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| author | Steven Price <steven.price@arm.com> | 2021-06-21 14:17:12 +0300 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2021-06-22 16:08:05 +0300 |
| commit | ea7fc1bb1cd1b92b42b1d9273ce7e231d3dc9321 (patch) | |
| tree | 69524ca0a8e1c7048db4490cb5b73ad65266f2c5 /include/uapi/linux/kvm.h | |
| parent | 69e3b846d8a753f9f279f29531ca56b0f7563ad0 (diff) | |
| download | linux-ea7fc1bb1cd1b92b42b1d9273ce7e231d3dc9321.tar.xz | |
KVM: arm64: Introduce MTE VM feature
Add a new VM feature 'KVM_ARM_CAP_MTE' which enables memory tagging
for a VM. This will expose the feature to the guest and automatically
tag memory pages touched by the VM as PG_mte_tagged (and clear the tag
storage) to ensure that the guest cannot see stale tags, and so that
the tags are correctly saved/restored across swap.
Actually exposing the new capability to user space happens in a later
patch.
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Steven Price <steven.price@arm.com>
[maz: move VM_SHARED sampling into the critical section]
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210621111716.37157-3-steven.price@arm.com
Diffstat (limited to 'include/uapi/linux/kvm.h')
| -rw-r--r-- | include/uapi/linux/kvm.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h index 79d9c44d1ad7..d4da58ddcad7 100644 --- a/include/uapi/linux/kvm.h +++ b/include/uapi/linux/kvm.h @@ -1083,6 +1083,7 @@ struct kvm_ppc_resize_hpt { #define KVM_CAP_SGX_ATTRIBUTE 196 #define KVM_CAP_VM_COPY_ENC_CONTEXT_FROM 197 #define KVM_CAP_PTP_KVM 198 +#define KVM_CAP_ARM_MTE 199 #ifdef KVM_CAP_IRQ_ROUTING |