x86/tpm.c: implement event log for TPM2.0

Signed-off-by: Sergii Dmytruk <[email protected]>

xen/arch/x86/include/asm/intel_txt.h

@@ -215,6 +215,39 @@ struct txt_sinit_mle_data {
 	/* Ext Data Elements */
 } __packed;
 
+/* Types of extended data. */
+#define TXT_HEAP_EXTDATA_TYPE_END                    0
+#define TXT_HEAP_EXTDATA_TYPE_BIOS_SPEC_VER          1
+#define TXT_HEAP_EXTDATA_TYPE_ACM                    2
+#define TXT_HEAP_EXTDATA_TYPE_STM                    3
+#define TXT_HEAP_EXTDATA_TYPE_CUSTOM                 4
+#define TXT_HEAP_EXTDATA_TYPE_MADT                   6
+#define TXT_HEAP_EXTDATA_TYPE_EVENT_LOG_POINTER2_1   8
+#define TXT_HEAP_EXTDATA_TYPE_MCFG                   9
+#define TXT_HEAP_EXTDATA_TYPE_TPR_REQ               13
+#define TXT_HEAP_EXTDATA_TYPE_DTPR                  14
+#define TXT_HEAP_EXTDATA_TYPE_CEDT                  15
+
+/*
+ * Self-describing data structure that is used for extensions to TXT heap
+ * tables.
+ */
+struct txt_ext_data_element {
+	uint32_t type;   /* One of TXT_HEAP_EXTDATA_TYPE_*. */
+	uint32_t size;
+	uint8_t data[0]; /* size bytes. */
+} __packed;
+
+/*
+ * Extended data describing TPM 2.0 log.
+ */
+struct heap_event_log_pointer_element2_1 {
+	uint64_t physical_address;
+	uint32_t allocated_event_container_size;
+	uint32_t first_record_offset;
+	uint32_t next_record_offset;
+} __packed;
+
 /*
  * Functions to extract data from the Intel TXT Heap Memory. The layout
  * of the heap is as follows: