Re: [PATCH v6 40/64] KVM: arm64: nv: Trap and emulate AT instructions from virtual EL2

2022-02-24 Thread Alexandru Elisei
Hi, On Fri, Jan 28, 2022 at 12:18:48PM +, Marc Zyngier wrote: > From: Jintack Lim > > When supporting nested virtualization a guest hypervisor executing AT > instructions must be trapped and emulated by the host hypervisor, > because untrapped AT instructions operating on S1E1 will use the w

[PATCH v6 40/64] KVM: arm64: nv: Trap and emulate AT instructions from virtual EL2

2022-01-28 Thread Marc Zyngier
From: Jintack Lim When supporting nested virtualization a guest hypervisor executing AT instructions must be trapped and emulated by the host hypervisor, because untrapped AT instructions operating on S1E1 will use the wrong translation regieme (the one used to emulate virtual EL2 in EL1 instead