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List:       linux-keyrings
Subject:    [PATCH] tpm: Disable TCG_TPM2_HMAC by default
From:       Jarkko Sakkinen <jarkko () kernel ! org>
Date:       2024-05-18 11:34:24
Message-ID: 20240518113424.13486-1-jarkko () kernel ! org
[Download RAW message or body]

Causes performance drop in initialization so needs to be opt-in.
Distributors are capable of opt-in enabling this. Could be also handled by
kernel-command line in the future.

Reported-by: Vitor Soares <ivitro@gmail.com>
Closes: https://lore.kernel.org/linux-integrity/bf67346ef623ff3c452c4f968b7d900911e250c3.camel@gmail.com/#t
                
Fixes: d2add27cf2b8 ("tpm: Add NULL primary creation")
Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
---
 drivers/char/tpm/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/char/tpm/Kconfig b/drivers/char/tpm/Kconfig
index e63a6a17793c..db41301e63f2 100644
--- a/drivers/char/tpm/Kconfig
+++ b/drivers/char/tpm/Kconfig
@@ -29,7 +29,7 @@ if TCG_TPM
 
 config TCG_TPM2_HMAC
 	bool "Use HMAC and encrypted transactions on the TPM bus"
-	default y
+	default n
 	select CRYPTO_ECDH
 	select CRYPTO_LIB_AESCFB
 	select CRYPTO_LIB_SHA256
-- 
2.45.0


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