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Date:   Wed, 13 Apr 2022 08:58:35 -0700
Message-Id: <20220413155835.439785-1-pgonda@google.com>
Mime-Version: 1.0
Subject: [PATCH] crypto: ccp - Log when resetting PSP SEV state
From:   Peter Gonda <pgonda@google.com>
To:     linux-crypto@vger.kernel.org
Cc:     Peter Gonda <pgonda@google.com>,
        Tom Lendacky <thomas.lendacky@amd.com>,
        Brijesh Singh <brijesh.singh@amd.com>,
        David Rientjes <rientjes@google.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        John Allen <john.allen@amd.com>, linux-kernel@vger.kernel.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

Currently when the PSP returns a SECURE_DATA_INVALID error on INIT or
INIT_EX the driver retries the command once which should reset the PSP's
state SEV related state, meaning the PSP will regenerate its keying
material. This is logged with a dbg log but given this will change
system state this should be logged at a higher priority and with more
information.

Signed-off-by: Peter Gonda <pgonda@google.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Brijesh Singh <brijesh.singh@amd.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: John Allen <john.allen@amd.com>
Cc: linux-crypto@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
---
 drivers/crypto/ccp/sev-dev.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c
index 6ab93dfd478a..fd928199bf1e 100644
--- a/drivers/crypto/ccp/sev-dev.c
+++ b/drivers/crypto/ccp/sev-dev.c
@@ -435,7 +435,7 @@ static int __sev_platform_init_locked(int *error)
 		 * initialization function should succeed by replacing the state
 		 * with a reset state.
 		 */
-		dev_dbg(sev->dev, "SEV: retrying INIT command");
+		dev_err(sev->dev, "SEV: retrying INIT command because of SECURE_DATA_INVALID error. Retrying once to reset PSP SEV state.");
 		rc = init_function(&psp_ret);
 	}
 	if (error)
-- 
2.35.1.1178.g4f1659d476-goog