From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753858AbaIXH6Q (ORCPT ); Wed, 24 Sep 2014 03:58:16 -0400 Received: from cn.fujitsu.com ([59.151.112.132]:51390 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1750772AbaIXH6O (ORCPT ); Wed, 24 Sep 2014 03:58:14 -0400 X-IronPort-AV: E=Sophos;i="5.04,587,1406563200"; d="scan'208";a="36385359" From: Tang Chen To: , , , , CC: , , , , , Subject: [PATCH v8 0/8] kvm, mem-hotplug: Do not pin ept identity pagetable and apic access page. Date: Wed, 24 Sep 2014 15:57:50 +0800 Message-ID: <1411545478-9848-1-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 v7->v8: 1. Patch 1/9~3/9 were applied to kvm/queue by Paolo Bonzini . Just resend them, no changes. 2. Removed previous patch 4/9, which added unnecessary hook has_secondary_apic_access(). 3. Set kvm_x86_ops->set_apic_access_page_addr to NULL when hardware had no flexpriority functionality which actually exists only on x86. 4. Moved declaration of kvm_arch_mmu_notifier_invalidate_page() to arch/*/include/asm/kvm_host.h. 5. Removed useless set_apic_access_page_addr() hook for svm. Tang Chen (8): 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, 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/arm/include/asm/kvm_host.h | 5 ++ arch/arm64/include/asm/kvm_host.h | 5 ++ arch/ia64/include/asm/kvm_host.h | 7 ++ arch/mips/include/asm/kvm_host.h | 6 ++ arch/powerpc/include/asm/kvm_host.h | 5 ++ arch/s390/include/asm/kvm_host.h | 8 +++ arch/x86/include/asm/kvm_host.h | 7 +- arch/x86/kvm/svm.c | 3 +- arch/x86/kvm/vmx.c | 130 ++++++++++++++++++++++++------------ arch/x86/kvm/x86.c | 45 +++++++++++-- include/linux/kvm_host.h | 2 + virt/kvm/kvm_main.c | 13 ++-- 12 files changed, 180 insertions(+), 56 deletions(-) -- 1.8.3.1