From: Janne Grunau <j@jannau.net>
To: Sven Peter <sven@kernel.org>,
Alyssa Rosenzweig <alyssa@rosenzweig.io>,
Neal Gompa <neal@gompa.dev>, Joerg Roedel <joro@8bytes.org>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>
Cc: asahi@lists.linux.dev, linux-arm-kernel@lists.infradead.org,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org,
Janne Grunau <j@jannau.net>, Hector Martin <marcan@marcan.st>
Subject: [PATCH 0/3] iommu: apple-dart: Four level page table support
Date: Thu, 14 Aug 2025 10:40:23 +0200 [thread overview]
Message-ID: <20250814-apple-dart-4levels-v1-0-db2214a78c08@jannau.net> (raw)
The DART instances found in T602x based SoCs (Apple's M2 Pro/Max/Ultra)
indicate an IAS of 42 bit. This results in alloc_io_pgtable_ops()
failing as io-pgtable-dart supports at most 36-bit IAS.
The t8110 DART design supports 4-level page tables. Implement support
for this in io-pgtable-dart and mark DART stream with more than 36-bit
IAS as 4-level page tables.
Signed-off-by: Janne Grunau <j@jannau.net>
---
Hector Martin (3):
iommu: apple-dart: Make the hw register fields u32s
iommu: io-pgtable: Add 4-level page table support
iommu: apple-dart: Add 4-level page table support
drivers/iommu/apple-dart.c | 47 ++++++++-----
drivers/iommu/io-pgtable-dart.c | 143 ++++++++++++++++++++++++----------------
include/linux/io-pgtable.h | 1 +
3 files changed, 118 insertions(+), 73 deletions(-)
---
base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
change-id: 20250811-apple-dart-4levels-8f9ae8ac1347
Best regards,
--
Janne Grunau <j@jannau.net>
next reply other threads:[~2025-08-14 8:44 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-14 8:40 Janne Grunau [this message]
2025-08-14 8:40 ` [PATCH 1/3] iommu: apple-dart: Make the hw register fields u32s Janne Grunau
2025-08-16 13:51 ` Sven Peter
2025-08-14 8:40 ` [PATCH 2/3] iommu: io-pgtable: Add 4-level page table support Janne Grunau
2025-08-16 14:02 ` Sven Peter
2025-08-14 8:40 ` [PATCH 3/3] iommu: apple-dart: " Janne Grunau
2025-08-16 13:50 ` Sven Peter
2025-08-16 14:19 ` Janne Grunau
2025-08-16 15:26 ` Sven Peter
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