On 2021-01-27 07:36, Keqian Zhu wrote:
On 2021/1/27 10:01, Leizhen (ThunderTown) wrote:
On 2021/1/26 18:12, Will Deacon wrote:
On Mon, Jan 25, 2021 at 08:23:40PM +0000, Robin Murphy wrote:
Now we probably will need some degreee of BBML feature awareness for the
sake of SVA if and when we start using it for CPU pagetables, but I still
cannot see any need to consider it in io-pgtable.
Agreed; I don't think this is something that io-pgtable should have to care
about.
Hi,
I have a question here :-).
If the old table is not live, then the break procedure seems unnecessary. Do I
miss something?
The MMU is allowed to prefetch translations at any time, so not
following the proper update procedure could still potentially lead to a
TLB conflict, even if there's no device traffic to worry about disrupting.
Robin.
Thanks,
Keqian
Yes, the SVA works in stall mode, and the failed device access requests are not
discarded.
Let me look for examples. The BBML usage scenario was told by a former
colleague.
Will
.
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