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Diffstat (limited to 'arch/x86/kernel/tboot.c')
-rw-r--r--arch/x86/kernel/tboot.c21
1 files changed, 12 insertions, 9 deletions
diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index 86c9f91b48ae..c2f1b26141e2 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;