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crypto: ccp - Add an S4 restore flow

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[ Upstream commit 0ba2035026 ]

The system will have lost power during S4.  The ring used for TEE
communications needs to be initialized before use.

Fixes: f892a21f51 ("crypto: ccp - use generic power management")
Reported-by: Lars Francke <lars.francke@gmail.com>
Closes: https://lore.kernel.org/platform-driver-x86/CAD-Ua_gfJnQSo8ucS_7ZwzuhoBRJ14zXP7s8b-zX3ZcxcyWePw@mail.gmail.com/
Tested-by: Yijun Shen <Yijun.Shen@Dell.com>
Signed-off-by: Mario Limonciello (AMD) <superm1@kernel.org>
Reviewed-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://patch.msgid.link/20260116041132.153674-4-superm1@kernel.org
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Mario Limonciello (AMD) 2026-01-15 22:11:30 -06:00 • committed by Sasha Levin
commit 809fd697da
6 changed files with 47 additions and 1 deletions
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