From: "Luis R. Rodriguez" <mcgrof@suse.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Russell King <linux@arm.linux.org.uk>,
Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: linux-fbdev <linux-fbdev@vger.kernel.org>,
"Michael S. Tsirkin" <mst@redhat.com>,
"linux-pci@vger.kernel.org" <linux-pci@vger.kernel.org>,
"Dave Hansen" <dave.hansen@linux.intel.com>,
"Jan Beulich" <jbeulich@suse.com>,
"Ville Syrjälä" <ville.syrjala@linux.intel.com>,
"xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>,
"Arnd Bergmann" <arnd@arndb.de>,
"Tomi Valkeinen" <tomi.valkeinen@ti.com>,
"Daniel Vetter" <daniel.vetter@ffwll.ch>,
"Dave Airlie" <airlied@redhat.com>, "Ingo Molnar" <mingo@elte.hu>,
"Jean-Christophe Plagniol-Villard" <plagnioj@jcrosoft.com>,
"Casey Leedom" <leedom@chelsio.com>,
"Antonino Daplas" <adaplas@gmail.com>,
"Suresh Siddha" <sbsiddha@gmail.com>,
"Stefan Bader" <stefan.bader@canonical.com>,
"Bjorn Helgaas" <bhelgaas@google.com>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Juergen Gross" <jgross@suse.com>,
"Toshi Kani" <toshi.kani@hp.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"Andy Lutomirski" <luto@amacapital.net>,
"David Vrabel" <david.vrabel@citrix.com>,
"venkatesh.pallipadi@intel.com" <venkatesh.pallipadi@intel.com>,
"Roger Pau Monné" <roger.pau@citrix.com>
Subject: Re: [Xen-devel] [PATCH v7 5/9] PCI: Add pci_iomap_wc() variants
Date: Fri, 26 Jun 2015 18:16:08 -0700 [thread overview]
Message-ID: <CAB=NE6XrpUYBnu05NL2+Te2e5Kmc39DQWptRWRDMfGD9ygOWKw@mail.gmail.com> (raw)
In-Reply-To: <1435362871.26815.24.camel@kernel.crashing.org>
On Fri, Jun 26, 2015 at 4:54 PM, Benjamin Herrenschmidt
<benh@kernel.crashing.org> wrote:
> On Fri, 2015-06-26 at 15:41 -0700, Luis R. Rodriguez wrote:
>
>> > It wasn't nullified for the main user at the time, the fb. And I
>> > mentioned an IB adapter or two for which the code had been hand
>> tuned.
>>
>> This still means there could be some affected drivers when used on
>> powerpc, no?
>
> Yes. In fact what about things like ARM who also have barriers in their
> writel() ? Won't they also break WC ?
Not sure if they have that write-combine notion on their CPUs /
interconnects. Russel, Stefano, does ARM have write-combining ?
Luis
next prev parent reply other threads:[~2015-06-27 1:16 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-19 22:08 [PATCH v7 0/9] pci: add pci_iomap_wc() and pci_ioremap_wc_bar() Luis R. Rodriguez
2015-06-19 22:08 ` [PATCH v7 1/9] pci: add pci_ioremap_wc_bar() Luis R. Rodriguez
2015-06-19 22:08 ` [PATCH v7 2/9] video: fbdev: i740fb: use arch_phys_wc_add() and pci_ioremap_wc_bar() Luis R. Rodriguez
2015-06-19 22:08 ` [PATCH v7 3/9] video: fbdev: kyrofb: " Luis R. Rodriguez
2015-06-19 22:08 ` [PATCH v7 4/9] video: fbdev: gxt4500: use pci_ioremap_wc_bar() for framebuffer Luis R. Rodriguez
2015-06-19 22:08 ` [PATCH v7 5/9] PCI: Add pci_iomap_wc() variants Luis R. Rodriguez
2015-06-23 22:42 ` Benjamin Herrenschmidt
2015-06-24 16:38 ` Luis R. Rodriguez
2015-06-24 22:05 ` Benjamin Herrenschmidt
2015-06-24 22:29 ` Luis R. Rodriguez
2015-06-24 23:38 ` Benjamin Herrenschmidt
2015-06-25 0:08 ` Luis R. Rodriguez
2015-06-25 0:52 ` Benjamin Herrenschmidt
2015-06-25 0:58 ` [Xen-devel] " Luis R. Rodriguez
2015-06-25 1:12 ` Benjamin Herrenschmidt
2015-06-25 15:01 ` Casey Leedom
2015-06-25 20:44 ` Arnd Bergmann
2015-06-25 21:40 ` Casey Leedom
2015-06-25 22:51 ` Benjamin Herrenschmidt
2015-06-26 19:31 ` Luis R. Rodriguez
2015-06-26 22:04 ` Benjamin Herrenschmidt
[not found] ` <CAB=NE6XwczF6FYXV=RHyK=7ikVk_tGp+h9ouWPyORNENq4+=Kw@mail.gmail.com>
2015-06-26 23:54 ` [Xen-devel] " Benjamin Herrenschmidt
2015-06-27 1:16 ` Luis R. Rodriguez [this message]
2015-06-26 2:02 ` Benjamin Herrenschmidt
2015-06-26 16:24 ` Casey Leedom
2015-06-26 22:00 ` Benjamin Herrenschmidt
2015-07-02 18:49 ` Luis R. Rodriguez
2015-07-02 22:26 ` Benjamin Herrenschmidt
2015-07-03 0:14 ` Casey Leedom
2015-06-19 22:08 ` [PATCH v7 6/9] lib: devres: add pcim_iomap_wc() variants Luis R. Rodriguez
2015-06-19 22:08 ` [PATCH v7 7/9] video: fbdev: arkfb: use arch_phys_wc_add() and pci_iomap_wc() Luis R. Rodriguez
2015-06-19 22:08 ` [PATCH v7 8/9] video: fbdev: s3fb: " Luis R. Rodriguez
2015-06-19 22:08 ` [PATCH v7 9/9] video: fbdev: vt8623fb: " Luis R. Rodriguez
2015-06-23 10:53 ` [PATCH v7 0/9] pci: add pci_iomap_wc() and pci_ioremap_wc_bar() Arnd Bergmann
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