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Thu, 24 Sep 2026 17:19:12 +0200 Date: Thu, 24 Sep 2026 17:19:12 +0200 From: Hendrik Brueckner To: Janosch Frank Cc: qemu-devel@nongnu.org, qemu-s390x@nongnu.org, brueckner@linux.ibm.com, borntraeger@de.ibm.com, cohuck@redhat.com, farman@linux.ibm.com, david@kernel.org, iii@linux.ibm.com, richard.henderson@linaro.org Subject: Re: [PATCH v3] s390x: Expose pv attribute in QOM Message-ID: References: <20260924142846.157848-1-frankja@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260924142846.157848-1-frankja@linux.ibm.com> X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=G+OJgNk5 c=1 sm=1 tr=0 ts=6ab53f78 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=kj9zAlcOel0A:10 a=VdqzKS8jKosA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=nZy19kRignTvS_rYd3gA:9 a=CjuIK1q_8ugA:10 a=ZXulRonScM0A:10 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI0MDA2MiBTYWx0ZWRfX5jeHPedN3gNJ MZ5Mc3YQQVAnYWxSAMyHnICHUO9luMqCHOloYfcmp1AHKgv0UKvp1NVRo/KTALsm6x17RLjPZ9q idCqn7sbe78IA2/VrNTulDX4qWiKZDJ/Y0ievbmZglqoF411/l20uZ8O40V2k16YGa5Il+OkKcn /Fjdu54AwBN74DaxblskVU6cOb0ZNZ6pdd4JqM0boVtLws19R2r2SRxKnNaPhcgiVSq2VRJEwsz guGCXI+60mEgGhKJ5+dsMY2VZNz4YU7ebWY6kxTwpBmwWXobk/HIHjNZgSmxyQsu2Ua7X2OyVrY N3xj51+ERjL1COEHnANDsCiN1/xOi1SviJ4A3cKAYSYdOv89RIjVfB58x7bPF9SFt5MSMDkOH5Q BrK7z7XA10r+uT7juXXf5HsYx2ARZRHSMcs76a6rB4uIu7RA+FIqowGRiW0U0aJoiKFiBGkT/AX Xh93v1jTmtMxCUjEPrw== X-Proofpoint-ORIG-GUID: uRENKsB6ooG6aa8330P99btSWM30rOMn X-Proofpoint-GUID: uRENKsB6ooG6aa8330P99btSWM30rOMn X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI0MDA2MiBTYWx0ZWRfX+5miCca18aXb UkthgwjbzZQ70fkSHmpFMhsZFmX/nkitF5Nb0l28d13LrhnaMaeJ1Bawhi7VzCXEXzbARUlc5Q5 xGVbi1jSaLLJ1uMgX+oQeVv5WvOy+tQ= 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=2026-09-24_03,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 impostorscore=0 bulkscore=0 priorityscore=1501 clxscore=1011 spamscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609240062 Received-SPF: pass client-ip=148.163.158.5; envelope-from=brueckner@linux.ibm.com; helo=mx0b-001b2d01.pphosted.com X-Spam_score_int: -26 X-Spam_score: -2.7 X-Spam_bar: -- X-Spam_report: (-2.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On Thu, Sep 24, 2026 at 02:27:22PM +0000, Janosch Frank wrote: > People doing VM management requested a way to query if a VM is in PV > or not. So this patch exposes the runtime PV attribute which is true > once the VM successfully made the switch into PV mode (according to > KVM) and did not yet reboot to drop out of it. > > This of course does never replace attestation, it's merely QEMU's view > of the situation. > > Signed-off-by: Janosch Frank > CC: Hendrik Brueckner > Reviewed-by: Christian Borntraeger > Reviewed-by: Eric Farman > Reviewed-by: Matthew Rosato > --- Reviewed-by: Hendrik Brueckner