From patchwork Mon Dec 3 09:30:53 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: KarimAllah Ahmed X-Patchwork-Id: 10708959 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id ED94818A7 for ; Mon, 3 Dec 2018 09:31:36 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id A82532AD9C for ; Mon, 3 Dec 2018 09:31:36 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9CE4E2ADB9; Mon, 3 Dec 2018 09:31:36 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-8.0 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3BDCB2AD9C for ; Mon, 3 Dec 2018 09:31:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726094AbeLCJbs (ORCPT ); Mon, 3 Dec 2018 04:31:48 -0500 Received: from smtp-fw-9101.amazon.com ([207.171.184.25]:18951 "EHLO smtp-fw-9101.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725962AbeLCJbr (ORCPT ); Mon, 3 Dec 2018 04:31:47 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amazon.de; i=@amazon.de; q=dns/txt; s=amazon201209; t=1543829492; x=1575365492; h=from:to:cc:subject:date:message-id; bh=pEbvu2wGMelkIqGN51jd58vwSxnPNRF8SGOTgQHnSpE=; b=ZaaAFtT2IrCp9eOxEtgIS398ZKOe7+WH8VYnTiRwluLmN5id0D32AEDB TGkSsTjX2t6EfhFCSchZ/VwVEwXeGhlDJOFfLvVxCwajbZ6bex9Ls6E/v unBCMJXKBkjOlMmyWOMIGEjRBDzmut8loBcazZrEeKg4ibt2SMqc3SDzW 0=; X-IronPort-AV: E=Sophos;i="5.56,253,1539648000"; d="scan'208";a="773724670" Received: from sea3-co-svc-lb6-vlan3.sea.amazon.com (HELO email-inbound-relay-1e-a70de69e.us-east-1.amazon.com) ([10.47.22.38]) by smtp-border-fw-out-9101.sea19.amazon.com with ESMTP/TLS/DHE-RSA-AES256-SHA; 03 Dec 2018 09:31:29 +0000 Received: from u54e1ad5160425a4b64ea.ant.amazon.com (iad7-ws-svc-lb50-vlan2.amazon.com [10.0.93.210]) by email-inbound-relay-1e-a70de69e.us-east-1.amazon.com (8.14.7/8.14.7) with ESMTP id wB39VOuf107956 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 3 Dec 2018 09:31:26 GMT Received: from u54e1ad5160425a4b64ea.ant.amazon.com (localhost [127.0.0.1]) by u54e1ad5160425a4b64ea.ant.amazon.com (8.15.2/8.15.2/Debian-3) with ESMTP id wB39VMIS018105; Mon, 3 Dec 2018 10:31:22 +0100 Received: (from karahmed@localhost) by u54e1ad5160425a4b64ea.ant.amazon.com (8.15.2/8.15.2/Submit) id wB39VMZd018101; Mon, 3 Dec 2018 10:31:22 +0100 From: KarimAllah Ahmed To: rkrcmar@redhat.com, pbonzini@redhat.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, jmattson@google.com Cc: KarimAllah Ahmed Subject: [PATCH v4 00/14] KVM/X86: Introduce a new guest mapping interface Date: Mon, 3 Dec 2018 10:30:53 +0100 Message-Id: <1543829467-18025-1-git-send-email-karahmed@amazon.de> X-Mailer: git-send-email 2.7.4 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Guest memory can either be directly managed by the kernel (i.e. have a "struct page") or they can simply live outside kernel control (i.e. do not have a "struct page"). KVM mostly support these two modes, except in a few places where the code seems to assume that guest memory must have a "struct page". This patchset introduces a new mapping interface to map guest memory into host kernel memory which also supports PFN-based memory (i.e. memory without 'struct page'). It also converts all offending code to this interface or simply read/write directly from guest memory. As far as I can see all offending code is now fixed except the APIC-access page which I will handle in a seperate series along with dropping kvm_vcpu_gfn_to_page and kvm_vcpu_gpa_to_page from the internal KVM API. The current implementation of the new API uses memremap to map memory that does not have a "struct page". This proves to be very slow for high frequency mappings. Since this does not affect the normal use-case where a "struct page" is available, the performance of this API will be handled by a seperate patch series. v3 -> v4: - Rebase - Add a new patch to also fix the newly introduced enhanced VMCS. v2 -> v3: - Rebase - Add a new patch to also fix the newly introduced shadow VMCS. Filippo Sironi (1): X86/KVM: Handle PFNs outside of kernel reach when touching GPTEs KarimAllah Ahmed (13): X86/nVMX: handle_vmon: Read 4 bytes from guest memory X86/nVMX: handle_vmptrld: Copy the VMCS12 directly from guest memory X86/nVMX: Update the PML table without mapping and unmapping the page KVM: Introduce a new guest mapping API KVM/nVMX: Use kvm_vcpu_map when mapping the L1 MSR bitmap KVM/nVMX: Use kvm_vcpu_map when mapping the virtual APIC page KVM/nVMX: Use kvm_vcpu_map when mapping the posted interrupt descriptor table KVM/X86: Use kvm_vcpu_map in emulator_cmpxchg_emulated KVM/X86: hyperv: Use kvm_vcpu_map in synic_clear_sint_msg_pending KVM/X86: hyperv: Use kvm_vcpu_map in synic_deliver_msg KVM/nSVM: Use the new mapping API for mapping guest memory KVM/nVMX: Use kvm_vcpu_map for accessing the shadow VMCS KVM/nVMX: Use kvm_vcpu_map for accessing the enhanced VMCS arch/x86/kvm/hyperv.c | 28 +++---- arch/x86/kvm/paging_tmpl.h | 38 ++++++--- arch/x86/kvm/svm.c | 97 +++++++++++------------ arch/x86/kvm/vmx.c | 189 +++++++++++++++++---------------------------- arch/x86/kvm/x86.c | 13 ++-- include/linux/kvm_host.h | 9 +++ virt/kvm/kvm_main.c | 50 ++++++++++++ 7 files changed, 228 insertions(+), 196 deletions(-)