On Sun, Apr 17, 2022 at 05:30:27PM +0100, Catalin Marinas wrote: > > Do you mean as per Ard's proposal here: > > https://lore.kernel.org/r/CAMj1kXH0x5Va7Wgs+mU1ONDwwsazOBuN4z4ihVzO2uG-n41Kbg@xxxxxxxxxxxxxx > > struct crypto_request { > union { > struct { > ... fields ... > }; > u8 __padding[ARCH_DMA_MINALIGN]; > }; > void __ctx[] __aligned(CRYPTO_MINALIGN); > }; > > If CRYPTO_MINALIGN is lowered to, say, 8 (to be the same as lowest > ARCH_KMALLOC_MINALIGN), the __alignof__(req->__ctx) would be 8. > Functions like crypto_tfm_ctx_alignment() will return 8 when what you > need is 128. We can change those functions to return ARCH_DMA_MINALIGN > instead or always bump cra_alignmask to ARCH_DMA_MINALIGN-1. OK, at this point I think we need to let the code do the talking :) I've seen Ard's patches already and I think I understand what your needs are. So let me whip up some code to show you guys what I think needs to be done. Please bear with me for a few days. Thanks, -- Email: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx> Home Page: http://gondor.apana.org.au/~herbert/ PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt
