[PATCH v9 0/7] Support Trusted Foundations firmware on Tegra30

Dmitry Osipenko
2019-03-03T17:13:29Z

Hello,

This patchset adds support for the Trusted Foundations firmware on
NVIDIA Tegra30. Pretty much all of Tegra30 consumer devices have that
firmware and upstream kernel can't boot on those devices without the
firmware support. This series was tested on Nexus 7, TF300T and Ouya
Tegra30 devices.

Changelog:

v9: - Rebased on recent linux-next, resolved one conflict.

v8: - Replaced BIT() macro with a definition provided by cache-l2x0.h
in the "Support L2 cache maintenance" patch as was suggested by
Russell King in the review comment to v7.

v7: - Fixed kernel booting with CONFIG_TRUSTED_FOUNDATIONS=n by
providing a dummy L2C write_sec implementation in the
"Support L2 cache maintenance" patch.

- Minor clean up: no static variables anymore, replaced
white spaces with a tab in one place, etc.

- Added Michał's and Robert's Tested-by/Signed-off-by to the
patches.

v6: - One patch got messed up accidentally in v5, this is fixed now.

- Squashed "Support L2 cache maintenance done via firmware" patch
into the "Add firmware calls..." patch.

- The l2x0_init() firmware callback is now invoked unconditionally
because it is always a NO-OP on T114+ and is a NO-OP on T20/30
if firmware node is missed in device-tree, hence there is no
need to check the machine's DT compatible as it was done in the
previous versions of the series.

v5: - Fixed machine hanging on disabling D-cache during suspend,
turned out there are slight variations in behaviour between
firmware version in regards to cache-management. Thanks to
Robert Yang for reporting the problem and helping with the
solution.

v4: - Fixed Thumb2-kernel hanging on Tegra20, turned out it was not a
good idea to switch CPU into Thumb2 mode right after jumping into
the reset handler.

- Moved LP2-mode-set firmware call invocation to a later stage to
better replicate what downstream kernel does. This change was
suggested by Robert Yang and fixes system hang on Ouya game
console.

- Added references to the original work made by Michał Mirosław
into commit messages of the relevant patches.

v3: - Implemented suspend-resume support.

- Reworked arm/firmware/trusted_foundations.c a tad. Now cache
is getting properly initialized, cache enabling / disabling is
supported.

v2:
- The "Don't apply CPU erratas in insecure mode" patch got some
cleanup, in particular resolved the messiness in
__tegra_cpu_reset_handler_data.

- Added a comment to tf_cache_write_sec(), justifying the warning
message.

Dmitry Osipenko (7):
ARM: trusted_foundations: Support L2 cache maintenance
ARM: trusted_foundations: Make prepare_idle call to take mode argument
ARM: trusted_foundations: Provide information about whether firmware
is registered
ARM: tegra: Set up L2 cache using Trusted Foundations firmware
ARM: tegra: Don't apply CPU erratas in insecure mode
ARM: tegra: Always boot CPU in ARM-mode
ARM: tegra: Add firmware calls required for suspend-resume on Tegra30

arch/arm/firmware/trusted_foundations.c | 75 +++++++++++++++++++++-
arch/arm/include/asm/firmware.h | 2 +-
arch/arm/include/asm/trusted_foundations.h | 25 ++++++++
arch/arm/mach-tegra/cpuidle-tegra114.c | 3 +-
arch/arm/mach-tegra/pm.c | 49 ++++++++++++++
arch/arm/mach-tegra/reset-handler.S | 50 +++++++++++----
arch/arm/mach-tegra/reset.c | 3 +
arch/arm/mach-tegra/reset.h | 9 ++-
arch/arm/mach-tegra/sleep-tegra20.S | 4 ++
arch/arm/mach-tegra/sleep.S | 14 ++--
arch/arm/mach-tegra/tegra.c | 2 +
11 files changed, 214 insertions(+), 22 deletions(-)

--
2.20.1