From: Janne Grunau <j@jannau.net>
To: Sven Peter <sven@svenpeter.dev>
Cc: devicetree@vger.kernel.org, Will Deacon <will@kernel.org>,
Hector Martin <marcan@marcan.st>,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
Rob Herring <robh+dt@kernel.org>,
linux-arm-kernel@lists.infradead.org,
Robin Murphy <robin.murphy@arm.com>,
Alyssa Rosenzweig <alyssa@rosenzweig.io>
Subject: Re: [PATCH 0/4] iommu: M1 Pro/Max DART support
Date: Tue, 30 Nov 2021 21:56:31 +0100 [thread overview]
Message-ID: <20211130205631.GD28130@jannau.net> (raw)
In-Reply-To: <20211117211509.28066-1-sven@svenpeter.dev>
Hej,
On 2021-11-17 22:15:05 +0100, Sven Peter wrote:
>
> This is a fairly brief series to add support for the DARTs present in the
> M1 Pro/Max. They have two differences that make them incompatible with
> those in the M1:
>
> - the physical addresses are shifted left by 4 bits and and have 2 more
> bits inside the PTE entries
> - the subpage protection feature is now mandatory. For Linux we can
> just configure it to always allow access to the entire page.
>
> Note that this needs a fix to the core pagetable code. Hector already
> sent a first version separately to the mailing list since the problem
> is (at least in theory) also present on other SoCs using the LPAE format
> with a large physical address space [1].
>
> Sven
>
> [1] https://lore.kernel.org/linux-iommu/a2b45243-7e0a-a2ac-4e14-5256a3e7abb4@arm.com/T/#t
>
> Sven Peter (4):
> dt-bindings: iommu: dart: add t6000 compatible
> iommu/io-pgtable: Add DART subpage protection support
> iommu/io-pgtable: Add DART PTE support for t6000
> iommu: dart: Support t6000 variant
>
> .../devicetree/bindings/iommu/apple,dart.yaml | 4 +-
> drivers/iommu/apple-dart.c | 19 ++++++++-
> drivers/iommu/io-pgtable-arm.c | 40 ++++++++++++++++++-
> include/linux/io-pgtable.h | 2 +
> 4 files changed, 61 insertions(+), 4 deletions(-)
Whole series tested on M1 Max. Feel free to add
Tested-by: Janne Grunau <j@jannau.net>
best
Janne
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
WARNING: multiple messages have this Message-ID (diff)
From: Janne Grunau <j@jannau.net>
To: Sven Peter <sven@svenpeter.dev>
Cc: iommu@lists.linux-foundation.org, Joerg Roedel <joro@8bytes.org>,
Will Deacon <will@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Hector Martin <marcan@marcan.st>,
Robin Murphy <robin.murphy@arm.com>,
Alyssa Rosenzweig <alyssa@rosenzweig.io>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 0/4] iommu: M1 Pro/Max DART support
Date: Tue, 30 Nov 2021 21:56:31 +0100 [thread overview]
Message-ID: <20211130205631.GD28130@jannau.net> (raw)
In-Reply-To: <20211117211509.28066-1-sven@svenpeter.dev>
Hej,
On 2021-11-17 22:15:05 +0100, Sven Peter wrote:
>
> This is a fairly brief series to add support for the DARTs present in the
> M1 Pro/Max. They have two differences that make them incompatible with
> those in the M1:
>
> - the physical addresses are shifted left by 4 bits and and have 2 more
> bits inside the PTE entries
> - the subpage protection feature is now mandatory. For Linux we can
> just configure it to always allow access to the entire page.
>
> Note that this needs a fix to the core pagetable code. Hector already
> sent a first version separately to the mailing list since the problem
> is (at least in theory) also present on other SoCs using the LPAE format
> with a large physical address space [1].
>
> Sven
>
> [1] https://lore.kernel.org/linux-iommu/a2b45243-7e0a-a2ac-4e14-5256a3e7abb4@arm.com/T/#t
>
> Sven Peter (4):
> dt-bindings: iommu: dart: add t6000 compatible
> iommu/io-pgtable: Add DART subpage protection support
> iommu/io-pgtable: Add DART PTE support for t6000
> iommu: dart: Support t6000 variant
>
> .../devicetree/bindings/iommu/apple,dart.yaml | 4 +-
> drivers/iommu/apple-dart.c | 19 ++++++++-
> drivers/iommu/io-pgtable-arm.c | 40 ++++++++++++++++++-
> include/linux/io-pgtable.h | 2 +
> 4 files changed, 61 insertions(+), 4 deletions(-)
Whole series tested on M1 Max. Feel free to add
Tested-by: Janne Grunau <j@jannau.net>
best
Janne
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
WARNING: multiple messages have this Message-ID (diff)
From: Janne Grunau <j@jannau.net>
To: Sven Peter <sven@svenpeter.dev>
Cc: iommu@lists.linux-foundation.org, Joerg Roedel <joro@8bytes.org>,
Will Deacon <will@kernel.org>, Rob Herring <robh+dt@kernel.org>,
Hector Martin <marcan@marcan.st>,
Robin Murphy <robin.murphy@arm.com>,
Alyssa Rosenzweig <alyssa@rosenzweig.io>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH 0/4] iommu: M1 Pro/Max DART support
Date: Tue, 30 Nov 2021 21:56:31 +0100 [thread overview]
Message-ID: <20211130205631.GD28130@jannau.net> (raw)
In-Reply-To: <20211117211509.28066-1-sven@svenpeter.dev>
Hej,
On 2021-11-17 22:15:05 +0100, Sven Peter wrote:
>
> This is a fairly brief series to add support for the DARTs present in the
> M1 Pro/Max. They have two differences that make them incompatible with
> those in the M1:
>
> - the physical addresses are shifted left by 4 bits and and have 2 more
> bits inside the PTE entries
> - the subpage protection feature is now mandatory. For Linux we can
> just configure it to always allow access to the entire page.
>
> Note that this needs a fix to the core pagetable code. Hector already
> sent a first version separately to the mailing list since the problem
> is (at least in theory) also present on other SoCs using the LPAE format
> with a large physical address space [1].
>
> Sven
>
> [1] https://lore.kernel.org/linux-iommu/a2b45243-7e0a-a2ac-4e14-5256a3e7abb4@arm.com/T/#t
>
> Sven Peter (4):
> dt-bindings: iommu: dart: add t6000 compatible
> iommu/io-pgtable: Add DART subpage protection support
> iommu/io-pgtable: Add DART PTE support for t6000
> iommu: dart: Support t6000 variant
>
> .../devicetree/bindings/iommu/apple,dart.yaml | 4 +-
> drivers/iommu/apple-dart.c | 19 ++++++++-
> drivers/iommu/io-pgtable-arm.c | 40 ++++++++++++++++++-
> include/linux/io-pgtable.h | 2 +
> 4 files changed, 61 insertions(+), 4 deletions(-)
Whole series tested on M1 Max. Feel free to add
Tested-by: Janne Grunau <j@jannau.net>
best
Janne
next prev parent reply other threads:[~2021-11-30 21:57 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-17 21:15 [PATCH 0/4] iommu: M1 Pro/Max DART support Sven Peter via iommu
2021-11-17 21:15 ` Sven Peter
2021-11-17 21:15 ` Sven Peter
2021-11-17 21:15 ` [PATCH 1/4] dt-bindings: iommu: dart: add t6000 compatible Sven Peter via iommu
2021-11-17 21:15 ` Sven Peter
2021-11-17 21:15 ` Sven Peter
2021-11-29 22:50 ` Rob Herring
2021-11-29 22:50 ` Rob Herring
2021-11-29 22:50 ` Rob Herring
2021-11-17 21:15 ` [PATCH 2/4] iommu/io-pgtable: Add DART subpage protection support Sven Peter via iommu
2021-11-17 21:15 ` Sven Peter
2021-11-17 21:15 ` Sven Peter
2021-11-17 21:15 ` [PATCH 3/4] iommu/io-pgtable: Add DART PTE support for t6000 Sven Peter via iommu
2021-11-17 21:15 ` Sven Peter
2021-11-17 21:15 ` Sven Peter
2021-11-17 21:15 ` [PATCH 4/4] iommu: dart: Support t6000 variant Sven Peter via iommu
2021-11-17 21:15 ` Sven Peter
2021-11-17 21:15 ` Sven Peter
2021-11-30 20:56 ` Janne Grunau [this message]
2021-11-30 20:56 ` [PATCH 0/4] iommu: M1 Pro/Max DART support Janne Grunau
2021-11-30 20:56 ` Janne Grunau
2021-12-06 12:07 ` Joerg Roedel
2021-12-06 12:07 ` Joerg Roedel
2021-12-06 12:07 ` Joerg Roedel
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