[PATCH 0/3] Initial support for Power

[Shawn Anastasio <shawn@xxxxxxxxxx>]

Hello all,

This patch series adds support for building a minimal image
(head.o-only) for Power ISA 2.07B+ (POWER8+) systems. The first patch
boots to an infinite loop and the second adds early serial console
support on pseries VMs, with bare metal support planned next.

Since Xen previously had support for a much older version of the ISA in
version 3.2.3, we were able to carry over some headers and support
routines from that version. Unlike that initial port though, this effort
focuses solely on POWER8+ CPUs that are capable of running in Little
Endian mode.

With an appropriate powerpc64le-linux-gnu cross-toolchain, the minimal
image can be built with:

$ make XEN_TARGET_ARCH=ppc64 -C xen openpower_defconfig
$ make XEN_TARGET_ARCH=ppc64 SUBSYSTEMS=xen -C xen TARGET=ppc64/head.o

The resulting head.o can then be booted in a standard QEMU/pseries VM:

$ qemu-system-ppc64 -M pseries-5.2 -m 256M -kernel xen/ppc64/head.o \
        -vga none -serial mon:stdio -nographic

Thanks,
Shawn

Shawn Anastasio (3):
  xen: Add files needed for minimal Power build
  xen/ppc: Implement early serial printk on PaPR/pseries
  maintainers: Add PPC64 maintainer

 MAINTAINERS                              |   3 +
 config/ppc64.mk                          |   5 +
 xen/Makefile                             |   5 +-
 xen/arch/ppc/Kconfig                     |  42 +++++
 xen/arch/ppc/Kconfig.debug               |   5 +
 xen/arch/ppc/Makefile                    |  18 ++
 xen/arch/ppc/Rules.mk                    |   0
 xen/arch/ppc/arch.mk                     |  11 ++
 xen/arch/ppc/boot_of.c                   | 122 +++++++++++++
 xen/arch/ppc/configs/openpower_defconfig |  14 ++
 xen/arch/ppc/early_printk.c              |  36 ++++
 xen/arch/ppc/include/asm/boot.h          |  31 ++++
 xen/arch/ppc/include/asm/bug.h           |   6 +
 xen/arch/ppc/include/asm/byteorder.h     |  74 ++++++++
 xen/arch/ppc/include/asm/cache.h         |   6 +
 xen/arch/ppc/include/asm/config.h        |  66 +++++++
 xen/arch/ppc/include/asm/early_printk.h  |  14 ++
 xen/arch/ppc/include/asm/msr.h           |  67 +++++++
 xen/arch/ppc/include/asm/page-bits.h     |   7 +
 xen/arch/ppc/include/asm/processor.h     | 223 +++++++++++++++++++++++
 xen/arch/ppc/include/asm/reg_defs.h      | 218 ++++++++++++++++++++++
 xen/arch/ppc/include/asm/string.h        |   6 +
 xen/arch/ppc/include/asm/types.h         |  64 +++++++
 xen/arch/ppc/ppc64/Makefile              |   1 +
 xen/arch/ppc/ppc64/asm-offsets.c         |  55 ++++++
 xen/arch/ppc/ppc64/head.S                | 126 +++++++++++++
 xen/arch/ppc/setup.c                     |  32 ++++
 xen/arch/ppc/xen.lds.S                   | 173 ++++++++++++++++++
 28 files changed, 1428 insertions(+), 2 deletions(-)
 create mode 100644 config/ppc64.mk
 create mode 100644 xen/arch/ppc/Kconfig
 create mode 100644 xen/arch/ppc/Kconfig.debug
 create mode 100644 xen/arch/ppc/Makefile
 create mode 100644 xen/arch/ppc/Rules.mk
 create mode 100644 xen/arch/ppc/arch.mk
 create mode 100644 xen/arch/ppc/boot_of.c
 create mode 100644 xen/arch/ppc/configs/openpower_defconfig
 create mode 100644 xen/arch/ppc/early_printk.c
 create mode 100644 xen/arch/ppc/include/asm/boot.h
 create mode 100644 xen/arch/ppc/include/asm/bug.h
 create mode 100644 xen/arch/ppc/include/asm/byteorder.h
 create mode 100644 xen/arch/ppc/include/asm/cache.h
 create mode 100644 xen/arch/ppc/include/asm/config.h
 create mode 100644 xen/arch/ppc/include/asm/early_printk.h
 create mode 100644 xen/arch/ppc/include/asm/msr.h
 create mode 100644 xen/arch/ppc/include/asm/page-bits.h
 create mode 100644 xen/arch/ppc/include/asm/processor.h
 create mode 100644 xen/arch/ppc/include/asm/reg_defs.h
 create mode 100644 xen/arch/ppc/include/asm/string.h
 create mode 100644 xen/arch/ppc/include/asm/types.h
 create mode 100644 xen/arch/ppc/ppc64/Makefile
 create mode 100644 xen/arch/ppc/ppc64/asm-offsets.c
 create mode 100644 xen/arch/ppc/ppc64/head.S
 create mode 100644 xen/arch/ppc/setup.c
 create mode 100644 xen/arch/ppc/xen.lds.S

-- 
2.30.2