Revert "arm64: Mark kernel page ranges contiguous"

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This reverts commit 348a65cdcb.

Incorrect page table manipulation that does not respect the ARM ARM
recommended break-before-make sequence may lead to TLB conflicts. The
contiguous PTE patch makes the system even more susceptible to such
errors by changing the mapping from a single page to a contiguous range
of pages. An additional TLB invalidation would reduce the risk window,
however, the correct fix is to switch to a temporary swapper_pg_dir.
Once the correct workaround is done, the reverted commit will be
re-applied.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: Jeremy Linton <jeremy.linton@arm.com>

...

This commit is contained in:

Catalin Marinas 2015-11-26 15:42:41 +00:00

parent 0ebea80880

commit 667c27597c

1 changed files with 8 additions and 61 deletions

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69

arch/arm64/mm/mmu.c

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