linux-kernel - [PATCH v2 00/15] powerpc/32s: Use BATs/LTLBs for STRICT_KERNEL

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Message-Id: <cover.1547132681.git.christophe.leroy@c-s.fr>
Date:   Thu, 10 Jan 2019 15:11:38 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>, j.neuschaefer@....net
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 00/15] powerpc/32s: Use BATs/LTLBs for STRICT_KERNEL_RWX

The purpose of this serie is to:
- use BATs with STRICT_KERNEL_RWX on book3s (See patch 12 for details.)
- use LTLBs with STRICT_KERNEL_RWX on 8xx (See patch 14 for a few details.)

v2:
- Fix patch 2 (was patch 3 in v1) based on feedback from Jonathan.
- Added support for 8xx with LTLBs.
- Added systematic population of pagetables for Abatron BDI.

Christophe Leroy (15):
  powerpc/mm/32: add base address to mmu_mapin_ram()
  powerpc/mm/32s: rework mmu_mapin_ram()
  powerpc/mm/32s: use generic mmu_mapin_ram() for all blocks.
  powerpc/32: always populate page tables for Abatron BDI.
  powerpc/wii: remove wii_mmu_mapin_mem2()
  powerpc/mm/32s: use _PAGE_EXEC in setbat()
  powerpc/mm/32s: add setibat() clearibat() and update_bats()
  powerpc/32: add helper to write into segment registers
  powerpc/mmu: add is_strict_kernel_rwx() helper
  powerpc/kconfig: define PAGE_SHIFT inside Kconfig
  powerpc/kconfig: define CONFIG_DATA_SHIFT and CONFIG_ETEXT_SHIFT
  powerpc/mm/32s: Use BATs for STRICT_KERNEL_RWX
  powerpc/kconfig: make _etext and data areas alignment configurable on
    Book3s 32
  powerpc/8xx: don't disable large TLBs with CONFIG_STRICT_KERNEL_RWX
  powerpc/kconfig: make _etext and data areas alignment configurable on
    8xx

 arch/powerpc/Kconfig                          |  60 +++++++++
 arch/powerpc/include/asm/book3s/32/mmu-hash.h |   2 +
 arch/powerpc/include/asm/book3s/32/pgtable.h  |  11 ++
 arch/powerpc/include/asm/mmu.h                |  11 ++
 arch/powerpc/include/asm/nohash/32/mmu-8xx.h  |   3 +-
 arch/powerpc/include/asm/page.h               |  13 +-
 arch/powerpc/include/asm/reg.h                |   5 +
 arch/powerpc/kernel/head_32.S                 |  35 +++++
 arch/powerpc/kernel/head_8xx.S                |  33 ++++-
 arch/powerpc/kernel/vmlinux.lds.S             |   9 +-
 arch/powerpc/mm/40x_mmu.c                     |   2 +-
 arch/powerpc/mm/44x_mmu.c                     |   2 +-
 arch/powerpc/mm/8xx_mmu.c                     |  33 ++++-
 arch/powerpc/mm/fsl_booke_mmu.c               |   2 +-
 arch/powerpc/mm/init_32.c                     |   6 +-
 arch/powerpc/mm/mmu_decl.h                    |  10 +-
 arch/powerpc/mm/pgtable_32.c                  |  38 +++---
 arch/powerpc/mm/ppc_mmu_32.c                  | 178 ++++++++++++++++++++++----
 arch/powerpc/platforms/embedded6xx/wii.c      |  24 ----
 19 files changed, 378 insertions(+), 99 deletions(-)

-- 
2.13.3