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[PATCH v6 34/51] hw/xen: Implement EVTCHNOP_alloc_unbound
From: |
David Woodhouse |
Subject: |
[PATCH v6 34/51] hw/xen: Implement EVTCHNOP_alloc_unbound |
Date: |
Tue, 10 Jan 2023 12:20:25 +0000 |
From: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
hw/i386/kvm/xen_evtchn.c | 32 ++++++++++++++++++++++++++++++++
hw/i386/kvm/xen_evtchn.h | 2 ++
target/i386/kvm/xen-emu.c | 15 +++++++++++++++
3 files changed, 49 insertions(+)
diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index 107249c48c..15c467ad7f 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -828,6 +828,38 @@ int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi)
return ret;
}
+int xen_evtchn_alloc_unbound_op(struct evtchn_alloc_unbound *alloc)
+{
+ XenEvtchnState *s = xen_evtchn_singleton;
+ uint16_t type_val;
+ int ret;
+
+ if (!s) {
+ return -ENOTSUP;
+ }
+
+ if (alloc->dom != DOMID_SELF && alloc->dom != xen_domid) {
+ return -ESRCH;
+ }
+
+ if (alloc->remote_dom == DOMID_QEMU) {
+ type_val = PORT_INFO_TYPEVAL_REMOTE_QEMU;
+ } else if (alloc->remote_dom == DOMID_SELF ||
+ alloc->remote_dom == xen_domid) {
+ type_val = 0;
+ } else {
+ return -EPERM;
+ }
+
+ qemu_mutex_lock(&s->port_lock);
+
+ ret = allocate_port(s, 0, EVTCHNSTAT_unbound, type_val, &alloc->port);
+
+ qemu_mutex_unlock(&s->port_lock);
+
+ return ret;
+}
+
int xen_evtchn_send_op(struct evtchn_send *send)
{
XenEvtchnState *s = xen_evtchn_singleton;
diff --git a/hw/i386/kvm/xen_evtchn.h b/hw/i386/kvm/xen_evtchn.h
index 500fdbe8b8..fc080138e3 100644
--- a/hw/i386/kvm/xen_evtchn.h
+++ b/hw/i386/kvm/xen_evtchn.h
@@ -21,11 +21,13 @@ struct evtchn_unmask;
struct evtchn_bind_virq;
struct evtchn_bind_ipi;
struct evtchn_send;
+struct evtchn_alloc_unbound;
int xen_evtchn_status_op(struct evtchn_status *status);
int xen_evtchn_close_op(struct evtchn_close *close);
int xen_evtchn_unmask_op(struct evtchn_unmask *unmask);
int xen_evtchn_bind_virq_op(struct evtchn_bind_virq *virq);
int xen_evtchn_bind_ipi_op(struct evtchn_bind_ipi *ipi);
int xen_evtchn_send_op(struct evtchn_send *send);
+int xen_evtchn_alloc_unbound_op(struct evtchn_alloc_unbound *alloc);
#endif /* QEMU_XEN_EVTCHN_H */
diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c
index 3bb7026ffb..0787fed494 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -907,6 +907,21 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit
*exit, X86CPU *cpu,
err = xen_evtchn_send_op(&send);
break;
}
+ case EVTCHNOP_alloc_unbound: {
+ struct evtchn_alloc_unbound alloc;
+
+ qemu_build_assert(sizeof(alloc) == 8);
+ if (kvm_copy_from_gva(cs, arg, &alloc, sizeof(alloc))) {
+ err = -EFAULT;
+ break;
+ }
+
+ err = xen_evtchn_alloc_unbound_op(&alloc);
+ if (!err && kvm_copy_to_gva(cs, arg, &alloc, sizeof(alloc))) {
+ err = -EFAULT;
+ }
+ break;
+ }
default:
return false;
}
--
2.35.3
- [PATCH v6 00/51] Xen support under KVM, David Woodhouse, 2023/01/10
- [PATCH v6 42/51] hw/xen: Add xen_gnttab device for grant table emulation, David Woodhouse, 2023/01/10
- [PATCH v6 50/51] hw/xen: Add xen_xenstore device for xenstore emulation, David Woodhouse, 2023/01/10
- [PATCH v6 09/51] i386/xen: handle guest hypercalls, David Woodhouse, 2023/01/10
- [PATCH v6 34/51] hw/xen: Implement EVTCHNOP_alloc_unbound,
David Woodhouse <=
- [PATCH v6 21/51] i386/xen: handle VCPUOP_register_vcpu_time_info, David Woodhouse, 2023/01/10
- [PATCH v6 46/51] i386/xen: handle PV timer hypercalls, David Woodhouse, 2023/01/10
- [PATCH v6 26/51] hw/xen: Add xen_evtchn device for event channel emulation, David Woodhouse, 2023/01/10
- [PATCH v6 36/51] hw/xen: Implement EVTCHNOP_bind_vcpu, David Woodhouse, 2023/01/10
- [PATCH v6 24/51] i386/xen: implement HVMOP_set_evtchn_upcall_vector, David Woodhouse, 2023/01/10
- [PATCH v6 33/51] hw/xen: Implement EVTCHNOP_send, David Woodhouse, 2023/01/10
- [PATCH v6 48/51] i386/xen: handle HVMOP_get_param, David Woodhouse, 2023/01/10
- [PATCH v6 49/51] hw/xen: Add backend implementation of interdomain event channel support, David Woodhouse, 2023/01/10
- [PATCH v6 08/51] xen-platform: allow its creation with XEN_EMULATE mode, David Woodhouse, 2023/01/10