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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Sat, 21 Mar 2020 00:47:57 -0000 Received: from d06av25.portsmouth.uk.ibm.com (d06av25.portsmouth.uk.ibm.com [9.149.105.61]) by b06avi18878370.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 02L0ltuj39911824 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 21 Mar 2020 00:47:55 GMT Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C38FB11C04C; Sat, 21 Mar 2020 00:47:55 +0000 (GMT) Received: from d06av25.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 7AC0F11C04A; Sat, 21 Mar 2020 00:47:54 +0000 (GMT) Received: from oc0525413822.ibm.com (unknown [9.85.223.94]) by d06av25.portsmouth.uk.ibm.com (Postfix) with ESMTPS; Sat, 21 Mar 2020 00:47:54 +0000 (GMT) Date: Fri, 20 Mar 2020 17:47:51 -0700 From: Ram Pai To: Laurent Dufour References: <20200320102643.15516-1-ldufour@linux.ibm.com> <20200320102643.15516-3-ldufour@linux.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200320102643.15516-3-ldufour@linux.ibm.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-TM-AS-GCONF: 00 x-cbid: 20032100-4275-0000-0000-000003B005B6 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20032100-4276-0000-0000-000038C53882 Message-Id: <20200321004751.GB5243@oc0525413822.ibm.com> Subject: Re: [PATCH 2/2] KVM: PPC: Book3S HV: H_SVM_INIT_START must call UV_RETURN X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.645 definitions=2020-03-20_08:2020-03-20, 2020-03-20 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 malwarescore=0 impostorscore=0 mlxscore=0 phishscore=0 priorityscore=1501 adultscore=0 clxscore=1015 bulkscore=0 mlxlogscore=864 suspectscore=2 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2003200094 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Ram Pai Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, kvm-ppc@vger.kernel.org, Bharata B Rao Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" On Fri, Mar 20, 2020 at 11:26:43AM +0100, Laurent Dufour wrote: > When the call to UV_REGISTER_MEM_SLOT is failing, for instance because > there is not enough free secured memory, the Hypervisor (HV) has to call secure memory, > UV_RETURN to report the error to the Ultravisor (UV). Then the UV will call > H_SVM_INIT_ABORT to abort the securing phase and go back to the calling VM. > > If the kvm->arch.secure_guest is not set, in the return path rfid is called > but there is no valid context to get back to the SVM since the Hcall has > been routed by the Ultravisor. > > Move the setting of kvm->arch.secure_guest earlier in > kvmppc_h_svm_init_start() so in the return path, UV_RETURN will be called > instead of rfid. > > Cc: Bharata B Rao > Cc: Paul Mackerras > Cc: Benjamin Herrenschmidt > Cc: Michael Ellerman > Signed-off-by: Laurent Dufour Reviewed-by: Ram Pai