1 /* Copyright (c) 2014 The Chromium OS Authors. All rights reserved. 2 * Use of this source code is governed by a BSD-style license that can be 3 * found in the LICENSE file. 4 * 5 * Tests for firmware NV storage library. 6 */ 7 8 #include <stdint.h> 9 #include <stdio.h> 10 #include <stdlib.h> 11 #include <string.h> 12 13 #include "test_common.h" 14 #include "vboot_common.h" 15 16 #include "2api.h" 17 #include "2common.h" 18 #include "2misc.h" 19 #include "2nvstorage.h" 20 21 /* Single NV storage field to test */ 22 struct nv_field { 23 enum vb2_nv_param param; /* Parameter index */ 24 uint32_t default_value; /* Expected default value */ 25 uint32_t test_value; /* Value to test writing */ 26 uint32_t test_value2; /* Second value to test writing */ 27 char *desc; /* Field description */ 28 }; 29 30 /* Array of fields to test, terminated with a field with desc==NULL. */ 31 static struct nv_field nvfields[] = { 32 {VB2_NV_DEBUG_RESET_MODE, 0, 1, 0, "debug reset mode"}, 33 {VB2_NV_TRY_NEXT, 0, 1, 0, "try next"}, 34 {VB2_NV_TRY_COUNT, 0, 6, 15, "try B count"}, 35 {VB2_NV_FW_TRIED, 0, 1, 0, "firmware tried"}, 36 {VB2_NV_FW_RESULT, 0, 1, 2, "firmware result"}, 37 {VB2_NV_FW_PREV_TRIED, 0, 1, 0, "firmware prev tried"}, 38 {VB2_NV_FW_PREV_RESULT, 0, 1, 3, "firmware prev result"}, 39 {VB2_NV_RECOVERY_REQUEST, 0, 0x42, 0xED, "recovery request"}, 40 {VB2_NV_RECOVERY_SUBCODE, 0, 0x56, 0xAC, "recovery subcode"}, 41 {VB2_NV_LOCALIZATION_INDEX, 0, 0x69, 0xB0, "localization index"}, 42 {VB2_NV_KERNEL_FIELD, 0, 0x12345678, 0xFEDCBA98, "kernel field"}, 43 {VB2_NV_DEV_BOOT_USB, 0, 1, 0, "dev boot usb"}, 44 {VB2_NV_DEV_BOOT_LEGACY, 0, 1, 0, "dev boot legacy"}, 45 {VB2_NV_DEV_BOOT_SIGNED_ONLY, 0, 1, 0, "dev boot custom"}, 46 {VB2_NV_DISABLE_DEV_REQUEST, 0, 1, 0, "disable dev request"}, 47 {VB2_NV_CLEAR_TPM_OWNER_REQUEST, 0, 1, 0, "clear tpm owner request"}, 48 {VB2_NV_CLEAR_TPM_OWNER_DONE, 0, 1, 0, "clear tpm owner done"}, 49 {VB2_NV_OPROM_NEEDED, 0, 1, 0, "oprom needed"}, 50 {VB2_NV_BACKUP_NVRAM_REQUEST, 0, 1, 0, "backup nvram request"}, 51 {0, 0, 0, 0, NULL} 52 }; 53 54 static void test_changed(struct vb2_context *ctx, int changed, const char *why) 55 { 56 if (changed) 57 TEST_NEQ(ctx->flags & VB2_CONTEXT_NVDATA_CHANGED, 0, why); 58 else 59 TEST_EQ(ctx->flags & VB2_CONTEXT_NVDATA_CHANGED, 0, why); 60 }; 61 62 static void nv_storage_test(void) 63 { 64 struct nv_field *vnf; 65 uint8_t goodcrc; 66 uint8_t workbuf[VB2_WORKBUF_RECOMMENDED_SIZE] 67 __attribute__ ((aligned (VB2_WORKBUF_ALIGN))); 68 struct vb2_context c = { 69 .flags = 0, 70 .workbuf = workbuf, 71 .workbuf_size = sizeof(workbuf), 72 }; 73 struct vb2_shared_data *sd = vb2_get_sd(&c); 74 75 memset(c.nvdata, 0xA6, sizeof(c.nvdata)); 76 vb2_init_context(&c); 77 78 /* Init with invalid data should set defaults and regenerate CRC */ 79 vb2_nv_init(&c); 80 TEST_EQ(c.nvdata[0], 0x70, "vb2_nv_init() reset header byte"); 81 TEST_NEQ(c.nvdata[15], 0, "vb2_nv_init() CRC"); 82 TEST_EQ(sd->status, VB2_SD_STATUS_NV_INIT | VB2_SD_STATUS_NV_REINIT, 83 "vb2_nv_init() status changed"); 84 test_changed(&c, 1, "vb2_nv_init() reset changed"); 85 goodcrc = c.nvdata[15]; 86 TEST_SUCC(vb2_nv_check_crc(&c), "vb2_nv_check_crc() good"); 87 88 /* Another init should not cause further changes */ 89 c.flags = 0; 90 sd->status = 0; 91 vb2_nv_init(&c); 92 test_changed(&c, 0, "vb2_nv_init() didn't re-reset"); 93 TEST_EQ(c.nvdata[15], goodcrc, "vb2_nv_init() CRC same"); 94 TEST_EQ(sd->status, VB2_SD_STATUS_NV_INIT, "vb2_nv_init() status same"); 95 96 /* Perturbing the header should force defaults */ 97 c.nvdata[0] ^= 0x40; 98 TEST_EQ(vb2_nv_check_crc(&c), 99 VB2_ERROR_NV_HEADER, "vb2_nv_check_crc() bad header"); 100 vb2_nv_init(&c); 101 TEST_EQ(c.nvdata[0], 0x70, "vb2_nv_init() reset header byte again"); 102 test_changed(&c, 1, "vb2_nv_init() corrupt changed"); 103 TEST_EQ(c.nvdata[15], goodcrc, "vb2_nv_init() CRC same again"); 104 105 /* So should perturbing some other byte */ 106 TEST_EQ(c.nvdata[11], 0, "Kernel byte starts at 0"); 107 c.nvdata[11] = 12; 108 TEST_EQ(vb2_nv_check_crc(&c), 109 VB2_ERROR_NV_CRC, "vb2_nv_check_crc() bad CRC"); 110 vb2_nv_init(&c); 111 TEST_EQ(c.nvdata[11], 0, "vb2_nv_init() reset kernel byte"); 112 test_changed(&c, 1, "vb2_nv_init() corrupt elsewhere changed"); 113 TEST_EQ(c.nvdata[15], goodcrc, "vb2_nv_init() CRC same again"); 114 115 /* Clear the kernel and firmware flags */ 116 vb2_nv_init(&c); 117 TEST_EQ(vb2_nv_get(&c, VB2_NV_FIRMWARE_SETTINGS_RESET), 118 1, "Firmware settings are reset"); 119 vb2_nv_set(&c, VB2_NV_FIRMWARE_SETTINGS_RESET, 0); 120 TEST_EQ(vb2_nv_get(&c, VB2_NV_FIRMWARE_SETTINGS_RESET), 121 0, "Firmware settings are clear"); 122 123 TEST_EQ(vb2_nv_get(&c, VB2_NV_KERNEL_SETTINGS_RESET), 124 1, "Kernel settings are reset"); 125 vb2_nv_set(&c, VB2_NV_KERNEL_SETTINGS_RESET, 0); 126 TEST_EQ(vb2_nv_get(&c, VB2_NV_KERNEL_SETTINGS_RESET), 127 0, "Kernel settings are clear"); 128 129 TEST_EQ(c.nvdata[0], 0x40, "Header byte now just has the header bit"); 130 /* That should have changed the CRC */ 131 TEST_NEQ(c.nvdata[15], goodcrc, 132 "vb2_nv_init() CRC changed due to flags clear"); 133 134 /* Test