[Xen-devel] Re: [GIT PULL] xen: dom0 support for PCI access

[Ingo Molnar <mingo@xxxxxxx>]

( Cc:-ed PCI folks. Original thread with patches is on lkml. There's
  a few details that affect non-Xen PCI code too - and it would be
  nice to see feedback on this general method as well, from the PCI 
  experts . )

* Jeremy Fitzhardinge <jeremy@xxxxxxxx> wrote:

> Hi Ingo,
> 
> This branch allows a Xen dom0 kernel to access PCI devices 
> properly.  Mostly this involves making sure that memory being used 
> for DMA is both logically contigious in the kernel's 
> pseudo-physical memory and physically contigious in machine 
> memory.
> 
> Again, this is pretty much unchanged from the last time I posted it.
> 
> The following changes since commit 0c96e43850feb7c7c4a4950f24533491fbd63b5a:
>   Jeremy Fitzhardinge (1):
>         xen: checkpatch cleanups
> 
> are available in the git repository at:
> 
>   git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git 
> xen-tip/dom0/pci
> 
> Alex Nixon (7):
>       xen: Don't disable the I/O space
>       xen: Allow unprivileged Xen domains to create iomap pages
>       Xen: Rename the balloon lock
>       xen: Add xen_create_contiguous_region
>       x86/PCI: Clean up pci_cache_line_size
>       x86/PCI: Enable scanning of all pci functions
>       Xen/x86/PCI: Add support for the Xen PCI subsytem
> 
> Jeremy Fitzhardinge (4):
>       xen/swiotlb: use dma_alloc_from_coherent to get device coherent memory
>       x86/pci: make sure _PAGE_IOMAP it set on pci mappings
>       xen/pci: clean up Kconfig a bit
>       xen: checkpatch cleanups
> 
>  arch/x86/Kconfig                 |    4 +
>  arch/x86/include/asm/io.h        |    2 +
>  arch/x86/include/asm/pci.h       |    8 +-
>  arch/x86/include/asm/pci_x86.h   |    2 +
>  arch/x86/include/asm/xen/iommu.h |   12 ++
>  arch/x86/kernel/pci-dma.c        |    3 +
>  arch/x86/pci/Makefile            |    1 +
>  arch/x86/pci/common.c            |   18 ++-
>  arch/x86/pci/i386.c              |    3 +
>  arch/x86/pci/init.c              |    6 +
>  arch/x86/pci/xen.c               |   51 +++++++
>  arch/x86/xen/Kconfig             |    2 +
>  arch/x86/xen/enlighten.c         |    6 +-
>  arch/x86/xen/mmu.c               |  225 ++++++++++++++++++++++++++++++-
>  arch/x86/xen/setup.c             |    3 -
>  drivers/pci/Makefile             |    2 +
>  drivers/pci/xen-iommu.c          |  279 
> ++++++++++++++++++++++++++++++++++++++
>  drivers/xen/balloon.c            |   15 +--
>  include/xen/interface/memory.h   |   50 +++++++
>  include/xen/xen-ops.h            |    6 +
>  20 files changed, 671 insertions(+), 27 deletions(-)
>  create mode 100644 arch/x86/include/asm/xen/iommu.h
>  create mode 100644 arch/x86/pci/xen.c
>  create mode 100644 drivers/pci/xen-iommu.c
> 
> Thanks,
>       J

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