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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 465EEC3B189 for ; Thu, 13 Feb 2020 21:30:53 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1C8632086A for ; Thu, 13 Feb 2020 21:30:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="beFPM7qy" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387414AbgBMVav (ORCPT ); Thu, 13 Feb 2020 16:30:51 -0500 Received: from mail-pg1-f193.google.com ([209.85.215.193]:41963 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728685AbgBMVav (ORCPT ); Thu, 13 Feb 2020 16:30:51 -0500 Received: by mail-pg1-f193.google.com with SMTP id 70so3787098pgf.8 for ; Thu, 13 Feb 2020 13:30:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=DG+sC065wv/LqT/1QFpUrBb6eJ4oJu7xTukCQgs4qZI=; b=beFPM7qyKZAOPM6XrFUgkxr4sKe18G6WJ44lZKteVhn7xUcVt+5lgnlU5reXySx0py mj38GDA8/I/oNdPPwpfGsECeogJ5pkenZ8o3juAkAex8W7aWjitOXAlWG1AVn0xFr5kZ a/pp5ZXlwA7K70WSGHoHQ7scvR5dgg8vAqgQEZpxoJp75LPVsA8fxCS79/cZcDll7QJf +wBCpLCRvtPKLTq0Z+2yvqBopTDgRkaGbAuoZtVzWhBlBjeDALCakqi7hhftDBVtifya Hv+wpjNhn9Gw4mQV7gmpOYF27rlm8tfbzi1QvbbWWJR6C5ItSRNVQ7TiTqFyXr80aSnS BfZQ== 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:in-reply-to :references:mime-version:content-transfer-encoding; bh=DG+sC065wv/LqT/1QFpUrBb6eJ4oJu7xTukCQgs4qZI=; b=exfUEGXXQnf+dfvZVxW2v7yoQvZnul4zLQQaZ7CbkOScAcBIqtwf0dh+0WVrnXhNzc Ou3yKGmcoVLGSaAGRpBwPm9bpQ+d7lq4gLTiS7sJ74+pBETiAtpHOrrQjkqfaedgjf5i zHHUdnuKafxemV3amIw1xSTLte4wneEjNbJNtKuLnW/Nr+GsKtjPPCRZdzUM1fwgYyUk Y6RoLiTkPFaKiDMHQEFGC9UkBikK8pENtSH2pOSKYD+5v/C2De2A+APf+FTW/fYIkjJq Zg31HirHwHvyUxsiceQQi8S6lmYJFNs+CTwlTieMb2K6yNNDI3HvCSsC4bxW+ai0MpFK z+0Q== X-Gm-Message-State: APjAAAWj4JVFvSt6tmVkWxwFXPus82W/h8HtkUoiJbbUOMMVcEB9hWv6 y01C+mkMdgmPlz2E6e/YZClWR8y6 X-Google-Smtp-Source: APXvYqyC4/eQjrcqgMEtd9bRzFz57SaLWVVcql322CjrzbZzBAKrZ5Uy6k+kTxrjDV6fGdkKFachhQ== X-Received: by 2002:aa7:84cd:: with SMTP id x13mr19792586pfn.130.1581629450470; Thu, 13 Feb 2020 13:30:50 -0800 (PST) Received: from olv0.mtv.corp.google.com ([2620:15c:202:201:9649:82d6:f889:b307]) by smtp.gmail.com with ESMTPSA id s130sm4346683pfc.62.2020.02.13.13.30.49 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Feb 2020 13:30:50 -0800 (PST) From: Chia-I Wu To: kvm@vger.kernel.org Cc: pbonzini@redhat.com, vkuznets@redhat.com, wanpengli@tencent.com, jmattson@google.com, joro@8bytes.org, gurchetansingh@chromium.org, kraxel@redhat.com, dri-devel@lists.freedesktop.org Subject: [RFC PATCH 3/3] RFC: KVM: x86: support KVM_CAP_DMA_MEM Date: Thu, 13 Feb 2020 13:30:36 -0800 Message-Id: <20200213213036.207625-4-olvaffe@gmail.com> X-Mailer: git-send-email 2.25.0.265.gbab2e86ba0-goog In-Reply-To: <20200213213036.207625-1-olvaffe@gmail.com> References: <20200213213036.207625-1-olvaffe@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org When a memslot has KVM_MEM_DMA set, we want VMX_EPT_IPAT_BIT cleared for the memslot. Before that is possible, simply call kvm_arch_register_noncoherent_dma for the memslot. SVM does not have the ignore-pat bit. Guest PAT is always honored. Signed-off-by: Chia-I Wu Cc: Gurchetan Singh Cc: Gerd Hoffmann --- arch/x86/include/uapi/asm/kvm.h | 1 + arch/x86/kvm/x86.c | 6 ++++++ 2 files changed, 7 insertions(+) diff --git a/arch/x86/include/uapi/asm/kvm.h b/arch/x86/include/uapi/asm/kvm.h index 503d3f42da16..578b686e3880 100644 --- a/arch/x86/include/uapi/asm/kvm.h +++ b/arch/x86/include/uapi/asm/kvm.h @@ -48,6 +48,7 @@ #define __KVM_HAVE_XSAVE #define __KVM_HAVE_XCRS #define __KVM_HAVE_READONLY_MEM +#define __KVM_HAVE_DMA_MEM /* Architectural interrupt line count. */ #define KVM_NR_INTERRUPTS 256 diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index fb5d64ebc35d..c89a4647fef6 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3331,6 +3331,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext) case KVM_CAP_GET_TSC_KHZ: case KVM_CAP_KVMCLOCK_CTRL: case KVM_CAP_READONLY_MEM: + case KVM_CAP_DMA_MEM: case KVM_CAP_HYPERV_TIME: case KVM_CAP_IOAPIC_POLARITY_IGNORED: case KVM_CAP_TSC_DEADLINE_TIMER: @@ -10045,6 +10046,11 @@ void kvm_arch_commit_memory_region(struct kvm *kvm, */ if (change != KVM_MR_DELETE) kvm_mmu_slot_apply_flags(kvm, (struct kvm_memory_slot *) new); + + if (change == KVM_MR_CREATE && new->flags & KVM_MEM_DMA) + kvm_arch_register_noncoherent_dma(kvm); + else if (change == KVM_MR_DELETE && old->flags & KVM_MEM_DMA) + kvm_arch_unregister_noncoherent_dma(kvm); } void kvm_arch_flush_shadow_all(struct kvm *kvm) -- 2.25.0.265.gbab2e86ba0-goog