From: Jason Gunthorpe <jgg@ziepe.ca>
To: Robin Murphy <robin.murphy@arm.com>
Cc: Peng Fan <peng.fan@nxp.com>,
"eric.auger@redhat.com" <eric.auger@redhat.com>,
"jean-philippe.brucker@arm.com" <jean-philippe.brucker@arm.com>,
"will@kernel.org" <will@kernel.org>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: arm-smmu-v3 sharing SID
Date: Thu, 18 May 2023 09:36:53 -0300 [thread overview]
Message-ID: <ZGYb5Y1eAgvt/TdY@ziepe.ca> (raw)
In-Reply-To: <359b01bc-e87a-9a50-c971-681e89985491@arm.com>
On Thu, May 18, 2023 at 12:33:25PM +0100, Robin Murphy wrote:
> I'm fairly confident in reasoning about this for basic .attach_dev purposes,
> since I did implement the equivalent for SMMUv2, but I'm not sure I even
> want to think about what it would mean for SVA, PASIDs and nesting...
IIRC we've already taken the approach elsewhere to block PASID if the
group is not singleton.
Jason
WARNING: multiple messages have this Message-ID (diff)
From: Jason Gunthorpe <jgg@ziepe.ca>
To: Robin Murphy <robin.murphy@arm.com>
Cc: Peng Fan <peng.fan@nxp.com>,
"eric.auger@redhat.com" <eric.auger@redhat.com>,
"jean-philippe.brucker@arm.com" <jean-philippe.brucker@arm.com>,
"will@kernel.org" <will@kernel.org>,
"iommu@lists.linux.dev" <iommu@lists.linux.dev>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>
Subject: Re: arm-smmu-v3 sharing SID
Date: Thu, 18 May 2023 09:36:53 -0300 [thread overview]
Message-ID: <ZGYb5Y1eAgvt/TdY@ziepe.ca> (raw)
In-Reply-To: <359b01bc-e87a-9a50-c971-681e89985491@arm.com>
On Thu, May 18, 2023 at 12:33:25PM +0100, Robin Murphy wrote:
> I'm fairly confident in reasoning about this for basic .attach_dev purposes,
> since I did implement the equivalent for SMMUv2, but I'm not sure I even
> want to think about what it would mean for SVA, PASIDs and nesting...
IIRC we've already taken the approach elsewhere to block PASID if the
group is not singleton.
Jason
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next prev parent reply other threads:[~2023-05-18 12:36 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-18 10:46 arm-smmu-v3 sharing SID Peng Fan
2023-05-18 10:46 ` Peng Fan
2023-05-18 11:33 ` Robin Murphy
2023-05-18 11:33 ` Robin Murphy
2023-05-18 11:44 ` Peng Fan
2023-05-18 11:44 ` Peng Fan
2023-05-18 13:04 ` Jean-Philippe Brucker
2023-05-18 13:04 ` Jean-Philippe Brucker
2023-05-19 2:49 ` Baolu Lu
2023-05-19 2:49 ` Baolu Lu
2026-09-22 15:09 ` Jason Gunthorpe
2023-05-18 12:36 ` Jason Gunthorpe [this message]
2023-05-18 12:36 ` Jason Gunthorpe
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