From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pavel Fedin Subject: RE: [PATCH v6] arm/arm64: KVM: Detect vGIC presence at runtime Date: Fri, 18 Dec 2015 14:33:24 +0300 Message-ID: <01ab01d13987$e8ba80c0$ba2f8240$@samsung.com> References: <1448968304-10128-1-git-send-email-p.fedin@samsung.com> <20151218112716.GE32720@cbox> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 102DC49731 for ; Fri, 18 Dec 2015 06:31:03 -0500 (EST) Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id TE0t0Rd8B+xM for ; Fri, 18 Dec 2015 06:31:01 -0500 (EST) Received: from mailout3.w1.samsung.com (mailout3.w1.samsung.com [210.118.77.13]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 36612412E6 for ; Fri, 18 Dec 2015 06:31:00 -0500 (EST) Received: from eucpsbgm2.samsung.com (unknown [203.254.199.245]) by mailout3.w1.samsung.com (Oracle Communications Messaging Server 7.0.5.31.0 64bit (built May 5 2014)) with ESMTP id <0NZJ00FT1XFQ6B30@mailout3.w1.samsung.com> for kvmarm@lists.cs.columbia.edu; Fri, 18 Dec 2015 11:33:26 +0000 (GMT) In-reply-to: <20151218112716.GE32720@cbox> Content-language: ru List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu To: 'Christoffer Dall' Cc: 'Marc Zyngier' , kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org List-Id: kvmarm@lists.cs.columbia.edu Hello! > > This patch does not touch any virtual timer code, suggesting that timer > > hardware is actually in place. Normally on boards in question it is true, > > however since vGIC is missing, it is impossible to correctly utilize > > interrupts from the virtual timer. Since virtual timer handling is in > > active redevelopment now, handling in it userspace is out of scope at > > the moment. The guest is currently suggested to use some memory-mapped > > timer which can be emulated in userspace. > > Not sure I understand this paragraph. Either drop it or just say "The > architectured timers are not supported without the in-kernel vGIC." Ok, i'll repost with changed message. But, just to let you know, with this (http://www.spinics.net/lists/kvm/msg124539.html) the notice about architected timer loses its relevancy at all. So, i'll just drop it. Kind regards, Pavel Fedin Expert Engineer Samsung Electronics Research center Russia