From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752554AbeDOVyy (ORCPT ); Sun, 15 Apr 2018 17:54:54 -0400 Received: from smtp-fw-9101.amazon.com ([207.171.184.25]:21598 "EHLO smtp-fw-9101.amazon.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750960AbeDOVyw (ORCPT ); Sun, 15 Apr 2018 17:54:52 -0400 X-IronPort-AV: E=Sophos;i="5.48,456,1517875200"; d="scan'208";a="735371352" From: KarimAllah Ahmed To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org, pbonzini@redhat.com, rkrcmar@redhat.com Cc: KarimAllah Ahmed Subject: [PATCH v2 00/12] KVM/X86: Introduce a new guest mapping interface Date: Sun, 15 Apr 2018 23:53:06 +0200 Message-Id: <1523829198-13236-1-git-send-email-karahmed@amazon.de> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 patch. Filippo Sironi (1): X86/KVM: Handle PFNs outside of kernel reach when touching GPTEs KarimAllah Ahmed (11): 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 arch/x86/kvm/hyperv.c | 28 ++++----- arch/x86/kvm/paging_tmpl.h | 38 +++++++++--- arch/x86/kvm/svm.c | 97 +++++++++++++++--------------- arch/x86/kvm/vmx.c | 145 +++++++++++++++------------------------------ arch/x86/kvm/x86.c | 13 ++-- include/linux/kvm_host.h | 9 +++ virt/kvm/kvm_main.c | 50 ++++++++++++++++ 7 files changed, 203 insertions(+), 177 deletions(-) Cc: Paolo Bonzini Cc: Radim Krčmář Cc: kvm@vger.kernel.org Cc: linux-kernel@vger.kernel.org -- 2.7.4