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x86 / tboot / ACPI: Fail extended mode reduced hardware sleep

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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: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Ben Guthro <benjamin.guthro@citrix.com>
Cc: tboot-devel@lists.sourceforge.net
Cc: Gang Wei <gang.wei@intel.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Ben Guthro 2013-07-30 09:22:37 -04:00 committed by Rafael J. Wysocki
parent be6b25d15f
commit 01c6a6afd5
1 changed files with 10 additions and 0 deletions
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10
arch/x86/kernel/tboot.c
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@ -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;
}