Re: [PATCH] Add direct memory access synchronize extension
The SBI_DMA_SYNC_NONE if succeeds tells supervisor-mode that target memory regions is valid and DMA sync calls with other directions will go through.
In this first draft, I tried to keep various DMA directions in sync with DMA directions defined by Linux DMA mappings . I am fine to drop SBI_DMA_SYNC_NONE as well.
From: tech-unixplatformspec@... <tech-unixplatformspec@...> On Behalf Of Jonathan Behrens
Sent: 03 June 2021 21:14
To: Bin Meng <bmeng.cn@...>
Cc: Anup Patel <Anup.Patel@...>; tech-unixplatformspec@...; Atish Patra <Atish.Patra@...>
Subject: Re: [RISC-V] [tech-unixplatformspec] [PATCH] Add direct memory access synchronize extension
Could you clarify what SBI_DMA_SYNC_NONE does and how it would help with debugging?
On Thu, Jun 3, 2021 at 11:32 AM Bin Meng via lists.riscv.org <bmeng.cn=gmail.com@...> wrote: