[ck] [PATCH 07/17] tpm: add _head suffix to tcg_efi_specid_event and tcg_pcr_event2

From: Roberto Sassu <roberto.sassu(a)huawei.com> commit c8faabfc6f48009fb0d9ad4203aecfa569e5ff8d upstream. TCG defines two structures, TCG_EfiSpecIDEventStruct and TCG_PCR_EVENT2, which contain variable-sized arrays in the middle of the definition. Since these structures are not suitable for type casting, this patch removes structure members after the variable-sized arrays and adds the _head suffix to the structure name, to indicate that the renamed structures do not contain all fields defined by TCG. Lastly, given that variable-sized arrays are now in the last position, and given that the size of the arrays cannot be determined in advance, this patch also sets the size of those arrays to zero and removes the definition of TPM2_ACTIVE_PCR_BANKS. Signed-off-by: Roberto Sassu <roberto.sassu(a)huawei.com> Reviewed-by: Jarkko Sakkinen <jarkko.sakkinen(a)linux.intel.com> Tested-by: Nayna Jain <nayna(a)linux.ibm.com> Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen(a)linux.intel.com> Signed-off-by: mayuanchen <mayuanchen(a)hygon.cn> Change-Id: Ie36a99b8c25c8a3118c223f4d9bf033eddfef033 --- drivers/char/tpm/eventlog/tpm2.c | 12 ++++++------ include/linux/tpm_eventlog.h | 12 ++++-------- 2 files changed, 10 insertions(+), 14 deletions(-) diff --git a/drivers/char/tpm/eventlog/tpm2.c b/drivers/char/tpm/eventlog/tpm2.c index 41b9f6c92da7..f824563fc28d 100644 --- a/drivers/char/tpm/eventlog/tpm2.c +++ b/drivers/char/tpm/eventlog/tpm2.c @@ -37,10 +37,10 @@ * * Returns size of the event. If it is an invalid event, returns 0. */ -static size_t calc_tpm2_event_size(struct tcg_pcr_event2 *event, +static size_t calc_tpm2_event_size(struct tcg_pcr_event2_head *event, struct tcg_pcr_event *event_header) { - struct tcg_efi_specid_event *efispecid; + struct tcg_efi_specid_event_head *efispecid; struct tcg_event_field *event_field; void *marker; void *marker_start; @@ -55,7 +55,7 @@ static size_t calc_tpm2_event_size(struct tcg_pcr_event2 *event, marker = marker + sizeof(event->pcr_idx) + sizeof(event->event_type) + sizeof(event->count); - efispecid = (struct tcg_efi_specid_event *)event_header->event; + efispecid = (struct tcg_efi_specid_event_head *)event_header->event; /* Check if event is malformed. */ if (event->count > efispecid->num_algs) @@ -95,7 +95,7 @@ static void *tpm2_bios_measurements_start(struct seq_file *m, loff_t *pos) void *addr = log->bios_event_log; void *limit = log->bios_event_log_end; struct tcg_pcr_event *event_header; - struct tcg_pcr_event2 *event; + struct tcg_pcr_event2_head *event; size_t size; int i; @@ -136,7 +136,7 @@ static void *tpm2_bios_measurements_next(struct seq_file *m, void *v, loff_t *pos) { struct tcg_pcr_event *event_header; - struct tcg_pcr_event2 *event; + struct tcg_pcr_event2_head *event; struct tpm_chip *chip = m->private; struct tpm_bios_log *log = &chip->log; void *limit = log->bios_event_log_end; @@ -180,7 +180,7 @@ static int tpm2_binary_bios_measurements_show(struct seq_file *m, void *v) struct tpm_chip *chip = m->private; struct tpm_bios_log *log = &chip->log; struct tcg_pcr_event *event_header = log->bios_event_log; - struct tcg_pcr_event2 *event = v; + struct tcg_pcr_event2_head *event = v; void *temp_ptr; size_t size; diff --git a/include/linux/tpm_eventlog.h b/include/linux/tpm_eventlog.h index 20d9da77fc11..f47342361e87 100644 --- a/include/linux/tpm_eventlog.h +++ b/include/linux/tpm_eventlog.h @@ -8,7 +8,6 @@ #define TCG_EVENT_NAME_LEN_MAX 255 #define MAX_TEXT_EVENT 1000 /* Max event string length */ #define ACPI_TCPA_SIG "TCPA" /* 0x41504354 /'TCPA' */ -#define TPM2_ACTIVE_PCR_BANKS 3 #define EFI_TCG2_EVENT_LOG_FORMAT_TCG_1_2 0x1 #define EFI_TCG2_EVENT_LOG_FORMAT_TCG_2 0x2 @@ -82,7 +81,7 @@ struct tcg_efi_specid_event_algs { u16 digest_size; } __packed; -struct tcg_efi_specid_event { +struct tcg_efi_specid_event_head { u8 signature[16]; u32 platform_class; u8 spec_version_minor; @@ -90,9 +89,7 @@ struct tcg_efi_specid_event { u8 spec_errata; u8 uintnsize; u32 num_algs; - struct tcg_efi_specid_event_algs digest_sizes[TPM2_ACTIVE_PCR_BANKS]; - u8 vendor_info_size; - u8 vendor_info[0]; + struct tcg_efi_specid_event_algs digest_sizes[]; } __packed; struct tcg_pcr_event { @@ -113,12 +110,11 @@ struct tpm2_digest { u8 digest[SHA512_DIGEST_SIZE]; } __packed; -struct tcg_pcr_event2 { +struct tcg_pcr_event2_head { u32 pcr_idx; u32 event_type; u32 count; - struct tpm2_digest digests[TPM2_ACTIVE_PCR_BANKS]; - struct tcg_event_field event; + struct tpm2_digest digests[]; } __packed; #endif -- 2.17.1