linux-kernel - [PATCH v12 0/2] iommu/mediatek: TTBR up to 35bit support

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Date:   Thu, 30 Jun 2022 17:29:24 +0800
From:   <yf.wang@...iatek.com>
To:     Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
        "Joerg Roedel" <joro@...tes.org>, Yong Wu <Yong.Wu@...iatek.com>,
        Miles Chen <miles.chen@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     <wsd_upstream@...iatek.com>, Libo Kang <Libo.Kang@...iatek.com>,
        Ning Li <ning.li@...iatek.com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <iommu@...ts.linux-foundation.org>, <linux-kernel@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>
Subject: [PATCH v12 0/2] iommu/mediatek: TTBR up to 35bit support

This patchset adds MediaTek TTBR up to 35bit support for single normal zone.

Changes in v12:
- Update [PATCH 1/2]: remove GENMASK(31, 7)
- Update [PATCH 2/2]: remove MMU_PT_ADDR_MASK definition.

Changes in v11:
https://lore.kernel.org/linux-mediatek/20220630062508.23512-1-yf.wang@mediatek.com/
- According to Yong's suggestion in [PATCH v10] to update patch
  - [PATCH 1/2]: Because keep ttbr u32, so the special logic of encoded PA
    bits[34:32] to ttbr lower bits will apply to all the MediaTek cases,
    not only for the quirk IO_PGTABLE_QUIRK_ARM_MTK_TTBR_EXT, so remove
    quirk check.
  - [PATCH 2/2]: Because no need calculate the special ttbr, so remove ttbr
    from mtk_iommu_domain and remove MMU_PT_ADDR_MASK calculate.

Changes in v10:
https://lore.kernel.org/linux-mediatek/20220616120713.12728-1-yf.wang@mediatek.com/
- According to Robin's suggestion in [PATCH v9] to update patch
  - Recovery ttbr to u32, encoded PA bits[34:32] to ttbr lower bits.
  - Remove PATCH: Rename MTK_IOMMU_TLB_ADDR to MTK_IOMMU_ADDR.

Changes in v9:
https://lore.kernel.org/linux-mediatek/20220615161224.6923-1-yf.wang@mediatek.com/
- According to Will's suggestion in [PATCH v8 1/3] update [PATCH 1/3]
  - Rename function to_iopte_mtk to to_mtk_iopte.
  - Modify gfp_l1 and slab_flag and add comment explaining.
  - Add checking that the address is within 35 bits use cfg->oas.
  - PATCH 1/3 & PATCH 2/3 no change.

Changes in v8:
https://lore.kernel.org/linux-mediatek/20220611102656.10954-1-yf.wang@mediatek.com/
- Add and update patch
  - Add [2/3] patch update MTK_IOMMU_ADDR to calculate the special ttbr.
  - Save the special ttbr to mtk_iommu_domain avoid calculate it again.

Changes in v7:
https://lore.kernel.org/linux-mediatek/20220530080432.29123-1-yf.wang@mediatek.com/
- Update patch and commit message
  - Extend arm_v7s_cfg.ttbr to u64.
  - Move the special ttbr logical into mtk_iommu.c.
  - Update commit message for single normal zone.

Changes in v6:
- Update patch: gfp_l1 = GFP_KERNEL | __GFP_ZERO;
- Update commit message for single normal zone.

Changes in v5:
- Only update message-ID.

Changes in v4:
- Fix build test WARNING: use GENMASK_ULL replace GENMASK.

Changes in v3:
- Add version changes description, there is No new code change in V3.

Changes in v2:
- Update patch and commit message
  - Add Level 1 pgtable PA up to 35bit.
  - This is new feature, remove stable@...r.kernel.org
  - Update commit message.

Ning Li (2):
  iommu/io-pgtable-arm-v7s: Add a quirk to allow pgtable PA up to 35bit
  iommu/mediatek: Allow page table PA up to 35bit

 drivers/iommu/io-pgtable-arm-v7s.c | 75 ++++++++++++++++++++++--------
 drivers/iommu/mtk_iommu.c          | 13 +++--
 include/linux/io-pgtable.h         | 15 ++++--
 3 files changed, 73 insertions(+), 30 deletions(-)