Re: port-arm/57643: aarch64: smmu(4) seems mandatory for some SoC and/or memory configuration

[Rin Okuyama <rokuyama.rk%gmail.com@localhost>]

The following reply was made to PR port-arm/57643; it has been noted by GNATS.

From: Rin Okuyama <rokuyama.rk%gmail.com@localhost>
To: Taylor R Campbell <riastradh%NetBSD.org@localhost>, gnats-bugs%netbsd.org@localhost
Cc: port-arm-maintainer%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
 netbsd-bugs%netbsd.org@localhost
Subject: Re: port-arm/57643: aarch64: smmu(4) seems mandatory for some SoC
 and/or memory configuration
Date: Fri, 6 Oct 2023 22:19:32 +0900

 On 2023/10/04 22:25, Taylor R Campbell wrote:
 >> Date: Wed,  4 Oct 2023 06:55:00 +0000 (UTC)
 >> From: rokuyama.rk%gmail.com@localhost
 >>
 >> (2) Import smmu(4) from OpenBSD. But, don't we need to have MI
 >>      frameworks for IOMMUs?
 > 
 > Isn't that what bus_dma is all about?  What other framework is needed?
 
 API for userland for virtualization?
 
 But, it may be a jump. Yes, we should make it usable from
 bus_dma(9) at the beginning.
 
 Thanks,
 rin