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Date: Thu, 04 Mar 2010 15:26:35 +0000 From: Ian Campbell <ijc@...lion.org.uk> To: Bastian Blank <waldi@...ian.org> Cc: Stefano Stabellini <stefano.stabellini@...citrix.com>, "xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [Xen-devel] [PATCH 4 of 4] Linux pvops: xen pci platform device driver On Wed, 2010-03-03 at 17:14 +0100, Bastian Blank wrote: > > > During the initialization of the xen pci device driver, we write to > a > > magic ioport that causes qemu to unplug some emulated devices, disc > and > > network in particular. > > This parameter is meant to present the user a choice about what > emulated > > devices to unplug. > > Somehow I don't think this belongs here. It looks like a workaround, > you can always ask qemu to not bind them at the beginning and the > guest system to not provide drivers. Qemu needs to start off providing the devices so that the BIOS and bootloader can do their thing. It's only once the final OS is up and running that we want to swap to the paravirt drivers and this interface provides a safe mechanism to ensure only one set of devices is active at a time. Ian. -- Ian Campbell Current Noise: Spiritual Beggars - Euphoria Usage: fortune -P [-f] -a [xsz] Q: file [rKe9] -v6[+] file1 ... -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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