[PATCH v1 00/13] Tidy up cache.S

[Fuad Tabba]

TO: linux-arm-kernel at lists.infradead.org
CC: will at kernel.org, catalin.marinas at arm.com, mark.rutland at arm.com, maz at kernel.org,
ardb at kernel.org, james.morse at arm.com, alexandru.elisei at arm.com,
suzuki.poulose at arm.com

Hi,

As has been noted before [1], the code in cache.S isn't very tidy. Some of its
functions accept address ranges by start and size, whereas others with similar
names do so by start and end. This has resulted in at least one bug [2].

Moreover, invalidate_icache_range and __flush_icache_range toggle uaccess,
which isn't necessary because they work on the kernel linear map [3].

This patch series attempts to fix these issues, as well as tidy up the code in
general to reduce ambiguity and make it consistent with Arm terminology. No
functional change intended in this series.

This series is based on v5.13-rc1. You can find the applied series here [4].

Cheers,
/fuad

[1] https://lore.kernel.org/linux-arch/20200511075115.GA16134@willie-the-truck/
[2] https://lore.kernel.org/linux-arch/20200510075510.987823-3-hch@lst.de/
[3] https://lore.kernel.org/linux-arch/20200511110014.lb9PEahJ4hVOYrbwIb_qUHXyNy9KQzNFdb_I3YlzY6A@z/
[4] https://android-kvm.googlesource.com/linux/+/refs/heads/tabba/fixcache-5.13

Fuad Tabba (13):
  arm64: Do not enable uaccess for flush_icache_range
  arm64: Do not enable uaccess for invalidate_icache_range
  arm64: Downgrade flush_icache_range to invalidate
  arm64: Move documentation of dcache_by_line_op
  arm64: __inval_dcache_area to take end parameter instead of size
  arm64: dcache_by_line_op to take end parameter instead of size
  arm64: __flush_dcache_area to take end parameter instead of size
  arm64: __clean_dcache_area_poc to take end parameter instead of size
  arm64: __clean_dcache_area_pop to take end parameter instead of size
  arm64: __clean_dcache_area_pou to take end parameter instead of size
  arm64: sync_icache_aliases to take end parameter instead of size
  arm64: Fix cache maintenance function comments
  arm64: Rename arm64-internal cache maintenance functions

 arch/arm64/include/asm/arch_gicv3.h |   3 +-
 arch/arm64/include/asm/assembler.h  |  52 ++++-----
 arch/arm64/include/asm/cacheflush.h |  69 +++++++-----
 arch/arm64/include/asm/efi.h        |   2 +-
 arch/arm64/include/asm/kvm_mmu.h    |   7 +-
 arch/arm64/kernel/alternative.c     |   2 +-
 arch/arm64/kernel/efi-entry.S       |   9 +-
 arch/arm64/kernel/head.S            |  13 +--
 arch/arm64/kernel/hibernate.c       |  20 ++--
 arch/arm64/kernel/idreg-override.c  |   3 +-
 arch/arm64/kernel/image-vars.h      |   2 +-
 arch/arm64/kernel/insn.c            |   2 +-
 arch/arm64/kernel/kaslr.c           |  12 ++-
 arch/arm64/kernel/machine_kexec.c   |  25 +++--
 arch/arm64/kernel/probes/uprobes.c  |   2 +-
 arch/arm64/kernel/smp.c             |   8 +-
 arch/arm64/kernel/smp_spin_table.c  |   7 +-
 arch/arm64/kernel/sys_compat.c      |   2 +-
 arch/arm64/kvm/arm.c                |   2 +-
 arch/arm64/kvm/hyp/nvhe/cache.S     |   4 +-
 arch/arm64/kvm/hyp/nvhe/setup.c     |   3 +-
 arch/arm64/kvm/hyp/nvhe/tlb.c       |   2 +-
 arch/arm64/kvm/hyp/pgtable.c        |  13 ++-
 arch/arm64/lib/uaccess_flushcache.c |   4 +-
 arch/arm64/mm/cache.S               | 157 ++++++++++++++++------------
 arch/arm64/mm/flush.c               |  29 ++---
 26 files changed, 261 insertions(+), 193 deletions(-)


base-commit: 6efb943b8616ec53a5e444193dccf1af9ad627b5
-- 
2.31.1.607.g51e8a6a459-goog