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Mon, 3 Aug 2026 12:40:46 +0000 (GMT) From: Claudio Imbrenda To: linux-kernel@vger.kernel.org Cc: kvm@vger.kernel.org, linux-s390@vger.kernel.org, borntraeger@de.ibm.com, frankja@linux.ibm.com, david@kernel.org, seiden@linux.ibm.com, nrb@linux.ibm.com, schlameuss@linux.ibm.com, gra@linux.ibm.com Subject: [PATCH v8 11/13] KVM: s390: Return -EINTR if a signal is pending while faulting-in Date: Mon, 3 Aug 2026 14:40:38 +0200 Message-ID: <20260803124040.126471-12-imbrenda@linux.ibm.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260803124040.126471-1-imbrenda@linux.ibm.com> References: <20260803124040.126471-1-imbrenda@linux.ibm.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-TM-AS-GCONF: 00 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODAzMDExMCBTYWx0ZWRfX0fcjnLDbspwQ edKuIQi+/zzPFUrks/VxkUTM0S1p0bk6GxQSzkSO3nl968Zn3KP2rkZU08BMVchfWMd8Xxhb89D PxH1OJ+phwlCzQmYD4GojOeoxfDRZDGut0JIu945Ry83+pHoE1MRUSmy2BvMabnLYpMva1P4yKf BIJYkMzRN09l9NgZNHyrK4uKRTiOHjULJLGxWk+nvmN7OVEdb/YRZgo4ewGLQfHw6HB72Vo8Kn1 FCVJyTRu7BuxbLPoIMmUpsYidh+fZwaUr6YNcn+BH5HN2sEYGN9fyVvKcbUriFiQHQuDZ2lxWG+ EL+I5oa/nF2a8m5E4Zg+199vcP/SMj7D+AYWvjAqNBVA3vDTVcQiHL0fvQR1ve2zxsaG5p2TJs4 iP788ZiXdzhx7qlfjoR3ND5ECf0hlGrZ5QBQqy3VmOyFlMaycSBG65szh7SiVskd+UXaDbF6lQJ K1LF6lUWk7nGmco6MgQ== X-Authority-Analysis: v=2.4 cv=WIFPmHsR c=1 sm=1 tr=0 ts=6a708c55 cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=Sv0fKeRqtYgA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=4yawSYOjwzvXb9KGJXwA:9 X-Proofpoint-GUID: QthsY7RTdJQ33zaa-zrLeFbpH9hI15Ff X-Proofpoint-ORIG-GUID: QthsY7RTdJQ33zaa-zrLeFbpH9hI15Ff X-Proofpoint-Spam-Info: AW1haW4tMjYwODAzMDExMCBTYWx0ZWRfX+H6bkR0xKM6D 2BhaJD7OoTOc91cpzGgabCYIsXZHzVPgz/6R1wxxdUsn3uPLLZmWFErznulM0ECweeiX9cGdrEF kAEQzTGPuAuwOrqF3D9a0wl27IDjiNU= 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=2026-08-03_03,2026-07-30_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 priorityscore=1501 phishscore=0 malwarescore=0 suspectscore=0 clxscore=1015 impostorscore=0 bulkscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608030110 If a fatal signal is pending while trying to fault-in a page, return -EINTR instead of -EAGAIN. Also fix unpack_one() to handle -EINTR properly. Signed-off-by: Claudio Imbrenda Fixes: e907ae530133 ("KVM: s390: Add helper functions for fault handling") --- arch/s390/kvm/faultin.c | 6 +++--- arch/s390/kvm/pv.c | 2 +- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/arch/s390/kvm/faultin.c b/arch/s390/kvm/faultin.c index fee80047bd94..3cc45f7f5b2d 100644 --- a/arch/s390/kvm/faultin.c +++ b/arch/s390/kvm/faultin.c @@ -91,9 +91,9 @@ int kvm_s390_faultin_gfn(struct kvm_vcpu *vcpu, struct kvm *kvm, struct guest_fa /* Access outside memory, addressing exception. */ if (is_noslot_pfn(f->pfn)) return PGM_ADDRESSING; - /* Signal pending: try again. */ - if (f->pfn == KVM_PFN_ERR_SIGPENDING) - return -EAGAIN; + /* Fatal signal pending: bail out. */ + if (is_sigpending_pfn(f->pfn)) + return -EINTR; /* Check if it's read-only memory; don't try to actually handle that case. */ if (f->pfn == KVM_PFN_ERR_RO_FAULT) return -EOPNOTSUPP; diff --git a/arch/s390/kvm/pv.c b/arch/s390/kvm/pv.c index 1beacc841ca8..dc204b521052 100644 --- a/arch/s390/kvm/pv.c +++ b/arch/s390/kvm/pv.c @@ -809,7 +809,7 @@ static int unpack_one(struct kvm *kvm, unsigned long addr, u64 tweak, return -EAGAIN; } - if (ret && ret != -EAGAIN) + if (ret && ret != -EAGAIN && ret != -EINTR) KVM_UV_EVENT(kvm, 3, "PROTVIRT VM UNPACK: failed addr %llx with rc %x rrc %x", uvcb.gaddr, *rc, *rrc); return ret; -- 2.55.0