On Tuesday, July 30, 2013 08:24:51 AM Ben Guthro wrote:
> In version 3.4 acpi_os_prepare_sleep() got introduced in parallel with
> reduced hardware sleep support, and the two changes didn't get
> synchronized: The new code doesn't call the hook function (if so
> requested). Fix this, requiring a new callback to be added to acpica
> to be called back during this reduced hardware sleep.
>
> This requires adjusting TXT, but the adjustments only go as far as
> failing the extended mode call (since, looking at the TXT interface,
> there doesn't even appear to be precautions to deal with that
> alternative interface).
>
> The xen hypervisor change underlying this is commit 62d1a69 ("ACPI: support
> v5 (reduced HW) sleep interface") on the master branch of
> git://xenbits.xen.org/xen.git.
>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
> Signed-off-by: Ben Guthro <benjamin.guthro@xxxxxxxxxx>
> Cc: Richard L Maliszewski <richard.l.maliszewski@xxxxxxxxx>
> Cc: Gang Wei <gang.wei@xxxxxxxxx>
> Cc: Shane Wang <shane.wang@xxxxxxxxx>
> Cc: Bob Moore <robert.moore@xxxxxxxxx>
> Cc: Rafael J. Wysocki <rjw@xxxxxxx>
> Cc: linux-acpi@xxxxxxxxxxxxxxx
> Cc: tboot-devel@xxxxxxxxxxxxxxxxxxxxx
>
> v2: Extend description to include reference to hypervisor side change
> v3: Split into multiple patches, separating subsystems
> Remove bool parameters, in favor of u8
> v4: Remove linux/acpi.h dependencies
> Further patch split to break out acpica from OSL
> More bool vs u8 fixes
> v5: Fix build of consumers of acpi_os_prepare_sleep() interface change,
> so intermediate builds of partial patch series will not fail.
> v6: Rebased to linux-pm linux-next branch
> Added warning in tboot early return code
> Added Reviewed-by lines
> v7: Add separate acpi_os_prepare_extended_sleep() interface
> Remove OSL acpica changes introduced in v4
> v8: Return meaningful error code in tboot error path
>
> Ben Guthro (3):
> x86/acpi: Introduce acpi_os_prepare_extended_sleep callback for
> extended sleep path
> x86/tboot: Fail extended mode reduced hardware sleep
> xen/acpi: notify xen when reduced hardware sleep is available
>
> arch/x86/kernel/tboot.c | 12 +++++++++++
> drivers/acpi/acpica/hwesleep.c | 9 +++++++++
> drivers/acpi/osl.c | 24 ++++++++++++++++++++++
> drivers/xen/acpi.c | 41 ++++++++++++++++++++++++++------------
> include/linux/acpi.h | 7 +++++++
> include/xen/acpi.h | 8 ++++++--
> include/xen/interface/platform.h | 7 ++++---
> 7 files changed, 90 insertions(+), 18 deletions(-)
Please modify [2/3] as requested in the other message, [1/3] and [3/3] are OK
and don't need to be resent.
Thanks,
Rafael
--
I speak only for myself.
Rafael J. Wysocki, Intel Open Source Technology Center.
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