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authorJoao Martins <joao.m.martins@oracle.com>2018-08-21 12:16:19 -0400
committerDavid Woodhouse <dwmw@amazon.co.uk>2023-03-01 08:22:50 +0000
commit507cb64d6e66d672bfddb275fe746241e0ed8db2 (patch)
tree4a45cf6af82dcfed99dfc60f2fa2af7b8e189d08 /hw/i386
parenta15b10978fe62411936e577288f28184a41754a9 (diff)
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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> Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Paul Durrant <paul@xen.org>
Diffstat (limited to 'hw/i386')
-rw-r--r--hw/i386/kvm/meson.build7
-rw-r--r--hw/i386/kvm/xen-stubs.c28
-rw-r--r--hw/i386/kvm/xen_evtchn.c137
3 files changed, 172 insertions, 0 deletions
diff --git a/hw/i386/kvm/meson.build b/hw/i386/kvm/meson.build
index cab64df..325c901 100644
--- a/hw/i386/kvm/meson.build
+++ b/hw/i386/kvm/meson.build
@@ -10,3 +10,10 @@ i386_kvm_ss.add(when: 'CONFIG_XEN_EMU', if_true: files(
))
i386_ss.add_all(when: 'CONFIG_KVM', if_true: i386_kvm_ss)
+
+xen_stubs_ss = ss.source_set()
+xen_stubs_ss.add(when: 'CONFIG_XEN_EMU', if_false: files(
+ 'xen-stubs.c',
+))
+
+specific_ss.add_all(when: 'CONFIG_SOFTMMU', if_true: xen_stubs_ss)
diff --git a/hw/i386/kvm/xen-stubs.c b/hw/i386/kvm/xen-stubs.c
new file mode 100644
index 0000000..720590a
--- /dev/null
+++ b/hw/i386/kvm/xen-stubs.c
@@ -0,0 +1,28 @@
+/*
+ * QEMU Xen emulation: QMP stubs
+ *
+ * Copyright © 2023 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+ *
+ * Authors: David Woodhouse <dwmw2@infradead.org>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+
+#include "qapi/error.h"
+#include "qapi/qapi-commands-misc-target.h"
+
+#ifdef TARGET_I386
+EvtchnInfoList *qmp_xen_event_list(Error **errp)
+{
+ error_setg(errp, "Xen event channel emulation not enabled");
+ return NULL;
+}
+
+void qmp_xen_event_inject(uint32_t port, Error **errp)
+{
+ error_setg(errp, "Xen event channel emulation not enabled");
+}
+#endif
diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c
index c804a31..e937de7 100644
--- a/hw/i386/kvm/xen_evtchn.c
+++ b/hw/i386/kvm/xen_evtchn.c
@@ -15,7 +15,11 @@
#include "qemu/lockable.h"
#include "qemu/main-loop.h"
#include "qemu/log.h"
+#include "monitor/monitor.h"
+#include "monitor/hmp.h"
#include "qapi/error.h"
+#include "qapi/qapi-commands-misc-target.h"
+#include "qapi/qmp/qdict.h"
#include "qom/object.h"
#include "exec/target_page.h"
#include "exec/address-spaces.h"
@@ -1069,3 +1073,136 @@ int xen_evtchn_send_op(struct evtchn_send *send)
return ret;
}
+EvtchnInfoList *qmp_xen_event_list(Error **errp)
+{
+ XenEvtchnState *s = xen_evtchn_singleton;
+ EvtchnInfoList *head = NULL, **tail = &head;
+ void *shinfo, *pending, *mask;
+ int i;
+
+ if (!s) {
+ error_setg(errp, "Xen event channel emulation not enabled");
+ return NULL;
