tree 9aa5475315dc58c8bb1ce1419ff6f56bb36d4f65
parent 18a6eb397dbbff57d8937f74e369b1f8ab3138a3
author Marc Zyngier <maz@kernel.org> 1718703602 +0100
committer Marc Zyngier <maz@kernel.org> 1720952658 +0100

KVM: arm64: nv: Add SW walker for AT S1 emulation

In order to plug the brokenness of our current AT implementation,
we need a SW walker that is going to... err.. walk the S1 tables
and tell us what it finds.

Of course, it builds on top of our S2 walker, and share similar
concepts. The beauty of it is that since it uses kvm_read_guest(),
it is able to bring back pages that have been otherwise evicted.

This is then plugged in the two AT S1 emulation functions as
a "slow path" fallback. I'm not sure it is that slow, but hey.

Signed-off-by: Marc Zyngier <maz@kernel.org>