explicitly setting the reset flags again */ 135 vb2_nv_init(&c); 136 vb2_nv_set(&c, VB2_NV_FIRMWARE_SETTINGS_RESET, 1); 137 TEST_EQ(vb2_nv_get(&c, VB2_NV_FIRMWARE_SETTINGS_RESET), 138 1, "Firmware settings forced reset"); 139 vb2_nv_set(&c, VB2_NV_FIRMWARE_SETTINGS_RESET, 0); 140 141 vb2_nv_set(&c, VB2_NV_KERNEL_SETTINGS_RESET, 1); 142 TEST_EQ(vb2_nv_get(&c, VB2_NV_KERNEL_SETTINGS_RESET), 143 1, "Kernel settings forced reset"); 144 vb2_nv_set(&c, VB2_NV_KERNEL_SETTINGS_RESET, 0); 145 146 /* Get/set an invalid field */ 147 vb2_nv_init(&c); 148 vb2_nv_set(&c, -1, 1); 149 TEST_EQ(vb2_nv_get(&c, -1), 0, "Get invalid setting"); 150 151 /* Test other fields */ 152 vb2_nv_init(&c); 153 for (vnf = nvfields; vnf->desc; vnf++) { 154 TEST_EQ(vb2_nv_get(&c, vnf->param), vnf->default_value, 155 vnf->desc); 156 vb2_nv_set(&c, vnf->param, vnf->test_value); 157 TEST_EQ(vb2_nv_get(&c, vnf->param), vnf->test_value, vnf->desc); 158 vb2_nv_set(&c, vnf->param, vnf->test_value2); 159 TEST_EQ(vb2_nv_get(&c, vnf->param), vnf->test_value2, 160 vnf->desc); 161 } 162 163 /* None of those changes should have caused a reset to defaults */ 164 vb2_nv_init(&c); 165 TEST_EQ(vb2_nv_get(&c, VB2_NV_FIRMWARE_SETTINGS_RESET), 166 0, "Firmware settings are still clear"); 167 TEST_EQ(vb2_nv_get(&c, VB2_NV_KERNEL_SETTINGS_RESET), 168 0, "Kernel settings are still clear"); 169 170 /* Writing identical settings doesn't cause the CRC to regenerate */ 171 c.flags = 0; 172 vb2_nv_init(&c); 173 test_changed(&c, 0, "No regen CRC on open"); 174 for (vnf = nvfields; vnf->desc; vnf++) 175 vb2_nv_set(&c, vnf->param, vnf->test_value2); 176 test_changed(&c, 0, "No regen CRC if data not changed"); 177 178 /* Test out-of-range fields mapping to defaults or failing */ 179 vb2_nv_init(&c); 180 vb2_nv_set(&c, VB2_NV_TRY_COUNT, 16); 181 TEST_EQ(vb2_nv_get(&c, VB2_NV_TRY_COUNT), 182 15, "Try b count out of range"); 183 vb2_nv_set(&c, VB2_NV_RECOVERY_REQUEST, 0x101); 184 TEST_EQ(vb2_nv_get(&c, VB2_NV_RECOVERY_REQUEST), 185 VB2_RECOVERY_LEGACY, "Recovery request out of range"); 186 vb2_nv_set(&c, VB2_NV_LOCALIZATION_INDEX, 0x102); 187 TEST_EQ(vb2_nv_get(&c, VB2_NV_LOCALIZATION_INDEX), 188 0, "Localization index out of range"); 189 190 vb2_nv_set(&c, VB2_NV_FW_RESULT, VB2_FW_RESULT_UNKNOWN + 1); 191 vb2_nv_set(&c, VB2_NV_FW_RESULT, VB2_FW_RESULT_UNKNOWN + 100); 192 TEST_EQ(vb2_nv_get(&c, VB2_NV_FW_RESULT), 193 VB2_FW_RESULT_UNKNOWN, "Firmware result out of range"); 194 } 195 196 int main(int argc, char* argv[]) 197 { 198 nv_storage_test(); 199 200 return gTestSuccess ? 0 : 255; 201 } 202
