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authorWill Deacon <will.deacon@arm.com>2017-03-31 12:23:43 +0100
committerWill Deacon <will.deacon@arm.com>2017-04-07 12:27:29 +0100
commit6ae979ab39a368c18ceb0424bf824d172d6ab56f (patch)
treed97e043a93e3da5582771b28da3bd0b011386684 /arch/arm64/mm
parentarm64: mm: unaligned access by user-land should be received as SIGBUS (diff)
downloadlinux-dev-6ae979ab39a368c18ceb0424bf824d172d6ab56f.tar.xz
linux-dev-6ae979ab39a368c18ceb0424bf824d172d6ab56f.zip
Revert "Revert "arm64: hugetlb: partial revert of 66b3923a1a0f""
The use of the contiguous bit by our hugetlb implementation violates the break-before-make requirements of the architecture and can lead to silent data corruption or TLB conflict aborts. Once again, disable these hugetlb sizes whilst it gets worked out. This reverts commit ab2e1b89230fa80328262c91d2d0a539a2790d6f. Conflicts: arch/arm64/mm/hugetlbpage.c Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to '')
-rw-r--r--arch/arm64/mm/hugetlbpage.c14
1 files changed, 0 insertions, 14 deletions
diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c
index e25584d72396..7514a000e361 100644
--- a/arch/arm64/mm/hugetlbpage.c
+++ b/arch/arm64/mm/hugetlbpage.c
@@ -294,10 +294,6 @@ static __init int setup_hugepagesz(char *opt)
hugetlb_add_hstate(PMD_SHIFT - PAGE_SHIFT);
} else if (ps == PUD_SIZE) {
hugetlb_add_hstate(PUD_SHIFT - PAGE_SHIFT);
- } else if (ps == (PAGE_SIZE * CONT_PTES)) {
- hugetlb_add_hstate(CONT_PTE_SHIFT);
- } else if (ps == (PMD_SIZE * CONT_PMDS)) {
- hugetlb_add_hstate((PMD_SHIFT + CONT_PMD_SHIFT) - PAGE_SHIFT);
} else {
hugetlb_bad_size();
pr_err("hugepagesz: Unsupported page size %lu K\n", ps >> 10);
@@ -306,13 +302,3 @@ static __init int setup_hugepagesz(char *opt)
return 1;
}
__setup("hugepagesz=", setup_hugepagesz);
-
-#ifdef CONFIG_ARM64_64K_PAGES
-static __init int add_default_hugepagesz(void)
-{
- if (size_to_hstate(CONT_PTES * PAGE_SIZE) == NULL)
- hugetlb_add_hstate(CONT_PTE_SHIFT);
- return 0;
-}
-arch_initcall(add_default_hugepagesz);
-#endif