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hw/xen: Implement EVTCHNOP_reset

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Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2022-12-14 19:36:15 +00:00
parent 306670461b
commit a15b10978f
3 changed files with 50 additions and 0 deletions
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17
target/i386/kvm/xen-emu.c
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@ -964,6 +964,18 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit *exit, X86CPU *cpu,
err = xen_evtchn_bind_vcpu_op(&vcpu);
break;
}
case EVTCHNOP_reset: {
struct evtchn_reset reset;
qemu_build_assert(sizeof(reset) == 2);
if (kvm_copy_from_gva(cs, arg, &reset, sizeof(reset))) {
err = -EFAULT;
break;
}
err = xen_evtchn_reset_op(&reset);
break;
}
default:
return false;
}
@ -981,6 +993,11 @@ int kvm_xen_soft_reset(void)
trace_kvm_xen_soft_reset();
err = xen_evtchn_soft_reset();
if (err) {
return err;
}
/*
* Zero is the reset/startup state for HVM_PARAM_CALLBACK_IRQ. Strictly,
* it maps to HVM_PARAM_CALLBACK_TYPE_GSI with GSI#0, but Xen refuses to