From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42014) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dpDcI-0004x2-3g for qemu-devel@nongnu.org; Tue, 05 Sep 2017 09:10:14 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dpDc8-00068x-P6 for qemu-devel@nongnu.org; Tue, 05 Sep 2017 09:10:10 -0400 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:55722) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dpDc8-000680-FG for qemu-devel@nongnu.org; Tue, 05 Sep 2017 09:10:00 -0400 Received: from pps.filterd (m0098396.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.21/8.16.0.21) with SMTP id v85D90Z2096666 for ; Tue, 5 Sep 2017 09:09:59 -0400 Received: from e06smtp11.uk.ibm.com (e06smtp11.uk.ibm.com [195.75.94.107]) by mx0a-001b2d01.pphosted.com with ESMTP id 2csv9nh15s-1 (version=TLSv1.2 cipher=AES256-SHA bits=256 verify=NOT) for ; Tue, 05 Sep 2017 09:09:58 -0400 Received: from localhost by e06smtp11.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 5 Sep 2017 14:09:55 +0100 References: <20170904154316.4148-1-david@redhat.com> <20170904154316.4148-18-david@redhat.com> <41bbb466-4b9d-1c7e-f622-38a867b1db65@de.ibm.com> <20170905145417.05fa0fae.cohuck@redhat.com> From: Christian Borntraeger Date: Tue, 5 Sep 2017 15:09:51 +0200 MIME-Version: 1.0 In-Reply-To: <20170905145417.05fa0fae.cohuck@redhat.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Message-Id: Subject: Re: [Qemu-devel] [PATCH v2 17/19] s390x: CPU hot unplug via device_del cannot work List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Cornelia Huck Cc: David Hildenbrand , qemu-devel@nongnu.org, Richard Henderson , thuth@redhat.com, Alexander Graf , Eduardo Habkost On 09/05/2017 02:54 PM, Cornelia Huck wrote: [...] > Having the cpu in the unconfigured state as a requirement also makes > this less likely to break for older OSs, I guess. > >> Right now SCLP_CMDW_(DE)CONFIGURE_CPU seems to be unimplemented in >> QEMU. > > Sounds like something we'd like to have in the future? > > (Btw, what does cpuplugd trigger? Offline/online or > deconfigure/configure?) offline/online via sigp stop/start. When we hotplug we already provide the new cpu in the configured state (like z/VM).