linux-kernel - [PATCH v6 21/26] powerpc/pseries: Clarify warning when PLPKS password already set

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Date:   Fri, 10 Feb 2023 19:03:56 +1100
From:   Andrew Donnellan <ajd@...ux.ibm.com>
To:     linuxppc-dev@...ts.ozlabs.org, linux-integrity@...r.kernel.org
Cc:     ruscur@...sell.cc, bgray@...ux.ibm.com, nayna@...ux.ibm.com,
        gcwilson@...ux.ibm.com, gjoyce@...ux.ibm.com, brking@...ux.ibm.com,
        stefanb@...ux.ibm.com, sudhakar@...ux.ibm.com,
        erichte@...ux.ibm.com, gregkh@...uxfoundation.org,
        linux-kernel@...r.kernel.org, zohar@...ux.ibm.com, joel@....id.au,
        npiggin@...il.com
Subject: [PATCH v6 21/26] powerpc/pseries: Clarify warning when PLPKS password already set

When the H_PKS_GEN_PASSWORD hcall returns H_IN_USE, operations that require
authentication (i.e. anything other than reading a world-readable variable)
will not work.

The current error message doesn't explain this clearly enough. Reword it
to emphasise that authenticated operations will fail.

Signed-off-by: Andrew Donnellan <ajd@...ux.ibm.com>

---

v6: New patch
---
 arch/powerpc/platforms/pseries/plpks.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/platforms/pseries/plpks.c b/arch/powerpc/platforms/pseries/plpks.c
index 926b6a927326..01ae919b4497 100644
--- a/arch/powerpc/platforms/pseries/plpks.c
+++ b/arch/powerpc/platforms/pseries/plpks.c
@@ -146,7 +146,7 @@ static int plpks_gen_password(void)
 		memcpy(ospassword, password, ospasswordlength);
 	} else {
 		if (rc == H_IN_USE) {
-			pr_warn("Password is already set for POWER LPAR Platform KeyStore\n");
+			pr_warn("Password already set - authenticated operations will fail\n");
 			rc = 0;
 		} else {
 			goto out;
-- 
2.39.1