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Mon, 14 Apr 2025 10:14:55 +0000 (GMT) Message-ID: Date: Mon, 14 Apr 2025 12:14:55 +0200 Precedence: bulk X-Mailing-List: linux-s390@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 1/3] s390/cpacf: Rework cpacf_pcc() to return condition code To: Harald Freudenberger , herbert@gondor.apana.org.au, ifranzki@linux.ibm.com, fcallies@linux.ibm.com Cc: linux-crypto@vger.kernel.org, linux-s390@vger.kernel.org References: <20250401145048.52564-1-freude@linux.ibm.com> <20250401145048.52564-2-freude@linux.ibm.com> Content-Language: en-US From: Holger Dengler In-Reply-To: <20250401145048.52564-2-freude@linux.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: VTFFitV_minUbHGX1H65pL0PZxcEqubz X-Proofpoint-ORIG-GUID: VTFFitV_minUbHGX1H65pL0PZxcEqubz X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1095,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-04-14_03,2025-04-10_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 phishscore=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 malwarescore=0 spamscore=0 impostorscore=0 priorityscore=1501 mlxlogscore=563 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502280000 definitions=main-2504140072 On 01/04/2025 16:50, Harald Freudenberger wrote: > Some of the pcc sub-functions have a protected key as > input and thus may run into the situation that this > key may be invalid for example due to live guest migration > to another physical hardware. > > Rework the inline assembler function cpacf_pcc() to > return the condition code (cc) as return value: > 0 - cc code 0 (normal completion) > 1 - cc code 1 (prot key wkvp mismatch or src op out of range) > 2 - cc code 2 (something invalid, scalar multiply infinity, ...) > Note that cc 3 (partial completion) is handled within the asm code > and never returned. > > Signed-off-by: Harald Freudenberger Reviewed-by: Holger Dengler -- Mit freundlichen Grüßen / Kind regards Holger Dengler -- IBM Systems, Linux on IBM Z Development dengler@linux.ibm.com