diff options
Diffstat (limited to 'src/drivers/tpm')
| -rw-r--r-- | src/drivers/tpm/ppi.c | 34 |
1 files changed, 26 insertions, 8 deletions
diff --git a/src/drivers/tpm/ppi.c b/src/drivers/tpm/ppi.c index 6f12b411ba..d63b8f811b 100644 --- a/src/drivers/tpm/ppi.c +++ b/src/drivers/tpm/ppi.c @@ -5,6 +5,7 @@ #include <acpi/acpi_device.h> #include <cbmem.h> #include <console/console.h> +#include <security/tpm/tss.h> #include "tpm_ppi.h" @@ -35,6 +36,8 @@ static void set_package_element_name(const char *package_name, unsigned int elem /* PPI function is passed in src_op. Converted to Local2. Clobbers Local1 and Local2 */ static void verify_supported_ppi(uint8_t src_op) { + enum tpm_family family = tlcl_get_family(); + /* * Old OSes incorrectly pass a Buffer instead of a Package. * See TCG Physical Presence Interface Specification Chapter 8.1.2 for details. @@ -62,7 +65,7 @@ static void verify_supported_ppi(uint8_t src_op) acpigen_write_store(); acpigen_emit_namestring("^FSUP"); acpigen_emit_byte(LOCAL2_OP); - acpigen_emit_byte(CONFIG(TPM1) ? ONE_OP : ZERO_OP); + acpigen_emit_byte(family == TPM_1 ? ONE_OP : ZERO_OP); acpigen_emit_byte(LOCAL1_OP); acpigen_write_if_lequal_op_int(LOCAL1_OP, 0); @@ -84,7 +87,7 @@ static void verify_supported_ppi(uint8_t src_op) acpigen_write_store(); acpigen_emit_namestring("^FSUP"); acpigen_emit_byte(LOCAL2_OP); - acpigen_emit_byte(CONFIG(TPM1) ? ZERO_OP : ONE_OP); + acpigen_emit_byte(family == TPM_1 ? ZERO_OP : ONE_OP); acpigen_emit_byte(LOCAL1_OP); acpigen_write_if_lequal_op_int(LOCAL1_OP, 1); @@ -114,7 +117,7 @@ static void tpm_ppi_func0_cb(void *arg) */ static void tpm_ppi_func1_cb(void *arg) { - if (CONFIG(TPM2)) + if (tlcl_get_family() == TPM_2) /* Interface version: 1.3 */ acpigen_write_return_string("1.3"); else @@ -400,6 +403,8 @@ static void tpm_ppi_func7_cb(void *arg) */ static void tpm_ppi_func8_cb(void *arg) { + enum tpm_family family = tlcl_get_family(); + acpigen_write_to_integer(ARG1_OP, LOCAL0_OP); /* Revision 1 */ @@ -410,7 +415,7 @@ static void tpm_ppi_func8_cb(void *arg) acpigen_write_store(); acpigen_emit_namestring("^FSUP"); acpigen_emit_byte(LOCAL2_OP); - acpigen_emit_byte(CONFIG(TPM1) ? ONE_OP : ZERO_OP); + acpigen_emit_byte(family == TPM_1 ? ONE_OP : ZERO_OP); acpigen_emit_byte(LOCAL1_OP); acpigen_write_if_lequal_op_int(LOCAL1_OP, 0); acpigen_write_return_byte(0); /* Not implemented */ @@ -418,7 +423,7 @@ static void tpm_ppi_func8_cb(void *arg) // FIXME: Only advertise supported functions - if (CONFIG(TPM1)) { + if (family == TPM_1) { /* * Some functions do not require PP depending on configuration. * Those aren't listed here, so the 'required PP' is always set for those. @@ -434,7 +439,7 @@ static void tpm_ppi_func8_cb(void *arg) acpigen_write_return_integer(PPI8_RET_ALLOWED); acpigen_pop_len(); /* Pop : If */ } - } else if (CONFIG(TPM2)) { + } else if (family == TPM_2) { /* * Some functions do not require PP depending on configuration. * Those aren't listed here, so the 'required PP' is always set for those. @@ -564,6 +569,12 @@ void tpm_ppi_acpi_fill_ssdt(const struct device *dev) printk(BIOS_DEBUG, "PPI: Pending OS request: 0x%x (0x%x)\n", ppib->pprq, ppib->pprm); printk(BIOS_DEBUG, "PPI: OS response: CMD 0x%x = 0x%x\n", ppib->lppr, ppib->pprp); + enum tpm_family family = tlcl_get_family(); + if (family == TPM_UNKNOWN) { + printk(BIOS_WARN, "PPI: %s: aborting, because no TPM detected\n", __func__); + return; + } + /* Clear unsupported fields */ ppib->next_step = 0; ppib->ppin = 1; // Not used by ACPI. Read by EDK-2, must be 1. @@ -574,7 +585,7 @@ void tpm_ppi_acpi_fill_ssdt(const struct device *dev) bool found = false; /* Fill in defaults, the TPM command executor may overwrite this list */ memset(ppib->func, 0, sizeof(ppib->func)); - if (CONFIG(TPM1)) { + if (family == TPM_1) { for (size_t i = 0; i < ARRAY_SIZE(tpm1_funcs); i++) { ppib->func[tpm1_funcs[i]] = 1; if (ppib->pprq == tpm1_funcs[i]) @@ -706,17 +717,24 @@ void tpm_ppi_acpi_fill_ssdt(const struct device *dev) void lb_tpm_ppi(struct lb_header *header) { struct lb_tpm_physical_presence *tpm_ppi; + enum tpm_family family; void *ppib; ppib = cbmem_find(CBMEM_ID_TPM_PPI); if (!ppib) return; + family = tlcl_get_family(); + if (family == TPM_UNKNOWN) { + printk(BIOS_WARN, "PPI: %s: aborting, because no TPM detected\n", __func__); + return; + } + tpm_ppi = (struct lb_tpm_physical_presence *)lb_new_record(header); tpm_ppi->tag = LB_TAG_TPM_PPI_HANDOFF; tpm_ppi->size = sizeof(*tpm_ppi); tpm_ppi->ppi_address = (uintptr_t)ppib; - tpm_ppi->tpm_version = CONFIG(TPM1) ? LB_TPM_VERSION_TPM_VERSION_1_2 : + tpm_ppi->tpm_version = family == TPM_1 ? LB_TPM_VERSION_TPM_VERSION_1_2 : LB_TPM_VERSION_TPM_VERSION_2; tpm_ppi->ppi_version = BCD(1, 3); |