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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Rajat Jain <rajatja@google.com>,
	Christoph Hellwig <hch@infradead.org>,
	David Woodhouse <dwmw2@infradead.org>,
	Lu Baolu <baolu.lu@linux.intel.com>,
	Joerg Roedel <joro@8bytes.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Len Brown <lenb@kernel.org>,
	iommu@lists.linux-foundation.org,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	linux-pci <linux-pci@vger.kernel.org>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	Raj Ashok <ashok.raj@intel.com>,
	"Krishnakumar,
	Lalithambika" <lalithambika.krishnakumar@intel.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.org>,
	Prashant Malani <pmalani@google.com>,
	Benson Leung <bleung@google.com>, Todd Broch <tbroch@google.com>,
	Alex Levin <levinale@google.com>,
	Mattias Nissler <mnissler@google.com>,
	Rajat Jain <rajatxjain@gmail.com>,
	Bernie Keany <bernie.keany@intel.com>,
	Aaron Durbin <adurbin@google.com>,
	Diego Rivas <diegorivas@google.com>,
	Duncan Laurie <dlaurie@google.com>,
	Furquan Shaikh <furquan@google.com>,
	Jesse Barnes <jsbarnes@google.com>,
	Christian Kellner <christian@kellner.me>,
	Alex Williamson <alex.williamson@redhat.com>,
	Oliver O'Halloran <oohall@gmail.com>
Subject: Re: [PATCH 4/4] pci: export untrusted attribute in sysfs
Date: Thu, 18 Jun 2020 16:56:37 +0200	[thread overview]
Message-ID: <20200618145637.GA3017232@kroah.com> (raw)
In-Reply-To: <CAHp75Vf71f2s6yipHJ4Ys1oe1v7L4PiqBCEbo0uBcG7Wpcs5dQ@mail.gmail.com>

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@linuxfoundation.org> 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@google.com> wrote:
> > > > On Wed, Jun 17, 2020 at 12:31 AM Christoph Hellwig <hch@infradead.org> 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

WARNING: multiple messages have this Message-ID (diff)
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: Andy Shevchenko <andy.shevchenko@gmail.com>
Cc: Todd Broch <tbroch@google.com>,
	linux-pci <linux-pci@vger.kernel.org>,
	"Krishnakumar,
	Lalithambika" <lalithambika.krishnakumar@intel.com>,
	Diego Rivas <diegorivas@google.com>,
	Rajat Jain <rajatja@google.com>,
	Jean-Philippe Brucker <jean-philippe@linaro.org>,
	Furquan Shaikh <furquan@google.com>,
	Raj Ashok <ashok.raj@intel.com>,
	Christoph Hellwig <hch@infradead.org>,
	ACPI Devel Maling List <linux-acpi@vger.kernel.org>,
	Christian Kellner <christian@kellner.me>,
	Mattias Nissler <mnissler@google.com>,
	Jesse Barnes <jsbarnes@google.com>, Len Brown <lenb@kernel.org>,
	Rajat Jain <rajatxjain@gmail.com>,
	Prashant Malani <pmalani@google.com>,
	Aaron Durbin <adurbin@google.com>,
	Alex Williamson <alex.williamson@redhat.com>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>,
	Bernie Keany <bernie.keany@intel.com>,
	Duncan Laurie <dlaurie@google.com>,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	iommu@lists.linux-foundation.org,
	Oliver O'Halloran <oohall@gmail.com>,
	Benson Leung <bleung@google.com>,
	David Woodhouse <dwmw2@infradead.org>,
	Alex Levin <levinale@google.com>
Subject: Re: [PATCH 4/4] pci: export untrusted attribute in sysfs
Date: Thu, 18 Jun 2020 16:56:37 +0200	[thread overview]
Message-ID: <20200618145637.GA3017232@kroah.com> (raw)
In-Reply-To: <CAHp75Vf71f2s6yipHJ4Ys1oe1v7L4PiqBCEbo0uBcG7Wpcs5dQ@mail.gmail.com>

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@linuxfoundation.org> 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@google.com> wrote:
> > > > On Wed, Jun 17, 2020 at 12:31 AM Christoph Hellwig <hch@infradead.org> 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
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu

  reply	other threads:[~2020-06-18 14:56 UTC|newest]

Thread overview: 48+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-16  1:17 [PATCH 1/4] pci: Keep the ACS capability offset in device Rajat Jain
2020-06-16  1:17 ` Rajat Jain via iommu
2020-06-16  1:17 ` [PATCH 2/4] pci: set "untrusted" flag for truly external devices only Rajat Jain
2020-06-16  1:17   ` Rajat Jain via iommu
2020-06-16  9:07   ` Mika Westerberg
2020-06-16  9:07     ` Mika Westerberg
2020-06-16  1:17 ` [PATCH 3/4] pci: acs: Enable PCI_ACS_TB for untrusted/external-facing devices Rajat Jain
2020-06-16  1:17   ` Rajat Jain via iommu
2020-06-19 16:10   ` Raj, Ashok
2020-06-19 16:10     ` Raj, Ashok
2020-06-22 23:01     ` Rajat Jain
2020-06-22 23:01       ` Rajat Jain via iommu
2020-06-16  1:17 ` [PATCH 4/4] pci: export untrusted attribute in sysfs Rajat Jain
2020-06-16  1:17   ` Rajat Jain via iommu
2020-06-16  5:57   ` Greg Kroah-Hartman
2020-06-16  5:57     ` Greg Kroah-Hartman
2020-06-16  7:32   ` Christoph Hellwig
2020-06-16  7:32     ` Christoph Hellwig
2020-06-16 19:27     ` Rajat Jain
2020-06-16 19:27       ` Rajat Jain via iommu
2020-06-17  7:31       ` Christoph Hellwig
2020-06-17  7:31         ` Christoph Hellwig
2020-06-17 19:53         ` Rajat Jain
2020-06-17 19:53           ` Rajat Jain via iommu
2020-06-18  6:18           ` Greg Kroah-Hartman
2020-06-18  6:18             ` Greg Kroah-Hartman
2020-06-18  8:12           ` Andy Shevchenko
2020-06-18  8:12             ` Andy Shevchenko
2020-06-18  8:36             ` Greg Kroah-Hartman
2020-06-18  8:36               ` Greg Kroah-Hartman
2020-06-18  9:14               ` Andy Shevchenko
2020-06-18  9:14                 ` Andy Shevchenko
2020-06-18 14:56                 ` Greg Kroah-Hartman [this message]
2020-06-18 14:56                   ` Greg Kroah-Hartman
2020-06-18 15:03                 ` Rajat Jain
2020-06-18 15:03                   ` Rajat Jain via iommu
2020-06-18 15:39                   ` Andy Shevchenko
2020-06-18 15:39                     ` Andy Shevchenko
2020-06-18 16:02                   ` Greg Kroah-Hartman
2020-06-18 16:02                     ` Greg Kroah-Hartman
2020-06-18 16:23                     ` Raj, Ashok
2020-06-18 16:23                       ` Raj, Ashok
2020-06-18 17:23                       ` Rajat Jain
2020-06-18 17:23                         ` Rajat Jain via iommu
2020-06-18 18:46                         ` Greg Kroah-Hartman
2020-06-18 18:46                           ` Greg Kroah-Hartman
2020-06-18 23:58   ` Rajat Jain
2020-06-18 23:58     ` Rajat Jain via iommu

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