Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753541AbaGIBTn (ORCPT ); Tue, 8 Jul 2014 21:19:43 -0400 Received: from cn.fujitsu.com ([59.151.112.132]:64421 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1752135AbaGIBTl (ORCPT ); Tue, 8 Jul 2014 21:19:41 -0400 X-IronPort-AV: E=Sophos;i="5.00,860,1396972800"; d="scan'208";a="33020264" Message-ID: <53BC98E1.5050006@cn.fujitsu.com> Date: Wed, 9 Jul 2014 09:20:33 +0800 From: Tang Chen User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:12.0) Gecko/20120430 Thunderbird/12.0.1 MIME-Version: 1.0 To: , , CC: Tang Chen , , , , , Subject: Re: [PATCH v2 0/5] kvm, mem-hotplug: Do not pin ept identity pagetable and apic access page. References: <1404824492-30095-1-git-send-email-tangchen@cn.fujitsu.com> In-Reply-To: <1404824492-30095-1-git-send-email-tangchen@cn.fujitsu.com> Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [10.167.226.99] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 07/08/2014 09:01 PM, Tang Chen wrote: > 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. > > Change log v1 -> v2: > 1. Add [PATCH 4/5] to remove unnecessary kvm_arch->ept_identity_pagetable. > 2. In [PATCH 3/5], only introduce KVM_REQ_APIC_PAGE_RELOAD request. s/[PATCH 3/5]/[PATCH 5/5] > 3. In [PATCH 3/5], add set_apic_access_page_addr() for svm. s/[PATCH 3/5]/[PATCH 5/5] > > > Tang Chen (5): > kvm: Add gfn_to_page_no_pin() to translate gfn to page without > pinning. > kvm: Use APIC_DEFAULT_PHYS_BASE macro as the apic access page address. > kvm, mem-hotplug: Do not pin ept identity pagetable in memory. > kvm: Remove ept_identity_pagetable from struct kvm_arch. > kvm, mem-hotplug: Do not pin apic access page in memory. > > arch/x86/include/asm/kvm_host.h | 2 +- > arch/x86/kvm/mmu.c | 11 +++++++++++ > arch/x86/kvm/svm.c | 9 ++++++++- > arch/x86/kvm/vmx.c | 40 ++++++++++++++++++++++------------------ > arch/x86/kvm/x86.c | 16 ++++++++++++++-- > include/linux/kvm_host.h | 3 +++ > virt/kvm/kvm_main.c | 29 ++++++++++++++++++++++++++++- > 7 files changed, 87 insertions(+), 23 deletions(-) > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/