 11/2/2026 11:03 PM, Leonardo Bras wrote:
> On Tue, Sep 29, 2026 at 06:36:52PM +0800, Tian Zheng wrote:
> > Both HAFDBS and HDBSS flip VTCR_EL2.HD at memslot-update time. Two
> > independent toggles allow an intermediate HDBSS-set/HD-clear state,
> > an illegal combination, and need locking against concurrent updates.
> >
> > Replace both with kvm_arch_update_hw_dirty_mode(), a pure function
> > of the static capabilities and the number of logging memslots:
> >
> >    - logging && HDBSS-capable  -> HD|HA|HDBSS
> >    - logging, no HDBSS         -> off
> >    - !logging && HAFDBS-cap.   -> HD|HA
>
> This last one is gone now, so I guess most of this patch has to be
> reworked, right?
>
> Thanks!
> Leo

Hi Leo,

Yes, the last one is no longer needed as we discussed earlier in [1], so
I'll rework this patch.

[1] https://lore.kernel.org/all/attMtUqxNsuPooix@LeoBrasDK/

Thanks,
Tian