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Tue, 3 Nov 2026 22:45:16 +0000 (GMT) Received: from [9.61.96.67] (unknown [9.61.96.67]) by smtpav03.wdc07v.mail.ibm.com (Postfix) with ESMTP; Tue, 3 Nov 2026 22:45:16 +0000 (GMT) Message-ID: Date: Tue, 3 Nov 2026 17:45:15 -0500 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v12 5/5] vfio-pci/zdev: Add VFIO FMB device features To: Niklas Schnelle , Omar Elghoul , linux-s390@vger.kernel.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: hca@linux.ibm.com, gor@linux.ibm.com, agordeev@linux.ibm.com, borntraeger@linux.ibm.com, svens@linux.ibm.com, alifm@linux.ibm.com, farman@linux.ibm.com, gbayer@linux.ibm.com, pasic@linux.ibm.com, alex@shazbot.org, frankja@linux.ibm.com, imbrenda@linux.ibm.com References: <20261103150114.68873-1-oelghoul@linux.ibm.com> <20261103150114.68873-6-oelghoul@linux.ibm.com> <15fbeb951c380ba6a200651d6ff69b783c96a375.camel@linux.ibm.com> Content-Language: en-US From: Matthew Rosato In-Reply-To: <15fbeb951c380ba6a200651d6ff69b783c96a375.camel@linux.ibm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-TM-AS-GCONF: 00 X-Proofpoint-GUID: eQOide1Nl49tr_hewoghzcQktMMQdVdC X-Proofpoint-ORIG-GUID: eQOide1Nl49tr_hewoghzcQktMMQdVdC X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMTAzMDA5MCBTYWx0ZWRfXxIIcUsO4Xe64 WpHb9oAyqT0tf7Q6FoZoQyu4h/Bb520VTlbU92RM8pCj1qA5Zgqy8wlWRc80tfZ+XFWBwjoc4jD zVEY22wqpijjlBdrqukYAl7eMpxo28FX4BpPRunTb8/AKUyciaNNewGy7iBNkrnBXGqMQhbFr7E Btt/vUmrU/CjcyPEwCR8XmwDdoaXqXCOMUUsi+HOBmP7tVM11Gg4oJzUXhoxhtIehXzabLlQ/uJ JNu/0SPuR+1R1fcWI8vWspJgd4oU9uu9R9rBvf/4jSycJVWwbrNgb4CQ2IpSYrOwaUbaWStvHzY JGJH/sUCLJd9jejv4nGRpotfWFHVkAfAWiL83Tg8IaY1SDOOSydF6wrroBlq/j92aSLlcIeORer EKknDLg9MH5L55jemp5goRH5bHdFdcG6O2GmiDDsr0+YUTf622cgPFXef61g0cXzRcljbCJcgyY ESYAqpEfnywdiZJOBcA== X-Proofpoint-Spam-Info: AW1haW4tMjYxMTAzMDA5MCBTYWx0ZWRfX7TuInsBj410L lnVrZ6IT5Go31JGZ7A3cIHe4U02TnaFJDx/fhcWTTe/CFPVxptRNuBfBPOJM4elmefwQBN3AwDe WVEiEf8gCd7RjfXbA68W8GI/HktQOo4= X-Authority-Analysis: v=2.4 cv=FIqOVOos c=1 sm=1 tr=0 ts=6aea6400 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=zJRp6_cAMcgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=r1p2_3pzAAAA:8 a=F7dn7BFMEDAEK2aV7o8A:9 a=QEXdDO2ut3YA:10 a=r_pkcD-q9-ctt7trBg_g:22 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.138,FMLib:17.12.100.49 definitions=2026-11-03_05,2026-11-03_04,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 malwarescore=0 impostorscore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610300000 definitions=main-2611030090 On 11/3/26 4:08 PM, Niklas Schnelle wrote: > On Tue, 2026-11-03 at 10:01 -0500, Omar Elghoul wrote: >> Introduce new VFIO features for zPCI devices to provide FMB passthrough to >> userspace. >> >> Allow the user to enable or disable the FMB using the SET-only feature >> VFIO_DEVICE_FEATURE_ZPCI_FMB_ENABLE. Likewise allow the user to read the >> latest FMB using the GET-only feature VFIO_DEVICE_FEATURE_ZPCI_FMB_READ >> in the case when the FMB is enabled. >> >> Signed-off-by: Omar Elghoul >> Acked-by: Alex Williamson Reviewed-by: Matthew Rosato