smbios: Add API to generate SMBIOS type 43 TPM Device

Based on DMTF SMBIOS Specification 3.1.0.

Signed-off-by: Michał Żygowski <michal.zygowski@3mdeb.com>
Change-Id: Ia2db29f8bc4cfbc6648bb2cabad074d9ea583ca9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64048
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Christian Walter <christian.walter@9elements.com>

2 files changed, 48 insertions, 0 deletions

diff --git a/src/arch/x86/smbios.c b/src/arch/x86/smbios.c
index 4f8de420c365..0c1a877899dd 100644
--- a/src/arch/x86/smbios.c
+++ b/src/arch/x86/smbios.c
@@ -1108,6 +1108,29 @@ int smbios_write_type41(unsigned long *current, int *handle,
 	return len;
 }
 
+int smbios_write_type43(unsigned long *current, int *handle, const u32 vendor_id,
+			const u8 major_spec_ver, const u8 minor_spec_ver,
+			const u32 fw_ver1, const u32 fw_ver2, const char *description,
+			const u64 characteristics, const u32 oem_defined)
+{
+	struct smbios_type43 *t = smbios_carve_table(*current, SMBIOS_TPM_DEVICE,
+						     sizeof(*t), *handle);
+
+	t->vendor_id = vendor_id;
+	t->major_spec_ver = major_spec_ver;
+	t->minor_spec_ver = minor_spec_ver;
+	t->fw_ver1 = fw_ver1;
+	t->fw_ver2 = fw_ver2;
+	t->characteristics = characteristics;
+	t->oem_defined = oem_defined;
+	t->description = smbios_add_string(t->eos, description);
+
+	const int len = smbios_full_table_len(&t->header, t->eos);
+	*current += len;
+	*handle += 1;
+	return len;
+}
+
 static int smbios_write_type127(unsigned long *current, int handle)
 {
 	struct smbios_type127 *t = smbios_carve_table(*current, SMBIOS_END_OF_TABLE,
diff --git a/src/include/smbios.h b/src/include/smbios.h
index 605840d5a1a8..9c438437e8a8 100644
--- a/src/include/smbios.h
+++ b/src/include/smbios.h
@@ -35,6 +35,11 @@ int smbios_write_type41(unsigned long *current, int *handle,
 			const char *name, u8 instance, u16 segment,
 			u8 bus, u8 device, u8 function, u8 device_type);
 
+int smbios_write_type43(unsigned long *current, int *handle, const u32 vendor_id,
+			const u8 major_spec_ver, const u8 minor_spec_ver,
+			const u32 fw_ver1, const u32 fw_ver2, const char *description,
+			const u64 characteristics, const u32 oem_defined);
+
 struct device;
 int get_smbios_data(struct device *dev, int *handle, unsigned long *current);
 
@@ -253,6 +258,7 @@ typedef enum {
 	SMBIOS_SYSTEM_BOOT_INFORMATION = 32,
 	SMBIOS_IPMI_DEVICE_INFORMATION = 38,
 	SMBIOS_ONBOARD_DEVICES_EXTENDED_INFORMATION = 41,
+	SMBIOS_TPM_DEVICE = 43,
 	SMBIOS_END_OF_TABLE = 127,
 } smbios_struct_type_t;
 
@@ -976,6 +982,25 @@ struct smbios_type41 {
 	u8 eos[2];
 } __packed;
 
+
+#define SMBIOS_TPM_DEVICE_CHARACTERISTICS_NOT_SUPPORTED (1ULL << 2)
+#define SMBIOS_TPM_DEVICE_FAMILY_CONFIGURABLE_VIA_FW_UPD (1ULL << 3)
+#define SMBIOS_TPM_DEVICE_FAMILY_CONFIGURABLE_VIA_PLATFORM_SW_SUPPORT (1ULL << 4)
+#define SMBIOS_TPM_DEVICE_FAMILY_CONFIGURABLE_VIA_OEM_PROPRIETARY (1ULL << 5)
+
+struct smbios_type43 {
+	struct smbios_header header;
+	u32 vendor_id;
+	u8 major_spec_ver;
+	u8 minor_spec_ver;
+	u32 fw_ver1;
+	u32 fw_ver2;
+	u8 description;
+	u64 characteristics;
+	u32 oem_defined;
+	u8 eos[2];
+} __packed;
+
 struct smbios_type127 {
 	struct smbios_header header;
 	u8 eos[2];