diff options
| author | Yang Shi <[email protected]> | 2024-10-01 15:52:19 -0700 |
|---|---|---|
| committer | Catalin Marinas <[email protected]> | 2024-10-16 14:50:47 +0100 |
| commit | 25c17c4b55def92a01e3eecc9c775a6ee25ca20f (patch) | |
| tree | 2ce5cdf56b30e77683c9ffe80402930e14e1e413 /arch/arm64/kvm/mmu.c | |
| parent | 9852d85ec9d492ebef56dc5f229416c925758edc (diff) | |
hugetlb: arm64: add mte support
Enable MTE support for hugetlb.
The MTE page flags will be set on the folio only. When copying
hugetlb folio (for example, CoW), the tags for all subpages will be copied
when copying the first subpage.
When freeing hugetlb folio, the MTE flags will be cleared.
Reviewed-by: Catalin Marinas <[email protected]>
Reviewed-by: David Hildenbrand <[email protected]>
Signed-off-by: Yang Shi <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Catalin Marinas <[email protected]>
Diffstat (limited to 'arch/arm64/kvm/mmu.c')
| -rw-r--r-- | arch/arm64/kvm/mmu.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index a509b63bd4dd..962449f9ac2f 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1401,10 +1401,21 @@ static void sanitise_mte_tags(struct kvm *kvm, kvm_pfn_t pfn, { unsigned long i, nr_pages = size >> PAGE_SHIFT; struct page *page = pfn_to_page(pfn); + struct folio *folio = page_folio(page); if (!kvm_has_mte(kvm)) return; + if (folio_test_hugetlb(folio)) { + /* Hugetlb has MTE flags set on head page only */ + if (folio_try_hugetlb_mte_tagging(folio)) { + for (i = 0; i < nr_pages; i++, page++) + mte_clear_page_tags(page_address(page)); + folio_set_hugetlb_mte_tagged(folio); + } + return; + } + for (i = 0; i < nr_pages; i++, page++) { if (try_page_mte_tagging(page)) { mte_clear_page_tags(page_address(page)); |