xen: move Xen PV machine files to hw/xenpv

Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

4 files changed, 423 insertions, 0 deletions

diff --git a/hw/xenpv/Makefile.objs b/hw/xenpv/Makefile.objs
new file mode 100644
index 0000000000..49f6e9e3c5
--- /dev/null
+++ b/hw/xenpv/Makefile.objs
@@ -0,0 +1,2 @@
+# Xen PV machine support
+obj-$(CONFIG_XEN) += xen_domainbuild.o xen_machine_pv.o
diff --git a/hw/xenpv/xen_domainbuild.c b/hw/xenpv/xen_domainbuild.c
new file mode 100644
index 0000000000..c0ab7537df
--- /dev/null
+++ b/hw/xenpv/xen_domainbuild.c
@@ -0,0 +1,299 @@
+#include <signal.h>
+#include "hw/xen/xen_backend.h"
+#include "xen_domainbuild.h"
+#include "qemu/timer.h"
+#include "qemu/log.h"
+
+#include <xenguest.h>
+
+static int xenstore_domain_mkdir(char *path)
+{
+    struct xs_permissions perms_ro[] = {{
+            .id    = 0, /* set owner: dom0 */
+        },{
+            .id    = xen_domid,
+            .perms = XS_PERM_READ,
+        }};
+    struct xs_permissions perms_rw[] = {{
+            .id    = 0, /* set owner: dom0 */
+        },{
+            .id    = xen_domid,
+            .perms = XS_PERM_READ | XS_PERM_WRITE,
+        }};
+    const char *writable[] = { "device", "control", "error", NULL };
+    char subpath[256];
+    int i;
+
+    if (!xs_mkdir(xenstore, 0, path)) {
+        fprintf(stderr, "%s: xs_mkdir %s: failed\n", __FUNCTION__, path);
+	return -1;
+    }
+    if (!xs_set_permissions(xenstore, 0, path, perms_ro, 2)) {
+        fprintf(stderr, "%s: xs_set_permissions failed\n", __FUNCTION__);
+	return -1;
+    }
+
+    for (i = 0; writable[i]; i++) {
+        snprintf(subpath, sizeof(subpath), "%s/%s", path, writable[i]);
+        if (!xs_mkdir(xenstore, 0, subpath)) {
+            fprintf(stderr, "%s: xs_mkdir %s: failed\n", __FUNCTION__, subpath);
+            return -1;
+        }
+        if (!xs_set_permissions(xenstore, 0, subpath, perms_rw, 2)) {
+            fprintf(stderr, "%s: xs_set_permissions failed\n", __FUNCTION__);
+            return -1;
+        }
+    }
+    return 0;
+}
+
+int xenstore_domain_init1(const char *kernel, const char *ramdisk,
+                          const char *cmdline)
+{
+    char *dom, uuid_string[42], vm[256], path[256];
+    int i;
+
+    snprintf(uuid_string, sizeof(uuid_string), UUID_FMT,
+             qemu_uuid[0], qemu_uuid[1], qemu_uuid[2], qemu_uuid[3],
+             qemu_uuid[4], qemu_uuid[5], qemu_uuid[6], qemu_uuid[7],
+             qemu_uuid[8], qemu_uuid[9], qemu_uuid[10], qemu_uuid[11],
+             qemu_uuid[12], qemu_uuid[13], qemu_uuid[14], qemu_uuid[15]);
+    dom = xs_get_domain_path(xenstore, xen_domid);
+    snprintf(vm,  sizeof(vm),  "/vm/%s", uuid_string);
+
+    xenstore_domain_mkdir(dom);
+
+    xenstore_write_str(vm, "image/ostype",  "linux");
+    if (kernel)
+        xenstore_write_str(vm, "image/kernel",  kernel);
+    if (ramdisk)
+        xenstore_write_str(vm, "image/ramdisk", ramdisk);
+    if (cmdline)
+        xenstore_write_str(vm, "image/cmdline", cmdline);
+
+    /* name + id */
+    xenstore_write_str(vm,  "name",   qemu_name ? qemu_name : "no-name");
+    xenstore_write_str(vm,  "uuid",   uuid_string);
+    xenstore_write_str(dom, "name",   qemu_name ? qemu_name : "no-name");
