238 lines
6 KiB
C
238 lines
6 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 "qemu/osdep.h"
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#include "qemu/error-report.h"
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#include "qemu/module.h"
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#include "qapi/error.h"
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#include "hw/xen/xen-legacy-backend.h"
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#include "hw/xen/xen_pt.h"
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#include "chardev/char.h"
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#include "qemu/accel.h"
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#include "sysemu/cpus.h"
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#include "sysemu/xen.h"
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#include "sysemu/runstate.h"
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#include "migration/misc.h"
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#include "migration/global_state.h"
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#include "hw/boards.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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bool xen_allowed;
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xc_interface *xen_xc;
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xenforeignmemory_handle *xen_fmem;
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xendevicemodel_handle *xen_dmod;
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static int store_dev_info(int domid, Chardev *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 (!CHARDEV_IS_PTY(cs)) {
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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, Chardev *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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error_report("xenstore connection not initialized");
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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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/*
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* This call may fail when running restricted so don't make it fatal in
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* that case. Toolstacks should instead use QMP to listen for state changes.
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*/
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if (!xs_write(xs, XBT_NULL, path, state, strlen(state)) &&
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!xen_domid_restrict) {
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error_report("error recording dm state");
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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, bool 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 bool xen_get_igd_gfx_passthru(Object *obj, Error **errp)
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{
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return xen_igd_gfx_pt_enabled();
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}
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static void xen_set_igd_gfx_passthru(Object *obj, bool value, Error **errp)
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{
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xen_igd_gfx_pt_set(value, errp);
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}
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static void xen_setup_post(MachineState *ms, AccelState *accel)
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{
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int rc;
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if (xen_domid_restrict) {
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rc = xen_restrict(xen_domid);
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if (rc < 0) {
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perror("xen: failed to restrict");
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exit(1);
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}
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}
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}
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static int xen_init(MachineState *ms)
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{
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MachineClass *mc = MACHINE_GET_CLASS(ms);
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xen_xc = xc_interface_open(0, 0, 0);
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if (xen_xc == NULL) {
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xen_pv_printf(NULL, 0, "can't open xen interface\n");
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return -1;
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}
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xen_fmem = xenforeignmemory_open(0, 0);
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if (xen_fmem == NULL) {
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xen_pv_printf(NULL, 0, "can't open xen fmem interface\n");
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xc_interface_close(xen_xc);
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return -1;
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}
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xen_dmod = xendevicemodel_open(0, 0);
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if (xen_dmod == NULL) {
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xen_pv_printf(NULL, 0, "can't open xen devicemodel interface\n");
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xenforeignmemory_close(xen_fmem);
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xc_interface_close(xen_xc);
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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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/*
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* opt out of system RAM being allocated by generic code
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*/
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mc->default_ram_id = 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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static GlobalProperty compat[] = {
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{ "migration", "store-global-state", "off" },
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{ "migration", "send-configuration", "off" },
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{ "migration", "send-section-footer", "off" },
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};
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ac->name = "Xen";
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ac->init_machine = xen_init;
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ac->setup_post = xen_setup_post;
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ac->allowed = &xen_allowed;
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ac->compat_props = g_ptr_array_new();
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compat_props_add(ac->compat_props, compat, G_N_ELEMENTS(compat));
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object_class_property_add_bool(oc, "igd-passthru",
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xen_get_igd_gfx_passthru, xen_set_igd_gfx_passthru);
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object_class_property_set_description(oc, "igd-passthru",
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"Set on/off to enable/disable igd passthrou");
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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_accel_ops_class_init(ObjectClass *oc, void *data)
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{
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AccelOpsClass *ops = ACCEL_OPS_CLASS(oc);
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ops->create_vcpu_thread = dummy_start_vcpu_thread;
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}
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static const TypeInfo xen_accel_ops_type = {
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.name = ACCEL_OPS_NAME("xen"),
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.parent = TYPE_ACCEL_OPS,
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.class_init = xen_accel_ops_class_init,
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.abstract = true,
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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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type_register_static(&xen_accel_ops_type);
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}
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type_init(xen_type_init);
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