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    SubjectRe: [PATCH v13 3/8] arm64: mte: Sync tags for pages where PTE is untagged
    On Mon, May 24, 2021 at 11:45:08AM +0100, Steven Price wrote:
    > A KVM guest could store tags in a page even if the VMM hasn't mapped
    > the page with PROT_MTE. So when restoring pages from swap we will
    > need to check to see if there are any saved tags even if !pte_tagged().
    >
    > However don't check pages for which pte_access_permitted() returns false
    > as these will not have been swapped out.
    >
    > Signed-off-by: Steven Price <steven.price@arm.com>

    Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>

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