[Xen-devel] [PATCH v3 0/3] introduce XENMEM_get_dma_buf and XENMEM_put_dma_buf

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

Hi all,
this patch series introduces two new hypercalls to allow autotranslate
guests to allocate a contiguous buffer in machine addresses.
The XENMEM_get_dma_buf returns the mfns and makes sure to pin the pages
so that the hypervisor won't change their p2m mappings while in use.
XENMEM_put_dma_buf simply unpins the pages.

Cheers,

Stefano


Changes in v2:
- actually don't print the warning more than once.

Changes in v3:
- implement guest_physmap_pin_range and guest_physmap_unpin_range on
  ARM;
- implement XENMEM_put_dma_buf.



Stefano Stabellini (3):
      xen/arm: implement steal_page
      xen: implement guest_physmap_(un)pin_range
      xen: introduce XENMEM_get_dma_buf and XENMEM_put_dma_buf

 xen/arch/arm/mm.c           |   43 ++++++++++++++
 xen/arch/arm/p2m.c          |  131 +++++++++++++++++++++++++++++++++++++++++++
 xen/common/memory.c         |   73 +++++++++++++++++++++++-
 xen/include/asm-arm/mm.h    |    4 +
 xen/include/asm-arm/page.h  |    6 ++-
 xen/include/asm-x86/p2m.h   |   12 ++++
 xen/include/public/memory.h |   64 +++++++++++++++++++++
 7 files changed, 329 insertions(+), 4 deletions(-)

git://xenbits.xen.org/people/sstabellini/xen-unstable.git get_dma_buf_3

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel