include/slrt.h: new file with definitions for SLRT

Signed-off-by: Krystian Hebel <[email protected]>

Author: krystian-hebel

include/slrt.h

@@ -0,0 +1,132 @@
+#ifndef __SLRT_H__
+#define __SLRT_H__
+
+#include <defs.h>
+#include <types.h>
+
+struct slr_entry_hdr {
+    u16 tag;
+    u16 size;
+} __packed;
+
+#define SLR_ENTRY_INVALID           0x0000
+#define SLR_ENTRY_DL_INFO           0x0001
+#define SLR_ENTRY_LOG_INFO          0x0002
+#define SLR_ENTRY_DRTM_POLICY       0x0003
+#define SLR_ENTRY_INTEL_INFO        0x0004
+#define SLR_ENTRY_AMD_INFO          0x0005
+#define SLR_ENTRY_ARM_INFO          0x0006
+#define SLR_ENTRY_UEFI_INFO         0x0007
+#define SLR_ENTRY_UEFI_CONFIG       0x0008
+#define SLR_ENTRY_END               0xffff
+
+struct slr_table {
+    u32 magic;
+    u16 revision;
+    u16 architecture;
+    u32 size;
+    u32 max_size;
+    /* Not really a flex array, don't use it that way! */
+    struct slr_entry_hdr entries[];
+} __packed;
+
+struct slr_bl_context {
+    u16 bootloader;
+    u16 reserved;
+    u64 context;
+} __packed;
+
+#define SLR_BOOTLOADER_GRUB         1
+
+struct slr_entry_dl_info {
+    struct slr_entry_hdr hdr;
+    struct slr_bl_context bl_context;
+    u64 dl_handler;
+    u64 dce_base;
+    u32 dce_size;
+    u64 dlme_base;
+    u32 dlme_size;
+    u32 dlme_entry;     /* Offset from dlme_base */
+} __packed;
+
+struct slr_entry_log_info {
+    struct slr_entry_hdr hdr;
+    u16 format;
+    u16 reserved;
+    u64 addr;
+    u32 size;
+} __packed;
+
+#define SLR_LOG_FORMAT_TPM12_TXT     1
+#define SLR_LOG_FORMAT_TPM20_TCG     2
+
+#define TPM_EVENT_INFO_LENGTH       20
+
+struct slr_policy_entry {
+    u16 pcr;
+    u16 entity_type;
+    u16 flags;
+    u16 reserved;
+    u64 entity;
+    u64 size;
+    char evt_info[TPM_EVENT_INFO_LENGTH];
+} __packed;
+
+/* Constants for entity_type */
+#define SLR_ET_UNSPECIFIED          0x0000
+#define SLR_ET_SLRT                 0x0001
+#define SLR_ET_LINUX_BOOT_PARAMS    0x0002
+#define SLR_ET_LINUX_SETUP_DATA     0x0003
+#define SLR_ET_CMDLINE              0x0004
+#define SLR_ET_UEFI_MEMMAP          0x0005
+#define SLR_ET_RAMDISK              0x0006
+#define SLR_ET_MULTIBOOT2_INFO      0x0007
+#define SLR_ET_MULTIBOOT2_MODULE    0x0008
+// values 0x0009-0x000f reserved for future use
+// TXT-specific:
+#define SLR_ET_TXT_OS2MLE           0x0010
+#define SLR_ET_UNUSED               0xffff
+
+/* Constants for flags */
+#define SLR_POLICY_FLAG_MEASURED    0x1
+#define SLR_POLICY_IMPLICIT_SIZE    0x2
+
+struct slr_entry_policy {
+    struct slr_entry_hdr hdr;
+    u16 revision;
+    u16 nr_entries;
+    struct slr_policy_entry policy_entries[];
+} __packed;
+
+extern struct slr_table bootloader_data;
+
+static inline void *end_of_slrt(void)
+{
+    return _p(_u(&bootloader_data) + bootloader_data.size);
+}
+
+static inline void *next_entry(void* t)
+{
+    void *x = t + ((struct slr_entry_hdr*)t)->size;
+    return x < end_of_slrt() ? x : NULL;
+}
+
+static inline void *next_entry_with_tag(void* _t, u16 tag)
+{
+    struct slr_entry_hdr *t = _t;
+    if (t == NULL) {
+        t = &bootloader_data.entries[0];
+        if ( t->tag == tag )
+            return (void*)t < end_of_slrt() ? t : NULL;
+    }
+
+    while ( t->tag != SLR_ENTRY_END )
+    {
+        t = next_entry(t);
+        if ( t->tag == tag )
+            return (void*)t < end_of_slrt() ? t : NULL;
+    }
+    return NULL;
+}
+
+#endif /* __SLRT_H__ */