CVS commit: src/sys/arch/xen/xen

["Manuel Bouyer" <bouyer%netbsd.org@localhost>]

Module Name:    src
Committed By:   bouyer
Date:           Tue Jul 25 16:15:50 UTC 2023

Modified Files:
        src/sys/arch/xen/xen: xbd_xenbus.c

Log Message:
Propoerly handle 4k sector size backends:
- report the backend's sector size to upper layers, not DEV_BSIZE.
  Adjust the number of sectors accordingly.
- Use sc_secsize instead of XEN_BSIZE where appropriate. The sectors numbers
  in I/O requests are still in XEN_BSIZE units, but must be a multiple
  of sc_secsize/XEN_BSIZE.
- As a consequence of previous, the buffer has to be aligned to sc_secsize,
  aligned to XEN_BSIZE may not be enough. This means that we may have to
  xbd_map_align() more buffer, including some without B_PHYS set.
- Add some more DPRINTF lines, related to I/O requests

Tested with a linux dom0.
thanks to Christian Kujau for providing access to his hardware for testing
and debugging.


To generate a diff of this commit:
cvs rdiff -u -r1.133 -r1.134 src/sys/arch/xen/xen/xbd_xenbus.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.