On 02/02/17 18:48, Ard Biesheuvel wrote: >>> ESR 0x02000000 FAR 0x1DE7EC7EDBADC0DE >>> > > > $ git grep -C5 -ni 0x1DE7EC7EDBADC0DE > arch/arm64/kvm/sys_regs.h-105-static inline void reset_unknown(struct > kvm_vcpu *vcpu, > arch/arm64/kvm/sys_regs.h-106- const struct > sys_reg_desc *r) > arch/arm64/kvm/sys_regs.h-107-{ > arch/arm64/kvm/sys_regs.h-108- BUG_ON(!r->reg); > arch/arm64/kvm/sys_regs.h-109- BUG_ON(r->reg >= NR_SYS_REGS); > arch/arm64/kvm/sys_regs.h:110: vcpu_sys_reg(vcpu, r->reg) = > 0x1de7ec7edbadc0deULL; > arch/arm64/kvm/sys_regs.h-111-} > arch/arm64/kvm/sys_regs.h-112- > > In other words (or rather, in words), KVM is triggering this exception > in the guest deliberately, which I suspect has something to do with > the lack of a GIC? Are you using these patches Peter mentions? "detected bad code". Mind = blown.