[U-Boot] [PATCH v4 0/5] efi_loader: ARM: add support for ARMV7_NONSEC=y

[Mark Kettenis]

This series makes it possible to run EFI applications in non-secure
mode.  It allows me to run OpenBSD on the Technexion PICO-PI-IMX7 and
Banana Pi boards using the PSCI implementation provided by U-Boot.

The second version avoids using r3 to pass the original stack pointer.
For some reason that register gets clobbered on the Banana Pi.  Instead
this version just migrates SP_svc to SP_hyp.

The third version avoids saving r3 on the stack and fixes an include
guard as suggested by Alexander Graf.

This fourth version enables ARMV7_LPAE if HYP mode is supported sych
that we enable the MMU and caches in HYP mode.  It also makes sure we
don't attempt to enter non-secure mode twice if we execute a 2nd EFI
payload.

Mark Kettenis (5):
  ARM: HYP/non-sec: migrate stack
  efi_loader: ARM: run EFI payloads non-secure
  efi_loader: ARM: don't attempt to enter non-secure mode twice
  ARM: HYP/non-sec: enable ARMV7_LPAE if HYP mode is supported
  Revert "efi_loader: no support for ARMV7_NONSEC=y"

 arch/arm/cpu/armv7/Kconfig       |  2 +-
 arch/arm/cpu/armv7/nonsec_virt.S |  2 ++
 cmd/bootefi.c                    | 36 ++++++++++++++++++++++++++++++++++++
 doc/README.uefi                  |  2 --
 lib/efi_loader/Kconfig           |  2 --
 5 files changed, 39 insertions(+), 5 deletions(-)

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2.16.2