1 files changed, 10 insertions, 0 deletions

diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c
index addf7b58f4e8..91a4496db434 100644
--- a/arch/x86/kernel/tboot.c
+++ b/arch/x86/kernel/tboot.c
@@ -301,6 +301,15 @@ static int tboot_sleep(u8 sleep_state, u32 pm1a_control, u32 pm1b_control)
         return 0;
 }
 
+static int tboot_extended_sleep(u8 sleep_state, u32 val_a, u32 val_b)
+{
+        if (!tboot_enabled())
+                return 0;
+
+        pr_warning("tboot is not able to suspend on platforms with reduced hardware sleep (ACPIv5)");
+        return -ENODEV;
+}
+
 static atomic_t ap_wfs_count;
 
 static int tboot_wait_for_aps(int num_aps)
@@ -422,6 +431,7 @@ static __init int tboot_late_init(void)
 #endif
 
         acpi_os_set_prepare_sleep(&tboot_sleep);
+        acpi_os_set_prepare_extended_sleep(&tboot_extended_sleep);
         return 0;
 }