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
  28 static 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
  45 static 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
  67 static 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
  79 int 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 }