Series introduces some cleanups in console conring and serial
driver buffer management code ending up with adding compile-time
configuration knob for conring size.

Patch 1-2 correct the data types used in conring management code.

Patch 3 updates the conring buffer allocation code.

Patch 4 updates the serial driver buffer allocation code.

Patch 5 optimizes code in conring_puts().

Patch 6 hardens the checks in the serial driver buffer management code.

Patch 7 introduces CONRING_CONRING_SHIFT to select compile-time
conring buffer size.

[1] v7: https://lore.kernel.org/xen-devel/20260713181619.672176-1-dmukhin@ford.com/
[2] CI: https://gitlab.com/xen-project/people/dmukhin/xen/-/pipelines/2710713367

Denis Mukhin (7):
  xen/console: do not use XENCONS_RING_IDX in console_init_ring()
  xen/console: use 'unsigned int' in contring_{flush,puts}()
  xen/console: switch conring runtime allocation to xvmalloc
  xen/serial: switch txbuf runtime allocation to xvmalloc
  xen/console: use memcpy() in conring_puts()
  xen/serial: harden serial_tx_buffer checks
  xen/console: make console buffer size configurable

 docs/misc/xen-command-line.pandoc | 10 ++++-
 xen/drivers/char/Kconfig          | 21 +++++++++++
 xen/drivers/char/console.c        | 61 +++++++++++++++++++++----------
 xen/drivers/char/serial.c         |  6 ++-
 4 files changed, 75 insertions(+), 23 deletions(-)

-- 
2.54.0