tests/qtest/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 #include "libqos/libqos-spapr.h"
  25
  26 #define MAGIC   0xcafec0de
  27 #define ADDRESS 0x4000
  28
  29 static void check_guest_memory(QTestState *qts)
  30 {
  31     uint32_t signature;
  32     int i;
  33
  34     /* Poll until code has run and modified memory. Wait at most 600 seconds */
  35     for (i = 0; i < 60000; ++i) {
  36         signature = qtest_readl(qts, ADDRESS);
  37         if (signature == MAGIC) {
  38             break;
  39         }
  40         g_usleep(10000);
  41     }
  42
  43     g_assert_cmphex(signature, ==, MAGIC);
  44 }
  45
  46 static void test_machine(const void *machine)
  47 {
  48     const char *extra_args = "";
  49     QTestState *qts;
  50
  51     /*
  52      * The pseries firmware boots much faster without the default
  53      * devices, it also needs Spectre/Meltdown workarounds disabled to
  54      * avoid warnings with TCG
  55      */
  56     if (strcmp(machine, "pseries") == 0) {
  57         extra_args = "-nodefaults"
  58             " -machine " PSERIES_DEFAULT_CAPABILITIES;
  59     }
  60
  61     qts = qtest_initf("-M %s -accel tcg %s -prom-env \"use-nvramrc?=true\" "
  62                       "-prom-env \"nvramrc=%x %x l!\" ", (const char *)machine,
  63                       extra_args, MAGIC, ADDRESS);
  64     check_guest_memory(qts);
  65     qtest_quit(qts);
  66 }
  67
  68 static void add_tests(const char *machines[])
  69 {
  70     int i;
  71     char *name;
  72
  73     for (i = 0; machines[i] != NULL; i++) {
  74         if (qtest_has_machine(machines[i])) {
  75             name = g_strdup_printf("prom-env/%s", machines[i]);
  76             qtest_add_data_func(name, machines[i], test_machine);
  77             g_free(name);
  78         }
  79     }
  80 }
  81
  82 int main(int argc, char *argv[])
  83 {
  84     const char *sparc_machines[] = { "SPARCbook", "Voyager", "SS-20", NULL };
  85     const char *sparc64_machines[] = { "sun4u", NULL };
  86     const char *ppc_machines[] = { "mac99", "g3beige", NULL };
  87     const char *arch = qtest_get_arch();
  88
  89     g_test_init(&argc, &argv, NULL);
  90
  91     if (!strcmp(arch, "ppc")) {
  92         add_tests(ppc_machines);
  93     } else if (!strcmp(arch, "ppc64")) {
  94         add_tests(ppc_machines);
  95         if (g_test_slow()) {
  96             qtest_add_data_func("prom-env/pseries", "pseries", test_machine);
  97         }
  98     } else if (!strcmp(arch, "sparc")) {
  99         add_tests(sparc_machines);
 100     } else if (!strcmp(arch, "sparc64")) {
 101         add_tests(sparc64_machines);
 102     } else {
 103         g_assert_not_reached();
 104     }
 105
 106     return g_test_run();
 107 }