+    xenstore_write_int(dom, "domid",  xen_domid);
+    xenstore_write_str(dom, "vm",     vm);
+
+    /* memory */
+    xenstore_write_int(dom, "memory/target", ram_size >> 10);  // kB
+    xenstore_write_int(vm, "memory",         ram_size >> 20);  // MB
+    xenstore_write_int(vm, "maxmem",         ram_size >> 20);  // MB
+
+    /* cpus */
+    for (i = 0; i < smp_cpus; i++) {
+	snprintf(path, sizeof(path), "cpu/%d/availability",i);
+	xenstore_write_str(dom, path, "online");
+    }
+    xenstore_write_int(vm, "vcpu_avail",  smp_cpus);
+    xenstore_write_int(vm, "vcpus",       smp_cpus);
+
+    /* vnc password */
+    xenstore_write_str(vm, "vncpassword", "" /* FIXME */);
+
+    free(dom);
+    return 0;
+}
+
+int xenstore_domain_init2(int xenstore_port, int xenstore_mfn,
+                          int console_port, int console_mfn)
+{
+    char *dom;
+
+    dom = xs_get_domain_path(xenstore, xen_domid);
+
+    /* signal new domain */
+    xs_introduce_domain(xenstore,
+                        xen_domid,
+                        xenstore_mfn,
+                        xenstore_port);
+
+    /* xenstore */
+    xenstore_write_int(dom, "store/ring-ref",   xenstore_mfn);
+    xenstore_write_int(dom, "store/port",       xenstore_port);
+
+    /* console */
+    xenstore_write_str(dom, "console/type",     "ioemu");
+    xenstore_write_int(dom, "console/limit",    128 * 1024);
+    xenstore_write_int(dom, "console/ring-ref", console_mfn);
+    xenstore_write_int(dom, "console/port",     console_port);
+    xen_config_dev_console(0);
+
+    free(dom);
+    return 0;
+}
+
+/* ------------------------------------------------------------- */
+
+static QEMUTimer *xen_poll;
+
+/* check domain state once per second */
+static void xen_domain_poll(void *opaque)
+{
+    struct xc_dominfo info;
+    int rc;
+
+    rc = xc_domain_getinfo(xen_xc, xen_domid, 1, &info);
+    if ((rc != 1) || (info.domid != xen_domid)) {
+        qemu_log("xen: domain %d is gone\n", xen_domid);
+        goto quit;
+    }
+    if (info.dying) {
+        qemu_log("xen: domain %d is dying (%s%s)\n", xen_domid,
+                 info.crashed  ? "crashed"  : "",
+                 info.shutdown ? "shutdown" : "");
+        goto quit;
+    }
+
+    timer_mod(xen_poll, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 1000);
+    return;
+
+quit:
+    qemu_system_shutdown_request();
+}
+
+static int xen_domain_watcher(void)
+{
+    int qemu_running = 1;
+    int fd[2], i, n, rc;
+    char byte;
+
+    if (pipe(fd) != 0) {
+        qemu_log("%s: Huh? pipe error: %s\n", __FUNCTION__, strerror(errno));
+        return -1;
+    }
+    if (fork() != 0)
+        return 0; /* not child */
+
+    /* close all file handles, except stdio/out/err,
+     * our watch pipe and the xen interface handle */
+    n = getdtablesize();
+    for (i = 3; i < n; i++) {
+        if (i == fd[0])
+            continue;
+        if (i == xc_fd(xen_xc)) {
+            continue;
+        }
+        close(i);
+    }
+
+    /* ignore term signals */
+    signal(SIGINT,  SIG_IGN);
+    signal(SIGTERM, SIG_IGN);
+
+    /* wait for qemu exiting */
+    while (qemu_running) {
+        rc = read(fd[0], &byte, 1);
+        switch (rc) {
