From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Jones Subject: Re: [PATCH kvm-unit-tests] arm: fix crash when caches are off Date: Tue, 16 Sep 2014 08:51:06 -0400 (EDT) Message-ID: <205961557.5030289.1410871866191.JavaMail.zimbra@redhat.com> References: <1410833175-25547-1-git-send-email-drjones@redhat.com> <5417F159.1050501@redhat.com> <198129286.4990140.1410869523048.JavaMail.zimbra@redhat.com> <54182D09.9000700@redhat.com> <1003075385.5021814.1410871383104.JavaMail.zimbra@redhat.com> <5418315B.6020201@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, christoffer dall , marc zyngier To: Paolo Bonzini Return-path: Received: from mx6-phx2.redhat.com ([209.132.183.39]:60117 "EHLO mx6-phx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753393AbaIPMvK (ORCPT ); Tue, 16 Sep 2014 08:51:10 -0400 In-Reply-To: <5418315B.6020201@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: ----- Original Message ----- > Il 16/09/2014 14:43, Andrew Jones ha scritto: > > I don't think we need to worry about this case. AFAIU, enabling the > > caches for a particular cpu shouldn't require any synchronization. > > So we should be able to do > > > > enable caches > > spin_lock > > start other processors > > spin_unlock > > Ok, I'll test and apply your patch then. Actually, yeah, please apply now in order to get A7 boards working. I'll do a follow-on patch to fix the case above (which will require deciding how to hand per cpu data). drew > > Once you change the code to enable caches, please consider hanging on > spin_lock with caches disabled. > > Paolo > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >