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a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc\n :content-transfer-encoding:date:from:message-id:mime-version\n :subject:to; s=pp1; bh=ggx50fiGqUmzJjEb461wAkP8w3ZYmH8lu7WYf9RqO\n 0E=; b=lpo4OnVEt6eZImSxfVj7k9RcFrFLODGEjG0bJMumZiVQ5NdsTKCQ119Cu\n /aEWK63Idi0niZHIQRQXP7JdtPUykiQAC0kKGOSWNUqRfo23CgVUXPgMY4Tgbiy/\n 6lFR7Iikv4L805r3vpqvh3VYYMik5mpq8G+fviFKjgPS3QhMUPc40YoQzuvU7c4G\n MFseIYM04EakEm3vecDq95U4zAyBnqyxHhIMF6NcGnww8eeT8omtlPCLdniUx9Ca\n GbJXWr1Mi7DYHsUBA6mWToxZbvOE/adV4HQp8VEACCGK3YHHBRKU7xZQUSJqSpbd\n vIIoAfFj+ZdNhkVWSPolVygSrWKCg==","From":"Jaehoon Kim ","To":"qemu-devel@nongnu.org, qemu-s390x@nongnu.org","Cc":"richard.henderson@linaro.org, iii@linux.ibm.com, david@kernel.org,\n pasic@linux.ibm.com, borntraeger@linux.ibm.com, farman@linux.ibm.com,\n mjrosato@linux.ibm.com, cohuck@redhat.com,\n Jaehoon Kim ","Subject":"[PATCH v2 0/1] hw/s390x/ccw: Disable legacy mode","Date":"Mon, 20 Apr 2026 09:47:33 -0500","Message-ID":"<20260420144759.2970726-1-jhkim@linux.ibm.com>","X-Mailer":"git-send-email 2.43.0","MIME-Version":"1.0","Content-Transfer-Encoding":"8bit","X-TM-AS-GCONF":"00","X-Proofpoint-ORIG-GUID":"gcNQnf-4cNApVLlKItks8yaBVd_zOqtk","X-Proofpoint-Spam-Details-Enc":"AW1haW4tMjYwNDIwMDE0NCBTYWx0ZWRfX5yUWSwzda8ZG\n t6o0yJnxqEtqFf40B6Z8ZBtuf5dKM7k2ucFzPsR6Inaq+O2EvkdVRdNw5zueQs75jL0Mw8/m3Cz\n j/sql+XuDPp9iiAyaFVCxwyKF/o5WO/qhli1umuI7hEgODQ1pSUVVN4YMl2jD17UtrhTDbF0goh\n CeV3j4PAgd9Ubah0d6ZZ6jLoGLrKLRvjT3xaHhUde+r01KJ3LvUQqmE53XPkPopNCFxpYFmewR5\n IH5zQsJBXwO6w3vvGZ3joXHifWHbX0xArEPCQO/0Toj9cn/OrqjiI47HB/wBh8iVCMUm9OLWeny\n pKLWgdbd3bn6YCDZCdwRGNf4t0JW7KkpoDkzs2cMrnqtRlLkXy108CiCWM47b3v1nbH9T3ISo9R\n Npddof22cqIOR0yMHiXr7fMRtpT7OCBS7IGpNYot7wiv0hSzJihSk/MnT+fUzP+SBgwb60kCajp\n xzmsX0oi1iuiuKpC3YA==","X-Proofpoint-GUID":"gcNQnf-4cNApVLlKItks8yaBVd_zOqtk","X-Authority-Analysis":"v=2.4 cv=B7iJFutM c=1 sm=1 tr=0 ts=69e63ca4 cx=c_pps\n a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17\n a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=iQ6ETzBq9ecOQQE5vZCe:22 a=VwQbUJbxAAAA:8 a=VnNF1IyMAAAA:8\n a=Tlqw0IQ_KjvEc9IBcG4A:9","X-Proofpoint-Virus-Version":"vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-20_03,2026-04-17_04,2025-10-01_01","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n malwarescore=0 priorityscore=1501 spamscore=0 impostorscore=0 adultscore=0\n bulkscore=0 phishscore=0 suspectscore=0 lowpriorityscore=0 clxscore=1015\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2604070000 definitions=main-2604200144","Received-SPF":"pass client-ip=148.163.156.1; envelope-from=jhkim@linux.ibm.com;\n helo=mx0a-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,\n DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7,\n RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001,\n 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":",\n ","List-Archive":"","List-Post":"","List-Help":"","List-Subscribe":",\n ","Errors-To":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org","Sender":"qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org"},"content":"Hello,\n\nThis is v2 of the patch.\n\nChanges in v2:\n- Drop RFC tag as the approach has been reviewed and agreed in principle.\n- Improve comments to clarify why legacy virtio-pci is not usable on s390x\n due to lack of I/O BAR support (IO_SPACE_LIMIT is 0).\n\nNo functional changes.\n\nRFC v1:\nhttps://lore.kernel.org/qemu-devel/20260417154332.849664-1-jhkim@linux.ibm.com/\n\nThanks,\nJaehoon Kim.\n\nJaehoon Kim (1):\n hw/s390x/ccw: Disable legacy virtio-pci by default (v11.1+)\n\n hw/s390x/s390-virtio-ccw.c | 26 ++++++++++++++++++++++++++\n 1 file changed, 26 insertions(+)"}