kernel/linux.git/arch/microblaze/include/asm/page.h, branch v6.2

mm/page_alloc: always initialize memory map for the holes

2021-09-03T16:58:15+00:00

Patch series "mm: ensure consistency of memory map poisoning". Currently memory map allocation for FLATMEM case does not poison the struct pages regardless of CONFIG_PAGE_POISON setting. This happens because allocation of the memory map for FLATMEM and SPARSMEM use different memblock functions and those that are used for SPARSMEM case (namely memblock_alloc_try_nid_raw() and memblock_alloc_exact_nid_raw()) implicitly poison the allocated memory. Another side effect of this implicit poisoning is that early setup code that uses the same functions to allocate memory burns cycles for the memory poisoning even if it was not intended. These patches introduce memmap_alloc() wrapper that ensure that the memory map allocation is consistent for different memory models. This patch (of 4): Currently memory map for the holes is initialized only when SPARSEMEM memory model is used. Yet, even with FLATMEM there could be holes in the physical memory layout that have memory map entries. For instance, the memory reserved using e820 API on i386 or "reserved-memory" nodes in device tree would not appear in memblock.memory and hence the struct pages for such holes will be skipped during memory map initialization. These struct pages will be zeroed because the memory map for FLATMEM systems is allocated with memblock_alloc_node() that clears the allocated memory. While zeroed struct pages do not cause immediate problems, the correct behaviour is to initialize every page using __init_single_page(). Besides, enabling page poison for FLATMEM case will trigger PF_POISONED_CHECK() unless the memory map is properly initialized. Make sure init_unavailable_range() is called for both SPARSEMEM and FLATMEM so that struct pages representing memory holes would appear as PG_Reserved with any memory layout. [rppt@kernel.org: fix microblaze] Link: https://lkml.kernel.org/r/YQWW3RCE4eWBuMu/@kernel.org Link: https://lkml.kernel.org/r/20210714123739.16493-1-rppt@kernel.org Link: https://lkml.kernel.org/r/20210714123739.16493-2-rppt@kernel.org Signed-off-by: Mike Rapoport Acked-by: David Hildenbrand Tested-by: Guenter Roeck Cc: Michal Simek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

microblaze: Cleanup unused functions

2021-05-31T12:24:25+00:00

These functions haven't been used, so just remove them. The patch just uses grep to verify. Signed-off-by: Guo Ren Reviewed-by: Anup Patel Reviewed-by: Christoph Hellwig Reviewed-by: Palmer Dabbelt Cc: Arnd Bergmann Cc: Michal Simek Link: https://lore.kernel.org/r/1622350408-44875-3-git-send-email-guoren@kernel.org Signed-off-by: Michal Simek

microblaze: Remove noMMU code

2020-11-26T15:39:35+00:00

This configuration is obsolete and likely none is really using it. That's why remove it to simplify code. Note about CONFIG_MMU in hw_exception_handler.S is left intentionally for better comment understanding. Cc: Mike Rapoport Cc: Arnd Bergmann Signed-off-by: Michal Simek Acked-by: Mike Rapoport Acked-by: Arnd Bergmann Link: https://lore.kernel.org/r/43486cab370e0c0a79860120b71e0caac75a7e44.1606397528.git.michal.simek@xilinx.com

mm/vma: define a default value for VM_DATA_DEFAULT_FLAGS

2020-04-10T22:36:21+00:00

There are many platforms with exact same value for VM_DATA_DEFAULT_FLAGS This creates a default value for VM_DATA_DEFAULT_FLAGS in line with the existing VM_STACK_DEFAULT_FLAGS. While here, also define some more macros with standard VMA access flag combinations that are used frequently across many platforms. Apart from simplification, this reduces code duplication as well. Signed-off-by: Anshuman Khandual Signed-off-by: Andrew Morton Reviewed-by: Vlastimil Babka Acked-by: Geert Uytterhoeven Cc: Richard Henderson Cc: Vineet Gupta Cc: Russell King Cc: Catalin Marinas Cc: Mark Salter Cc: Guo Ren Cc: Yoshinori Sato Cc: Brian Cain Cc: Tony Luck Cc: Michal Simek Cc: Ralf Baechle Cc: Paul Burton Cc: Nick Hu Cc: Ley Foon Tan Cc: Jonas Bonn Cc: "James E.J. Bottomley" Cc: Michael Ellerman Cc: Paul Walmsley Cc: Heiko Carstens Cc: Rich Felker Cc: "David S. Miller" Cc: Guan Xuetao Cc: Thomas Gleixner Cc: Jeff Dike Cc: Chris Zankel Link: http://lkml.kernel.org/r/1583391014-8170-2-git-send-email-anshuman.khandual@arm.com Signed-off-by: Linus Torvalds

microblaze: Convert headers to SPDX license

2020-02-25T11:33:19+00:00

Covert all headers to SPDX. Signed-off-by: Michal Simek Reviewed-by: Stefan Asserhall Reviewed-by: Arnd Bergmann

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

arch, mm: convert all architectures to use 5level-fixup.h

2017-03-09T19:48:47+00:00

If an architecture uses 4level-fixup.h we don't need to do anything as it includes 5level-fixup.h. If an architecture uses pgtable-nop*d.h, define __ARCH_USE_5LEVEL_HACK before inclusion of the header. It makes asm-generic code to use 5level-fixup.h. If an architecture has 4-level paging or folds levels on its own, include 5level-fixup.h directly. Signed-off-by: Kirill A. Shutemov Acked-by: Michal Hocko Signed-off-by: Linus Torvalds

mm/microblaze: clean up unused VALID_PAGE()

2013-07-03T23:07:40+00:00

VALID_PAGE() has been removed from kernel long time ago, so clean up it. Signed-off-by: Jiang Liu Cc: Michal Simek Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

microblaze: Support 4k/16k/64k pages

2012-10-04T12:52:49+00:00

Add support for page size which is supported by MMU. Remove 8k and 32k page size because they are not supported by MMU. Signed-off-by: Michal Simek

microblaze: Do not used hardcoded value in exception handler

2012-10-04T12:47:01+00:00

Use predefined macros to support more page sizes. Signed-off-by: Michal Simek