0d15da8e6f
Today, all accelerator init functions affect some global state: * tcg_init() calls tcg_exec_init() and affects globals such as tcg_tcx, page size globals, and possibly others; * kvm_init() changes the kvm_state global, cpu_interrupt_handler, and possibly others; * xen_init() changes the xen_xc global, and registers a change state handler. With the new accelerator QOM classes, initialization may now be split in two steps: * instance_init() will do basic initialization that doesn't affect any global state and don't need MachineState or MachineClass data. This will allow probing code to safely create multiple accelerator objects on the fly just for reporting host/accelerator capabilities, for example. * accel_init_machine()/init_machine() will save the accelerator object in MachineState, and do initialization steps which still affect global state, machine state, or that need data from MachineClass or MachineState. To clarify the difference between those two steps, rename init() to init_machine(). Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
147 lines
3.5 KiB
C
147 lines
3.5 KiB
C
/*
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* Copyright (C) 2014 Citrix Systems UK Ltd.
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*
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* This work is licensed under the terms of the GNU GPL, version 2. See
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* the COPYING file in the top-level directory.
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*
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* Contributions after 2012-01-13 are licensed under the terms of the
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* GNU GPL, version 2 or (at your option) any later version.
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*/
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#include "hw/xen/xen_backend.h"
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#include "qmp-commands.h"
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#include "sysemu/char.h"
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#include "sysemu/accel.h"
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//#define DEBUG_XEN
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#ifdef DEBUG_XEN
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#define DPRINTF(fmt, ...) \
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do { fprintf(stderr, "xen: " fmt, ## __VA_ARGS__); } while (0)
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#else
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#define DPRINTF(fmt, ...) \
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do { } while (0)
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#endif
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static int store_dev_info(int domid, CharDriverState *cs, const char *string)
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{
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struct xs_handle *xs = NULL;
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char *path = NULL;
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char *newpath = NULL;
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char *pts = NULL;
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int ret = -1;
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/* Only continue if we're talking to a pty. */
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if (strncmp(cs->filename, "pty:", 4)) {
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return 0;
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}
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pts = cs->filename + 4;
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/* We now have everything we need to set the xenstore entry. */
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xs = xs_open(0);
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if (xs == NULL) {
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fprintf(stderr, "Could not contact XenStore\n");
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goto out;
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}
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path = xs_get_domain_path(xs, domid);
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if (path == NULL) {
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fprintf(stderr, "xs_get_domain_path() error\n");
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goto out;
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}
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newpath = realloc(path, (strlen(path) + strlen(string) +
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strlen("/tty") + 1));
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if (newpath == NULL) {
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fprintf(stderr, "realloc error\n");
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goto out;
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}
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path = newpath;
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strcat(path, string);
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strcat(path, "/tty");
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if (!xs_write(xs, XBT_NULL, path, pts, strlen(pts))) {
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fprintf(stderr, "xs_write for '%s' fail", string);
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goto out;
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}
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ret = 0;
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out:
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free(path);
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xs_close(xs);
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return ret;
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}
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void xenstore_store_pv_console_info(int i, CharDriverState *chr)
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{
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if (i == 0) {
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store_dev_info(xen_domid, chr, "/console");
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} else {
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char buf[32];
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snprintf(buf, sizeof(buf), "/device/console/%d", i);
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store_dev_info(xen_domid, chr, buf);
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}
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}
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static void xenstore_record_dm_state(struct xs_handle *xs, const char *state)
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{
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char path[50];
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if (xs == NULL) {
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fprintf(stderr, "xenstore connection not initialized\n");
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exit(1);
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}
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snprintf(path, sizeof (path), "device-model/%u/state", xen_domid);
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if (!xs_write(xs, XBT_NULL, path, state, strlen(state))) {
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fprintf(stderr, "error recording dm state\n");
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exit(1);
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}
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}
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static void xen_change_state_handler(void *opaque, int running,
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RunState state)
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{
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if (running) {
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/* record state running */
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xenstore_record_dm_state(xenstore, "running");
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}
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}
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static int xen_init(MachineClass *mc)
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{
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xen_xc = xen_xc_interface_open(0, 0, 0);
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if (xen_xc == XC_HANDLER_INITIAL_VALUE) {
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xen_be_printf(NULL, 0, "can't open xen interface\n");
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return -1;
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}
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qemu_add_vm_change_state_handler(xen_change_state_handler, NULL);
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return 0;
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}
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static void xen_accel_class_init(ObjectClass *oc, void *data)
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{
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AccelClass *ac = ACCEL_CLASS(oc);
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ac->name = "Xen";
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ac->init_machine = xen_init;
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ac->allowed = &xen_allowed;
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}
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#define TYPE_XEN_ACCEL ACCEL_CLASS_NAME("xen")
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static const TypeInfo xen_accel_type = {
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.name = TYPE_XEN_ACCEL,
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.parent = TYPE_ACCEL,
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.class_init = xen_accel_class_init,
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};
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static void xen_type_init(void)
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{
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type_register_static(&xen_accel_type);
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}
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type_init(xen_type_init);
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