From fa1f6ff09e1f308bd34f0d7af71c5022083888ee Mon Sep 17 00:00:00 2001 From: Philipp Deppenwiese Date: Sun, 13 May 2018 12:42:42 +0200 Subject: [PATCH] util/cbmem: Add cbmem TCPA log support * Read and print the TCPA ACPI log. Change-Id: Ie2253d86cfc675d45b0a728794cc784215401f4a Signed-off-by: Philipp Deppenwiese Reviewed-on: https://review.coreboot.org/26244 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Rudolph --- .../include/commonlib/coreboot_tables.h | 1 + src/lib/coreboot_table.c | 3 +- util/cbmem/cbmem.c | 76 +++++++++++++++++-- 3 files changed, 73 insertions(+), 7 deletions(-) diff --git a/src/commonlib/include/commonlib/coreboot_tables.h b/src/commonlib/include/commonlib/coreboot_tables.h index f411ff206b..806dfc76d4 100644 --- a/src/commonlib/include/commonlib/coreboot_tables.h +++ b/src/commonlib/include/commonlib/coreboot_tables.h @@ -310,6 +310,7 @@ void lb_ramoops(struct lb_header *header); #define LB_TAG_CBMEM_CONSOLE 0x0017 #define LB_TAG_MRC_CACHE 0x0018 #define LB_TAG_ACPI_GNVS 0x0024 +#define LB_TAG_TCPA_LOG 0x0034 #define LB_TAG_WIFI_CALIBRATION 0x0027 #define LB_TAG_VPD 0x002c struct lb_cbmem_ref { diff --git a/src/lib/coreboot_table.c b/src/lib/coreboot_table.c index 8fc7b6f255..2d74c8ec7f 100644 --- a/src/lib/coreboot_table.c +++ b/src/lib/coreboot_table.c @@ -339,7 +339,8 @@ static void add_cbmem_pointers(struct lb_header *header) {CBMEM_ID_CONSOLE, LB_TAG_CBMEM_CONSOLE}, {CBMEM_ID_ACPI_GNVS, LB_TAG_ACPI_GNVS}, {CBMEM_ID_VPD, LB_TAG_VPD}, - {CBMEM_ID_WIFI_CALIBRATION, LB_TAG_WIFI_CALIBRATION} + {CBMEM_ID_WIFI_CALIBRATION, LB_TAG_WIFI_CALIBRATION}, + {CBMEM_ID_TCPA_LOG, LB_TAG_TCPA_LOG} }; int i; diff --git a/util/cbmem/cbmem.c b/util/cbmem/cbmem.c index 42761dc846..3435c4c667 100644 --- a/util/cbmem/cbmem.c +++ b/util/cbmem/cbmem.c @@ -34,6 +34,7 @@ #include #include #include +#include #include #ifdef __OpenBSD__ @@ -264,6 +265,7 @@ static int find_cbmem_entry(uint32_t id, uint64_t *addr, size_t *size) static struct lb_cbmem_ref timestamps; static struct lb_cbmem_ref console; +static struct lb_cbmem_ref tcpa_log; static struct lb_memory_range cbmem; /* This is a work-around for a nasty problem introduced by initially having @@ -308,7 +310,7 @@ static void parse_memory_tags(const struct lb_memory *mem) static int parse_cbtable_entries(const struct mapping *table_mapping) { size_t i; - const struct lb_record* lbr_p; + const struct lb_record *lbr_p; size_t table_size = mapping_size(table_mapping); const void *lbtable = mapping_virt(table_mapping); int forwarding_table_found = 0; @@ -323,12 +325,19 @@ static int parse_cbtable_entries(const struct mapping *table_mapping) continue; case LB_TAG_TIMESTAMPS: { debug(" Found timestamp table.\n"); - timestamps = parse_cbmem_ref((struct lb_cbmem_ref *) lbr_p); + timestamps = + parse_cbmem_ref((struct lb_cbmem_ref *)lbr_p); continue; } case LB_TAG_CBMEM_CONSOLE: { debug(" Found cbmem console.\n"); - console = parse_cbmem_ref((struct lb_cbmem_ref *) lbr_p); + console = parse_cbmem_ref((struct lb_cbmem_ref *)lbr_p); + continue; + } + case LB_TAG_TCPA_LOG: { + debug(" Found tcpa log table.\n"); + tcpa_log = + parse_cbmem_ref((struct lb_cbmem_ref *)lbr_p); continue; } case LB_TAG_FORWARD: { @@ -338,7 +347,7 @@ static int parse_cbtable_entries(const struct mapping *table_mapping) * search at the new address. */ struct lb_forward lbf_p = - *(const struct lb_forward *) lbr_p; + *(const struct lb_forward *)lbr_p; debug(" Found forwarding entry.