Re: [PATCH v2] KVM: arm64: Remove host_cpu_context member from vcpu structure
From: Andrew Scull <hidden>
Date: 2020-06-08 14:52:02
Also in:
kvm, kvmarm
On Mon, Jun 08, 2020 at 09:56:57AM +0100, Marc Zyngier wrote:
For very long, we have kept this pointer back to the per-cpu host state, despite having working per-cpu accessors at EL2 for some time now. Recent investigations have shown that this pointer is easy to abuse in preemptible context, which is a sure sign that it would better be gone. Not to mention that a per-cpu pointer is faster to access at all times.
Helps to make the references to `kvm_host_data` clearer with there now being just one way to get to it and shows that it is scoped to the current CPU. A good change IMO! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel