Re: 答复: KVM guest sometimes failed to boot because of kernel stack overflow if KPTI is enabled on a hisilicon ARM64 platform.

[Mark Rutland]

On Thu, Jun 28, 2018 at 04:08:24PM +0000, Wangxuefeng (E) wrote:
> Hi, mark
>      Your means is that DMB must  make sure the completion of prior load/store
> or CMO  and make sure the data is visible to all obsevers (no matter device or
> cacheable).   DMB not only keep order?

Not quite -- DMB does not guarantee completion.

However, DMB must guarantee that loads/stores and CMOs are ordered on
the bus, all the way to the PoC.

Thanks,
Mark.