From: Jason Gunthorpe <jgg@ziepe.ca>
To: Pranjal Shrivastava <praan@google.com>
Cc: "Peng Fan (OSS)" <peng.fan@oss.nxp.com>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
Joerg Roedel <joro@8bytes.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>, Joy Zou <joy.zou@nxp.com>,
linux-arm-kernel@lists.infradead.org, iommu@lists.linux.dev,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
Peng Fan <peng.fan@nxp.com>
Subject: Re: [PATCH RFC 2/2] iommu/arm-smmu-v3: Bypass SID0 for NXP i.MX95
Date: Tue, 15 Oct 2024 09:47:23 -0300 [thread overview]
Message-ID: <20241015124723.GI1825128@ziepe.ca> (raw)
In-Reply-To: <Zw4kKDFOcXEC78mb@google.com>
On Tue, Oct 15, 2024 at 08:13:28AM +0000, Pranjal Shrivastava wrote:
> Umm.. this was specific for rmr not a generic thing. I'd suggest to
> avoid meddling with the STEs directly for acheiving bypass. Playing
> with the iommu domain type could be neater. Perhaps, modify the
> ops->def_domain_type to return an appropriate domain?
Yeah, that is the expected way, to force the def_domain_type to
IDENTITY and refuse to attach a PAGING/BLOCKED domain.
If this is a common thing we could have the core code take on more of
the job.
Jason
next prev parent reply other threads:[~2024-10-15 12:47 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-15 3:14 [PATCH RFC 0/2] iommu/arm-smmu-v3: bypass streamid zero on i.MX95 Peng Fan (OSS)
2024-10-15 3:14 ` [PATCH RFC 1/2] dt-bindings: iommu: arm,smmu-v3: introduce nxp,imx95-bypass-sid-zero Peng Fan (OSS)
2024-10-15 3:14 ` [PATCH RFC 2/2] iommu/arm-smmu-v3: Bypass SID0 for NXP i.MX95 Peng Fan (OSS)
2024-10-15 8:13 ` Pranjal Shrivastava
2024-10-15 12:47 ` Jason Gunthorpe [this message]
2024-10-15 15:00 ` Pranjal Shrivastava
2024-10-15 15:07 ` Pranjal Shrivastava
2024-10-15 15:24 ` Jason Gunthorpe
2024-10-15 15:13 ` Robin Murphy
2024-10-15 15:19 ` Pranjal Shrivastava
2024-10-15 15:31 ` Jason Gunthorpe
2024-10-15 15:37 ` Robin Murphy
2024-10-15 16:10 ` Pranjal Shrivastava
2024-10-16 9:02 ` Peng Fan
2024-10-16 9:12 ` Pranjal Shrivastava
2024-10-15 7:45 ` [PATCH RFC 0/2] iommu/arm-smmu-v3: bypass streamid zero on i.MX95 Pranjal Shrivastava
2024-10-15 14:47 ` Robin Murphy
2024-10-16 0:56 ` Peng Fan
2024-10-16 1:15 ` Nicolin Chen
2024-10-16 8:53 ` Peng Fan
2024-10-16 9:06 ` Pranjal Shrivastava
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