security/tpm: Drop CAR_GLOBAL_MIGRATION support
Change-Id: I1c09eda6164efb390de4626f52aafba59962f9c4
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37029
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/drivers/spi/tpm/tpm.c b/src/drivers/spi/tpm/tpm.c
index 270b15b..d3d36c9 100644
--- a/src/drivers/spi/tpm/tpm.c
+++ b/src/drivers/spi/tpm/tpm.c
@@ -15,7 +15,6 @@
* Specification Revision 00.43".
*/
-#include <arch/early_variables.h>
#include <assert.h>
#include <commonlib/endian.h>
#include <console/console.h>
@@ -40,10 +39,10 @@
#define CR50_TIMEOUT_INIT_MS 30000 /* Very long timeout for TPM init */
/* SPI slave structure for TPM device. */
-static struct spi_slave g_spi_slave CAR_GLOBAL;
+static struct spi_slave g_spi_slave;
/* Cached TPM device identification. */
-static struct tpm2_info g_tpm_info CAR_GLOBAL;
+static struct tpm2_info g_tpm_info;
/*
* TODO(vbendeb): make CONFIG_DEBUG_TPM an int to allow different level of
@@ -61,16 +60,16 @@
void tpm2_get_info(struct tpm2_info *info)
{
- *info = car_get_var(g_tpm_info);
+ *info = g_tpm_info;
}
__weak int tis_plat_irq_status(void)
{
- static int warning_displayed CAR_GLOBAL;
+ static int warning_displayed;
- if (!car_get_var(warning_displayed)) {
+ if (!warning_displayed) {
printk(BIOS_WARNING, "WARNING: tis_plat_irq_status() not implemented, wasting 10ms to wait on Cr50!\n");
- car_set_var(warning_displayed, 1);
+ warning_displayed = 1;
}
mdelay(10);
@@ -109,9 +108,8 @@
uint8_t byte;
int i;
struct stopwatch sw;
- static int tpm_sync_needed CAR_GLOBAL;
- static struct stopwatch wake_up_sw CAR_GLOBAL;
- struct spi_slave *spi_slave = car_get_var_ptr(&g_spi_slave);
+ static int tpm_sync_needed;
+ static struct stopwatch wake_up_sw;
/*
* First Cr50 access in each coreboot stage where TPM is used will be
* prepended by a wake up pulse on the CS line.
@@ -119,7 +117,7 @@
int wakeup_needed = 1;
/* Wait for TPM to finish previous transaction if needed */
- if (car_get_var(tpm_sync_needed)) {
+ if (tpm_sync_needed) {
tpm_sync();
/*
* During the first invocation of this function on each stage
@@ -127,17 +125,17 @@
* value is zero), during all following invocations the
* stopwatch below is guaranteed to be started.
*/
- if (!stopwatch_expired(car_get_var_ptr(&wake_up_sw)))
+ if (!stopwatch_expired(&wake_up_sw))
wakeup_needed = 0;
} else {
- car_set_var(tpm_sync_needed, 1);
+ tpm_sync_needed = 1;
}
if (wakeup_needed) {
/* Just in case Cr50 is asleep. */
- spi_claim_bus(spi_slave);
+ spi_claim_bus(&g_spi_slave);
udelay(1);
- spi_release_bus(spi_slave);
+ spi_release_bus(&g_spi_slave);
udelay(100);
}
@@ -146,7 +144,7 @@
* SPI slave activity, let's be conservative and limit the
* window to 900 ms.
*/
- stopwatch_init_msecs_expire(car_get_var_ptr(&wake_up_sw), 900);
+ stopwatch_init_msecs_expire(&wake_up_sw, 900);
/*
* The first byte of the frame header encodes the transaction type
@@ -160,7 +158,7 @@
header.body[i + 1] = (addr >> (8 * (2 - i))) & 0xff;
/* CS assert wakes up the slave. */
- spi_claim_bus(spi_slave);
+ spi_claim_bus(&g_spi_slave);
/*
* The TCG TPM over SPI specification introduces the notion of SPI
@@ -187,7 +185,7 @@
* to require to stall the master, this would present an issue.
* crosbug.com/p/52132 has been opened to track this.
*/
- spi_xfer(spi_slave, header.body, sizeof(header.body), NULL, 0);
+ spi_xfer(&g_spi_slave, header.body, sizeof(header.body), NULL, 0);
/*
* Now poll the bus until TPM removes the stall bit. Give it up to 100
@@ -198,10 +196,10 @@
do {
if (stopwatch_expired(&sw)) {
printk(BIOS_ERR, "TPM flow control failure\n");
- spi_release_bus(spi_slave);
+ spi_release_bus(&g_spi_slave);
return 0;
}
- spi_xfer(spi_slave, NULL, 0, &byte, 1);
+ spi_xfer(&g_spi_slave, NULL, 0, &byte, 1);
} while (!(byte & 1));
return 1;
}
@@ -214,11 +212,10 @@
size_t bytes, const uint8_t *buffer,
int force)
{
- static char prev_prefix CAR_GLOBAL;
- static unsigned prev_reg CAR_GLOBAL;
- static int current_char CAR_GLOBAL;
+ static char prev_prefix;
+ static unsigned int prev_reg;
+ static int current_char;
const int BYTES_PER_LINE = 32;
- int *current_char_ptr = car_get_var_ptr(¤t_char);
if (!force) {
if (!debug_level_)
@@ -232,12 +229,11 @@
* Do not print register address again if the last dump print was for
* that register.
