linux-kernel - Re: [PATCH 01/11] RISC-V: drivers/iommu: Add RISC-V IOMMU

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Message-ID: <20230720-charter-lustrous-061e7550ce7c@spud>
Date:   Thu, 20 Jul 2023 20:27:05 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Tomasz Jeznach <tjeznach@...osinc.com>
Cc:     Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>,
        Robin Murphy <robin.murphy@....com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Anup Patel <apatel@...tanamicro.com>,
        Albert Ou <aou@...s.berkeley.edu>, linux@...osinc.com,
        linux-kernel@...r.kernel.org, Sebastien Boeuf <seb@...osinc.com>,
        iommu@...ts.linux.dev, Palmer Dabbelt <palmer@...belt.com>,
        Nick Kossifidis <mick@....forth.gr>,
        linux-riscv@...ts.infradead.org
Subject: Re: [PATCH 01/11] RISC-V: drivers/iommu: Add RISC-V IOMMU - Ziommu
 support.

On Wed, Jul 19, 2023 at 02:43:51PM -0700, Tomasz Jeznach wrote:
> On Wed, Jul 19, 2023 at 1:50 PM Conor Dooley <conor@...nel.org> wrote:

> > Anyway, what I wanted to ask was whether it was valid to use the IOMMU
> > in a system if Ziommu is not present in whatever the ISA extension
> > communication mechanism is? Eg, riscv,isa or the ISA string property in
> > the ACPI tables.
> >
> 
> Yes, this has been pointed out to me already. As far as I can recall,
> there was a discussion
> at some point to introduce those as Ziommu extensions, later agreeing
> not to call IOMMU
> using ISA string conventions.  Will remove remaining occurrences of
> Ziommu from the series.

Right, thanks for clearing that up. I got a bit confused :)

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