From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-13.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id D954EC433FE for ; Fri, 4 Dec 2020 05:45:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7F94822581 for ; Fri, 4 Dec 2020 05:45:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728126AbgLDFpB (ORCPT ); Fri, 4 Dec 2020 00:45:01 -0500 Received: from bilbo.ozlabs.org ([203.11.71.1]:37939 "EHLO ozlabs.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728066AbgLDFpA (ORCPT ); Fri, 4 Dec 2020 00:45:00 -0500 Received: by ozlabs.org (Postfix, from userid 1007) id 4CnM8f5b6bz9sT5; Fri, 4 Dec 2020 16:44:18 +1100 (AEDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=gibson.dropbear.id.au; s=201602; t=1607060658; bh=mxWjWsAC0dVXxgKbwgpPWZDm0iZBSpsgilWWeTLy1wA=; h=From:To:Cc:Subject:Date:From; b=VvdNlqruhi8QpiSlhHbtiZmcLN+T/iqxrEaYWyAPqXmFUKeQj43iZdpFnJU378aJq AjsaiHVW2SGmCfXMTOKRxdvm7exQZ1idr85upuRz1XjerQecmgliAPzW6dk5zJeTR/ d/0Gq7iSG0cFDUmkMNUyMSgSdsgWxSXB75PuKVag= From: David Gibson To: pair@us.ibm.com, pbonzini@redhat.com, frankja@linux.ibm.com, brijesh.singh@amd.com, dgilbert@redhat.com, qemu-devel@nongnu.org Cc: Eduardo Habkost , qemu-ppc@nongnu.org, rth@twiddle.net, thuth@redhat.com, berrange@redhat.com, mdroth@linux.vnet.ibm.com, Marcelo Tosatti , "Michael S. Tsirkin" , Marcel Apfelbaum , david@redhat.com, Richard Henderson , borntraeger@de.ibm.com, David Gibson , cohuck@redhat.com, kvm@vger.kernel.org, qemu-s390x@nongnu.org, pasic@linux.ibm.com Subject: [for-6.0 v5 00/13] Generalize memory encryption models Date: Fri, 4 Dec 2020 16:44:02 +1100 Message-Id: <20201204054415.579042-1-david@gibson.dropbear.id.au> X-Mailer: git-send-email 2.28.0 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org A number of hardware platforms are implementing mechanisms whereby the=0D hypervisor does not have unfettered access to guest memory, in order=0D to mitigate the security impact of a compromised hypervisor.=0D =0D AMD's SEV implements this with in-cpu memory encryption, and Intel has=0D its own memory encryption mechanism. POWER has an upcoming mechanism=0D to accomplish this in a different way, using a new memory protection=0D level plus a small trusted ultravisor. s390 also has a protected=0D execution environment.=0D =0D The current code (committed or draft) for these features has each=0D platform's version configured entirely differently. That doesn't seem=0D ideal for users, or particularly for management layers.=0D =0D AMD SEV introduces a notionally generic machine option=0D "machine-encryption", but it doesn't actually cover any cases other=0D than SEV.=0D =0D This series is a proposal to at least partially unify configuration=0D for these mechanisms, by renaming and generalizing AMD's=0D "memory-encryption" property. It is replaced by a=0D "securable-guest-memory" property pointing to a platform specific=0D object which configures and manages the specific details.=0D =0D Changes since v4:=0D * Renamed from "host trust limitation" to "securable guest memory",=0D which I think is marginally more descriptive=0D * Re-organized initialization, because the previous model called at=0D kvm_init didn't work for s390=0D * Assorted fixes to the s390 implementation; rudimentary testing=0D (gitlab CI) only=0D Changes since v3:=0D * Rebased=0D * Added first cut at handling of s390 protected virtualization=0D Changes since RFCv2:=0D * Rebased=0D * Removed preliminary SEV cleanups (they've been merged)=0D * Changed name to "host trust limitation"=0D * Added migration blocker to the PEF code (based on SEV's version)=0D Changes since RFCv1:=0D * Rebased=0D * Fixed some errors pointed out by Dave Gilbert=0D =0D David Gibson (12):=0D securable guest memory: Introduce new securable guest memory base=0D class=0D securable guest memory: Handle memory encryption via interface=0D securable guest memory: Move side effect out of=0D machine_set_memory_encryption()=0D securable guest memory: Rework the "memory-encryption" property=0D securable guest memory: Decouple kvm_memcrypt_*() helpers from KVM=0D sev: Add Error ** to sev_kvm_init()=0D securable guest memory: Introduce sgm "ready" flag=0D securable guest memory: Move SEV initialization into arch specific=0D code=0D spapr: Add PEF based securable guest memory=0D spapr: PEF: prevent migration=0D securable guest memory: Alter virtio default properties for protected=0D guests=0D s390: Recognize securable-guest-memory option=0D =0D Greg Kurz (1):=0D qom: Allow optional sugar props=0D =0D accel/kvm/kvm-all.c | 39 +------=0D accel/kvm/sev-stub.c | 10 +-=0D accel/stubs/kvm-stub.c | 10 --=0D backends/meson.build | 1 +=0D backends/securable-guest-memory.c | 30 +++++=0D hw/core/machine.c | 71 ++++++++++--=0D hw/i386/pc_sysfw.c | 6 +-=0D hw/ppc/meson.build | 1 +=0D hw/ppc/pef.c | 124 +++++++++++++++++++++=0D hw/ppc/spapr.c | 10 ++=0D hw/s390x/pv.c | 58 ++++++++++=0D include/exec/securable-guest-memory.h | 86 +++++++++++++++=0D include/hw/boards.h | 2 +-=0D include/hw/ppc/pef.h | 26 +++++=0D include/hw/s390x/pv.h | 1 +=0D include/qemu/typedefs.h | 1 +=0D include/qom/object.h | 3 +-=0D include/sysemu/kvm.h | 17 ---=0D include/sysemu/sev.h | 5 +-=0D qom/object.c | 4 +-=0D softmmu/vl.c | 16 ++-=0D target/i386/kvm.c | 12 ++=0D target/i386/monitor.c | 1 -=0D target/i386/sev.c | 153 ++++++++++++--------------=0D target/ppc/kvm.c | 18 ---=0D target/ppc/kvm_ppc.h | 6 -=0D target/s390x/kvm.c | 3 +=0D 27 files changed, 510 insertions(+), 204 deletions(-)=0D create mode 100644 backends/securable-guest-memory.c=0D create mode 100644 hw/ppc/pef.c=0D create mode 100644 include/exec/securable-guest-memory.h=0D create mode 100644 include/hw/ppc/pef.h=0D =0D -- =0D 2.28.0=0D =0D