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| author | Steve Capper <steve.capper@linaro.org> | 2014-06-27 11:05:57 +0100 |
|---|---|---|
| committer | Steve Capper <steve.capper@linaro.org> | 2014-06-27 11:33:57 +0100 |
| commit | 1824b7baeff54280035470b0f57784f23f1e3018 (patch) | |
| tree | 1bd801ed90f7e45031bacde56fb3aa22464af295 | |
| parent | 9580f7022362bf717457b6b73de1e0ed0fede211 (diff) | |
| download | linux-for-broonie/icache-fix.tar.gz | |
arm64: mm: Make icache synchronisation logic huge page awarefor-broonie/icache-fix
The __sync_icache_dcache routine will only flush the dcache for the
first page of a compound page, potentially leading to stale icache
data residing further on in a hugetlb page.
This patch addresses this issue by taking into consideration the
order of the page when flushing the dcache.
Reported-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Steve Capper <steve.capper@linaro.org>
| -rw-r--r-- | arch/arm64/mm/flush.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm64/mm/flush.c b/arch/arm64/mm/flush.c index e4193e3adc7..0d64089d28b 100644 --- a/arch/arm64/mm/flush.c +++ b/arch/arm64/mm/flush.c @@ -79,7 +79,8 @@ void __sync_icache_dcache(pte_t pte, unsigned long addr) return; if (!test_and_set_bit(PG_dcache_clean, &page->flags)) { - __flush_dcache_area(page_address(page), PAGE_SIZE); + __flush_dcache_area(page_address(page), + PAGE_SIZE << compound_order(page)); __flush_icache_all(); } else if (icache_is_aivivt()) { __flush_icache_all(); |