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Tue, 7 Apr 2026 12:28:02 +0000 (GMT) Message-ID: <61126291e21010eb79bc0a8d02cbf5d30e0c7b8f.camel@linux.ibm.com> Subject: Re: [PATCH v7 1/2] docs: s390/pci: Improve and update PCI documentation From: Gerd Bayer To: Niklas Schnelle , Bjorn Helgaas , Jonathan Corbet , Lukas Wunner , Shuah Khan Cc: Farhan Ali , Alexander Gordeev , Christian Borntraeger , Gerald Schaefer , Heiko Carstens , Julian Ruess , Matthew Rosato , Peter Oberparleiter , Ramesh Errabolu , Sven Schnelle , Vasily Gorbik , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, linux-s390@vger.kernel.org, Randy Dunlap , Gerd Bayer Date: Tue, 07 Apr 2026 14:28:02 +0200 In-Reply-To: <20260407-uid_slot-v7-1-e50f7976124e@linux.ibm.com> References: <20260407-uid_slot-v7-0-e50f7976124e@linux.ibm.com> <20260407-uid_slot-v7-1-e50f7976124e@linux.ibm.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.3 (3.58.3-1.fc43) Precedence: bulk X-Mailing-List: linux-doc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-ORIG-GUID: 2FrKXpPRsQulnMDZ7cCBZYX1SSb9CaJg X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNDA3MDExNSBTYWx0ZWRfX6U7wudWaC2vP aeCb1yFxSgTz20lMErS145WDtAbPJ1p4DbtUSEgt49uruJWHkQFUfSOOAV66J7iI+vkmGEg0L2G v9A1Ndu+L+lt6yynCLh5UdOZZPyrUWLrpDxEc9oqKwVYztHcRKiez4f+FOIqGUxBWg7l8o372EK eavRf2lwDrCoZ059SbYBkHlG7RGwMMAP3XWKjGMpfZ2BiZbBihwAZckYeKtUJsu44pUdK9LDZ89 tioW9HeaFRReLd5hFa7F7gZntr4qCRpsnbPHuSZA5lUCMt8eGA6JtudBP/y5zCkDivo1d9kDD10 QA23i/oNeCV2y9R+Sut4lgv/krDtgDeTtk8B4xyP03Gq5HTA9fWZpTgICPZ3lbe4MEef98VN1Xw ZYRM3LZLOHnmw4fLkXbURqCskuFWf6owB7fDxBmJPIH8hEzxVWL2vr6eM73396q1ulSQkeNXjAE vlj4+WHFEDgzsyI3Ksg== X-Authority-Analysis: v=2.4 cv=Cfw4Irrl c=1 sm=1 tr=0 ts=69d4f858 cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=OSxpM7LHIlj9ssaGjo0A:9 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: -KEi8FMBa-OPQkuO470t9wEU_YANZg5t X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-04-07_02,2026-04-07_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 phishscore=0 clxscore=1011 adultscore=0 suspectscore=0 priorityscore=1501 impostorscore=0 bulkscore=0 spamscore=0 lowpriorityscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604010000 definitions=main-2604070115 On Tue, 2026-04-07 at 12:12 +0200, Niklas Schnelle wrote: [... snip ...] > Similarly add documentation for the fidparm attribute added by commit > 99ad39306a62 ("s390/pci: Expose FIDPARM attribute in sysfs") and > add a list of pft values and their names. >=20 [... snip ...] > --- > Documentation/arch/s390/pci.rst | 144 +++++++++++++++++++++++++++-------= ------ > 1 file changed, 97 insertions(+), 47 deletions(-) >=20 > diff --git a/Documentation/arch/s390/pci.rst b/Documentation/arch/s390/pc= i.rst > index d5755484d8e75c7bf67a350e61bbe04f0452a2fa..8cb0a1e784a7cfc5df1e04a41= 54ba02c9ecf46cc 100644 > --- a/Documentation/arch/s390/pci.rst > +++ b/Documentation/arch/s390/pci.rst > @@ -6,6 +6,7 @@ S/390 PCI > =20 > Authors: > - Pierre Morel > + - Niklas Schnelle > =20 > Copyright, IBM Corp. 2020 > =20 > @@ -27,14 +28,16 @@ Command line parameters > debugfs entries > --------------- > =20 > -The S/390 debug feature (s390dbf) generates views to hold various debug = results in sysfs directories of the form: > +The S/390 debug feature (s390dbf) generates views to hold various debug = results > +in sysfs directories of the form: > =20 > * /sys/kernel/debug/s390dbf/pci_*/ > =20 > For example: > =20 > - /sys/kernel/debug/s390dbf/pci_msg/sprintf > - Holds messages from the processing of PCI events, like machine check= handling > + > + holds messages from the processing of PCI events, like machine check= handling > and setting of global functionality, like UID checking. > =20 > Change the level of logging to be more or less verbose by piping > @@ -47,87 +50,134 @@ Sysfs entries > =20 [... snip ...] > + > +* /sys/firmware/clp/uid_is_unique: As much as I had loved the attribute to be named as such, or even better /sys/firmware/clp/uids_are_unique, I find commit b043a81ce3ee ("s390/pci: Expose firmware provided UID Checking state in sysfs") has introduced /sys/firmware/clp/uid_checking. Sorry, that this did slip me... Gerd