From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f46.google.com ([209.85.160.46]:33570 "EHLO mail-pb0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755115Ab2EKPoQ (ORCPT ); Fri, 11 May 2012 11:44:16 -0400 Received: by pbbrp8 with SMTP id rp8so3458247pbb.19 for ; Fri, 11 May 2012 08:44:16 -0700 (PDT) Message-ID: <4FAD33C2.6050109@gmail.com> Date: Fri, 11 May 2012 23:44:02 +0800 From: Jiang Liu MIME-Version: 1.0 To: Gleb Natapov CC: "Michael S. Tsirkin" , linux-pci@vger.kernel.org, seabios@seabios.org, qemu-devel@nongnu.org, jbarnes@virtuousgeek.org, rjw@sisk.pl, alex.williamson@redhat.com, Amos Kong Subject: Re: [SeaBIOS] [RESEND PATCH v3] hotplug: add device per func in ACPI DSDT tables References: <20111214010645.GA2044@morn.localdomain> <20120509072452.14872.92530.stgit@t> <4FABF832.1060708@gmail.com> <20120510174257.GD14647@redhat.com> <4FABFEE9.9060501@gmail.com> <20120511101415.GD15230@redhat.com> In-Reply-To: <20120511101415.GD15230@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-pci-owner@vger.kernel.org List-ID: On 05/11/2012 06:14 PM, Gleb Natapov wrote: >> I'm not familiar with qemu:( >> On native OS, admin could trigger PCI device hotplug operations through >> /sys/bus/pci/slot/xx/power. Not sure whether that's needed for guest OS too. >> > Why is it needed on physical HW? May be it is needed in a VM for the > same reason? As Amos has mentioned, it's used power on/off a PCI device instead of physical hotplug. Not sure whether it's needed in guest OS. --gerry