From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Fedin Subject: RE: [PATCH 3/3] KVM: arm64: Implement accessors for vGIC CPU interface registers Date: Tue, 01 Sep 2015 16:09:18 +0300 Message-ID: <010801d0e4b7$698757d0$3c960770$@samsung.com> References: <2857f7cad7c17109dfa3028f79af28893c0171ce.1440766141.git.p.fedin@samsung.com> <20150830165015.GE24113@cbox> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Return-path: In-reply-to: <20150830165015.GE24113@cbox> Content-language: ru Sender: kvm-owner@vger.kernel.org To: 'Christoffer Dall' Cc: kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, 'Marc Zyngier' List-Id: kvmarm@lists.cs.columbia.edu Hello! > Have you thought about proper locking/serializing of access to the GIC > state in these accessor functions? I am in the process of rewriting the whole thing, and i came to this point. What kind of locking would you expect ? It's a CPU interface, it does not affect state of any other vCPUs. And, since i am getting/setting its registers, i assume that the vCPU is not running. Well, i added the check. What next? Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia