Re: [PATCH 17/19] arm/arm64: KVM: Inject virtual abort when guest exits on external abort

Christoffer Dall
2016-09-08T09:09:33Z

On Tue, Sep 06, 2016 at 02:02:15PM +0100, Marc Zyngier wrote:
> If we spot a data abort bearing the ESR_EL2.EA bit set, we know that
> this is an external abort, and that should be punished by a the injection

nit: s/a//

(I can fix this up though)

> of an abort.
>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> ---
> arch/arm/kvm/mmu.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
> index bda27b6..6827b54 100644
> --- a/arch/arm/kvm/mmu.c
> +++ b/arch/arm/kvm/mmu.c
> @@ -1434,6 +1434,11 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run)
> int ret, idx;
>
> is_iabt = kvm_vcpu_trap_is_iabt(vcpu);
> + if (unlikely(!is_iabt && kvm_vcpu_dabt_isextabt(vcpu))) {
> + kvm_inject_vabt(vcpu);
> + return 1;
> + }
> +
> fault_ipa = kvm_vcpu_get_fault_ipa(vcpu);
>
> trace_kvm_guest_fault(*vcpu_pc(vcpu), kvm_vcpu_get_hsr(vcpu),
> --
> 2.1.4
>