+ }
+
+ shinfo = xen_overlay_get_shinfo_ptr();
+ if (!shinfo) {
+ error_setg(errp, "Xen shared info page not allocated");
+ return NULL;
+ }
+
+ 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_LOCK_GUARD(&s->port_lock);
+
+ for (i = 0; i < s->nr_ports; i++) {
+ XenEvtchnPort *p = &s->port_table[i];
+ EvtchnInfo *info;
+
+ if (p->type == EVTCHNSTAT_closed) {
+ continue;
+ }
+
+ info = g_new0(EvtchnInfo, 1);
+
+ info->port = i;
+ qemu_build_assert(EVTCHN_PORT_TYPE_CLOSED == EVTCHNSTAT_closed);
+ qemu_build_assert(EVTCHN_PORT_TYPE_UNBOUND == EVTCHNSTAT_unbound);
+ qemu_build_assert(EVTCHN_PORT_TYPE_INTERDOMAIN == EVTCHNSTAT_interdomain);
+ qemu_build_assert(EVTCHN_PORT_TYPE_PIRQ == EVTCHNSTAT_pirq);
+ qemu_build_assert(EVTCHN_PORT_TYPE_VIRQ == EVTCHNSTAT_virq);
+ qemu_build_assert(EVTCHN_PORT_TYPE_IPI == EVTCHNSTAT_ipi);
+
+ info->type = p->type;
+ if (p->type == EVTCHNSTAT_interdomain) {
+ info->remote_domain = g_strdup((p->type_val & PORT_INFO_TYPEVAL_REMOTE_QEMU) ?
+ "qemu" : "loopback");
+ info->target = p->type_val & PORT_INFO_TYPEVAL_REMOTE_PORT_MASK;
+ } else {
+ info->target = p->type_val;
+ }
+ info->vcpu = p->vcpu;
+ info->pending = test_bit(i, pending);
+ info->masked = test_bit(i, mask);
+
+ QAPI_LIST_APPEND(tail, info);
+ }
+
+ return head;
+}
+
+void qmp_xen_event_inject(uint32_t port, Error **errp)
+{
+ XenEvtchnState *s = xen_evtchn_singleton;
+
+ if (!s) {
+ error_setg(errp, "Xen event channel emulation not enabled");
+ return;
+ }
+
+ if (!valid_port(port)) {
+ error_setg(errp, "Invalid port %u", port);
+ }
+
+ QEMU_LOCK_GUARD(&s->port_lock);
+
+ if (set_port_pending(s, port)) {
+ error_setg(errp, "Failed to set port %u", port);
+ return;
+ }
+}
+
+void hmp_xen_event_list(Monitor *mon, const QDict *qdict)
+{
+ EvtchnInfoList *iter, *info_list;
+ Error *err = NULL;
+
+ info_list = qmp_xen_event_list(&err);
+ if (err) {
+ hmp_handle_error(mon, err);
+ return;
+ }
+
+ for (iter = info_list; iter; iter = iter->next) {
+ EvtchnInfo *info = iter->value;
+
+ monitor_printf(mon, "port %4u: vcpu: %d %s", info->port, info->vcpu,
+ EvtchnPortType_str(info->type));
+ if (info->type != EVTCHN_PORT_TYPE_IPI) {
+ monitor_printf(mon, "(");
+ if (info->remote_domain) {
+ monitor_printf(mon, "%s:", info->remote_domain);
+ }
+ monitor_printf(mon, "%d)", info->target);
+ }
+ if (info->pending) {
+ monitor_printf(mon, " PENDING");
+ }
+ if (info->masked) {
+ monitor_printf(mon, " MASKED");
+ }
+ monitor_printf(mon, "\n");
+ }
+
+ qapi_free_EvtchnInfoList(info_list);
+}
+
+void hmp_xen_event_inject(Monitor *mon, const QDict *qdict)
+{
+ int port = qdict_get_int(qdict, "port");
+ Error *err = NULL;
+
+ qmp_xen_event_inject(port, &err);
+ if (err) {
+ hmp_handle_error(mon, err);
+ } else {
+ monitor_printf(mon, "Delivered port %d\n", port);
+ }
+}
+