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hw/xen: Implement EVTCHNOP_status

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This adds the basic structure for maintaining the port table and reporting
the status of ports therein.

Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Reviewed-by: Paul Durrant <paul@xen.org>
This commit is contained in:
David Woodhouse 2022-12-13 13:29:46 +00:00
parent 27d4075dd8
commit 4858ba2065
3 changed files with 125 additions and 2 deletions
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20
target/i386/kvm/xen-emu.c
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@ -776,9 +776,10 @@ static bool kvm_xen_hcall_vcpu_op(struct kvm_xen_exit *exit, X86CPU *cpu,
return true;
}
static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit *exit,
static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit *exit, X86CPU *cpu,
int cmd, uint64_t arg)
{
CPUState *cs = CPU(cpu);
int err = -ENOSYS;
switch (cmd) {
@ -789,6 +790,21 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit *exit,
err = -ENOSYS;
break;
case EVTCHNOP_status: {
struct evtchn_status status;
qemu_build_assert(sizeof(status) == 24);
if (kvm_copy_from_gva(cs, arg, &status, sizeof(status))) {
err = -EFAULT;
break;
}
err = xen_evtchn_status_op(&status);
if (!err && kvm_copy_to_gva(cs, arg, &status, sizeof(status))) {
err = -EFAULT;
}
break;
}
default:
return false;
}
@ -914,7 +930,7 @@ static bool do_kvm_xen_handle_exit(X86CPU *cpu, struct kvm_xen_exit *exit)
return kvm_xen_hcall_sched_op(exit, cpu, exit->u.hcall.params[0],
exit->u.hcall.params[1]);
case __HYPERVISOR_event_channel_op:
return kvm_xen_hcall_evtchn_op(exit, exit->u.hcall.params[0],
return kvm_xen_hcall_evtchn_op(exit, cpu, exit->u.hcall.params[0],
exit->u.hcall.params[1]);
case __HYPERVISOR_vcpu_op:
return kvm_xen_hcall_vcpu_op(exit, cpu,