From patchwork Wed Jan 30 06:07:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bharata B Rao X-Patchwork-Id: 1033291 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: ozlabs.org; spf=none (mailfrom) smtp.mailfrom=vger.kernel.org (client-ip=209.132.180.67; helo=vger.kernel.org; envelope-from=kvm-ppc-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=linux.ibm.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 43qCZj3SYkz9sBb for ; Wed, 30 Jan 2019 17:07:41 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726426AbfA3GHk (ORCPT ); Wed, 30 Jan 2019 01:07:40 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:60580 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1725823AbfA3GHk (ORCPT ); Wed, 30 Jan 2019 01:07:40 -0500 Received: from pps.filterd (m0098416.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x0U64PPg075110 for ; Wed, 30 Jan 2019 01:07:39 -0500 Received: from e06smtp01.uk.ibm.com (e06smtp01.uk.ibm.com [195.75.94.97]) by mx0b-001b2d01.pphosted.com with ESMTP id 2qb69c0dp0-1 (version=TLSv1.2 cipher=AES256-GCM-SHA384 bits=256 verify=NOT) for ; Wed, 30 Jan 2019 01:07:38 -0500 Received: from localhost by e06smtp01.uk.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! 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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Wed, 30 Jan 2019 06:07:34 -0000 Received: from d06av21.portsmouth.uk.ibm.com (d06av21.portsmouth.uk.ibm.com [9.149.105.232]) by b06cxnps3074.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id x0U67Wtw53411982 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 30 Jan 2019 06:07:32 GMT Received: from d06av21.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 745875204E; Wed, 30 Jan 2019 06:07:32 +0000 (GMT) Received: from bharata.ibmuc.com (unknown [9.199.36.73]) by d06av21.portsmouth.uk.ibm.com (Postfix) with ESMTP id 5C48B52065; Wed, 30 Jan 2019 06:07:30 +0000 (GMT) From: Bharata B Rao To: linuxppc-dev@lists.ozlabs.org Cc: kvm-ppc@vger.kernel.org, linux-mm@kvack.org, paulus@au1.ibm.com, benh@linux.ibm.com, aneesh.kumar@linux.vnet.ibm.com, jglisse@redhat.com, linuxram@us.ibm.com, sukadev@linux.vnet.ibm.com, Bharata B Rao Subject: [RFC PATCH v3 0/4] kvmppc: HMM backend driver to manage pages of secure guest Date: Wed, 30 Jan 2019 11:37:22 +0530 X-Mailer: git-send-email 2.17.1 X-TM-AS-GCONF: 00 x-cbid: 19013006-4275-0000-0000-000003079FD1 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19013006-4276-0000-0000-00003815A45C Message-Id: <20190130060726.29958-1-bharata@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:, , definitions=2019-01-30_05:, , signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 malwarescore=0 suspectscore=0 phishscore=0 bulkscore=0 spamscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=805 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1901300046 Sender: kvm-ppc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm-ppc@vger.kernel.org Hi, A pseries guest can be run as a secure guest on Ultravisor-enabled POWER platforms. On such platforms, this driver will be used to manage the movement of guest pages between the normal memory managed by hypervisor (HV) and secure memory managed by Ultravisor (UV). Private ZONE_DEVICE memory equal to the amount of secure memory available in the platform for running secure guests is created via a HMM device. The movement of pages between normal and secure memory is done by ->alloc_and_copy() callback routine of migrate_vma(). The page-in or page-out requests from UV will come to HV as hcalls and HV will call back into UV via uvcalls to satisfy these page requests. These patches apply and work on the base Ultravisor patches posted by Ram Pai at https://www.spinics.net/lists/kvm-ppc/msg14981.html Changes in v3 ============= - Rebased to latest kernel - Rebased on top of Ram's base Ultravisor patches, so that all the dependencies are met. - Get secure memory size from device tree. - Fix a mm struct leak in page-in and page-out hcalls, thereby allowing LPID recycling (Thanks to Sukadev Bhattiprolu for pointing this out) v2: https://lists.ozlabs.org/pipermail/linuxppc-dev/2018-November/181669.html Bharata B Rao (4): kvmppc: HMM backend driver to manage pages of secure guest kvmppc: Add support for shared pages in HMM driver kvmppc: H_SVM_INIT_START and H_SVM_INIT_DONE hcalls kvmppc: Handle memory plug/unplug to secure VM arch/powerpc/include/asm/hvcall.h | 9 + arch/powerpc/include/asm/kvm_book3s_hmm.h | 45 ++ arch/powerpc/include/asm/kvm_host.h | 14 + arch/powerpc/include/asm/ucall-api.h | 35 ++ arch/powerpc/include/uapi/asm/uapi_uvcall.h | 5 + arch/powerpc/kvm/Makefile | 3 + arch/powerpc/kvm/book3s_hv.c | 48 ++ arch/powerpc/kvm/book3s_hv_hmm.c | 559 ++++++++++++++++++++ 8 files changed, 718 insertions(+) create mode 100644 arch/powerpc/include/asm/kvm_book3s_hmm.h create mode 100644 arch/powerpc/kvm/book3s_hv_hmm.c