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Gmane
From: Stefano Stabellini <Stefano.Stabellini <at> eu.citrix.com>
Subject: [PATCH v2 00/23] Introduce Xen support on ARM
Newsgroups: gmane.linux.kernel
Date: Monday 6th August 2012 14:25:08 UTC (over 4 years ago)
Hi all,
this patch series implements Xen support for ARMv7 with virtualization
extensions.  It allows a Linux guest to boot as dom0 and
as domU on Xen on ARM. PV console, disk and network frontends and
backends are all working correctly.

It has been tested on a Versatile Express Cortex A15 emulator, using the
latest Xen ARM developement branch
(git://xenbits.xen.org/people/ianc/xen-unstable.git
arm-for-4.3) plus
the "ARM hypercall ABI: 64 bit ready" patch series
(http://marc.info/?l=xen-devel&m=134426267205408),
and a simple ad-hoc
tool to build guest domains (marc.info/?l=xen-devel&m=134089788016546).

The patch marked with [HACK] shouldn't be applied and is part of the
series only because it is needed to create domUs.

I am also attaching to this email the dts'es that I am currently using
for dom0 and domU: vexpress-v2p-ca15-tc1.dts (that includes
vexpress-v2m-rs1-rtsm.dtsi) is the dts used for dom0 and it is passed to
Linux by Xen, while vexpress-virt.dts is the dts used for other domUs
and it is appended in binary form to the guest kernel image. I am not
sure where they are supposed to live yet, so I am just attaching them
here so that people can actually try out this series if they want to.

Comments are very welcome!


Changes in v2:
- fix up many comments and commit messages;
- remove the early_printk patches: rely on the emulated serial for now;
- remove the xen_guest_init patch: without any PV early_printk, we don't
  need any early call to xen_guest_init, we can rely on core_initcall
  alone;
- define an HYPERCALL macro for 5 arguments hypercall wrappers, even if
  at the moment is unused;
- use ldm instead of pop in the hypercall wrappers;
- return -ENOSYS rather than -1 from the unimplemented grant_table
  functions;
- remove the pvclock ifdef in the Xen headers;
- remove include linux/types.h from xen/interface/xen.h;
- replace pr_info with pr_debug in xen_guest_init;
- add a new patch to introduce xen_ulong_t and use it top replace all
  the occurences of unsigned long in the public Xen interface;
- explicitely size all the pointers to 64 bit on ARM, so that the
  hypercall ABI is "64 bit ready";
- clean up xenbus_init;
- make pci.o depend on CONFIG_PCI and acpi.o depend on CONFIG_ACPI;
- mark Xen guest support on ARM as EXPERIMENTAL;
- introduce GRANT_TABLE_PHYSADDR;
- remove unneeded initialization of boot_max_nr_grant_frames;
- add a new patch to clear IRQ_NOAUTOEN and IRQ_NOREQUEST in events.c;
- return -EINVAL from xen_remap_domain_mfn_range if
  auto_translated_physmap;
- retain binary compatibility in xen_add_to_physmap: use a union to
  introduce foreign_domid.



Ian Campbell (1):
      [HACK] xen/arm: implement xen_remap_domain_mfn_range

Stefano Stabellini (22):
      arm: initial Xen support
      xen/arm: hypercalls
      xen/arm: page.h definitions
      xen/arm: sync_bitops
      xen/arm: empty implementation of grant_table arch specific functions
      xen: missing includes
      xen/arm: Xen detection and shared_info page mapping
      xen/arm: Introduce xen_pfn_t for pfn and mfn types
      xen/arm: Introduce xen_ulong_t for unsigned long
      xen/arm: compile and run xenbus
      xen: do not compile manage, balloon, pci, acpi and cpu_hotplug on ARM
      xen/arm: introduce CONFIG_XEN on ARM
      xen/arm: get privilege status
      xen/arm: initialize grant_table on ARM
      xen/arm: receive Xen events on ARM
      xen: clear IRQ_NOAUTOEN and IRQ_NOREQUEST
      xen/arm: implement alloc/free_xenballooned_pages with
alloc_pages/kfree
      xen: allow privcmd for HVM guests
      xen/arm: compile blkfront and blkback
      xen/arm: compile netback
      xen: update xen_add_to_physmap interface
      arm/v2m: initialize arch_timers even if v2m_timer is not present

 arch/arm/Kconfig                           |   10 ++
 arch/arm/Makefile                          |    1 +
 arch/arm/include/asm/hypervisor.h          |    6 +
 arch/arm/include/asm/sync_bitops.h         |   27 +++
 arch/arm/include/asm/xen/events.h          |   18 ++
 arch/arm/include/asm/xen/hypercall.h       |   69 ++++++++
 arch/arm/include/asm/xen/hypervisor.h      |   19 +++
 arch/arm/include/asm/xen/interface.h       |   72 +++++++++
 arch/arm/include/asm/xen/page.h            |   79 +++++++++
 arch/arm/mach-vexpress/v2m.c               |   11 +-
 arch/arm/xen/Makefile                      |    1 +
 arch/arm/xen/enlighten.c                   |  237
++++++++++++++++++++++++++++
 arch/arm/xen/grant-table.c                 |   53 ++++++
 arch/arm/xen/hypercall.S                   |  106 +++++++++++++
 arch/ia64/include/asm/xen/interface.h      |    6 +-
 arch/x86/include/asm/xen/interface.h       |    8 +
 arch/x86/xen/enlighten.c                   |    1 +
 arch/x86/xen/irq.c                         |    1 +
 arch/x86/xen/mmu.c                         |    3 +
 arch/x86/xen/xen-ops.h                     |    1 -
 drivers/block/xen-blkback/blkback.c        |    1 +
 drivers/net/xen-netback/netback.c          |    1 +
 drivers/net/xen-netfront.c                 |    1 +
 drivers/tty/hvc/hvc_xen.c                  |    2 +
 drivers/xen/Makefile                       |   11 +-
 drivers/xen/events.c                       |   18 ++-
 drivers/xen/grant-table.c                  |    1 +
 drivers/xen/privcmd.c                      |   20 +--
 drivers/xen/xenbus/xenbus_comms.c          |    2 +-
 drivers/xen/xenbus/xenbus_probe.c          |   62 +++++---
 drivers/xen/xenbus/xenbus_probe_frontend.c |    1 +
 drivers/xen/xenbus/xenbus_xs.c             |    1 +
 drivers/xen/xenfs/super.c                  |    7 +
 include/xen/events.h                       |    2 +
 include/xen/interface/features.h           |    3 +
 include/xen/interface/grant_table.h        |    4 +-
 include/xen/interface/io/protocols.h       |    3 +
 include/xen/interface/memory.h             |   32 +++--
 include/xen/interface/physdev.h            |    4 +-
 include/xen/interface/platform.h           |    4 +-
 include/xen/interface/version.h            |    2 +-
 include/xen/interface/xen.h                |   13 +-
 include/xen/privcmd.h                      |    3 +-
 include/xen/xen.h                          |    2 +-
 44 files changed, 857 insertions(+), 72 deletions(-)



A branch based on 3.5-rc7 is available here:

git://xenbits.xen.org/people/sstabellini/linux-pvhvm.git
3.5-rc7-arm-2

Cheers,

Stefano
 
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