From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: [RFC/RFT PATCH v2 0/3] KVM: Introduce KVM_MEM_UNCACHED Date: Thu, 14 May 2015 13:31:03 +0200 Message-ID: <55548777.9000702@redhat.com> References: <1431516714-25816-1-git-send-email-drjones@redhat.com> <20150514103018.GM32765@cbox> <5554826E.1040706@redhat.com> <20150514112910.GR32765@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 811BC51477 for ; Thu, 14 May 2015 07:22:50 -0400 (EDT) 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 AGMFtjrW+ZHW for ; Thu, 14 May 2015 07:22:49 -0400 (EDT) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id 4D0C751474 for ; Thu, 14 May 2015 07:22:48 -0400 (EDT) In-Reply-To: <20150514112910.GR32765@cbox> 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 , Laszlo Ersek Cc: ard.biesheuvel@linaro.org, marc.zyngier@arm.com, catalin.marinas@arm.com, qemu-devel@nongnu.org, kvmarm@lists.cs.columbia.edu List-Id: kvmarm@lists.cs.columbia.edu On 14/05/2015 13:29, Christoffer Dall wrote: > > (It's probably worth looking at the documentation in the first hunk too, > > under the commit message.) > > Why is this a hack/unintuitive? Is the semantics of the QEMU PCI bus > not simply that MMIO regions are coherent? Only until device assignment gets into the picture. Paolo