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authorCatalin Marinas <catalin.marinas@arm.com>2022-11-04 02:10:36 +0100
committerMarc Zyngier <maz@kernel.org>2022-11-29 10:26:07 +0100
commit2dbf12ae132cc78048615cfa19c9be64baaf0ced (patch)
treec7c9d14c12d3cefa8c891518e5d06465bce004c2 /mm
parentarm64: mte: Fix/clarify the PG_mte_tagged semantics (diff)
downloadlinux-2dbf12ae132cc78048615cfa19c9be64baaf0ced.tar.xz
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KVM: arm64: Simplify the sanitise_mte_tags() logic
Currently sanitise_mte_tags() checks if it's an online page before attempting to sanitise the tags. Such detection should be done in the caller via the VM_MTE_ALLOWED vma flag. Since kvm_set_spte_gfn() does not have the vma, leave the page unmapped if not already tagged. Tag initialisation will be done on a subsequent access fault in user_mem_abort(). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> [pcc@google.com: fix the page initializer] Signed-off-by: Peter Collingbourne <pcc@google.com> Reviewed-by: Steven Price <steven.price@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Marc Zyngier <maz@kernel.org> Cc: Peter Collingbourne <pcc@google.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20221104011041.290951-4-pcc@google.com
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