From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [RFC v1] Add declarations for hierarchical memory region API Date: Sun, 22 May 2011 09:39:08 +0300 Message-ID: <4DD8AF8C.5030305@redhat.com> References: <1305814352-15044-1-git-send-email-avi@redhat.com> <1305814352-15044-2-git-send-email-avi@redhat.com> <4DD580FD.2030409@codemonkey.ws> <4DD6331E.8000105@redhat.com> <4DD67563.9080803@twiddle.net> <4DD67B2F.5080907@codemonkey.ws> <4DD67D50.30706@twiddle.net> <4DD67EB8.8050602@codemonkey.ws> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, Richard Henderson To: Anthony Liguori Return-path: In-Reply-To: <4DD67EB8.8050602@codemonkey.ws> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org Sender: qemu-devel-bounces+gceq-qemu-devel=gmane.org@nongnu.org List-Id: kvm.vger.kernel.org On 05/20/2011 05:46 PM, Anthony Liguori wrote: > On 05/20/2011 09:40 AM, Richard Henderson wrote: >> On 05/20/2011 07:31 AM, Anthony Liguori wrote: >>> But is this a characteristic of devices or is this a characteristic >>> of the chipset/CPU? >> >> Chipset. > > So if the chipset only allows accesses that are 64-bit, then you'll > want to have hierarchical dispatch filter non 64-bit accesses and > raise an MCE appropriately. > > So you don't need anything in MemoryRegion, you need code in the > dispatch path. MemoryRegion *is* the dispatch path. Only done declaratively so we can flatten it whenever it changes. -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain.