From: Ian Campbell <ian.campbell@citrix.com>
Date: Thu, 28 Jan 2016 11:43:44 +0000 (+0000)
Subject: libxendevicemodel: add lifecycle event callbacks
X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=4deb9a90907151d3e5c552fde93d35882804fb4f;p=people%2Fliuw%2Flibxenctrl-split%2Fxen.git

libxendevicemodel: add lifecycle event callbacks

These supercede xc_domain_shutdown and the only remaining uses of
xc_set_hvm_param in QEMU. Those will be removed in a later patch (so
as to not break bisectability of QEMU against Xen).

Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
---

diff --git a/tools/libs/devicemodel/core.c b/tools/libs/devicemodel/core.c
index 057ad219b5..361ea96604 100644
--- a/tools/libs/devicemodel/core.c
+++ b/tools/libs/devicemodel/core.c
@@ -85,6 +85,84 @@ int xendevicemodel_close(xendevicemodel_handle *dm)
     return rc;
 }
 
+static int shutdown_remote(xendevicemodel_handle *dm, int reason,
+                           const char *what)
+{
+    int ret = -1;
+    sched_remote_shutdown_t *arg;
+
+    arg = xencall_alloc_buffer(dm->call, sizeof(*arg));
+    if ( arg == NULL )
+    {
+        LOGE(ERROR, "unable to allocate memory for %s hypercall", what);
+        goto err;
+    }
+
+    arg->domain_id = dm->domid;
+    arg->reason = reason;
+    ret = xencall2(dm->call, __HYPERVISOR_sched_op,
+                   SCHEDOP_remote_shutdown,
+                   (uintptr_t)arg);
+
+    if ( ret )
+        LOGE(ERROR, "%s hypercall failed", what);
+
+    xencall_free_buffer(dm->call, arg);
+
+ err:
+    return ret;
+}
+
+int xendevicemodel_shutdown(xendevicemodel_handle *dm)
+{
+    return shutdown_remote(dm, SHUTDOWN_poweroff, "shutdown");
+}
+
+int xendevicemodel_reboot(xendevicemodel_handle *dm)
+{
+    return shutdown_remote(dm, SHUTDOWN_reboot, "reboot");
+}
+
+static int set_s3_state(xendevicemodel_handle *dm, int state,
+                        const char *what)
+{
+    xen_hvm_param_t *arg;
+    int ret = -1;
+
+    arg = xencall_alloc_buffer(dm->call, sizeof(*arg));
+    if ( arg == NULL )
+    {
+        LOGE(ERROR, "unable to allocate memory for %s hypercall", what);
+        goto err;
+    }
+
+    arg->domid = dm->domid;
+    arg->index = HVM_PARAM_ACPI_S_STATE;
+    arg->value = state;
+
+    ret = xencall2(dm->call, __HYPERVISOR_hvm_op,
+                   HVMOP_set_param, (uintptr_t)arg);
+
+    if ( ret )
+        LOGE(ERROR, "%s hypercall failed", what);
+
+    xencall_free_buffer(dm->call, arg);
+
+ err:
+    return ret;
+}
+
+int xendevicemodel_s3_suspend(xendevicemodel_handle *dm)
+{
+    return set_s3_state(dm, 3, "s3 suspend");
+}
+
+int xendevicemodel_s3_awaken(xendevicemodel_handle *dm)
+{
+    return set_s3_state(dm, 0, "s3 awaken");
+}
+
+
 /*
  * Local variables:
  * mode: C
diff --git a/tools/libs/devicemodel/include/xendevicemodel.h b/tools/libs/devicemodel/include/xendevicemodel.h
index bcfba4174c..331e6e42b8 100644
--- a/tools/libs/devicemodel/include/xendevicemodel.h
+++ b/tools/libs/devicemodel/include/xendevicemodel.h
@@ -68,6 +68,21 @@ xendevicemodel_handle *xendevicemodel_open(struct xentoollog_logger *logger,
  */
 int xendevicemodel_close(xendevicemodel_handle *dm);
 
+/*
+ * Indicate domain lifecycle changes to the hypervisor.
+ *
+ * shutdown, reboot and s3_suspend indicate to the hypervisor that
+ * emulation has resulted in the given guest behaviour.
+ *
+ * s3_awaken indicates that some event has woken the guest from S3.
+ *
+ * All functions log on failure.
+ */
+int xendevicemodel_shutdown(xendevicemodel_handle *dm);
+int xendevicemodel_reboot(xendevicemodel_handle *dm);
+int xendevicemodel_s3_suspend(xendevicemodel_handle *dm);
+int xendevicemodel_s3_awaken(xendevicemodel_handle *dm);
+
 #endif
 /*
  * Local variables:
diff --git a/tools/libs/devicemodel/libxendevicemodel.map b/tools/libs/devicemodel/libxendevicemodel.map
index 980c429425..1c3d93a372 100644
--- a/tools/libs/devicemodel/libxendevicemodel.map
+++ b/tools/libs/devicemodel/libxendevicemodel.map
@@ -2,5 +2,11 @@ VERS_1.0 {
 	global:
 		xendevicemodel_open;
 		xendevicemodel_close;
+
+		xendevicemodel_shutdown;
+		xendevicemodel_reboot;
+		xendevicemodel_s3_suspend;
+		xendevicemodel_s3_awaken;
+
 	local: *; /* Do not expose anything by default */
 };
diff --git a/tools/libs/devicemodel/private.h b/tools/libs/devicemodel/private.h
index b1f40c2861..93cf2ed48d 100644
--- a/tools/libs/devicemodel/private.h
+++ b/tools/libs/devicemodel/private.h
@@ -6,6 +6,9 @@
 #include <xendevicemodel.h>
 #include <xencall.h>
 
+#include <xen/sched.h>
+#include <xen/hvm/params.h>
+
 struct xendevicemodel_handle {
     xentoollog_logger *logger, *logger_tofree;
     unsigned flags;