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authorPeter Collingbourne <pcc@google.com>2022-11-04 04:10:40 +0300
committerMarc Zyngier <maz@kernel.org>2022-11-29 12:26:07 +0300
commitc911f0d4687947915f04024aa01803247fcf7f1a (patch)
tree885642137cf684a9563263f0c88a475e553f6f30 /Documentation/virt/kvm/api.rst
parentd89585fbb30869011b326ef26c94c3137d228df9 (diff)
downloadlinux-c911f0d4687947915f04024aa01803247fcf7f1a.tar.xz
KVM: arm64: permit all VM_MTE_ALLOWED mappings with MTE enabled
Certain VMMs such as crosvm have features (e.g. sandboxing) that depend on being able to map guest memory as MAP_SHARED. The current restriction on sharing MAP_SHARED pages with the guest is preventing the use of those features with MTE. Now that the races between tasks concurrently clearing tags on the same page have been fixed, remove this restriction. Note that this is a relaxation of the ABI. Signed-off-by: Peter Collingbourne <pcc@google.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Steven Price <steven.price@arm.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20221104011041.290951-8-pcc@google.com
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