cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

prom-env-test.c (3098B)

      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 "libqos/libqtest.h"
     24#include "libqos/libqos-spapr.h"
     25
     26#define MAGIC   0xcafec0de
     27#define ADDRESS 0x4000
     28
     29static 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
     46static 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
     68static void add_tests(const char *machines[])
     69{
     70    int i;
     71    char *name;
     72
     73    for (i = 0; machines[i] != NULL; i++) {
     74        name = g_strdup_printf("prom-env/%s", machines[i]);
     75        qtest_add_data_func(name, machines[i], test_machine);
     76        g_free(name);
     77    }
     78}
     79
     80int main(int argc, char *argv[])
     81{
     82    const char *sparc_machines[] = { "SPARCbook", "Voyager", "SS-20", NULL };
     83    const char *sparc64_machines[] = { "sun4u", NULL };
     84    const char *ppc_machines[] = { "mac99", "g3beige", NULL };
     85    const char *arch = qtest_get_arch();
     86
     87    g_test_init(&argc, &argv, NULL);
     88
     89    if (!strcmp(arch, "ppc")) {
     90        add_tests(ppc_machines);
     91    } else if (!strcmp(arch, "ppc64")) {
     92        add_tests(ppc_machines);
     93        if (g_test_slow()) {
     94            qtest_add_data_func("prom-env/pseries", "pseries", test_machine);
     95        }
     96    } else if (!strcmp(arch, "sparc")) {
     97        add_tests(sparc_machines);
     98    } else if (!strcmp(arch, "sparc64")) {
     99        add_tests(sparc64_machines);
    100    } else {
    101        g_assert_not_reached();
    102    }
    103
    104    return g_test_run();
    105}