linux/arch/microblaze/include/asm/tlb.h, branch master

microblaze: Remove architecture tlb.h and use generic one

2020-02-25T11:33:19Z

There is no reason to have this empty file if it is just link to asm-generic/tlb.h. Signed-off-by: Michal Simek Reviewed-by: Stefan Asserhall Reviewed-by: Arnd Bergmann

arch/tlb: Clean up simple architectures

2019-04-03T08:32:54Z

For the architectures that do not implement their own tlb_flush() but do already use the generic mmu_gather, there are two options: 1) the platform has an efficient flush_tlb_range() and asm-generic/tlb.h doesn't need any overrides at all. 2) the platform lacks an efficient flush_tlb_range() and we select MMU_GATHER_NO_RANGE to minimize full invalidates. Convert all 'simple' architectures to one of these two forms. alpha: has no range invalidate -> 2 arc: already used flush_tlb_range() -> 1 c6x: has no range invalidate -> 2 hexagon: has an efficient flush_tlb_range() -> 1 (flush_tlb_mm() is in fact a full range invalidate, so no need to shoot down everything) m68k: has inefficient flush_tlb_range() -> 2 microblaze: has no flush_tlb_range() -> 2 mips: has efficient flush_tlb_range() -> 1 (even though it currently seems to use flush_tlb_mm()) nds32: already uses flush_tlb_range() -> 1 nios2: has inefficient flush_tlb_range() -> 2 (no limit on range iteration) openrisc: has inefficient flush_tlb_range() -> 2 (no limit on range iteration) parisc: already uses flush_tlb_range() -> 1 sparc32: already uses flush_tlb_range() -> 1 unicore32: has inefficient flush_tlb_range() -> 2 (no limit on range iteration) xtensa: has efficient flush_tlb_range() -> 1 Note this also fixes a bug in the existing code for a number platforms. Those platforms that did: tlb_end_vma() -> if (!full_mm) flush_tlb_*() tlb_flush -> if (full_mm) flush_tlb_mm() missed the case of shift_arg_pages(), which doesn't have @fullmm set, nor calls into tlb_*vma(), but still frees page-tables and thus needs an invalidate. The new code handles this by detecting a non-empty range, and either issuing the matching range invalidate or a full invalidate, depending on the capabilities. No change in behavior intended. Signed-off-by: Peter Zijlstra (Intel) Cc: Andrew Morton Cc: Andy Lutomirski Cc: Aneesh Kumar K.V Cc: Borislav Petkov Cc: Dave Hansen Cc: David S. Miller Cc: Greentime Hu Cc: Guan Xuetao Cc: H. Peter Anvin Cc: Helge Deller Cc: Jonas Bonn Cc: Ley Foon Tan Cc: Linus Torvalds Cc: Mark Salter Cc: Max Filippov Cc: Michal Simek Cc: Nick Piggin Cc: Paul Burton Cc: Peter Zijlstra Cc: Richard Henderson Cc: Richard Kuo Cc: Rik van Riel Cc: Thomas Gleixner Cc: Vineet Gupta Cc: Will Deacon Signed-off-by: Ingo Molnar

mmu_gather: move minimal range calculations into generic code

2014-11-17T10:12:42Z

On architectures with hardware broadcasting of TLB invalidation messages , it makes sense to reduce the range of the mmu_gather structure when unmapping page ranges based on the dirty address information passed to tlb_remove_tlb_entry. arm64 already does this by directly manipulating the start/end fields of the gather structure, but this confuses the generic code which does not expect these fields to change and can end up calculating invalid, negative ranges when forcing a flush in zap_pte_range. This patch moves the minimal range calculation out of the arm64 code and into the generic implementation, simplifying zap_pte_range in the process (which no longer needs to care about start/end, since they will point to the appropriate ranges already). With the range being tracked by core code, the need_flush flag is dropped in favour of checking that the end of the range has actually been set. Cc: Benjamin Herrenschmidt Cc: Peter Zijlstra Cc: Russell King - ARM Linux Cc: Michal Simek Acked-by: Linus Torvalds Signed-off-by: Will Deacon

microblaze: Fix missing pagemap.h

2011-01-16T13:29:21Z

Add missing linux/pagemap.h to solve compilation error. Error log: In file included from linux/arch/microblaze/include/asm/tlb.h:17, from mm/pgtable-generic.c:9: include/asm-generic/tlb.h: In function 'tlb_flush_mmu': include/asm-generic/tlb.h:76: error: implicit declaration of function 'release_pages' include/asm-generic/tlb.h: In function 'tlb_remove_page': include/asm-generic/tlb.h:105: error: implicit declaration of function 'page_cache_release' Signed-off-by: Michal Simek

microblaze: Define tlb_flush macro

2009-07-27T05:39:53Z

This fix remove bug which we had till now in all Microblaze MMU code. Primary tested on mmap01 LTP test. We forget to flush invalid tlb which were changed - we used them and there were wrong old data which wasn't correct. Signed-off-by: Michal Simek

microblaze_mmu_v2: Update tlb.h and tlbflush.h

2009-05-26T14:45:19Z

Signed-off-by: Michal Simek

microblaze_v8: memory inicialization, MMU, TLB

2009-03-27T13:25:29Z

Reviewed-by: Ingo Molnar Acked-by: John Linn Acked-by: Stephen Neuendorffer Acked-by: John Williams Signed-off-by: Michal Simek