*/
- if ((car_get_var(prev_prefix) != *prefix) ||
- (car_get_var(prev_reg) != reg)) {
- car_set_var(prev_prefix, *prefix);
- car_set_var(prev_reg, reg);
+ if (prev_prefix != *prefix || (prev_reg != reg)) {
+ prev_prefix = *prefix;
+ prev_reg = reg;
printk(BIOS_DEBUG, "\n%s %2.2x:", prefix, reg);
- *current_char_ptr = 0;
+ current_char = 0;
}
if ((reg != TPM_DATA_FIFO_REG) && (bytes == 4)) {
@@ -254,12 +250,12 @@
* quantiites is printed byte at a time.
*/
for (i = 0; i < bytes; i++) {
- if (*current_char_ptr &&
- !(*current_char_ptr % BYTES_PER_LINE)) {
+ if (current_char &&
+ !(current_char % BYTES_PER_LINE)) {
printk(BIOS_DEBUG, "\n ");
- *current_char_ptr = 0;
+ current_char = 0;
}
- (*current_char_ptr)++;
+ (current_char)++;
printk(BIOS_DEBUG, " %2.2x", buffer[i]);
}
}
@@ -271,8 +267,7 @@
*/
static void write_bytes(const void *buffer, size_t bytes)
{
- struct spi_slave *spi_slave = car_get_var_ptr(&g_spi_slave);
- spi_xfer(spi_slave, buffer, bytes, NULL, 0);
+ spi_xfer(&g_spi_slave, buffer, bytes, NULL, 0);
}
/*
@@ -281,8 +276,7 @@
*/
static void read_bytes(void *buffer, size_t bytes)
{
- struct spi_slave *spi_slave = car_get_var_ptr(&g_spi_slave);
- spi_xfer(spi_slave, NULL, 0, buffer, bytes);
+ spi_xfer(&g_spi_slave, NULL, 0, buffer, bytes);
}
/*
@@ -293,12 +287,11 @@
*/
static int tpm2_write_reg(unsigned int reg_number, const void *buffer, size_t bytes)
{
- struct spi_slave *spi_slave = car_get_var_ptr(&g_spi_slave);
trace_dump("W", reg_number, bytes, buffer, 0);
if (!start_transaction(false, bytes, reg_number))
return 0;
write_bytes(buffer, bytes);
- spi_release_bus(spi_slave);
+ spi_release_bus(&g_spi_slave);
return 1;
}
@@ -311,13 +304,12 @@
*/
static int tpm2_read_reg(unsigned int reg_number, void *buffer, size_t bytes)
{
- struct spi_slave *spi_slave = car_get_var_ptr(&g_spi_slave);
if (!start_transaction(true, bytes, reg_number)) {
memset(buffer, 0, bytes);
return 0;
}
read_bytes(buffer, bytes);
- spi_release_bus(spi_slave);
+ spi_release_bus(&g_spi_slave);
trace_dump("R", reg_number, bytes, buffer, 0);
return 1;
}
@@ -424,10 +416,8 @@
uint32_t did_vid, status;
uint8_t cmd;
int retries;
- struct tpm2_info *tpm_info = car_get_var_ptr(&g_tpm_info);
- struct spi_slave *spi_slave = car_get_var_ptr(&g_spi_slave);
- memcpy(spi_slave, spi_if, sizeof(*spi_if));
+ memcpy(&g_spi_slave, spi_if, sizeof(*spi_if));
/* clear any pending IRQs */
tis_plat_irq_status();
@@ -484,15 +474,15 @@
* structure.
*/
tpm2_read_reg(TPM_RID_REG, &cmd, sizeof(cmd));
- tpm_info->vendor_id = did_vid & 0xffff;
- tpm_info->device_id = did_vid >> 16;
- tpm_info->revision = cmd;
+ g_tpm_info.vendor_id = did_vid & 0xffff;
+ g_tpm_info.device_id = did_vid >> 16;
+ g_tpm_info.revision = cmd;
printk(BIOS_INFO, "Connected to device vid:did:rid of %4.4x:%4.4x:%2.2x\n",
- tpm_info->vendor_id, tpm_info->device_id, tpm_info->revision);
+ g_tpm_info.vendor_id, g_tpm_info.device_id, g_tpm_info.revision);
/* Let's report device FW version if available. */
- if (tpm_info->vendor_id == 0x1ae0) {
+ if (g_tpm_info.vendor_id == 0x1ae0) {
int chunk_count = 0;
size_t chunk_size;
/*
@@ -619,10 +609,9 @@
uint8_t *rsp_body = tpm2_response;
union fifo_transfer_buffer fifo_buffer;
const int HEADER_SIZE = 6;
- struct tpm2_info *tpm_info = car_get_var_ptr(&g_tpm_info);
/* Do not try using an uninitialized TPM. */
- if (!tpm_info->vendor_id)
+ if (!g_tpm_info.vendor_id)
return 0;
/* Skip the two byte tag, read the size field. */