[RFC PATCH v3 0/2] riscv: pgtable: Add "PBMT" extension supported

[guoren at kernel.org]

From: Guo Ren <guoren at linux.alibaba.com>

These patches are a continuation of "riscv: Add DMA_COHERENT support for
Allwinner D1". Compared with the previous factory-defined hardware
implementation, it now follows the PBMT extension proposal.

V2: https://lore.kernel.org/linux-riscv/1622970249-50770-10-git-send-email-guoren@kernel.org/
V1: https://lore.kernel.org/linux-riscv/1621400656-25678-3-git-send-email-guoren@kernel.org/

Changes since v2:
 - Change to PBMT extension proposal
 - Add pbmt in dts
 - Using img hdr for custom memory types moification

Changes since v1:
 - Rebase on linux-5.13-rc4
 - Support defconfig for different PTE attributes

Guo Ren (2):
  riscv: pgtable: Add custom protection_map init
  riscv: pgtable: Add "PBMT" extension supported

 arch/riscv/Kconfig                    |  4 +++
 arch/riscv/include/asm/image.h        |  6 ++--
 arch/riscv/include/asm/pgtable-64.h   |  8 +++--
 arch/riscv/include/asm/pgtable-bits.h | 55 ++++++++++++++++++++++++++--
 arch/riscv/include/asm/pgtable.h      | 17 ++++-----
 arch/riscv/kernel/head.S              |  6 ++++
 arch/riscv/mm/init.c                  | 68 +++++++++++++++++++++++++++++++++++
 mm/mmap.c                             |  4 +++
 8 files changed, 149 insertions(+), 19 deletions(-)

-- 
2.7.4