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Commit 01c6a6af authored by Ben Guthro's avatar Ben Guthro Committed by Rafael J. Wysocki
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x86 / tboot / ACPI: Fail extended mode reduced hardware sleep 



Register for the extended sleep callback from ACPI.

As tboot currently does not support the reduced hardware sleep
interface, fail this extended sleep call.

Signed-off-by: default avatarJan Beulich <jbeulich@suse.com>
Signed-off-by: default avatarBen Guthro <benjamin.guthro@citrix.com>
Cc: tboot-devel@lists.sourceforge.net
Cc: Gang Wei <gang.wei@intel.com>
Reviewed-by: default avatarKonrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent be6b25d1

arch/x86/kernel/tboot.c

+10 −0
Original line number Diff line number Diff line
@@ -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;

}