From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:32974) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UmJVw-0008Jm-2V for qemu-devel@nongnu.org; Tue, 11 Jun 2013 04:01:13 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UmJVu-0002t9-3v for qemu-devel@nongnu.org; Tue, 11 Jun 2013 04:01:12 -0400 Received: from mx1.redhat.com ([209.132.183.28]:7346) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UmJVt-0002sy-TC for qemu-devel@nongnu.org; Tue, 11 Jun 2013 04:01:10 -0400 Message-ID: <51B6D924.6010802@redhat.com> Date: Tue, 11 Jun 2013 10:00:36 +0200 From: Gerd Hoffmann MIME-Version: 1.0 References: <1370882347-31129-1-git-send-email-mst@redhat.com> <51B6B68E.9040508@redhat.com> <20130611065525.GB31474@redhat.com> <51B6D4E5.2070100@redhat.com> <20130611075314.GG31474@redhat.com> In-Reply-To: <20130611075314.GG31474@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH] qemu: piix: PCI bridge ACPI hotplug support List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: "Michael S. Tsirkin" Cc: Peter Maydell , Anthony Liguori , David Woodhouse , seabios@seabios.org, qemu-devel@nongnu.org, Kevin O'Connor , Jordan Justen , Laszlo Ersek Hi, > Yes and not just because of windows guests. > ACPI spec is also very explicit that native hotplug is an optional > feature. Test suites such as WHQL are known to test spec compliance. /me looks a bit surprised. This pretty much implies that any shpc bridge needs a second interface to the hotplug functionality which can be driven via ACPI. Or the firmware somehow handles this using smm (not sure this works for the IRQ though). Do you know how this is handled by real hardware? cheers, Gerd