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asm-generic/tlb, arch: Invert CONFIG_HAVE_RCU_TABLE_INVALIDATE

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Make issuing a TLB invalidate for page-table pages the normal case.

The reason is twofold:

 - too many invalidates is safer than too few,
 - most architectures use the linux page-tables natively
   and would thus require this.

Make it an opt-out, instead of an opt-in.

No change in behavior intended.

Signed-off-by: Peter Zijlstra (Intel) <[email protected]>
Acked-by: Will Deacon <[email protected]>
Cc: Andrew Morton <[email protected]>
Cc: Andy Lutomirski <[email protected]>
Cc: Borislav Petkov <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: H. Peter Anvin <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Rik van Riel <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
Peter Zijlstra 2018-09-19 13:24:41 +02:00 • committed by Ingo Molnar
commit 96bc9567cb
7 changed files with 9 additions and 8 deletions
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2
arch/Kconfig
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@ -383,7 +383,7 @@ config HAVE_ARCH_JUMP_LABEL_RELATIVE
config HAVE_RCU_TABLE_FREE
bool
config HAVE_RCU_TABLE_INVALIDATE
config HAVE_RCU_TABLE_NO_INVALIDATE
bool
config HAVE_MMU_GATHER_PAGE_SIZE