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[v3,0/2] Xen: ARM: Improved NXP iMX8 platform support

Message ID 20240328163351.64808-1-john.ernberg@actia.se (mailing list archive)
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Series Xen: ARM: Improved NXP iMX8 platform support | expand

Message

John Ernberg March 28, 2024, 4:34 p.m. UTC 
The iMX lpuart driver added at 44e17aa60d47 ("xen/arm: Add i.MX lpuart driver")
is not enough to boot a Linux based dom0 when certain drivers, such as the
watchdog driver, are enabled.

We're also fixing compatibles in imx-lpuart to allow Xen to use the UART
on the QXP variant as well.

When it comes to the watchdog we're currently only implementing the support
for letting Dom0 manage it. There is also a desire for another approach
where Xen kicks the watchdog (dom0-less use-cases etc). This approach is
not covered by this patch set.

NOTE: There is still an open point about the iMX8M* related SIP calls in
the driver and the value of documenting them. There was also a few other
calls noted that weren't implemented because Linux today aren't using them.
I added these as they were part of the discussion if they should be
documented or not.


v3: (see individual patches for detailed changelog)
 - Added a few more SIP calls
 - Become a reviewer of IMX8Q{M,XP} related patches (Bertrand Marquis)

v2: https://lore.kernel.org/xen-devel/20240214160644.3418228-1-john.ernberg@actia.se/
 - Added SIP call filtering (Julien Grall)
 - Replace lpuart compatible instead (Julien Grall)

v1: https://lore.kernel.org/xen-devel/20240131114952.305805-1-john.ernberg@actia.se

John Ernberg (3):
  xen/arm: Add imx8q{m,x} platform glue
  xen/drivers: imx-lpuart: Replace iMX8QM compatible with iMX8QXP
  MAINTAINERS: Become a reviewer of iMX8Q{M,XP} related patches

 MAINTAINERS                     |   5 +
 xen/arch/arm/platforms/Makefile |   1 +
 xen/arch/arm/platforms/imx8qm.c | 168 ++++++++++++++++++++++++++++++++
 xen/drivers/char/imx-lpuart.c   |   2 +-
 4 files changed, 175 insertions(+), 1 deletion(-)
 create mode 100644 xen/arch/arm/platforms/imx8qm.c