[PATCH v3 5/7] KVM: arm64: unify the tests for VMAs in memslots when MTE is enabled

[Catalin Marinas]

On Wed, Aug 10, 2022 at 12:30:31PM -0700, Peter Collingbourne wrote:
> Previously we allowed creating a memslot containing a private mapping that
> was not VM_MTE_ALLOWED, but would later reject KVM_RUN with -EFAULT. Now
> we reject the memory region at memslot creation time.
> 
> Since this is a minor tweak to the ABI (a VMM that created one of
> these memslots would fail later anyway), no VMM to my knowledge has
> MTE support yet, and the hardware with the necessary features is not
> generally available, we can probably make this ABI change at this point.

I don't think that's a noticeable ABI change. As you said, such VMs
would fail later anyway when trying to access such page.

Reviewed-by: Catalin Marinas <catalin.marinas at arm.com>