Le 01/02/2020 à 09:04, Christophe Leroy a écrit :
When flushing any memory range, the flushing function flushes all TLBs. When (start) and (end - 1) are in the same memory page, flush that page instead. Signed-off-by: Christophe Leroy <christophe.le...@c-s.fr>
Reviewed-by: Segher Boessenkool <seg...@kernel.crashing.org>
--- v2: Reworked the test as the previous one was always false (end - start was PAGE_SIZE - 1 for a single page) --- arch/powerpc/mm/book3s32/tlb.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/powerpc/mm/book3s32/tlb.c b/arch/powerpc/mm/book3s32/tlb.c index 2fcd321040ff..724c0490fb17 100644 --- a/arch/powerpc/mm/book3s32/tlb.c +++ b/arch/powerpc/mm/book3s32/tlb.c @@ -79,11 +79,14 @@ static void flush_range(struct mm_struct *mm, unsigned long start, int count; unsigned int ctx = mm->context.id;+ start &= PAGE_MASK;if (!Hash) { - _tlbia(); + if (end - start <= PAGE_SIZE) + _tlbie(start); + else + _tlbia(); return; } - start &= PAGE_MASK; if (start >= end) return; end = (end - 1) | ~PAGE_MASK;
