Re: [PATCH] Add testpci command (v2)

[Andrey Borzenkov]

В Ср., 10/10/2012 в 17:21 -0700, Jonathan McDowell пишет:
> On Thu, Sep 27, 2012 at 02:42:11PM -0700, Jonathan McDowell wrote:
> > I have a machine with both Linux and Windows installed on the hard
> > drive. Linux runs on the bare metal and I occasionally run the Windows
> > install in a VM using KVM pointed at /dev/sda. However if I'm not quick
> > enough, or Windows decides to reboot when I'm not around to notice, the
> > grub running under KVM will decide to boot Linux and much confusion
> > ensues.
> > 
> > I couldn't find an easy way to test what the running environment was, so
> > I knocked up a simple testpci command that allows me to test for the
> > existence of a PCI device and change the default boot option based on
> > that. I have:
> > 
> > | if testpci 8086:1237; then
> > |   set default="2"
> > | fi
> > 
> > in my grub.cfg to correctly select the Windows partition if the qemu
> > provided host bridge is present.
> 
> So, a v2, changing to use --vendor/--product and also adding
> --subvendor/--subproduct as it was pointed out to me that the subsystem
> information can be used to confirm the hypervisor presence. I now have:
> 
> | if testpci --vendor=0x8086 --subvendor=0x1af4 --subproduct=0x1100; then
> |   set default="2"
> | fi
> 
> which looks for an Intel device that has a Red Hat / KVM subsystem ID.
> 

Could you also add minimal documentation for it? Otherwise nobody will
even know that command exists :(