\n"); ret = parse_cbtable(lbf_p.forward, 0); @@ -674,6 +683,51 @@ static void dump_timestamps(int mach_readable) free(sorted_tst_p); } +/* dump the tcpa log table */ +static void dump_tcpa_log(void) +{ + int i, j; + const struct tcpa_table *tclt_p; + size_t size; + struct mapping tcpa_mapping; + char log_string[TCPA_LOG_STRING_LENGTH]; + char hash[TCPA_FORMAT_HASH_LENGTH]; + + if (tcpa_log.tag != LB_TAG_TCPA_LOG) { + fprintf(stderr, "No tcpa log found in coreboot table.\n"); + return; + } + + size = sizeof(*tclt_p); + tclt_p = map_memory(&tcpa_mapping, tcpa_log.cbmem_addr, size); + if (!tclt_p) + die("Unable to map tcpa log header\n"); + + size += tclt_p->num_entries * sizeof(tclt_p->entries[0]); + + unmap_memory(&tcpa_mapping); + + tclt_p = map_memory(&tcpa_mapping, tcpa_log.cbmem_addr, size); + if (!tclt_p) + die("Unable to map full tcpa log table\n"); + + printf("coreboot TCPA log:\n\n"); + + for (i = 0; i < tclt_p->num_entries; i++) { + const struct tcpa_entry *tce = &tclt_p->entries[i]; + + memset(log_string, 0, TCPA_LOG_STRING_LENGTH); + for (j = 0; j < tce->digest_length; j++) + sprintf((char *)&(hash[j * 2]), "%02x", tce->digest[j]); + + snprintf(log_string, TCPA_LOG_STRING_LENGTH, "%u %s 00 [%s]\n", + tce->pcr, hash, tce->name); + printf("%s", log_string); + } + + unmap_memory(&tcpa_mapping); +} + struct cbmem_console { u32 size; u32 cursor; @@ -1051,7 +1105,7 @@ static void print_version(void) static void print_usage(const char *name, int exit_code) { - printf("usage: %s [-cCltTxVvh?]\n", name); + printf("usage: %s [-cCltTLxVvh?]\n", name); printf("\n" " -c | --console: print cbmem console\n" " -1 | --oneboot: print cbmem console for last boot only\n" @@ -1061,6 +1115,7 @@ static void print_usage(const char *name, int exit_code) " -r | --rawdump ID: print rawdump of specific ID (in hex) of cbtable\n" " -t | --timestamps: print timestamp information\n" " -T | --parseable-timestamps: print parseable timestamps\n" + " -L | --tcpa-log print TCPA log\n" " -V | --verbose: verbose (debugging) output\n" " -v | --version: print the version\n" " -h | --help: print this help\n" @@ -1192,6 +1247,7 @@ int main(int argc, char** argv) int print_hexdump = 0; int print_rawdump = 0; int print_timestamps = 0; + int print_tcpa_log = 0; int machine_readable_timestamps = 0; int one_boot_only = 0; unsigned int rawdump_id = 0; @@ -1202,6 +1258,7 @@ int main(int argc, char** argv) {"oneboot", 0, 0, '1'}, {"coverage", 0, 0, 'C'}, {"list", 0, 0, 'l'}, + {"tcpa-log", 0, 0, 'L'}, {"timestamps", 0, 0, 't'}, {"parseable-timestamps", 0, 0, 'T'}, {"hexdump", 0, 0, 'x'}, @@ -1211,7 +1268,7 @@ int main(int argc, char** argv) {"help", 0, 0, 'h'}, {0, 0, 0, 0} }; - while ((opt = getopt_long(argc, argv, "c1CltTxVvh?r:", + while ((opt = getopt_long(argc, argv, "c1CltTLxVvh?r:", long_options, &option_index)) != EOF) { switch (opt) { case 'c': @@ -1231,6 +1288,10 @@ int main(int argc, char** argv) print_list = 1; print_defaults = 0; break; + case 'L': + print_tcpa_log = 1; + print_defaults = 0; + break; case 'x': print_hexdump = 1; print_defaults = 0; @@ -1357,6 +1418,9 @@ int main(int argc, char** argv) if (print_defaults || print_timestamps) dump_timestamps(machine_readable_timestamps); + if (print_tcpa_log) + dump_tcpa_log(); + unmap_memory(&lbtable_mapping); close(mem_fd);