[PATCH v3 00/11] fix swiotlb-xen for RPi4

[Stefano Stabellini <sstabellini@xxxxxxxxxx>]

Hi all,

This series is a collection of fixes to get Linux running on the RPi4 as
dom0. Conceptually there are only two significant changes:

- make sure not to call virt_to_page on vmalloc virt addresses (patch
  #1)
- use phys_to_dma and dma_to_phys to translate phys to/from dma
  addresses (all other patches)


I addressed all comments by Christoph to v2 of the series except from
the one about merging the precursor "add struct device *" patches. I can
always merge them together at any time as needed.


Boris gave his Reviewed-by to the whole series v2. I added his
Reviewed-by to all patches, including the ones with small cosmetic
fixes, except for patch #8 #9 #10 because they are either new or changed
significantly in this version of the series.

I retained Roman and Corey's Tested-by.


Cheers,

Stefano


git://git.kernel.org/pub/scm/linux/kernel/git/sstabellini/xen.git fix-rpi4-v3


Boris Ostrovsky (1):
      swiotlb-xen: use vmalloc_to_page on vmalloc virt addresses

Stefano Stabellini (10):
      swiotlb-xen: remove start_dma_addr
      swiotlb-xen: add struct device * parameter to xen_phys_to_bus
      swiotlb-xen: add struct device * parameter to xen_bus_to_phys
      swiotlb-xen: add struct device * parameter to xen_dma_sync_for_cpu
      swiotlb-xen: add struct device * parameter to xen_dma_sync_for_device
      swiotlb-xen: add struct device * parameter to is_xen_swiotlb_buffer
      swiotlb-xen: remove XEN_PFN_PHYS
      swiotlb-xen: introduce phys_to_dma/dma_to_phys translations
      xen/arm: introduce phys/dma translations in xen_dma_sync_for_*
      xen/arm: call dma_to_phys on the dma_addr_t parameter of dma_cache_maint

 arch/arm/xen/mm.c         |  34 +++++++++++++++----------------
 drivers/xen/swiotlb-xen.c | 119 
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------------------------------------------
 include/xen/page.h        |   1 -
 include/xen/swiotlb-xen.h |   8 ++++----
 4 files changed, 93 insertions(+), 69 deletions(-)