mirror of
https://github.com/torvalds/linux.git
synced 2024-11-27 14:41:39 +00:00
vTPM: support little endian guests
This patch makes the code endianness independent. We defined a macro do_endian_conversion to apply endianness to raw integers in the event entries so that they will be displayed properly. tpm_binary_bios_measurements_show() is modified for the display. Signed-off-by: Hon Ching(Vicky) Lo <honclo@linux.vnet.ibm.com> Signed-off-by: Joy Latten <jmlatten@linux.vnet.ibm.com> Reviewed-by: Ashley Lai <ashley@ahsleylai.com> Reviewed-by: Ashley Lai <ashley@ahsleylai.com> Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
This commit is contained in:
Hon Ching \(Vicky\) Lo
Peter Huewe
parent
09e23a4a5d
commit
0cc698af36
@ -76,15 +76,25 @@ static void *tpm_bios_measurements_start(struct seq_file *m, loff_t *pos)
|
||||
void *addr = log->bios_event_log;
|
||||
void *limit = log->bios_event_log_end;
|
||||
struct tcpa_event *event;
|
||||
u32 converted_event_size;
|
||||
u32 converted_event_type;
|
||||
|
||||
|
||||
/* read over *pos measurements */
|
||||
for (i = 0; i < *pos; i++) {
|
||||
event = addr;
|
||||
|
||||
converted_event_size =
|
||||
do_endian_conversion(event->event_size);
|
||||
converted_event_type =
|
||||
do_endian_conversion(event->event_type);
|
||||
|
||||
if ((addr + sizeof(struct tcpa_event)) < limit) {
|
||||
if (event->event_type == 0 && event->event_size == 0)
|
||||
if ((converted_event_type == 0) &&
|
||||
(converted_event_size == 0))
|
||||
return NULL;
|
||||
addr += sizeof(struct tcpa_event) + event->event_size;
|
||||
addr += (sizeof(struct tcpa_event) +
|
||||
converted_event_size);
|
||||
}
|
||||
}
|
||||
|
||||
@ -94,8 +104,12 @@ static void *tpm_bios_measurements_start(struct seq_file *m, loff_t *pos)
|
||||
|
||||
event = addr;
|
||||
|
||||
if ((event->event_type == 0 && event->event_size == 0) ||
|
||||
((addr + sizeof(struct tcpa_event) + event->event_size) >= limit))
|
||||
converted_event_size = do_endian_conversion(event->event_size);
|
||||
converted_event_type = do_endian_conversion(event->event_type);
|
||||
|
||||
if (((converted_event_type == 0) && (converted_event_size == 0))
|
||||
|| ((addr + sizeof(struct tcpa_event) + converted_event_size)
|
||||
>= limit))
|
||||
return NULL;
|
||||
|
||||
return addr;
|
||||
@ -107,8 +121,12 @@ static void *tpm_bios_measurements_next(struct seq_file *m, void *v,
|
||||
struct tcpa_event *event = v;
|
||||
struct tpm_bios_log *log = m->private;
|
||||
void *limit = log->bios_event_log_end;
|
||||
u32 converted_event_size;
|
||||
u32 converted_event_type;
|
||||
|
||||
v += sizeof(struct tcpa_event) + event->event_size;
|
||||
converted_event_size = do_endian_conversion(event->event_size);
|
||||
|
||||
v += sizeof(struct tcpa_event) + converted_event_size;
|
||||
|
||||
/* now check if current entry is valid */
|
||||
if ((v + sizeof(struct tcpa_event)) >= limit)
|
||||
@ -116,11 +134,11 @@ static void *tpm_bios_measurements_next(struct seq_file *m, void *v,
|
||||
|
||||
event = v;
|
||||
|
||||
if (event->event_type == 0 && event->event_size == 0)
|
||||
return NULL;
|
||||
converted_event_size = do_endian_conversion(event->event_size);
|
||||
converted_event_type = do_endian_conversion(event->event_type);
|
||||
|
||||
if ((event->event_type == 0 && event->event_size == 0) ||
|
||||
((v + sizeof(struct tcpa_event) + event->event_size) >= limit))
|
||||
if (((converted_event_type == 0) && (converted_event_size == 0)) ||
|
||||
((v + sizeof(struct tcpa_event) + converted_event_size) >= limit))
|
||||
return NULL;
|
||||
|
||||
(*pos)++;
|
||||
@ -140,7 +158,7 @@ static int get_event_name(char *dest, struct tcpa_event *event,
|
||||
int i, n_len = 0, d_len = 0;
|
||||
struct tcpa_pc_event *pc_event;
|
||||
|
||||
switch(event->event_type) {
|
||||
switch (do_endian_conversion(event->event_type)) {
|
||||
case PREBOOT:
|
||||
case POST_CODE:
|
||||
case UNUSED:
|
||||
@ -156,14 +174,16 @@ static int get_event_name(char *dest, struct tcpa_event *event,
|
||||
case NONHOST_CODE:
|
||||
case NONHOST_CONFIG:
|
||||
case NONHOST_INFO:
|
||||
