On 2021/1/27 17:39, Robin Murphy wrote:
On 2021-01-27 07:36, Keqian Zhu wrote:
On 2021/1/27 10:01, Leizhen (ThunderTown) wrote:
Hi,
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.
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. Does the MMU you mention here includes MMU and SMMU? I know that at SMMU side, ATS can prefetch translation.
Keqian
Thanks,.
Keqian
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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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