+        case -1:
+            if (errno == EINTR)
+                continue;
+            qemu_log("%s: Huh? read error: %s\n", __FUNCTION__, strerror(errno));
+            qemu_running = 0;
+            break;
+        case 0:
+            /* EOF -> qemu exited */
+            qemu_running = 0;
+            break;
+        default:
+            qemu_log("%s: Huh? data on the watch pipe?\n", __FUNCTION__);
+            break;
+        }
+    }
+
+    /* cleanup */
+    qemu_log("%s: destroy domain %d\n", __FUNCTION__, xen_domid);
+    xc_domain_destroy(xen_xc, xen_domid);
+    _exit(0);
+}
+
+/* normal cleanup */
+static void xen_domain_cleanup(void)
+{
+    char *dom;
+
+    dom = xs_get_domain_path(xenstore, xen_domid);
+    if (dom) {
+        xs_rm(xenstore, 0, dom);
+        free(dom);
+    }
+    xs_release_domain(xenstore, xen_domid);
+}
+
+int xen_domain_build_pv(const char *kernel, const char *ramdisk,
+                        const char *cmdline)
+{
+    uint32_t ssidref = 0;
+    uint32_t flags = 0;
+    xen_domain_handle_t uuid;
+    unsigned int xenstore_port = 0, console_port = 0;
+    unsigned long xenstore_mfn = 0, console_mfn = 0;
+    int rc;
+
+    memcpy(uuid, qemu_uuid, sizeof(uuid));
+    rc = xc_domain_create(xen_xc, ssidref, uuid, flags, &xen_domid);
+    if (rc < 0) {
+        fprintf(stderr, "xen: xc_domain_create() failed\n");
+        goto err;
+    }
+    qemu_log("xen: created domain %d\n", xen_domid);
+    atexit(xen_domain_cleanup);
+    if (xen_domain_watcher() == -1) {
+        goto err;
+    }
+
+    xenstore_domain_init1(kernel, ramdisk, cmdline);
+
+    rc = xc_domain_max_vcpus(xen_xc, xen_domid, smp_cpus);
+    if (rc < 0) {
+        fprintf(stderr, "xen: xc_domain_max_vcpus() failed\n");
+        goto err;
+    }
+
+#if 0
+    rc = xc_domain_setcpuweight(xen_xc, xen_domid, 256);
+    if (rc < 0) {
+        fprintf(stderr, "xen: xc_domain_setcpuweight() failed\n");
+        goto err;
+    }
+#endif
+
+    rc = xc_domain_setmaxmem(xen_xc, xen_domid, ram_size >> 10);
+    if (rc < 0) {
+        fprintf(stderr, "xen: xc_domain_setmaxmem() failed\n");
+        goto err;
+    }
+
+    xenstore_port = xc_evtchn_alloc_unbound(xen_xc, xen_domid, 0);
+    console_port = xc_evtchn_alloc_unbound(xen_xc, xen_domid, 0);
+
+    rc = xc_linux_build(xen_xc, xen_domid, ram_size >> 20,
+                        kernel, ramdisk, cmdline,
+                        0, flags,
+                        xenstore_port, &xenstore_mfn,
+                        console_port, &console_mfn);
+    if (rc < 0) {
+        fprintf(stderr, "xen: xc_linux_build() failed\n");
+        goto err;
+    }
+
+    xenstore_domain_init2(xenstore_port, xenstore_mfn,
+                          console_port, console_mfn);
+
+    qemu_log("xen: unpausing domain %d\n", xen_domid);
+    rc = xc_domain_unpause(xen_xc, xen_domid);
+    if (rc < 0) {
+        fprintf(stderr, "xen: xc_domain_unpause() failed\n");
+        goto err;
+    }
+
+    xen_poll = timer_new_ms(QEMU_CLOCK_REALTIME, xen_domain_poll, NULL);
+    timer_mod(xen_poll, qemu_clock_get_ms(QEMU_CLOCK_REALTIME) + 1000);
+    return 0;
+
+err:
+    return -1;
+}
diff --git a/hw/xenpv/xen_domainbuild.h b/hw/xenpv/xen_domainbuild.h
new file mode 100644
index 0000000000..29a91ea7b1
--- /dev/null
+++ b/hw/xenpv/xen_domainbuild.h
@@ -0,0 +1,13 @@
+#ifndef QEMU_HW_XEN_DOMAINBUILD_H
+#define QEMU_HW_XEN_DOMAINBUILD_H 1
+
+#include "hw/xen/xen_common.h"
+
+int xenstore_domain_init1(const char *kernel, const char *ramdisk,
+                          const char *cmdline);
+int xenstore_domain_init2(int xenstore_port, int xenstore_mfn,
+                          int console_port, int console_mfn);
+int xen_domain_build_pv(const char *kernel, const char *ramdisk,
+                        const char *cmdline);
+
+#endif /* QEMU_HW_XEN_DOMAINBUILD_H */
diff --git a/hw/xenpv/xen_machine_pv.c b/hw/xenpv/xen_machine_pv.c
new file mode 100644
index 0000000000..9adb57fc14
--- /dev/null
+++ b/hw/xenpv/xen_machine_pv.c
@@ -0,0 +1,109 @@
+/*
+ * QEMU Xen PV Machine
+ *
+ * Copyright (c) 2007 Red Hat
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "hw/hw.h"
+#include "hw/boards.h"
+#include "hw/xen/xen_backend.h"
+#include "xen_domainbuild.h"
+#include "sysemu/blockdev.h"
+
+static void xen_init_pv(QEMUMachineInitArgs *args)
+{
+    const char *kernel_filename = args->kernel_filename;
+    const char *kernel_cmdline = args->kernel_cmdline;
+    const char *initrd_filename = args->initrd_filename;
+    DriveInfo *dinfo;
+    int i;
+
+    /* Initialize backend core & drivers */
+    if (xen_be_init() != 0) {
+        fprintf(stderr, "%s: xen backend core setup failed\n", __FUNCTION__);
+        exit(1);
+    }
+
+    switch (xen_mode) {
+    case XEN_ATTACH:
+        /* nothing to do, xend handles everything */
+        break;
+    case XEN_CREATE:
+        if (xen_domain_build_pv(kernel_filename, initrd_filename,
+                                kernel_cmdline) < 0) {
+            fprintf(stderr, "xen pv domain creation failed\n");
+            exit(1);
+        }
+        break;
+    case XEN_EMULATE:
+        fprintf(stderr, "xen emulation not implemented (yet)\n");
+        exit(1);
+        break;
+    }
+
+    xen_be_register("console", &xen_console_ops);
+    xen_be_register("vkbd", &xen_kbdmouse_ops);
+    xen_be_register("vfb", &xen_framebuffer_ops);
+    xen_be_register("qdisk", &xen_blkdev_ops);
+    xen_be_register("qnic", &xen_netdev_ops);
+
+    /* configure framebuffer */
+    if (xenfb_enabled) {
+        xen_config_dev_vfb(0, "vnc");
+        xen_config_dev_vkbd(0);
+    }
+
+    /* configure disks */
+    for (i = 0; i < 16; i++) {
+        dinfo = drive_get(IF_XEN, 0, i);
+        if (!dinfo)
+            continue;
+        xen_config_dev_blk(dinfo);
+    }
+
+    /* configure nics */
+    for (i = 0; i < nb_nics; i++) {
+        if (!nd_table[i].model || 0 != strcmp(nd_table[i].model, "xen"))
+            continue;
+        xen_config_dev_nic(nd_table + i);
+    }
+
+    /* config cleanup hook */
+    atexit(xen_config_cleanup);
+
+    /* setup framebuffer */
+    xen_init_display(xen_domid);
+}
+
+static QEMUMachine xenpv_machine = {
+    .name = "xenpv",
+    .desc = "Xen Para-virtualized PC",
+    .init = xen_init_pv,
+    .max_cpus = 1,
+    .default_machine_opts = "accel=xen",
+};
+
+static void xenpv_machine_init(void)
+{
+    qemu_register_machine(&xenpv_machine);
+}
+
+machine_init(xenpv_machine_init);