| 2139c9c8 | 09-Nov-2018 |
Varun Wadekar <vwadekar@nvidia.com> |
Tegra186: system resume from TZSRAM memory
TZSRAM loses power during System suspend, so the entire contents
are copied to TZDRAM before Sysem Suspend entry. The warmboot code
verifies and restores t
Tegra186: system resume from TZSRAM memory
TZSRAM loses power during System suspend, so the entire contents
are copied to TZDRAM before Sysem Suspend entry. The warmboot code
verifies and restores the contents to TZSRAM during System Resume.
This patch removes the code that sets up CPU vector to point to
TZSRAM during System Resume as a result. The trampoline code can
also be completely removed as a result.
Change-Id: I2830eb1db16efef3dfd96c4e3afc41a307588ca1
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
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| 4eed9c84 | 19-Jul-2018 |
Jeetesh Burman <jburman@nvidia.com> |
Tegra186: add SE support to generate SHA256 of TZRAM
The BL3-1 firmware code is stored in TZSRAM on Tegra186 platforms. This
memory loses power when we enter System Suspend and so its contents are
s
Tegra186: add SE support to generate SHA256 of TZRAM
The BL3-1 firmware code is stored in TZSRAM on Tegra186 platforms. This
memory loses power when we enter System Suspend and so its contents are
stored to TZDRAM, before entry. This opens up an attack vector where the
TZDRAM contents might be tampered with when we are in the System Suspend
mode. To mitigate this attack the SE engine calculates the hash of entire
TZSRAM and stores it in PMC scratch, before we copy data to TZDRAM. The
WB0 code will validate the TZDRAM and match the hash with the one in PMC
scratch.
This patch adds driver for the SE engine, with APIs to calculate the hash
and store SE SHA256 hash-result to PMC scratch registers.
Change-Id: Ib487d5629225d3d99bd35d44f0402d6d3cf27ddf
Signed-off-by: Jeetesh Burman <jburman@nvidia.com>
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| 539c62d7 | 10-Nov-2017 |
Varun Wadekar <vwadekar@nvidia.com> |
Tegra186: save system suspend entry marker to TZDRAM
This patch adds support to save the system suspend entry and exit
markers to TZDRAM to help the trampoline code decide if the current
warmboot is
Tegra186: save system suspend entry marker to TZDRAM
This patch adds support to save the system suspend entry and exit
markers to TZDRAM to help the trampoline code decide if the current
warmboot is actually an exit from System Suspend.
The Tegra186 platform handler sets the system suspend entry marker
before entering SC7 state and the trampoline flips the state back to
system resume, on exiting SC7.
Change-Id: I29d73f1693c89ebc8d19d7abb1df1e460eb5558e
Signed-off-by: Varun Wadekar <vwadekar@nvidia.com>
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