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Fri, 14 Aug 2026 14:20:11 +0000 (GMT) Received: from ibm.com (unknown [9.111.74.75]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 14 Aug 2026 14:20:11 +0000 (GMT) From: Holger Dengler To: Harald Freudenberger , Herbert Xu Cc: dengler@linux.ibm.com, linux-s390@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Eric Biggers , linux-crypto@vger.kernel.org, ifranzki@linux.ibm.com Subject: [PATCH v1 1/1] s390/crypto: Generate intermediate CV for API partial block handling Date: Fri, 14 Aug 2026 16:20:10 +0200 Message-ID: <20260814142010.259918-2-dengler@linux.ibm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260814142010.259918-1-dengler@linux.ibm.com> References: <20260814142010.259918-1-dengler@linux.ibm.com> Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=RsP16imK c=1 sm=1 tr=0 ts=6a7f2420 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=RzCfie-kr_QcCd8fBx8p:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8 a=EzrveUIq3cTPK2vlegIA:9 X-Proofpoint-GUID: PBfmAq86EmmKmOmYO82l4occ9fWQYBvs X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE0MDEwNyBTYWx0ZWRfX83GlV5+YvjPT kij7Yh/f11dI7kmUQ/eBwyPxw4e4Cp3KFXJFCxOr4PiJfSutpwjRRHhC1sV8mW0wA9xJlRBcHQW yOb16cXaOFRF3ULeCMt9eL9hAaLmohZV0qnjEg4+jbb8serK6hKgt6uhkUidz3QNsD6qFxxDZCq APLIX9tzGtjs8TOUBIGKFrFCX3BVYlSjNNBLLoKw+cQXrGp+e2/icPcorLkIIVp7KfqrkT2+vI7 3E/XciRpaRZgZkJ7BkS7cWRmkb2+CWOOyahaGoXuS8F7Zdwy3hnVbeMwU6LhyoQsEXnl9YH0EpU cfJ0Yrzl3XVCCB+pbnOUzV9EmdU4tIveC+lzE7G1LQ5TltujSQlIHT5BFQir96kRPdPojlvV1rs cYsxEd7cqMmSZR5vkFg4K6n0zPENNaYtqy2EJiNXh3o1Ay94LTcgO/eq58D9adXjLLAp2q1yfi9 +h01C6/g20sOpsIMzIw== X-Proofpoint-ORIG-GUID: PBfmAq86EmmKmOmYO82l4occ9fWQYBvs X-Proofpoint-Spam-Info: AW1haW4tMjYwODE0MDEwNyBTYWx0ZWRfX/bYHJVW4LBnD lNelSE3tmHpadoeslZIcEDSY3HpgG5PRId92yL+q30+0/Xe/iJFCLt3T4qA6fCVLBiOV4PN3D+0 5XXIjoLsR7YXELT+iTybtQXyDWkAWpI= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-08-14_05,2026-08-12_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 suspectscore=0 clxscore=1015 malwarescore=0 phishscore=0 adultscore=0 lowpriorityscore=0 priorityscore=1501 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608140107 The API partial block handling requires a intermediate chaining value (CV). The internal function hash_data() sets the function code correctly, so also call cpacf_kimd() instruction for intermediate CV generation, as cpacf_klmd() always generate the final hash value. Cc: stable@vger.kernel.org # 6.15+ Fixes: 08811169ac01 ("crypto: s390/hmac - Use API partial block handling") Signed-off-by: Holger Dengler --- arch/s390/crypto/hmac_s390.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/arch/s390/crypto/hmac_s390.c b/arch/s390/crypto/hmac_s390.c index f8cd09f341d4..445fa7bbd958 100644 --- a/arch/s390/crypto/hmac_s390.c +++ b/arch/s390/crypto/hmac_s390.c @@ -150,7 +150,10 @@ static int hash_data(const u8 *in, unsigned int inlen, #undef PARAM_INIT - cpacf_klmd(func, ¶m, in, inlen); + if (final) + cpacf_klmd(func, ¶m, in, inlen); + else + cpacf_kimd(func, ¶m, in, inlen); memcpy(digest, ¶m, digestsize); -- 2.55.0