Re: [PATCH 4/4] pci: export untrusted attribute in sysfs

[Greg Kroah-Hartman]

On Thu, Jun 18, 2020 at 12:14:41PM +0300, Andy Shevchenko wrote:
> On Thu, Jun 18, 2020 at 11:36 AM Greg Kroah-Hartman
> <gregkh@xxxxxxxxxxxxxxxxxxx> wrote:
> >
> > On Thu, Jun 18, 2020 at 11:12:56AM +0300, Andy Shevchenko wrote:
> > > On Wed, Jun 17, 2020 at 10:56 PM Rajat Jain <rajatja@xxxxxxxxxx> wrote:
> > > > On Wed, Jun 17, 2020 at 12:31 AM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
> > >
> > > ...
> > >
> > > > (and likely call it "external" instead of "untrusted".
> > >
> > > Which is not okay. 'External' to what? 'untrusted' has been carefully
> > > chosen by the meaning of it.
> > > What external does mean for M.2. WWAN card in my laptop? It's in ACPI
> > > tables, but I can replace it.
> >
> > Then your ACPI tables should show this, there is an attribute for it,
> > right?
> 
> There is a _PLD() method, but it's for the USB devices (or optional
> for others, I don't remember by heart). So, most of the ACPI tables,
> alas, don't show this.

There is something like this for PCI as well, otherwise they wouldn't be
getting this info from "the ether" :)

thanks,

greg k-h