[0/6] thunderbolt / ACPI: Add support for USB4 _OSC

Message

Mika Westerberg Jan. 26, 2021, 3:57 p.m. UTC

Hi all,

The just released ACPI 6.4 spec [1] adds a new _OSC method that is used to
negotiate OS support for native USB4 features such as PCIe tunneling. This
patch series adds Linux support for the new _OSC and modifies the
Thunderbolt/USB4 driver accordingly to enable/disable tunneling of
different protocols.

There is an additional setting in the firmware connection manager that
allows the BIOS to disable PCIe tunneling, so we add support for this and
also make the software connection manager to switch to this "nopcie"
security level when the _OSC does not allow PCIe tunneling.

This applies on top of thunderbolt.git/next.

[1] https://uefi.org/sites/default/files/resources/ACPI_Spec_6_4_Jan22.pdf

Mario Limonciello (2):
  thunderbolt: Fix possible NULL pointer dereference in tb_acpi_add_link()
  ACPI: Execute platform _OSC also with query bit clear

Mika Westerberg (4):
  thunderbolt: Add support for PCIe tunneling disabled (SL5)
  thunderbolt: Allow disabling XDomain protocol
  ACPI: Add support for native USB4 control _OSC
  thunderbolt: Add support for native USB4 _OSC

 .../ABI/testing/sysfs-bus-thunderbolt         |   2 +
 Documentation/admin-guide/thunderbolt.rst     |   7 ++
 drivers/acpi/bus.c                            | 119 ++++++++++++++++--
 drivers/thunderbolt/acpi.c                    |  67 +++++++++-
 drivers/thunderbolt/domain.c                  |  16 ++-
 drivers/thunderbolt/icm.c                     |   6 +-
 drivers/thunderbolt/nhi.c                     |  27 +++-
 drivers/thunderbolt/switch.c                  |   6 +-
 drivers/thunderbolt/tb.c                      |  22 +++-
 drivers/thunderbolt/tb.h                      |  13 ++
 drivers/thunderbolt/tunnel.c                  |  10 +-
 drivers/thunderbolt/usb4.c                    |  11 +-
 drivers/thunderbolt/xdomain.c                 |   9 ++
 include/linux/acpi.h                          |  10 ++
 include/linux/thunderbolt.h                   |   3 +
 15 files changed, 299 insertions(+), 29 deletions(-)

Comments

Yehezkel Bernat Jan. 26, 2021, 4:37 p.m. UTC | #1

On Tue, Jan 26, 2021 at 5:57 PM Mika Westerberg
<[e-mail]> wrote:
>
> Hi all,
>
> The just released ACPI 6.4 spec [1] adds a new _OSC method that is used to
> negotiate OS support for native USB4 features such as PCIe tunneling. This
> patch series adds Linux support for the new _OSC and modifies the
> Thunderbolt/USB4 driver accordingly to enable/disable tunneling of
> different protocols.
>
> There is an additional setting in the firmware connection manager that
> allows the BIOS to disable PCIe tunneling, so we add support for this and
> also make the software connection manager to switch to this "nopcie"
> security level when the _OSC does not allow PCIe tunneling.
>
> This applies on top of thunderbolt.git/next.
>
> [1] https://uefi.org/sites/default/files/resources/ACPI_Spec_6_4_Jan22.pdf
>
> Mario Limonciello (2):
>   thunderbolt: Fix possible NULL pointer dereference in tb_acpi_add_link()
>   ACPI: Execute platform _OSC also with query bit clear
>
> Mika Westerberg (4):
>   thunderbolt: Add support for PCIe tunneling disabled (SL5)
>   thunderbolt: Allow disabling XDomain protocol
>   ACPI: Add support for native USB4 control _OSC
>   thunderbolt: Add support for native USB4 _OSC
>

For Thunderbolt parts,

    Acked-by: Yehezkel Bernat <[e-mail]>