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Re: [Xen-devel] [PATCH v7 5/9] PCI: Add pci_iomap_wc() variants
- To: Casey Leedom <leedom@xxxxxxxxxxx>
- From: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
- Date: Fri, 26 Jun 2015 08:51:58 +1000
- Cc: linux-fbdev <linux-fbdev@xxxxxxxxxxxxxxx>, "Michael S. Tsirkin" <mst@xxxxxxxxxx>, "linux-pci@xxxxxxxxxxxxxxx" <linux-pci@xxxxxxxxxxxxxxx>, Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>, ville.syrjala@xxxxxxxxxxxxxxx, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Arnd Bergmann <arnd@xxxxxxxx>, Tomi Valkeinen <tomi.valkeinen@xxxxxx>, Daniel Vetter <daniel.vetter@xxxxxxxx>, Dave Airlie <airlied@xxxxxxxxxx>, Ingo Molnar <mingo@xxxxxxx>, Jean-Christophe Plagniol-Villard <plagnioj@xxxxxxxxxxxx>, Antonino Daplas <adaplas@xxxxxxxxx>, "Luis R. Rodriguez" <mcgrof@xxxxxxxx>, Suresh Siddha <sbsiddha@xxxxxxxxx>, Stefan Bader <stefan.bader@xxxxxxxxxxxxx>, Bjorn Helgaas <bhelgaas@xxxxxxxxxx>, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, Toshi Kani <toshi.kani@xxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, Andy Lutomirski <luto@xxxxxxxxxxxxxx>, David Vrabel <david.vrabel@xxxxxxxxxx>, "venkatesh.pallipadi@xxxxxxxxx" <venkatesh.pallipadi@xxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Thu, 25 Jun 2015 22:54:28 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
On Thu, 2015-06-25 at 21:40 +0000, Casey Leedom wrote:
> Hhmmm, so what do PowerPC Drivers do when they want to take
> advantage of Write Combining? Do their own Endian Swizzling
> with the __raw_*() APIs?
Yeah either, we need to fix our relaxed implementation (patch
welcome :-)
Cheers,
Ben.
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