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authorfishsoupisgood <github@madingley.org>2019-04-29 01:17:54 +0100
committerfishsoupisgood <github@madingley.org>2019-05-27 03:43:43 +0100
commit3f2546b2ef55b661fd8dd69682b38992225e86f6 (patch)
tree65ca85f13617aee1dce474596800950f266a456c /xen-common.c
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Initial import of qemu-2.4.1HEADmaster
Diffstat (limited to 'xen-common.c')
-rw-r--r--xen-common.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/xen-common.c b/xen-common.c
new file mode 100644
index 00000000..0dcdbc39
--- /dev/null
+++ b/xen-common.c
@@ -0,0 +1,151 @@
+/*
+ * Copyright (C) 2014 Citrix Systems UK Ltd.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#include "hw/xen/xen_backend.h"
+#include "qmp-commands.h"
+#include "sysemu/char.h"
+#include "sysemu/accel.h"
+#include "migration/migration.h"
+
+//#define DEBUG_XEN
+
+#ifdef DEBUG_XEN
+#define DPRINTF(fmt, ...) \
+ do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
+#else
+#define DPRINTF(fmt, ...) \
+ do { } while (0)
+#endif
+
+static int store_dev_info(int domid, CharDriverState *cs, const char *string)
+{
+ struct xs_handle *xs = NULL;
+ char *path = NULL;
+ char *newpath = NULL;
+ char *pts = NULL;
+ int ret = -1;
+
+ /* Only continue if we're talking to a pty. */
+ if (strncmp(cs->filename, "pty:", 4)) {
+ return 0;
+ }
+ pts = cs->filename + 4;
+
+ /* We now have everything we need to set the xenstore entry. */
+ xs = xs_open(0);
+ if (xs == NULL) {
+ fprintf(stderr, "Could not contact XenStore\n");
+ goto out;
+ }
+
+ path = xs_get_domain_path(xs, domid);
+ if (path == NULL) {
+ fprintf(stderr, "xs_get_domain_path() error\n");
+ goto out;
+ }
+ newpath = realloc(path, (strlen(path) + strlen(string) +
+ strlen("/tty") + 1));
+ if (newpath == NULL) {
+ fprintf(stderr, "realloc error\n");
+ goto out;
+ }
+ path = newpath;
+
+ strcat(path, string);
+ strcat(path, "/tty");
+ if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
+ fprintf(stderr, "xs_write for '%s' fail", string);
+ goto out;
+ }
+ ret = 0;
+
+out:
+ free(path);
+ xs_close(xs);
+
+ return ret;
+}
+
+void xenstore_store_pv_console_info(int i, CharDriverState *chr)
+{
+ if (i == 0) {
+ store_dev_info(xen_domid, chr, "/console");
+ } else {
+ char buf[32];
+ snprintf(buf, sizeof(buf), "/device/console/%d", i);
+ store_dev_info(xen_domid, chr, buf);
+ }
+}
+
+
+static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
+{
+ char path[50];
+
+ if (xs == NULL) {
+ fprintf(stderr, "xenstore connection not initialized\n");
+ exit(1);
+ }
+
+ snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
+ if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
+ fprintf(stderr, "error recording dm state\n");
+ exit(1);
+ }
+}
+
+
+static void xen_change_state_handler(void *opaque, int running,
+ RunState state)
+{
+ if (running) {
+ /* record state running */
+ xenstore_record_dm_state(xenstore, "running");
+ }
+}
+
+static int xen_init(MachineState *ms)
+{
+ xen_xc = xen_xc_interface_open(0, 0, 0);
+ if (xen_xc == XC_HANDLER_INITIAL_VALUE) {
+ xen_be_printf(NULL, 0, "can't open xen interface\n");
+ return -1;
+ }
+ qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
+
+ global_state_set_optional();
+ savevm_skip_configuration();
+ savevm_skip_section_footers();
+
+ return 0;
+}
+
+static void xen_accel_class_init(ObjectClass *oc, void *data)
+{
+ AccelClass *ac = ACCEL_CLASS(oc);
+ ac->name = "Xen";
+ ac->init_machine = xen_init;
+ ac->allowed = &xen_allowed;
+}
+
+#define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
+
+static const TypeInfo xen_accel_type = {
+ .name = TYPE_XEN_ACCEL,
+ .parent = TYPE_ACCEL,
+ .class_init = xen_accel_class_init,
+};
+
+static void xen_type_init(void)
+{
+ type_register_static(&xen_accel_type);
+}
+
+type_init(xen_type_init);