tests/pnv-xscom-test.c

   1 /*
   2  * QTest testcase for PowerNV XSCOM bus
   3  *
   4  * Copyright (c) 2016, IBM Corporation.
   5  *
   6  * This work is licensed under the terms of the GNU GPL, version 2 or
   7  * later. See the COPYING file in the top-level directory.
   8  */
   9 #include "qemu/osdep.h"
  10
  11 #include "libqtest.h"
  12
  13 typedef enum PnvChipType {
  14     PNV_CHIP_POWER8E,     /* AKA Murano (default) */
  15     PNV_CHIP_POWER8,      /* AKA Venice */
  16     PNV_CHIP_POWER8NVL,   /* AKA Naples */
  17     PNV_CHIP_POWER9,      /* AKA Nimbus */
  18 } PnvChipType;
  19
  20 typedef struct PnvChip {
  21     PnvChipType chip_type;
  22     const char *cpu_model;
  23     uint64_t    xscom_base;
  24     uint64_t    xscom_core_base;
  25     uint64_t    cfam_id;
  26     uint32_t    first_core;
  27 } PnvChip;
  28
  29 static const PnvChip pnv_chips[] = {
  30     {
  31         .chip_type  = PNV_CHIP_POWER8,
  32         .cpu_model  = "POWER8",
  33         .xscom_base = 0x0003fc0000000000ull,
  34         .xscom_core_base = 0x10000000ull,
  35         .cfam_id    = 0x220ea04980000000ull,
  36         .first_core = 0x1,
  37     }, {
  38         .chip_type  = PNV_CHIP_POWER8NVL,
  39         .cpu_model  = "POWER8NVL",
  40         .xscom_base = 0x0003fc0000000000ull,
  41         .xscom_core_base = 0x10000000ull,
  42         .cfam_id    = 0x120d304980000000ull,
  43         .first_core = 0x1,
  44     },
  45 #if 0 /* POWER9 support is not ready yet */
  46     {
  47         .chip_type  = PNV_CHIP_POWER9,
  48         .cpu_model  = "POWER9",
  49         .xscom_base = 0x000603fc00000000ull,
  50         .xscom_core_base = 0x0ull,
  51         .cfam_id    = 0x100d104980000000ull,
  52         .first_core = 0x20,
  53     },
  54 #endif
  55 };
  56
  57 static uint64_t pnv_xscom_addr(const PnvChip *chip, uint32_t pcba)
  58 {
  59     uint64_t addr = chip->xscom_base;
  60
  61     if (chip->chip_type == PNV_CHIP_POWER9) {
  62         addr |= ((uint64_t) pcba << 3);
  63     } else {
  64         addr |= (((uint64_t) pcba << 4) & ~0xffull) |
  65             (((uint64_t) pcba << 3) & 0x78);
  66     }
  67     return addr;
  68 }
  69
  70 static uint64_t pnv_xscom_read(const PnvChip *chip, uint32_t pcba)
  71 {
  72     return readq(pnv_xscom_addr(chip, pcba));
  73 }
  74
  75 static void test_xscom_cfam_id(const PnvChip *chip)
  76 {
  77     uint64_t f000f = pnv_xscom_read(chip, 0xf000f);
  78
  79     g_assert_cmphex(f000f, ==, chip->cfam_id);
  80 }
  81
  82 static void test_cfam_id(const void *data)
  83 {
  84     char *args;
  85     const PnvChip *chip = data;
  86
  87     args = g_strdup_printf("-M powernv,accel=tcg -cpu %s", chip->cpu_model);
  88
  89     qtest_start(args);
  90     test_xscom_cfam_id(chip);
  91     qtest_quit(global_qtest);
  92
  93     g_free(args);
  94 }
  95
  96 #define PNV_XSCOM_EX_CORE_BASE(chip, i)                 \
  97     ((chip)->xscom_core_base | (((uint64_t)i) << 24))
  98 #define PNV_XSCOM_EX_DTS_RESULT0     0x50000
  99
 100 static void test_xscom_core(const PnvChip *chip)
 101 {
 102     uint32_t first_core_dts0 =
 103         PNV_XSCOM_EX_CORE_BASE(chip, chip->first_core) |
 104         PNV_XSCOM_EX_DTS_RESULT0;
 105     uint64_t dts0 = pnv_xscom_read(chip, first_core_dts0);
 106
 107     g_assert_cmphex(dts0, ==, 0x26f024f023f0000ull);
 108 }
 109
 110 static void test_core(const void *data)
 111 {
 112     char *args;
 113     const PnvChip *chip = data;
 114
 115     args = g_strdup_printf("-M powernv,accel=tcg -cpu %s", chip->cpu_model);
 116
 117     qtest_start(args);
 118     test_xscom_core(chip);
 119     qtest_quit(global_qtest);
 120
 121     g_free(args);
 122 }
 123
 124 static void add_test(const char *name, void (*test)(const void *data))
 125 {
 126     int i;
 127
 128     for (i = 0; i < ARRAY_SIZE(pnv_chips); i++) {
 129         char *tname = g_strdup_printf("pnv-xscom/%s/%s", name,
 130                                       pnv_chips[i].cpu_model);
 131         qtest_add_data_func(tname, &pnv_chips[i], test);
 132         g_free(tname);
 133     }
 134 }
 135
 136 int main(int argc, char **argv)
 137 {
 138     g_test_init(&argc, &argv, NULL);
 139
 140     add_test("cfam_id", test_cfam_id);
 141     add_test("core", test_core);
 142     return g_test_run();
 143 }