From patchwork Wed Jul 28 14:52:15 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 12406083 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=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 26249C4338F for ; Wed, 28 Jul 2021 14:53:09 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 08C646100A for ; Wed, 28 Jul 2021 14:53:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237013AbhG1OxJ (ORCPT ); Wed, 28 Jul 2021 10:53:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44512 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236711AbhG1OxG (ORCPT ); Wed, 28 Jul 2021 10:53:06 -0400 Received: from mail-pj1-x1032.google.com (mail-pj1-x1032.google.com [IPv6:2607:f8b0:4864:20::1032]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9050EC0613C1; Wed, 28 Jul 2021 07:53:04 -0700 (PDT) Received: by mail-pj1-x1032.google.com with SMTP id ds11-20020a17090b08cbb0290172f971883bso10453700pjb.1; Wed, 28 Jul 2021 07:53:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Dw5WYuI9KVHFCJFCuZejwMnhkTgwwA05j2VLkdgyjhM=; b=p8qM8rC90F/SM+apT/EKASeB6fk585n2JEbifixZyOxlq6Ktg1+eiu4rOMbpMYscY4 JDfzCVUj9P+r/SbSk8+43y67Xs+hltMLq0r8e1vxWdiJYA32QLDKYaF7utDPLO8dLfdF l4v8OvMGbDTrSVvXSTCaVk15GCPLEQmwD09MewR60DSKGnLNjv+/+EnweU32/41Fs86F 0L1ZWMlpQppSV+tmLg7d76sQrzEVzXrxEo4o6XYH2JXSmSe4szqvA/msBGK3U2Gnbyyg uh7t8h18JFBAPOUiE8jKhEBQHww4hFERe9e7SJLCaJq3eu3vAeflxbBbkXxSHBhPLqqJ zymQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=Dw5WYuI9KVHFCJFCuZejwMnhkTgwwA05j2VLkdgyjhM=; b=m2EvLAlSmFb+lAep2N7Y49cFQejcyV6CSeFiZfAhJ6tYO+Xy7FRPMWBz7cwsxSvQ5u GETFM7SdME9oCr/D7PJVX530zjNARL2xeoAeNaDciLb4OR2n1MOJAZPXi+e0mXPYrCQU CPJ1U6fW4MigdlW1MjQKB/tlhZBd0LwBFfrlhAaKc9PHNuF3uAVG3jlnOjeoq3KhyUq2 A7YolQegtvbhuikfhQx2BHz/CSpqa86t/V46Ce+p+gql5KYziGgOuiwnYRz9EzSiIsqi rRRi3rNjBmOjCqyyBo6cF9H4RRLhj98txXeWPiieRU9qr41I9QrzS8YjH5O5SnrRcOJ8 G76w== X-Gm-Message-State: AOAM532CB26hTB2zwtmIrnBcjjhPAOqVUicdJLfWLz8LTuY28sfrOdih 64O6t0tMX4uK6TQ4iopuAg8= X-Google-Smtp-Source: ABdhPJyvKNqJV0d7lhBz81EV8gx+LUMnHngVQwyGZ1LUs86TzJ1AZOB/8lE8YF+OwPlhBwTvVwzTSQ== X-Received: by 2002:a62:798e:0:b029:327:6d4a:c4db with SMTP id u136-20020a62798e0000b02903276d4ac4dbmr203576pfc.50.1627483984118; Wed, 28 Jul 2021 07:53:04 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:0:3823:141e:6d51:f0ad]) by smtp.gmail.com with ESMTPSA id n134sm277558pfd.89.2021.07.28.07.53.02 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 28 Jul 2021 07:53:03 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, joro@8bytes.org, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, ardb@kernel.org, Tianyu.Lan@microsoft.com, rientjes@google.com, martin.b.radev@gmail.com, akpm@linux-foundation.org, rppt@kernel.org, kirill.shutemov@linux.intel.com, aneesh.kumar@linux.ibm.com, krish.sadhukhan@oracle.com, saravanand@fb.com, xen-devel@lists.xenproject.org, pgonda@google.com, david@redhat.com, keescook@chromium.org, hannes@cmpxchg.org, sfr@canb.auug.org.au, michael.h.kelley@microsoft.com Cc: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, anparri@microsoft.com Subject: [PATCH 00/13] x86/Hyper-V: Add Hyper-V Isolation VM support Date: Wed, 28 Jul 2021 10:52:15 -0400 Message-Id: <20210728145232.285861-1-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Tianyu Lan Hyper-V provides two kinds of Isolation VMs. VBS(Virtualization-based security) and AMD SEV-SNP unenlightened Isolation VMs. This patchset is to add support for these Isolation VM support in Linux. The memory of these vms are encrypted and host can't access guest memory directly. Hyper-V provides new host visibility hvcall and the guest needs to call new hvcall to mark memory visible to host before sharing memory with host. For security, all network/storage