linux-kernel - Re: [PATCH v2 25/27] ia64: Use generic pci_mmap_resource

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 for Android: free password hash cracker in your pocket

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

Message-ID: <1492072746.17682.127.camel@infradead.org>
Date:   Thu, 13 Apr 2017 09:39:06 +0100
From:   David Woodhouse <dwmw2@...radead.org>
To:     Tony Luck <tony.luck@...il.com>
Cc:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-arch@...r.kernel.org" <linux-arch@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 25/27] ia64: Use generic pci_mmap_resource_range()

On Wed, 2017-04-12 at 14:47 -0700, Tony Luck wrote:
> On Wed, Apr 12, 2017 at 5:26 AM, David Woodhouse <dwmw2@...radead.org> wrote:
> > 
> > From: David Woodhouse <dwmw@...zon.co.uk>
> > 
> > Now that we eliminated the different behaviour in separately-reviewable
> > commits, we can switch IA64 to the generic implementation.
> > 
> > Signed-off-by: David Woodhouse <dwmw@...zon.co.uk>
>
> Well it builds and boots on my last remaining ia64 machine. No warnings
> or weird stuff in the console log.  So you can mark the three ia64 patches

Thanks. The interesting test is whether you can correctly map PCI BARs
through /proc/bus/pci and /sys/bus/pci?

And if you find a prefetchable BAR you can scribble on, does the box
explode if you do it both WC and UC at the same time?

http://david.woodhou.se/pcimmap_copy.c should validate WC mappings and
look something like this...

[fedora@...172-31-55-194 ~]$ sudo ./pcimmap_copy /sys/bus/pci/devices/0000\:00\:1e.0/resource4 0
Copied 1000 loops in 0.354437301s
[fedora@...172-31-55-194 ~]$ sudo ./pcimmap_copy /sys/bus/pci/devices/0000\:00\:1e.0/resource4_wc 0
Copied 1000 loops in 0.057309254s

Download attachment "smime.p7s" of type "application/x-pkcs7-signature" (4938 bytes)