i386/xen: add monitor commands to test event injection

Specifically add listing, injection of event channels.

Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>

diff --git a/hmp-commands.hx b/hmp-commands.hx
index 673e39a69797b8418c421b622934a86c86943ee5..fd77c432c0475010370b66a873fb6f959ee8d9b4 100644 (file)
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1815,3 +1815,32 @@ SRST
   Dump the FDT in dtb format to *filename*.
 ERST
 #endif
+
+#if defined(CONFIG_XEN_EMU)
+    {
+        .name       = "xen-event-inject",
+        .args_type  = "port:i",
+        .params     = "port",
+        .help       = "inject event channel",
+        .cmd        = hmp_xen_event_inject,
+    },
+
+SRST
+``xen-event-inject`` *port*
+  Notify guest via event channel on port *port*.
+ERST
+
+
+    {
+        .name       = "xen-event-list",
+        .args_type  = "",
+        .params     = "",
+        .help       = "list event channel state",
+        .cmd        = hmp_xen_event_list,
+    },
+
+SRST
+``xen-event-list``
+  List event channels in the guest
+ERST
+#endif

diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index cdf7d86da822969c33d877cf811e0ebeea0f34f5..87136334f55aa46ee57ee69c81aeb513ee208b84 100644 (file)
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -19,6 +19,8 @@
 #include "exec/target_page.h"
 #include "exec/address-spaces.h"
 #include "migration/vmstate.h"
+#include "monitor/monitor.h"
+#include "qapi/qmp/qdict.h"
 
 #include "hw/sysbus.h"
 #include "hw/xen/xen.h"
@@ -1061,3 +1063,84 @@ int xen_evtchn_send_op(struct evtchn_send *send)
     return ret;
 }
 
+static const char *type_names[] = {
+    "closed",
+    "unbound",
+    "interdomain",
+    "pirq",
+    "virq",
+    "ipi"
+};
+
+void hmp_xen_event_list(Monitor *mon, const QDict *qdict)
+{
+    XenEvtchnState *s = xen_evtchn_singleton;
+    void *shinfo, *pending, *mask;
+    int i;
+
+    if (!s) {
+        monitor_printf(mon, "Xen event channel emulation not enabled\n");
+        return;
+    }
+
+    shinfo = xen_overlay_get_shinfo_ptr();
+    if (!shinfo) {
+        monitor_printf(mon, "Xen shared info page not allocated\n");
+        return;
+    }
+    if (xen_is_long_mode()) {
+        pending = shinfo + offsetof(struct shared_info, evtchn_pending);
+        mask = shinfo + offsetof(struct shared_info, evtchn_mask);
+    } else {
+        pending = shinfo + offsetof(struct compat_shared_info, evtchn_pending);
+        mask = shinfo + offsetof(struct compat_shared_info, evtchn_mask);
+    }
+
+    qemu_mutex_lock(&s->port_lock);
+
+    for (i = 0; i < s->nr_ports; i++) {
+        XenEvtchnPort *p = &s->port_table[i];
+
+        if (p->type == EVTCHNSTAT_closed) {
+            continue;
+        }
+
+        monitor_printf(mon, "port %4u %s/%d vcpu:%d pending:%d mask:%d\n", i,
+                       type_names[p->type], p->type_val, p->vcpu,
+                       test_bit(i, pending), test_bit(i, mask));
+    }
+
+    qemu_mutex_unlock(&s->port_lock);
+}
+
+void hmp_xen_event_inject(Monitor *mon, const QDict *qdict)
+{
+    XenEvtchnState *s = xen_evtchn_singleton;
+    int port = qdict_get_int(qdict, "port");
+    XenEvtchnPort *p;
+
+    if (!s) {
+        monitor_printf(mon, "Xen event channel emulation not enabled\n");
+        return;
+    }
+
+    if (!valid_port(port)) {
+        monitor_printf(mon, "Invalid port %d\n", port);
+        return;
+    }
+    p = &s->port_table[port];
+
+    qemu_mutex_lock(&s->port_lock);
+
+    monitor_printf(mon, "port %4u %s/%d vcpu:%d\n", port,
+                   type_names[p->type], p->type_val, p->vcpu);
+
+    if (set_port_pending(s, port)) {
+        monitor_printf(mon, "Failed to set port %d\n", port);
+    } else {
+        monitor_printf(mon, "Delivered port %d\n", port);
+    }
+
+    qemu_mutex_unlock(&s->port_lock);
+}
+

diff --git a/hw/i386/kvm/xen_evtchn.h b/hw/i386/kvm/xen_evtchn.h
index 5d3e03553f3458d4fa95f59580e976673cdbd2e5..1de53daa52d708b13747324a852beeeae8778336 100644 (file)
--- a/hw/i386/kvm/xen_evtchn.h
+++ b/hw/i386/kvm/xen_evtchn.h
@@ -16,6 +16,9 @@ void xen_evtchn_create(void);
 int xen_evtchn_soft_reset(void);
 int xen_evtchn_set_callback_param(uint64_t param);
 
+void hmp_xen_event_list(Monitor *mon, const QDict *qdict);
+void hmp_xen_event_inject(Monitor *mon, const QDict *qdict);
+
 struct evtchn_status;
 struct evtchn_close;
 struct evtchn_unmask;

diff --git a/monitor/misc.c b/monitor/misc.c
index bf3f1c67ca4c3004cd1a626c514cc5a79b95bb31..7d8c473ffb5653f42b495674b2f0d1f2029c732c 100644 (file)
--- a/monitor/misc.c
+++ b/monitor/misc.c
@@ -82,6 +82,10 @@
 /* Make devices configuration available for use in hmp-commands*.hx templates */
 #include CONFIG_DEVICES
 
+#ifdef CONFIG_XEN_EMU
+#include "hw/i386/kvm/xen_evtchn.h"
+#endif
+
 /* file descriptors passed via SCM_RIGHTS */
 typedef struct mon_fd_t mon_fd_t;
 struct mon_fd_t {