From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755575Ab3AXTMW (ORCPT ); Thu, 24 Jan 2013 14:12:22 -0500 Received: from terminus.zytor.com ([198.137.202.10]:33338 "EHLO mail.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755275Ab3AXTMT (ORCPT ); Thu, 24 Jan 2013 14:12:19 -0500 User-Agent: K-9 Mail for Android In-Reply-To: <20130124185943.GA19194@aepfle.de> References: <1358990259-22551-1-git-send-email-kys@microsoft.com> <5101035D02000078000B8FFD@nat28.tlf.novell.com> <27092660926e4d3f80394697cc0dc858@SN2PR03MB061.namprd03.prod.outlook.com> <51016C3202000078000B943E@nat28.tlf.novell.com> <20130124185943.GA19194@aepfle.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH RESEND 1/1] X86: Handle Hyper-V vmbus interrupts as special hypervisor interrupts From: "H. Peter Anvin" Date: Thu, 24 Jan 2013 13:04:09 -0600 To: Olaf Hering , KY Srinivasan CC: Jan Beulich , "bp@alien8.de" , "apw@canonical.com" , "x86@kernel.org" , "tglx@linutronix.de" , "devel@linuxdriverproject.org" , "gregkh@linuxfoundation.org" , "jasowang@redhat.com" , "linux-kernel@vger.kernel.org" Message-ID: <4d9be218-acf5-45a6-aeda-cee592fd74c8@email.android.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Can't you discover Xen emulation by looking for Xen first? Or does Xen go "stealth"? Olaf Hering wrote: >On Thu, Jan 24, KY Srinivasan wrote: > > >> > Question is - considering you stated that this is supported >> > starting in Win8, doesn't Hyper-V itself announce that >> > capability in some explicit way? >> >> Thanks Jan. Unfortunately I don't think tis interrupt delivery model >> is specified via a "feature" bit (I will check with the Windows >guys). >> Perhaps, we can have a Hyper-V specific compilation switch to address >> the Xen emulation issue. > >Would that really help if both pvops XEN_PVHVM and HYPERV are enabled >in >the config? I assume at this point the access to the DMI data is not >yet >possible. > >Olaf -- Sent from my mobile phone. Please excuse brevity and lack of formatting.