linux.git/arch/microblaze/include/asm/pgtable.h, branch v5.6

microblaze: use pgtable-nopmd instead of 4level-fixup

2019-12-05T03:44:15+00:00

microblaze has only two-level page tables and can use pgtable-nopmd and
folding of the upper layers.

Replace usage of include/asm-generic/4level-fixup.h and explicit
definition of __PAGETABLE_PMD_FOLDED in microblaze with
include/asm-generic/pgtable-nopmd.h and adjust page table manipulation
macros and functions accordingly.

Link: http://lkml.kernel.org/r/1572938135-31886-7-git-send-email-rppt@kernel.org
Signed-off-by: Mike Rapoport 
Cc: Anatoly Pugachev 
Cc: Anton Ivanov 
Cc: Arnd Bergmann 
Cc: "David S. Miller" 
Cc: Geert Uytterhoeven 
Cc: Greentime Hu 
Cc: Greg Ungerer 
Cc: Helge Deller 
Cc: "James E.J. Bottomley" 
Cc: Jeff Dike 
Cc: "Kirill A. Shutemov" 
Cc: Mark Salter 
Cc: Matt Turner 
Cc: Michal Simek 
Cc: Peter Rosin 
Cc: Richard Weinberger 
Cc: Rolf Eike Beer 
Cc: Russell King 
Cc: Russell King 
Cc: Sam Creasey 
Cc: Vincent Chen 
Cc: Vineet Gupta 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

mm: consolidate pgtable_cache_init() and pgd_cache_init()

2019-09-24T22:54:09+00:00

Both pgtable_cache_init() and pgd_cache_init() are used to initialize kmem
cache for page table allocations on several architectures that do not use
PAGE_SIZE tables for one or more levels of the page table hierarchy.

Most architectures do not implement these functions and use __weak default
NOP implementation of pgd_cache_init().  Since there is no such default
for pgtable_cache_init(), its empty stub is duplicated among most
architectures.

Rename the definitions of pgd_cache_init() to pgtable_cache_init() and
drop empty stubs of pgtable_cache_init().

Link: http://lkml.kernel.org/r/1566457046-22637-1-git-send-email-rppt@linux.ibm.com
Signed-off-by: Mike Rapoport 
Acked-by: Will Deacon 		[arm64]
Acked-by: Thomas Gleixner 	[x86]
Cc: Catalin Marinas 
Cc: Ingo Molnar 
Cc: Borislav Petkov 
Cc: Matthew Wilcox 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'microblaze-v5.0-rc1' of git://git.monstr.eu/linux-2.6-microblaze

2018-12-26T18:28:09+00:00

Pull arch/microblaze updates from Michal Simek:

 - Fix multiple Kbuild/Makefile issues

 - Start to use system call table generation

* tag 'microblaze-v5.0-rc1' of git://git.monstr.eu/linux-2.6-microblaze:
  microblaze: remove the explicit removal of system.dtb
  microblaze: fix race condition in building boot images
  microblaze: add linux.bin* and simpleImage.* to PHONY
  microblaze: fix multiple bugs in arch/microblaze/boot/Makefile
  microblaze: move "... is ready" messages to arch/microblaze/Makefile
  microblaze: adjust the help to the real behavior
  microblaze: generate uapi header and system call table files
  microblaze: add system call table generation support
  microblaze: move __NR_syscalls macro from asm/unistd.h
  microblaze: Typo s/use use/use/

microblaze: Typo s/use use/use/

2018-11-07T14:13:54+00:00

Trivial patch.

Signed-off-by: Geert Uytterhoeven 
Signed-off-by: Michal Simek

mm: make the __PAGETABLE_PxD_FOLDED defines non-empty

2018-11-02T07:31:52+00:00

Change the currently empty defines for __PAGETABLE_PMD_FOLDED,
__PAGETABLE_PUD_FOLDED and __PAGETABLE_P4D_FOLDED to return 1.
This makes it possible to use __is_defined() to test if the
preprocessor define exists.

Acked-by: Kirill A. Shutemov 
Signed-off-by: Martin Schwidefsky

dma-mapping: consolidate the dma mmap implementations

2018-09-20T07:01:16+00:00

The only functional differences (modulo a few missing fixes in the arch
code) is that architectures without coherent caches need a hook to
convert a virtual or dma address into a pfn, given that we don't have
the kernel linear mapping available for the otherwise easy virt_to_page
call.  As a side effect we can support mmap of the per-device coherent
area even on architectures not providing the callback, and we make
previous dangerous default methods dma_common_mmap actually save for
non-coherent architectures by rejecting it without the right helper.

In addition to that we need a hook so that some architectures can
override the protection bits when mmaping a dma coherent allocations.

Signed-off-by: Christoph Hellwig 
Acked-by: Paul Burton  # MIPS parts

microblaze: remove consistent_sync and consistent_sync_page

2018-07-20T12:29:54+00:00

Both unused.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Michal Simek

microblaze: use generic dma_noncoherent_ops

2018-07-20T12:29:47+00:00

Switch to the generic noncoherent direct mapping implementation.

This removes the direction-based optimizations in
sync_{single,sg}_for_{cpu,device} which were marked untestested and
do not match the usually very well tested {un,}map_{single,sg}
implementations.

Signed-off-by: Christoph Hellwig 
Signed-off-by: Michal Simek

microblaze: Provide pgprot_device/writecombine macros for nommu

2018-03-19T14:33:05+00:00

These macros are required for generic mmap.c implementation created by:
commit f719582435af ("PCI: Add pci_mmap_resource_range() and use it for
ARM64") which Microblaze is going to use.

Reported-by: kbuild test robot 
Suggested-by: David Woodhouse 
Signed-off-by: Michal Simek

mm: make FIRST_USER_ADDRESS unsigned long on all archs

2015-02-12T01:06:03+00:00

LKP has triggered a compiler warning after my recent patch "mm: account
pmd page tables to the process":

    mm/mmap.c: In function 'exit_mmap':
 >> mm/mmap.c:2857:2: warning: right shift count >= width of type [enabled by default]

The code:

 > 2857                WARN_ON(mm_nr_pmds(mm) >
   2858                                round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT);

In this, on tile, we have FIRST_USER_ADDRESS defined as 0.  round_up() has
the same type -- int.  PUD_SHIFT.

I think the best way to fix it is to define FIRST_USER_ADDRESS as unsigned
long.  On every arch for consistency.

Signed-off-by: Kirill A. Shutemov 
Reported-by: Wu Fengguang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds