LXR qemu/tests/prom-env-test.c

   1/*
   2 * Test Open-Firmware-based machines.
   3 *
   4 * Copyright (c) 2016, 2017 Red Hat Inc.
   5 *
   6 * Author:
   7 *    Thomas Huth <thuth@redhat.com>
   8 *
   9 * This work is licensed under the terms of the GNU GPL, version 2
  10 * or later. See the COPYING file in the top-level directory.
  11 *
  12 * This test is used to check that some Open Firmware based machines (i.e.
  13 * OpenBIOS or SLOF) can be started successfully in TCG mode. To do this, we
  14 * first put some Forth code into the "boot-command" Open Firmware environment
  15 * variable. This Forth code writes a well-known magic value to a known location
  16 * in memory. Then we start the guest so that the firmware can boot and finally
  17 * run the Forth code.
  18 * The testing code here then can finally check whether the value has been
  19 * successfully written into the guest memory.
  20 */
  21
  22#include "qemu/osdep.h"
  23#include "libqtest.h"
  24
  25#define MAGIC   0xcafec0de
  26#define ADDRESS 0x4000
  27
  28static void check_guest_memory(QTestState *qts)
  29{
  30    uint32_t signature;
  31    int i;
  32
  33    /* Poll until code has run and modified memory. Wait at most 600 seconds */
  34    for (i = 0; i < 60000; ++i) {
  35        signature = qtest_readl(qts, ADDRESS);
  36        if (signature == MAGIC) {
  37            break;
  38        }
  39        g_usleep(10000);
  40    }
  41
  42    g_assert_cmphex(signature, ==, MAGIC);
  43}
  44
  45static void test_machine(const void *machine)
  46{
  47    const char *extra_args = "";
  48    QTestState *qts;
  49
  50    /*
  51     * The pseries firmware boots much faster without the default
  52     * devices, it also needs Spectre/Meltdown workarounds disabled to
  53     * avoid warnings with TCG
  54     */
  55    if (strcmp(machine, "pseries") == 0) {
  56        extra_args = "-nodefaults"
  57            " -machine cap-cfpc=broken,cap-sbbc=broken,cap-ibs=broken";
  58    }
  59
  60    qts = qtest_initf("-M %s,accel=tcg %s -prom-env 'use-nvramrc?=true' "
  61                      "-prom-env 'nvramrc=%x %x l!' ", (const char *)machine,
  62                      extra_args, MAGIC, ADDRESS);
  63    check_guest_memory(qts);
  64    qtest_quit(qts);
  65}
  66
  67static void add_tests(const char *machines[])
  68{
  69    int i;
  70    char *name;
  71
  72    for (i = 0; machines[i] != NULL; i++) {
  73        name = g_strdup_printf("prom-env/%s", machines[i]);
  74        qtest_add_data_func(name, machines[i], test_machine);
  75        g_free(name);
  76    }
  77}
  78
  79int main(int argc, char *argv[])
  80{
  81    const char *sparc_machines[] = { "SPARCbook", "Voyager", "SS-20", NULL };
  82    const char *sparc64_machines[] = { "sun4u", NULL };
  83    const char *ppc_machines[] = { "mac99", "g3beige", NULL };
  84    const char *arch = qtest_get_arch();
  85
  86    g_test_init(&argc, &argv, NULL);
  87
  88    if (!strcmp(arch, "ppc")) {
  89        add_tests(ppc_machines);
  90    } else if (!strcmp(arch, "ppc64")) {
  91        add_tests(ppc_machines);
  92        if (g_test_slow()) {
  93            qtest_add_data_func("prom-env/pseries", "pseries", test_machine);
  94        }
  95    } else if (!strcmp(arch, "sparc")) {
  96        add_tests(sparc_machines);
  97    } else if (!strcmp(arch, "sparc64")) {
  98        add_tests(sparc64_machines);
  99    } else {
 100        g_assert_not_reached();
 101    }
 102
 103    return g_test_run();
 104}
 105