[PATCH v3 7/7] Documentation: document the ABI changes for KVM_CAP_ARM_MTE
From: Peter Collingbourne <hidden>
Date: 2022-08-10 19:34:48
Also in:
kvm, kvmarm
Subsystem:
documentation, kernel virtual machine (kvm), the rest · Maintainers:
Jonathan Corbet, Paolo Bonzini, Linus Torvalds
Document both the restriction on VM_MTE_ALLOWED mappings and the relaxation for shared mappings. Signed-off-by: Peter Collingbourne <redacted> --- Documentation/virt/kvm/api.rst | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst
index 9788b19f9ff7..30e0c35828ef 100644
--- a/Documentation/virt/kvm/api.rst
+++ b/Documentation/virt/kvm/api.rst@@ -7486,8 +7486,9 @@ hibernation of the host; however the VMM needs to manually save/restore the tags as appropriate if the VM is migrated. When this capability is enabled all memory in memslots must be mapped as -not-shareable (no MAP_SHARED), attempts to create a memslot with a -MAP_SHARED mmap will result in an -EINVAL return. +``MAP_ANONYMOUS`` or with a RAM-based file mapping (``tmpfs``, ``memfd``), +attempts to create a memslot with an invalid mmap will result in an +-EINVAL return. When enabled the VMM may make use of the ``KVM_ARM_MTE_COPY_TAGS`` ioctl to perform a bulk copy of tags to/from the guest.
--
2.37.1.559.g78731f0fdb-goog
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