Hi Will, On 2018/6/27 14:28, Will Deacon wrote: > 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.
Thanks anyway! I will update here if any news. Best Regards, Wei > > Will > > . >
