^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Copyright (C) 2017 Google, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Thiebaud Weksteen <tweek@google.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #define TPM_MEMREMAP(start, size) early_memremap(start, size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #define TPM_MEMUNMAP(start, size) early_memunmap(start, size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <asm/early_ioremap.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/efi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/memblock.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/tpm_eventlog.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) int efi_tpm_final_log_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) EXPORT_SYMBOL(efi_tpm_final_log_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) static int __init tpm2_calc_event_log_size(void *data, int count, void *size_info)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) struct tcg_pcr_event2_head *header;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) int event_size, size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) while (count > 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) header = data + size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) event_size = __calc_tpm2_event_size(header, size_info, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) if (event_size == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) size += event_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) count--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) return size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * Reserve the memory associated with the TPM Event Log configuration table.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) int __init efi_tpm_eventlog_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct linux_efi_tpm_eventlog *log_tbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) struct efi_tcg2_final_events_table *final_tbl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) int tbl_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) if (efi.tpm_log == EFI_INVALID_TABLE_ADDR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * We can't calculate the size of the final events without the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * first entry in the TPM log, so bail here.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) log_tbl = early_memremap(efi.tpm_log, sizeof(*log_tbl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (!log_tbl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) pr_err("Failed to map TPM Event Log table @ 0x%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) efi.tpm_log);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) efi.tpm_log = EFI_INVALID_TABLE_ADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) tbl_size = sizeof(*log_tbl) + log_tbl->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) memblock_reserve(efi.tpm_log, tbl_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) if (efi.tpm_final_log == EFI_INVALID_TABLE_ADDR) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) pr_info("TPM Final Events table not present\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) } else if (log_tbl->version != EFI_TCG2_EVENT_LOG_FORMAT_TCG_2) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) pr_warn(FW_BUG "TPM Final Events table invalid\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) final_tbl = early_memremap(efi.tpm_final_log, sizeof(*final_tbl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) if (!final_tbl) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) pr_err("Failed to map TPM Final Event Log table @ 0x%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) efi.tpm_final_log);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) efi.tpm_final_log = EFI_INVALID_TABLE_ADDR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) ret = -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) tbl_size = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if (final_tbl->nr_events != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) void *events = (void *)efi.tpm_final_log
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) + sizeof(final_tbl->version)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) + sizeof(final_tbl->nr_events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) tbl_size = tpm2_calc_event_log_size(events,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) final_tbl->nr_events,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) log_tbl->log);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) if (tbl_size < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) pr_err(FW_BUG "Failed to parse event in TPM Final Events Log\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) ret = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) goto out_calc;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) memblock_reserve((unsigned long)final_tbl,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) tbl_size + sizeof(*final_tbl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) efi_tpm_final_log_size = tbl_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) out_calc:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) early_memunmap(final_tbl, sizeof(*final_tbl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) early_memunmap(log_tbl, sizeof(*log_tbl));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110)
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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