From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932075AbeCIOCy (ORCPT ); Fri, 9 Mar 2018 09:02:54 -0500 Received: from mx3-rdu2.redhat.com ([66.187.233.73]:34092 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751056AbeCIOCx (ORCPT ); Fri, 9 Mar 2018 09:02:53 -0500 From: Vitaly Kuznetsov To: kvm@vger.kernel.org Cc: x86@kernel.org, Paolo Bonzini , =?UTF-8?q?Radim=20Kr=C4=8Dm=C3=A1=C5=99?= , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , "Michael Kelley (EOSG)" , Mohammed Gamal , Cathy Avery , Bandan Das , linux-kernel@vger.kernel.org Subject: [PATCH v3 0/7] Enlightened VMCS support for KVM on Hyper-V Date: Fri, 9 Mar 2018 15:02:42 +0100 Message-Id: <20180309140249.2840-1-vkuznets@redhat.com> 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 Changes since v2: - Move hyperv.h out of uapi [Radim Krčmář], PATCHes 1 and 2 added. - define KVM_EVMCS_VERSION, HV_X64_ENLIGHTENED_VMCS_VERSION [Radim Krčmář] - WARN_ONCE in get_evmcs_offset[,_cf] [Radim Krčmář] - add evmcs_sanitize_exec_ctrls() and use it in hardware_setup() and dump_vmcs() [Radim Krčmář] When running nested KVM on Hyper-V it's possible to use so called 'Enlightened VMCS' and do normal memory reads/writes instead of doing VMWRITE/VMREAD instructions. In addition, clean field mask provides a huge room for optimization on L0's side. Tight CPUID loop test shows significant speedup (E5-2667 v4 @ 3.20GHz): Before: 18890 cycles After: 8304 cycles Ladi Prosek (1): x86/kvm: rename HV_X64_MSR_APIC_ASSIST_PAGE to HV_X64_MSR_VP_ASSIST_PAGE Vitaly Kuznetsov (6): x86/hyper-v: move hyperv.h out of uapi x86/hyper-v: move definitions from TLFS to hyperv-tlfs.h x86/hyper-v: allocate and use Virtual Processor Assist Pages x86/hyper-v: define struct hv_enlightened_vmcs and clean field bits x86/hyper-v: detect nested features x86/kvm: use Enlightened VMCS when running on Hyper-V MAINTAINERS | 2 +- arch/x86/hyperv/hv_init.c | 35 +- arch/x86/include/asm/hyperv-tlfs.h | 695 +++++++++++++++++++++++++++++++++++ arch/x86/include/asm/kvm_host.h | 1 + arch/x86/include/asm/mshyperv.h | 91 +---- arch/x86/include/uapi/asm/hyperv.h | 421 --------------------- arch/x86/include/uapi/asm/kvm_para.h | 1 - arch/x86/kernel/cpu/mshyperv.c | 21 +- arch/x86/kvm/hyperv.c | 8 +- arch/x86/kvm/lapic.h | 2 +- arch/x86/kvm/vmx.c | 625 ++++++++++++++++++++++++++++++- arch/x86/kvm/x86.c | 2 +- drivers/hv/connection.c | 1 - drivers/hv/hv.c | 1 - drivers/hv/hyperv_vmbus.h | 1 + drivers/hv/vmbus_drv.c | 1 - include/linux/hyperv.h | 1 - 17 files changed, 1379 insertions(+), 530 deletions(-) create mode 100644 arch/x86/include/asm/hyperv-tlfs.h delete mode 100644 arch/x86/include/uapi/asm/hyperv.h -- 2.14.3