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| author |  Claudio Imbrenda <imbrenda@linux.ibm.com>
| 2024-04-16 13:42:20 +0200 |
|---|---|---|
| committer |  Alexander Gordeev <agordeev@linux.ibm.com>
| 2024-04-22 12:47:47 +0200 |
| commit | 412050af2ea39407fe43324b0be4ab641530ce88 (patch) | |
| tree | 5b75501808ba00c6e3920c647920cc9ab0ff944b /arch | |
| parent | s390/mm: Fix storage key clearing for guest huge pages (diff) | |
| download | linux-412050af2ea39407fe43324b0be4ab641530ce88.tar.gz linux-412050af2ea39407fe43324b0be4ab641530ce88.tar.bz2 linux-412050af2ea39407fe43324b0be4ab641530ce88.zip | |
s390/mm: Fix clearing storage keys for huge pages
The function __storage_key_init_range() expects the end address to be
the first byte outside the range to be initialized. I.e. end - start
should be the size of the area to be initialized.
The current code works because __storage_key_init_range() will still loop
over every page in the range, but it is slower than using sske_frame().
Fixes: 3afdfca69870 ("s390/mm: Clear skeys for newly mapped huge guest pmds")
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Link: https://lore.kernel.org/r/20240416114220.28489-3-imbrenda@linux.ibm.com
Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/s390/mm/hugetlbpage.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/mm/hugetlbpage.c b/arch/s390/mm/hugetlbpage.c index c2e8242bd15d..dc3db86e13ff 100644 --- a/arch/s390/mm/hugetlbpage.c +++ b/arch/s390/mm/hugetlbpage.c @@ -139,7 +139,7 @@ static void clear_huge_pte_skeys(struct mm_struct *mm, unsigned long rste) } if (!test_and_set_bit(PG_arch_1, &page->flags)) - __storage_key_init_range(paddr, paddr + size - 1); + __storage_key_init_range(paddr, paddr + size); } void __set_huge_pte_at(struct mm_struct *mm, unsigned long addr, |