Re: [GIT PULL] xen: swiotlb support for Xen dom0

From: Jeremy Fitzhardinge
Date: Mon May 11 2009 - 12:58:17 EST


Ingo Molnar wrote:
* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:

Hi Ingo,

This branch adds the swiotlb hooks for Xen dom0. We use swiotlb to handle various device drivers which assume that multipage DMA transfers which are contigious in kernel memory are also contigious in machine memory (mostly lower-performance devices, as high-performance ones already do a good job of scatter-gather).

Following Fujita's suggestion, these changes remove a lot of the placeholder stubs in arch/x86/kernel/pci-swiotlb.c and moves them into the Xen-specific arch/x86/xen/pci-swiotlb.c. (It still relies on overriding the weak functions defined in lib/swiotlb.c.)

The following changes since commit 2af252ab26150b4411889c9eaf1af4c5bf03de78:
Jeremy Fitzhardinge (1):
xen: checkpatch cleanups

Would be nice to have a pull request for this with Fujita-san's acks embedded in the commits, and with a tree based against tip:x86/xen.

I will regenerate the branch with the acks (and Joerg made some comments which I'll address too).

J
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