From mboxrd@z Thu Jan 1 00:00:00 1970 From: Suravee Suthikulpanit Subject: Re: [PART1 RFC v3 02/12] KVM: x86: Introducing kvm_x86_ops VM init/uninit hooks Date: Tue, 29 Mar 2016 18:47:02 +0700 Message-ID: <56FA6B36.4030607@amd.com> References: <1458281388-14452-1-git-send-email-Suravee.Suthikulpanit@amd.com> <1458281388-14452-3-git-send-email-Suravee.Suthikulpanit@amd.com> <56EBD438.5000702@redhat.com> <56FA1240.2000600@amd.com> <56FA5737.2090406@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset="windows-1252"; format=flowed Content-Transfer-Encoding: 7bit Cc: , , , To: Paolo Bonzini , , , , , Return-path: Received: from mail-bn1bon0071.outbound.protection.outlook.com ([157.56.111.71]:31648 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752365AbcC2Lr1 (ORCPT ); Tue, 29 Mar 2016 07:47:27 -0400 In-Reply-To: <56FA5737.2090406@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Hi, On 03/29/2016 05:21 PM, Paolo Bonzini wrote: > > > On 29/03/2016 07:27, Suravee Suthikulpanit wrote: >>> >>>>> Adding function pointers in struct kvm_x86_ops for processor-specific >>>>> layer to provide hooks for when KVM initialize and un-initialize VM. >>> This is not the only thing your patch is doing, and the "other" change >>> definitely needs a lot more explanation about why you did it and how you >>> audited the code to ensure that it is safe. >>> >>> Paolo >>> >> >> Sorry, for not mentioning this earlier. I am moving the >> kvm_arch_init_vm() call mainly to go after mutex_init(&kvm->slots_lock) >> since I am calling the x86_set_memory_region() (which uses slots_lock) >> in the vm_init() hooks (for AVIC initialization). >> >> Lemme re-check if this would be safe for other code. > > No problem. In the meanwhile a patch got in ("KVM: fix spin_lock_init > order on x86") that should help you. > > Thanks, > > Paolo > Right.... that's just what I need :) I'll re-base to the latest tip then. Thanks, Suravee