name = tcpa_event_type_strings[event->event_type];
|
||||
name = tcpa_event_type_strings[do_endian_conversion
|
||||
(event->event_type)];
|
||||
n_len = strlen(name);
|
||||
break;
|
||||
case SEPARATOR:
|
||||
case ACTION:
|
||||
if (MAX_TEXT_EVENT > event->event_size) {
|
||||
if (MAX_TEXT_EVENT >
|
||||
do_endian_conversion(event->event_size)) {
|
||||
name = event_entry;
|
||||
n_len = event->event_size;
|
||||
n_len = do_endian_conversion(event->event_size);
|
||||
}
|
||||
break;
|
||||
case EVENT_TAG:
|
||||
@ -171,7 +191,7 @@ static int get_event_name(char *dest, struct tcpa_event *event,
|
||||
|
||||
/* ToDo Row data -> Base64 */
|
||||
|
||||
switch (pc_event->event_id) {
|
||||
switch (do_endian_conversion(pc_event->event_id)) {
|
||||
case SMBIOS:
|
||||
case BIS_CERT:
|
||||
case CMOS:
|
||||
@ -179,7 +199,8 @@ static int get_event_name(char *dest, struct tcpa_event *event,
|
||||
case OPTION_ROM_EXEC:
|
||||
case OPTION_ROM_CONFIG:
|
||||
case S_CRTM_VERSION:
|
||||
name = tcpa_pc_event_id_strings[pc_event->event_id];
|
||||
name = tcpa_pc_event_id_strings[do_endian_conversion
|
||||
(pc_event->event_id)];
|
||||
n_len = strlen(name);
|
||||
break;
|
||||
/* hash data */
|
||||
@ -188,7 +209,8 @@ static int get_event_name(char *dest, struct tcpa_event *event,
|
||||
case OPTION_ROM_MICROCODE:
|
||||
case S_CRTM_CONTENTS:
|
||||
case POST_CONTENTS:
|
||||
name = tcpa_pc_event_id_strings[pc_event->event_id];
|
||||
name = tcpa_pc_event_id_strings[do_endian_conversion
|
||||
(pc_event->event_id)];
|
||||
n_len = strlen(name);
|
||||
for (i = 0; i < 20; i++)
|
||||
d_len += sprintf(&data[2*i], "%02x",
|
||||
@ -209,13 +231,24 @@ static int get_event_name(char *dest, struct tcpa_event *event,
|
||||
static int tpm_binary_bios_measurements_show(struct seq_file *m, void *v)
|
||||
{
|
||||
struct tcpa_event *event = v;
|
||||
char *data = v;
|
||||
struct tcpa_event temp_event;
|
||||
char *tempPtr;
|
||||
int i;
|
||||
|
||||
for (i = 0; i < sizeof(struct tcpa_event) + event->event_size; i++)
|
||||
seq_putc(m, data[i]);
|
||||
memcpy(&temp_event, event, sizeof(struct tcpa_event));
|
||||
|
||||
/* convert raw integers for endianness */
|
||||
temp_event.pcr_index = do_endian_conversion(event->pcr_index);
|
||||
temp_event.event_type = do_endian_conversion(event->event_type);
|
||||
temp_event.event_size = do_endian_conversion(event->event_size);
|
||||
|
||||
tempPtr = (char *)&temp_event;
|
||||
|
||||
for (i = 0; i < sizeof(struct tcpa_event) + temp_event.event_size; i++)
|
||||
seq_putc(m, tempPtr[i]);
|
||||
|
||||
return 0;
|
||||
|
||||
}
|
||||
|
||||
static int tpm_bios_measurements_release(struct inode *inode,
|
||||
@ -238,7 +271,7 @@ static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v)
|
||||
char *eventname;
|
||||
struct tcpa_event *event = v;
|
||||
unsigned char *event_entry =
|
||||
(unsigned char *) (v + sizeof(struct tcpa_event));
|
||||
(unsigned char *)(v + sizeof(struct tcpa_event));
|
||||
|
||||
eventname = kmalloc(MAX_TEXT_EVENT, GFP_KERNEL);
|
||||
if (!eventname) {
|
||||
@ -247,13 +280,14 @@ static int tpm_ascii_bios_measurements_show(struct seq_file *m, void *v)
|
||||
return -EFAULT;
|
||||
}
|
||||
|
||||
seq_printf(m, "%2d ", event->pcr_index);
|
||||
/* 1st: PCR */
|
||||
seq_printf(m, "%2d ", do_endian_conversion(event->pcr_index));
|
||||
|
||||
/* 2nd: SHA1 */
|
||||
seq_printf(m, "%20phN", event->pcr_value);
|
||||
|
||||
/* 3rd: event type identifier */
|
||||
seq_printf(m, " %02x", event->event_type);
|
||||
seq_printf(m, " %02x", do_endian_conversion(event->event_type));
|
||||
|
||||
len += get_event_name(eventname, event, event_entry);
|
||||
|
||||
|
||||
@ -6,6 +6,12 @@
|
||||
#define MAX_TEXT_EVENT 1000 /* Max event string length */
|
||||
#define ACPI_TCPA_SIG "TCPA" /* 0x41504354 /'TCPA' */
|
||||
|
||||
#ifdef CONFIG_PPC64
|
||||
#define do_endian_conversion(x) be32_to_cpu(x)
|
||||
#else
|
||||
#define do_endian_conversion(x) x
|
||||
#endif
|
||||
|
||||
enum bios_platform_class {
|
||||
BIOS_CLIENT = 0x00,
|
||||
BIOS_SERVER = 0x01,
|
||||
|
||||
Loading…
Reference in New Issue
Block a user