util/intelmetool: Fix the BootGuard dump feature
Read the correct bits for measured and verified boot, print information about some other bits. Signed-off-by: Pablo Stebler <pablo@stebler.xyz> Change-Id: Ie79d6da33032aee94d716bf0698b5501bbc424fa Reviewed-on: https://review.coreboot.org/c/coreboot/+/45516 Tested-by: build bot (Jenkins) <no-reply@coreboot.org> Reviewed-by: Angel Pons <th3fanbus@gmail.com>
This commit is contained in:
Pablo Stebler
Angel Pons
parent
ca128a0eb4
commit
9ac91d220f
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@ -314,12 +314,16 @@ out:
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rehide_me();
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}
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static void print_btg_bool_param(const char *name, u8 state)
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{
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printf("%-20s : %s\n", name, state ? "ON" : "OFF");
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}
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static void dump_bootguard_info(void)
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{
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struct pci_dev *dev;
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char namebuf[1024];
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const char *name = NULL;
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uint64_t bootguard = 0;
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if (pci_platform_scan())
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return;
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@ -342,59 +346,74 @@ static void dump_bootguard_info(void)
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if (ME_major_ver &&
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(ME_major_ver < 9 ||
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(ME_major_ver == 9 && ME_minor_ver < 5))) {
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print_cap("BootGuard ", 0);
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printf(CGRN "\nYour system isn't bootguard ready. You can "
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"flash other firmware!\n" RESET);
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printf(CGRN "Your system isn't BootGuard ready.\n"
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"You can flash other firmware!\n" RESET);
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rehide_me();
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return;
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}
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if (msr_bootguard(&bootguard, debug) < 0) {
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printf("ME Capability: %-43s: " CCYN "%s\n" RESET,
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"BootGuard Mode", "Unknown");
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rehide_me();
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return;
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}
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if (debug) {
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printf("BootGuard MSR Output: 0x%" PRIx64 "\n", bootguard);
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bootguard &= ~0xff;
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}
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print_cap("BootGuard ", 1);
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if (pci_read_long(dev, 0x40) & 0x10)
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printf(CYEL "Your southbridge configuration is insecure!! "
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printf(CYEL "Your southbridge configuration is insecure!!\n"
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"BootGuard keys can be overwritten or wiped, or you are "
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"in developer mode.\n"
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RESET);
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rehide_me();
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switch (bootguard) {
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case BOOTGUARD_DISABLED:
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printf("ME Capability: %-43s: " CGRN "%s\n" RESET,
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"BootGuard Mode", "Disabled");
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printf(CGRN "\nYour system is bootguard ready but your vendor "
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"disabled it. You can flash other firmware!\n" RESET);
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break;
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case BOOTGUARD_ENABLED_COMBI_MODE:
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printf("ME Capability: %-43s: " CGRN "%s\n" RESET,
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"BootGuard Mode", "Verified & Measured Boot");
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printf(CRED "\nVerified boot is enabled. You can't flash other "
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"firmware. !\n" RESET);
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break;
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case BOOTGUARD_ENABLED_MEASUREMENT_MODE:
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printf("ME Capability: %-43s: " CGRN "%s\n" RESET,
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"BootGuard Mode", "Measured Boot");
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printf(CGRN "\nYour system is bootguard ready but only running "
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"the measured boot mode. You can flash other firmware!\n"
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RESET);
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break;
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case BOOTGUARD_ENABLED_VERIFIED_MODE:
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printf("ME Capability: %-43s: " CGRN "%s\n" RESET,
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"BootGuard Mode", "Verified Boot");
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printf(CRED "\nVerified boot is enabled! You can't flash other "
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"firmware.\n" RESET);
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break;
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union {
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struct {
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u8 nem_enabled : 1; /* [ 0.. 0] */
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u8 tpm_type : 2; /* [ 2.. 1] */
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u8 tpm_success : 1; /* [ 3.. 3] */
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u8 facb_fpf : 1; /* [ 4.. 4] */
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u8 measured_boot : 1; /* [ 5.. 5] */
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u8 verified_boot : 1; /* [ 6.. 6] */
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u8 module_revoked : 1; /* [ 7.. 7] */
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u32 : 24;
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u8 btg_capability : 1; /* [32..32] */
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u32 : 31;
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};
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u64 raw;
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} btg;