stack memory should not be shared with host and so there is bounce buffer requests. Vmbus channel ring buffer already plays bounce buffer role because all data from/to host needs to copy from/to between the ring buffer and IO stack memory. So mark vmbus channel ring buffer visible. There are two exceptions - packets sent by vmbus_sendpacket_ pagebuffer() and vmbus_sendpacket_mpb_desc(). These packets contains IO stack memory address and host will access these memory. So add allocation bounce buffer support in vmbus for these packets. For SNP isolation VM, guest needs to access the shared memory via extra address space which is specified by Hyper-V CPUID HYPERV_CPUID_ ISOLATION_CONFIG. The access physical address of the shared memory should be bounce buffer memory GPA plus with shared_gpa_boundary reported by CPUID. Change sicne RFC V4: - Introduce dma map decrypted function to remap bounce buffer and provide dma map decrypted ops for platform to hook callback. - Split swiotlb and dma map decrypted change into two patches - Replace vstart with vaddr in swiotlb changes. Change since RFC v3: - Add interface set_memory_decrypted_map() to decrypt memory and map bounce buffer in extra address space - Remove swiotlb remap function and store the remap address returned by set_memory_decrypted_map() in swiotlb mem data structure. - Introduce hv_set_mem_enc() to make code more readable in the __set_memory_enc_dec(). Change since RFC v2: - Remove not UIO driver in Isolation VM patch - Use vmap_pfn() to replace ioremap_page_range function in order to avoid exposing symbol ioremap_page_range() and ioremap_page_range() - Call hv set mem host visibility hvcall in set_memory_encrypted/decrypted() - Enable swiotlb force mode instead of adding Hyper-V dma map/unmap hook - Fix code style Tianyu Lan (13): x86/HV: Initialize GHCB page in Isolation VM x86/HV: Initialize shared memory boundary in the Isolation VM. x86/HV: Add new hvcall guest address host visibility support HV: Mark vmbus ring buffer visible to host in Isolation VM HV: Add Write/Read MSR registers via ghcb page HV: Add ghcb hvcall support for SNP VM HV/Vmbus: Add SNP support for VMbus channel initiate message HV/Vmbus: Initialize VMbus ring buffer for Isolation VM DMA: Add dma_map_decrypted/dma_unmap_encrypted() function x86/Swiotlb: Add Swiotlb bounce buffer remap function for HV IVM HV/IOMMU: Enable swiotlb bounce buffer for Isolation VM HV/Netvsc: Add Isolation VM support for netvsc driver HV/Storvsc: Add Isolation VM support for storvsc driver arch/x86/hyperv/Makefile | 2 +- arch/x86/hyperv/hv_init.c | 87 +++++++-- arch/x86/hyperv/ivm.c | 296 +++++++++++++++++++++++++++++ arch/x86/include/asm/hyperv-tlfs.h | 18 ++ arch/x86/include/asm/mshyperv.h | 86 ++++++++- arch/x86/include/asm/sev.h | 4 + arch/x86/kernel/cpu/mshyperv.c | 5 + arch/x86/kernel/sev-shared.c | 21 +- arch/x86/mm/pat/set_memory.c | 6 +- arch/x86/xen/pci-swiotlb-xen.c | 3 +- drivers/hv/Kconfig | 1 + drivers/hv/channel.c | 48 ++++- drivers/hv/connection.c | 71 ++++++- drivers/hv/hv.c | 129 +++++++++---- drivers/hv/hyperv_vmbus.h | 3 + drivers/hv/ring_buffer.c | 84 ++++++-- drivers/hv/vmbus_drv.c | 3 + drivers/iommu/hyperv-iommu.c | 65 +++++++ drivers/net/hyperv/hyperv_net.h | 6 + drivers/net/hyperv/netvsc.c | 144 +++++++++++++- drivers/net/hyperv/rndis_filter.c | 2 + drivers/scsi/storvsc_drv.c | 68 ++++++- include/asm-generic/hyperv-tlfs.h | 1 + include/asm-generic/mshyperv.h | 53 +++++- include/linux/dma-map-ops.h | 9 + include/linux/hyperv.h | 16 ++ include/linux/swiotlb.h | 4 + kernel/dma/mapping.c | 22 +++ kernel/dma/swiotlb.c | 11 +- 29 files changed, 1166 insertions(+), 102 deletions(-) create mode 100644 arch/x86/hyperv/ivm.c