1 files changed, 12 insertions, 9 deletions

diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index 86c9f91b48a..c2f1b26141e 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -46,6 +46,7 @@
 
 /* Global pointer to shared data; NULL means no measured launch. */
 struct tboot *tboot __read_mostly;
+EXPORT_SYMBOL(tboot);
 
 /* timeout for APs (in secs) to enter wait-for-SIPI state during shutdown */
 #define AP_WAIT_TIMEOUT         1
@@ -175,6 +176,9 @@ static void add_mac_region(phys_addr_t start, unsigned long size)
         struct tboot_mac_region *mr;
         phys_addr_t end = start + size;
 
+        if (tboot->num_mac_regions >= MAX_TB_MAC_REGIONS)
+                panic("tboot: Too many MAC regions\n");
+
         if (start && size) {
                 mr = &tboot->mac_regions[tboot->num_mac_regions++];
                 mr->start = round_down(start, PAGE_SIZE);
@@ -184,18 +188,17 @@ static void add_mac_region(phys_addr_t start, unsigned long size)
 
 static int tboot_setup_sleep(void)
 {
+        int i;
+
         tboot->num_mac_regions = 0;
 
-        /* S3 resume code */
-        add_mac_region(acpi_wakeup_address, WAKEUP_SIZE);
+        for (i = 0; i < e820.nr_map; i++) {
+                if ((e820.map[i].type != E820_RAM)
+                 && (e820.map[i].type != E820_RESERVED_KERN))
+                        continue;
 
-#ifdef CONFIG_X86_TRAMPOLINE
-        /* AP trampoline code */
-        add_mac_region(virt_to_phys(trampoline_base), TRAMPOLINE_SIZE);
-#endif
-
-        /* kernel code + data + bss */
-        add_mac_region(virt_to_phys(_text), _end - _text);
+                add_mac_region(e820.map[i].addr, e820.map[i].size);
+        }
 
         tboot->acpi_sinfo.kernel_s3_resume_vector = acpi_wakeup_address;