[PATCH RFC 0/6] Introduce Xen support to ARM64

[Stefano Stabellini]

Hi all,
this patch series introduces Xen support to arch/arm64.

As you can see from the following patches, there is very little arm64
specific code here, basically only one assembly file
(arch/arm64/xen/hypercall.S).

Everything else is common with Xen for ARMv7, in particular the code
under arch/arm/xen (enlighten.c and the stubs in grant-table.c) and all
the header files under arch/arm/include/asm/xen (events.h, hypercall.h,
hypervisor.h, interface.h, page.h) can be reused (almost) as-is.

Not knowning what is the best way forward I have just created symlinks
to the original files under arch/arm, see the first patch.

Please advice on what you think is the best way forward.



Stefano Stabellini (6):
      [HACK!] arm64/xen: create links to arch/arm include files and Xen code
      arm64/xen: arm header changes to compile on arm64
      arm64/xen: use XEN_IO_PROTO_ABI_ARM on ARM64
      arm64/xen: introduce asm/hypervisor.h and sys_bitops.h
      arm64/xen: implement xen_remap on arm64
      arm64/xen: introduce CONFIG_XEN and hypercall.S on ARM64

 arch/arm/include/asm/xen/events.h    |    4 +
 arch/arm/include/asm/xen/page.h      |    6 ++
 arch/arm64/Kconfig                   |   11 ++++
 arch/arm64/Makefile                  |    1 +
 arch/arm64/include/asm/hypervisor.h  |    6 ++
 arch/arm64/include/asm/io.h          |    1 +
 arch/arm64/include/asm/sync_bitops.h |   26 ++++++++
 arch/arm64/include/asm/xen           |    1 +
 arch/arm64/xen/Makefile              |    1 +
 arch/arm64/xen/enlighten.c           |    1 +
 arch/arm64/xen/grant-table.c         |    1 +
 arch/arm64/xen/hypercall.S           |  105 ++++++++++++++++++++++++++++++++++
 include/xen/interface/io/protocols.h |    2 +-
 13 files changed, 165 insertions(+), 1 deletions(-)
 create mode 100644 arch/arm64/include/asm/hypervisor.h
 create mode 100644 arch/arm64/include/asm/sync_bitops.h
 create mode 120000 arch/arm64/include/asm/xen
 create mode 100644 arch/arm64/xen/Makefile
 create mode 120000 arch/arm64/xen/enlighten.c
 create mode 120000 arch/arm64/xen/grant-table.c
 create mode 100644 arch/arm64/xen/hypercall.S

- Stefano