x86, suspend: Restore MISC_ENABLE MSR in realmode wakeup

[pandora-kernel.git] / arch / x86 / kernel / acpi / sleep.c

diff --git a/arch/x86/kernel/acpi/sleep.c b/arch/x86/kernel/acpi/sleep.c
index 18a857b..103b6ab 100644 (file)
--- a/arch/x86/kernel/acpi/sleep.c
+++ b/arch/x86/kernel/acpi/sleep.c
@@ -77,6 +77,12 @@ int acpi_suspend_lowlevel(void)
 
        header->pmode_cr0 = read_cr0();
        header->pmode_cr4 = read_cr4_safe();
+       header->pmode_behavior = 0;
+       if (!rdmsr_safe(MSR_IA32_MISC_ENABLE,
+                       &header->pmode_misc_en_low,
+                       &header->pmode_misc_en_high))
+               header->pmode_behavior |=
+                       (1 << WAKEUP_BEHAVIOR_RESTORE_MISC_ENABLE);
        header->realmode_flags = acpi_realmode_flags;
        header->real_magic = 0x12345678;