linux-kernel - RE: [PATCH v2 2/2] pci: Support "removable" attribute for PCI devices

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <79b994f2476249498797e1784f735fd7@AcuMS.aculab.com>
Date:   Mon, 26 Apr 2021 13:01:10 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     "'Rafael J. Wysocki'" <rafael@...nel.org>,
        Oliver Neukum <oneukum@...e.com>
CC:     Rajat Jain <rajatja@...gle.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Alan Stern <stern@...land.harvard.edu>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux PCI <linux-pci@...r.kernel.org>,
        "open list:ULTRA-WIDEBAND (UWB) SUBSYSTEM:" 
        <linux-usb@...r.kernel.org>, "Bjorn Helgaas" <helgaas@...nel.org>,
        Rajat Jain <rajatxjain@...il.com>,
        Jesse Barnes <jsbarnes@...gle.com>,
        Dmitry Torokhov <dtor@...gle.com>
Subject: RE: [PATCH v2 2/2] pci: Support "removable" attribute for PCI devices

From: Rafael J. Wysocki
> Sent: 26 April 2021 12:49
> 
> On Mon, Apr 26, 2021 at 11:17 AM Oliver Neukum <oneukum@...e.com> wrote:
> >
> > Am Freitag, den 23.04.2021, 19:16 -0700 schrieb Rajat Jain:
> > > Export the already available info, to the userspace via the
> > > device core, so that userspace can implement whatever policies it
> > > wants to, for external removable devices.
> >
> > Hi,
> >
> > is there a way to tell apart whether a device can undergo regular
> > surprise removal?
> 
> PCI devices located under a removable parent can undergo surprise
> removal.  The ones on a Thunderbolt chain too.
> 
> > Do we want that?
> 
> Do you mean surprise removal?  Yes, we do.

Always been true - think of cardbus (PCI pcmcia) cards with
PCI bridges to external PCI expansion chassis containing
additional PCI slots.
The cardbus card is hot removable.

	David

-
Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK
Registration No: 1397386 (Wales)