AMDSL: Numerous fixes to make SKL work with the v11 GRUB and Kernel

Some of the changes needed:
 - Latest updates to SLR structures for v11 including the SLR header.
 - Update slr_entry_amd_info with new field for boot params phys addr.
 - Make sure phys addr of DLME entry point is in %ebx before jump.
 - Enable the TPM and initialize the DRTM event log else the kernel gets an
   empty buffer.

Signed-off-by: Ross Philipson <[email protected]>

Author: rossphilipson

head.S

@@ -270,7 +270,7 @@ GLOBAL(_entry)
 	 */
 	/* Linux expects Zero Page address in %esi, it is already there */
 	/* Multiboot2 expects MBI address in %ebx and magic number in %eax */
-	mov	%esi, %ebx
+	mov	%edi, %ebx
 	mov	$MULTIBOOT2_BOOTLOADER_MAGIC, %eax
 	/* Simple payload expects argument on stack followed by return address */
 	push	%esi

include/slrt.h

@@ -31,8 +31,8 @@
  * Common SLRT Table Header
  */
 struct slr_entry_hdr {
-    u16 tag;
-    u16 size;
+    u32 tag;
+    u32 size;
 } __packed;
 
 /*
@@ -62,7 +62,7 @@ struct slr_bl_context {
  */
 struct slr_entry_dl_info {
     struct slr_entry_hdr hdr;
-    u32 dce_size;
+    u64 dce_size;
     u64 dce_base;
     u64 dlme_size;
     u64 dlme_base;
@@ -77,11 +77,24 @@ struct slr_entry_dl_info {
 struct slr_entry_log_info {
     struct slr_entry_hdr hdr;
     u16 format;
-    u16 reserved[3];
+    u16 reserved;
     u32 size;
     u64 addr;
 } __packed;
 
+/*
+ * AMD SKINIT Info table
+ */
+struct slr_entry_amd_info {
+    struct slr_entry_hdr hdr;
+    u64 next;
+    u32 type;
+    u32 len;
+    u64 slrt_size;
+    u64 slrt_base;
+    u64 boot_params_base;
+} __packed;
+
 /* Secure Kernel Loader */
 extern struct slr_table bootloader_data;
 

main.c

@@ -255,13 +255,27 @@ typedef struct {
 static asm_return_t amdsl_launch()
 {
     struct slr_entry_dl_info *dl_info;
+    struct slr_entry_amd_info *amd_info;
+    struct tpm *tpm;
     asm_return_t ret;
 
+    print("Enter amdsl_launch()\n");
+
+    tpm = enable_tpm();
+    tpm_request_locality(tpm, 2);
+    event_log_init(tpm);
+
+    print("TPM enabled and logging initialized\n");
+
     dl_info = next_entry_with_tag(NULL, SLR_ENTRY_DL_INFO);
+    amd_info = next_entry_with_tag(NULL, SLR_ENTRY_AMD_INFO);
 
     if ( dl_info                                     == NULL
+         || amd_info                                 == NULL
          || dl_info->hdr.size                        != sizeof(*dl_info)
          || end_of_slrt()                             < _p(&dl_info[1])
+         || amd_info->hdr.size                       != sizeof(*amd_info)
+         || end_of_slrt()                             < _p(&amd_info[1])
          || dl_info->dlme_base                       >= 0x100000000ULL
          || dl_info->dlme_base + dl_info->dlme_size  >= 0x100000000ULL
          || dl_info->dlme_entry                      >= dl_info->dlme_size
@@ -290,7 +304,7 @@ static asm_return_t amdsl_launch()
     }
 
     ret.dlme_entry = _p(dl_info->dlme_base + dl_info->dlme_entry);
-    ret.dlme_arg = _p(dl_info->bl_context.context);
+    ret.dlme_arg = _p(amd_info->boot_params_base);
 
     /* End of the line, off to the protected mode entry into the kernel */
     print("dlme_entry:\n");