Hi Catalin, could you help to pick up it, thanks.
On 2022/6/7 20:50, Kefeng Wang wrote:
1. Enhance generic ioremap to make it more useful.
2. Let's arm64 use GENERIC_IOREMAP to cleanup code.
3. Support HAVE_IOREMAP_PROT on arm64, which enable generic_access_phys(),
it is useful when debug(eg, gdb) via access_process_vm device memory
infrastructure.
v5:
- break long lines(> 80 cols), per Christoph Hellwig
- move is_vmalloc_addr() check from arm64 into generic ioremap, per
Christoph Hellwig
- make arm64's ioremap_cache as an inline function, per Christoph
- keep changes simple, make ioremap/iounmap_allowed return bool, per
Baoquan He
- simplify use 'void *' instead of 'void __iomem *' in iounmap, then
drop __force annotation
v4:
- update based on v5.19-rc1
- add generic arch_ioremap/arch_iounmap define, per Andrew Monrton
- simply return an int for arch_ioremap and rename arch_ioremap/arch_iounmap
to a better name, ioremap_allowed/iounmap_allowed, per Arnd Bergmann
- add __force annotation to slince sparse warning in vunmap()
Note,
1) after the renaming, the arm's change(patch1) is not the necessary
dependence for the following changes, but as a cleanup, still post
it here, hope it go in via the arm64 tree with reset of the series
directly if no object.
2) the changes in this version only influence on patch4/5, so retain
the ack/review.
v3:
- add cleanup patch to kill ARM's unused arch_iounmap(the naming will be
used in GENERIC_IOREMAP) and add comments for arch_ioremap/arch_iounmap
hooks, per Anshuman Khandual
- collect ack/review
v2:
- s/addr/phys_addr in ioremap_prot, suggested by Andrew Morton
- rename arch_ioremap/iounmap_check to arch_ioremap/iounmap
and change return value, per Christoph Hellwig and Andrew Morton
- and use 'ifndef arch_ioremap' instead of weak function, per Arnd Bergmann
- collect ack/review
Kefeng Wang (6):
ARM: mm: kill unused runtime hook arch_iounmap()
mm: ioremap: Use more sensibly name in ioremap_prot()
mm: ioremap: Setup phys_addr of struct vm_struct
mm: ioremap: Add ioremap/iounmap_allowed()
arm64: mm: Convert to GENERIC_IOREMAP
arm64: Add HAVE_IOREMAP_PROT support
.../features/vm/ioremap_prot/arch-support.txt | 2 +-
arch/arm/include/asm/io.h | 4 +-
arch/arm/mm/ioremap.c | 9 +-
arch/arm/mm/nommu.c | 9 +-
arch/arm64/Kconfig | 2 +
arch/arm64/include/asm/io.h | 24 +++--
arch/arm64/include/asm/pgtable.h | 10 +++
arch/arm64/kernel/acpi.c | 2 +-
arch/arm64/mm/hugetlbpage.c | 10 ---
arch/arm64/mm/ioremap.c | 90 ++-----------------
include/asm-generic/io.h | 29 +++++-
mm/ioremap.c | 26 ++++--
12 files changed, 90 insertions(+), 127 deletions(-)