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if (msr_bootguard(&btg.raw) < 0) {
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printf("Could not read the BOOTGUARD_SACM_INFO MSR.\n");
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return;
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}
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printf("BootGuard MSR Output : 0x%" PRIx64 "\n", btg.raw);
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if (!btg.btg_capability) {
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printf(CGRN "Your system isn't BootGuard ready.\n"
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"You can flash other firmware!\n" RESET);
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return;
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}
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print_btg_bool_param("Measured boot", btg.measured_boot);
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print_btg_bool_param("Verified boot", btg.verified_boot);
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print_btg_bool_param("FACB in FPFs", btg.facb_fpf);
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print_btg_bool_param("Module revoked", btg.module_revoked);
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if (btg.measured_boot) {
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const char *const tpm_type_strs[] = {
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"None",
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"TPM 1.2",
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"TPM 2.0",
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"PTT",
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};
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printf("%-20s : %s\n", "TPM type", tpm_type_strs[btg.tpm_type]);
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print_btg_bool_param("TPM success", btg.tpm_success);
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}
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if (btg.verified_boot) {
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print_btg_bool_param("NEM enabled", btg.nem_enabled);
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if (btg.nem_enabled)
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printf(CRED "Verified boot is enabled and ACM has enabled "
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"Cache-As-RAM.\nYou can't flash other firmware!\n" RESET);
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else
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printf(CYEL "Verified boot is enabled, but ACM did not enable "
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"Cache-As-RAM.\nIt might be possible to flash other firmware.\n"
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RESET);
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} else {
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printf(CGRN "Your system is BootGuard ready but verified boot is disabled.\n"
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"You can flash other firmware!\n" RESET);
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}
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}
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@ -48,11 +48,6 @@
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#define ME_MESSAGE_LEN 256
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extern int debug;
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static inline void print_cap(const char *name, int state)
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{
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printf("ME Capability: %-30s : %s\n",
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name, state ? CRED "ON" RESET : CGRN "OFF" RESET);
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}
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#define PCI_VENDOR_ID_INTEL 0x8086
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@ -495,13 +490,3 @@ static inline void print_cap(const char *name, int state)
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((x) == PCI_DEVICE_ID_INTEL_LEWISBURG_IE3) || \
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((x) == PCI_DEVICE_ID_INTEL_CANNONLAKE) || \
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0)
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#define BOOTGUARD_DISABLED 0x400000000
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#define BOOTGUARD_ENABLED_VERIFIED_MODE 0x100000000
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#define BOOTGUARD_ENABLED_MEASUREMENT_MODE 0x200000000
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#define BOOTGUARD_ENABLED_COMBI_MODE 0x300000000
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#define BOOTGUARD_CAPABILITY(x) ( \
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((x) == BOOTGUARD_DISABLED) || \
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((x) == BOOTGUARD_ENABLED_VERIFIED_MODE) || \
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((x) == BOOTGUARD_ENABLED_MEASUREMENT_MODE) || \
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((x) == BOOTGUARD_ENABLED_COMBI_MODE))
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@ -413,6 +413,12 @@ int mkhi_get_fw_version(int *major, int *minor)
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return 0;
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}
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static void print_cap(const char *name, int state)
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{
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printf("ME Capability: %-30s : %s\n",
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name, state ? CRED "ON" RESET : CGRN "OFF" RESET);
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}
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/* Get ME Firmware Capabilities */
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int mkhi_get_fwcaps(void)
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{
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@ -39,7 +39,7 @@ static int rdmsr(int addr, uint64_t *msr)
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}
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#endif
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int msr_bootguard(uint64_t *msr, int debug)
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int msr_bootguard(uint64_t *msr)
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{
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#ifndef __DARWIN__
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@ -54,8 +54,5 @@ int msr_bootguard(uint64_t *msr, int debug)
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return -1;
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#endif
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if (!debug)
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*msr &= ~0xff;
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return 0;
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}
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@ -13,5 +13,5 @@ typedef struct {
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unsigned int ecx;
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} regs_t;
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extern int msr_bootguard(uint64_t *msr, int debug);
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extern int msr_bootguard(uint64_t *msr);
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#endif
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