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[PATCH v10 35/59] hw/xen: Implement EVTCHNOP_alloc_unbound
From: |
David Woodhouse |
Subject: |
[PATCH v10 35/59] hw/xen: Implement EVTCHNOP_alloc_unbound |
Date: |
Wed, 1 Feb 2023 14:31:24 +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 a97d6ba61d..9dc5a98d94 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -835,6 +835,38 @@ 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 5299614d3c..e186dec9a9 100644
--- a/target/i386/kvm/xen-emu.c
+++ b/target/i386/kvm/xen-emu.c
@@ -918,6 +918,21 @@ 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;
}
--
2.39.0
- Re: [PATCH v10 33/59] hw/xen: Implement EVTCHNOP_bind_ipi, (continued)
[PATCH v10 38/59] hw/xen: Implement EVTCHNOP_reset, David Woodhouse, 2023/02/01
[PATCH v10 11/59] i386/xen: implement HYPERVISOR_sched_op, SCHEDOP_shutdown, David Woodhouse, 2023/02/01
[PATCH v10 26/59] i386/xen: implement HVMOP_set_param, David Woodhouse, 2023/02/01
[PATCH v10 16/59] i386/xen: manage and save/restore Xen guest long_mode setting, David Woodhouse, 2023/02/01
[PATCH v10 12/59] i386/xen: Implement SCHEDOP_poll and SCHEDOP_yield, David Woodhouse, 2023/02/01
[PATCH v10 09/59] i386/xen: handle guest hypercalls, David Woodhouse, 2023/02/01
[PATCH v10 35/59] hw/xen: Implement EVTCHNOP_alloc_unbound,
David Woodhouse <=
[PATCH v10 51/59] hw/xen: Add xen_xenstore device for xenstore emulation, David Woodhouse, 2023/02/01
[PATCH v10 47/59] i386/xen: handle PV timer hypercalls, David Woodhouse, 2023/02/01
[PATCH v10 02/59] xen: add CONFIG_XEN_BUS and CONFIG_XEN_EMU options for Xen emulation, David Woodhouse, 2023/02/01