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arm64: KVM: Inject a vSerror if detecting a bad GICV access at EL2

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If, when proxying a GICV access at EL2, we detect that the guest is
doing something silly, report an EL1 SError instead ofgnoring the
access.

Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
This commit is contained in:
Marc Zyngier
2016-09-06 14:02:17 +01:00
committed by Christoffer Dall
parent 21977a4c57
commit 3272f0d08e
3 changed files with 32 additions and 9 deletions
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18
arch/arm64/kvm/hyp/switch.c
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@@ -311,9 +311,21 @@ again:
!kvm_vcpu_dabt_isextabt(vcpu) &&
!kvm_vcpu_dabt_iss1tw(vcpu);
if (valid && __vgic_v2_perform_cpuif_access(vcpu)) {
__skip_instr(vcpu);
goto again;
if (valid) {
int ret = __vgic_v2_perform_cpuif_access(vcpu);
if (ret == 1) {
__skip_instr(vcpu);
goto again;
}
if (ret == -1) {
/* Promote an illegal access to an SError */
__skip_instr(vcpu);
exit_code = ARM_EXCEPTION_EL1_SERROR;
}
/* 0 falls through to be handler out of EL2 */
}
}