On Wed, Jun 27, 2018 at 02:22:03PM +0100, Wei Xu wrote: > On 2018/6/26 18:47, Will Deacon wrote: > > If you look at the __idmap_kpti_put_pgtable_ent_ng asm macro, can you try > > replacing: > > > > dc civac, cur_\()\type\()p > > > > with: > > > > dc ivac, cur_\()\type\()p > > > > please? Only do this for the guest kernel, not the host. KVM will upgrade > > the clean to a clean+invalidate, so it's interesting to see if this has > > an effect on the behaviour. > > Only changed the guest kernel, the guest still failed to boot and the log > is same with the last mail. > > But if I changed to cvac as below for the guest, it is kind of stable. > dc cvac, cur_\()\type\()p > > I have synced with our SoC guys about this and hope we can find the reason. > Do you have any more suggestion?
Unfortunately, not. It looks like somehow clean+invalidate is behaving just as an invalidate, and we're corrupting the page table as a result. Hopefully the SoC guys will figure it out. Will
