On Monday, July 29, 2013 01:14:14 PM Ben Guthro wrote:
> 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 <jbeul...@suse.com>
> Signed-off-by: Ben Guthro <benjamin.gut...@citrix.com>
> Cc: tboot-devel@lists.sourceforge.net
> Cc: Gang Wei <gang....@intel.com>
> Reviewed-by: Konrad Rzeszutek Wilk <konrad.w...@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;
Please use a meaningful error code here. For example -ENODEV.
> +}
> +
> 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;
> }
Thanks,
Rafael
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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