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| author | Marc Zyngier <maz@kernel.org> | 2022-12-05 14:38:24 +0000 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-12-05 14:38:24 +0000 |
| commit | 382b5b87a97d0958d0ee7d1f2a56df3c6e431770 (patch) | |
| tree | 2499fab7d5a7ed825b302f42010b777b06241ec5 /Documentation/virt/kvm | |
| parent | cfa72993d13302fe958a1a58234a1a8efa72a5b8 (diff) | |
| parent | a4baf8d2639f24d4d31983ff67c01878e7a5393f (diff) | |
Merge branch kvm-arm64/mte-map-shared into kvmarm-master/next
* kvm-arm64/mte-map-shared:
: .
: Update the MTE support to allow the VMM to use shared mappings
: to back the memslots exposed to MTE-enabled guests.
:
: Patches courtesy of Catalin Marinas and Peter Collingbourne.
: .
: Fix a number of issues with MTE, such as races on the tags
: being initialised vs the PG_mte_tagged flag as well as the
: lack of support for VM_SHARED when KVM is involved.
:
: Patches from Catalin Marinas and Peter Collingbourne.
: .
Documentation: document the ABI changes for KVM_CAP_ARM_MTE
KVM: arm64: permit all VM_MTE_ALLOWED mappings with MTE enabled
KVM: arm64: unify the tests for VMAs in memslots when MTE is enabled
arm64: mte: Lock a page for MTE tag initialisation
mm: Add PG_arch_3 page flag
KVM: arm64: Simplify the sanitise_mte_tags() logic
arm64: mte: Fix/clarify the PG_mte_tagged semantics
mm: Do not enable PG_arch_2 for all 64-bit architectures
Signed-off-by: Marc Zyngier <maz@kernel.org>
Diffstat (limited to 'Documentation/virt/kvm')
| -rw-r--r-- | Documentation/virt/kvm/api.rst | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/Documentation/virt/kvm/api.rst b/Documentation/virt/kvm/api.rst index 773e4b202f47..226b40baffb8 100644 --- a/Documentation/virt/kvm/api.rst +++ b/Documentation/virt/kvm/api.rst @@ -7385,8 +7385,9 @@ 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. |