Messages in this thread Patch in this message | | | From | Ben Guthro <> | Subject | [PATCH v7 2/3] x86/tboot: Fail extended mode reduced hardware sleep | Date | Mon, 29 Jul 2013 13:14:14 -0400 |
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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 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> --- arch/x86/kernel/tboot.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/arch/x86/kernel/tboot.c b/arch/x86/kernel/tboot.c index addf7b5..760f431 100644 --- a/arch/x86/kernel/tboot.c +++ b/arch/x86/kernel/tboot.c @@ -301,6 +301,17 @@ 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). Please contact" + " tboot-devel@lists.sourceforge.net mailing list."); + return -1; +} + static atomic_t ap_wfs_count; static int tboot_wait_for_aps(int num_aps) @@ -422,6 +433,7 @@ 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; } -- 1.7.9.5
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