Re: [PATCH v3 5/7] KVM: arm64: unify the tests for VMAs in memslots when MTE is enabled
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2022-09-02 13:43:07
Also in:
kvm, kvmarm
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@arm.com> _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel