On Thu, May 30, 2019 at 01:18:34PM +0000, Horia Geanta wrote: > > I guess there are only two options: > -either cache line sharing is avoided OR > -users need to be *aware* they are sharing the cache line and some rules / > assumptions are in place on how to safely work on the data No there is a third option and it's very simple: You must only access the virtual addresses given to you before DMA mapping or after DMA unmapping. Cheers, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
