From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754370AbaITKqR (ORCPT ); Sat, 20 Sep 2014 06:46:17 -0400 Received: from cn.fujitsu.com ([59.151.112.132]:20742 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1750903AbaITKqQ (ORCPT ); Sat, 20 Sep 2014 06:46:16 -0400 X-IronPort-AV: E=Sophos;i="5.04,559,1406563200"; d="scan'208";a="36212229" From: Tang Chen To: , , , , CC: , , , , , Subject: [PATCH v7 0/9] kvm, mem-hotplug: Do not pin ept identity pagetable and apic access page. Date: Sat, 20 Sep 2014 18:47:42 +0800 Message-ID: <1411210071-14727-1-git-send-email-tangchen@cn.fujitsu.com> X-Mailer: git-send-email 1.9.3 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.167.226.71] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org ept identity pagetable and apic access page in kvm are pinned in memory. As a result, they cannot be migrated/hot-removed. But actually they don't need to be pinned in memory. [For ept identity page] Just do not pin it. When it is migrated, guest will be able to find the new page in the next ept violation. [For apic access page] The hpa of apic access page is stored in VMCS APIC_ACCESS_ADDR pointer. When apic access page is migrated, we update VMCS APIC_ACCESS_ADDR pointer for each vcpu in addition. This patch-set is based on Linux 3.17.0-rc5. NOTE: Tested with -cpu xxx,-x2apic option. But since nested vm pins some other pages in memory, if user uses nested vm, memory hot-remove will not work. Change log v6 -> v7: 1. Patch 1/9~3/9 are applied to kvm/queue by Paolo Bonzini . Just resend them, no changes. 2. In the new patch 4/9, add a new interface to check if secondary exec virtualized apic access is enabled. 3. In new patch 6/9, rename make_all_cpus_request() to kvm_make_all_cpus_request() and make it non-static so that we can use it in other patches. 4. In new patch 8/9, add arch specific function to make apic access page reload request in mmu notifier. Tang Chen (9): kvm: Use APIC_DEFAULT_PHYS_BASE macro as the apic access page address. kvm: Remove ept_identity_pagetable from struct kvm_arch. kvm: Make init_rmode_identity_map() return 0 on success. kvm: Add interface to check if secondary exec virtualzed apic accesses is enabled. kvm, mem-hotplug: Reload L1's apic access page in vcpu_enter_guest(). kvm: Rename make_all_cpus_request() to kvm_make_all_cpus_request() and make it non-static. kvm, mem-hotplug: Reload L1's apic access page on migration when L2 is running. kvm, mem-hotplug: Add arch specific mmu notifier to handle apic access migration. kvm, mem-hotplug: Unpin and remove kvm_arch->apic_access_page. arch/x86/include/asm/kvm_host.h | 6 ++- arch/x86/kvm/svm.c | 15 +++++- arch/x86/kvm/vmx.c | 104 ++++++++++++++++++++++++---------------- arch/x86/kvm/x86.c | 47 ++++++++++++++++-- include/linux/kvm_host.h | 16 ++++++- virt/kvm/kvm_main.c | 13 +++-- 6 files changed, 146 insertions(+), 55 deletions(-) -- 1.8.3.1