1 files changed, 38 insertions, 2 deletions

diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index afc25ee9964b..868de3d5c39d 100644
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -23,6 +23,15 @@ static unsigned long acpi_realmode;
 static char temp_stack[10240];
 #endif
 
+/* XXX: this macro should move to asm-x86/segment.h and be shared with the
+   boot code... */
+#define GDT_ENTRY(flags, base, limit)		\
+	(((u64)(base & 0xff000000) << 32) |	\
+	 ((u64)flags << 40) |			\
+	 ((u64)(limit & 0x00ff0000) << 32) |	\
+	 ((u64)(base & 0x00ffffff) << 16) |	\
+	 ((u64)(limit & 0x0000ffff)))
+
 /**
  * acpi_save_state_mem - save kernel state
  *
@@ -50,6 +59,29 @@ int acpi_save_state_mem(void)
 
 	header->video_mode = saved_video_mode;
 
+	header->wakeup_jmp_seg = acpi_wakeup_address >> 4;
+
+	/*
+	 * Set up the wakeup GDT.  We set these up as Big Real Mode,
+	 * that is, with limits set to 4 GB.  At least the Lenovo
+	 * Thinkpad X61 is known to need this for the video BIOS
+	 * initialization quirk to work; this is likely to also
+	 * be the case for other laptops or integrated video devices.
+	 */
+
+	/* GDT[0]: GDT self-pointer */
+	header->wakeup_gdt[0] =
+		(u64)(sizeof(header->wakeup_gdt) - 1) +
+		((u64)(acpi_wakeup_address +
+			((char *)&header->wakeup_gdt - (char *)acpi_realmode))
+				<< 16);
+	/* GDT[1]: big real mode-like code segment */
+	header->wakeup_gdt[1] =
+		GDT_ENTRY(0x809b, acpi_wakeup_address, 0xfffff);
+	/* GDT[2]: big real mode-like data segment */
+	header->wakeup_gdt[2] =
+		GDT_ENTRY(0x8093, acpi_wakeup_address, 0xfffff);
+
 #ifndef CONFIG_64BIT
 	store_gdt((struct desc_ptr *)&header->pmode_gdt);
 
@@ -72,7 +104,9 @@ int acpi_save_state_mem(void)
 	saved_magic = 0x12345678;
 #else /* CONFIG_64BIT */
 	header->trampoline_segment = setup_trampoline() >> 4;
-	init_rsp = (unsigned long)temp_stack + 4096;
+#ifdef CONFIG_SMP
+	stack_start.sp = temp_stack + 4096;
+#endif
 	initial_code = (unsigned long)wakeup_long64;
 	saved_magic = 0x123456789abcdef0;
 #endif /* CONFIG_64BIT */
@@ -111,7 +145,7 @@ void __init acpi_reserve_bootmem(void)
 		return;
 	}
 
-	acpi_wakeup_address = acpi_realmode;
+	acpi_wakeup_address = virt_to_phys((void *)acpi_realmode);
 }
 
 
@@ -124,6 +158,8 @@ static int __init acpi_sleep_setup(char *str)
 			acpi_realmode_flags |= 2;
 		if (strncmp(str, "s3_beep", 7) == 0)
 			acpi_realmode_flags |= 4;
+		if (strncmp(str, "old_ordering", 12) == 0)
+			acpi_old_suspend_ordering();
 		str = strchr(str, ',');
 		if (str != NULL)
 			str += strspn(str, ", \t");