stubdom: add support for reading the command line from the config
file, and merge the dmargs with it in the case of qemu.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

stubdom: Add support for select() call with NULL arguments.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

Stubdom: add support for file creation.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

mini-os: fbfront shouldn't send unsolicited updates

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

stubdom: Fix compilation after abs_z to rel_z change
From: Samuel Thibault <samuel.thibault@eu.citrix.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

stubdom: use PVFB so as to e.g. permit SDL display

This adds support in ioemu for PVFB frontend as stubdomain display.
This permits for instance to use SDL in dom0 to perform the eventual
display.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: have xenbus_printf return the error returned by xenbus_write
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

stubdom: fix x86_32 compilation by __moddi3 from FreeBSD
(like has been done previously for umoddi3 etc.)

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: add PVFB support
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: drop unused xenblk_rxidx function
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

stubdom: optimize block io completion polling by not polling all the
time; only when some requests have completed.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

Mini-OS: Fix alignment in maybe_split()
Needed on ia64, speeds up on x86.
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

Add stubdomain support. See stubdom/README for usage details.

- Move PAGE_SIZE and STACK_SIZE into __PAGE_SIZE and __STACK_SIZE in
  arch_limits.h so as to permit getting them from there without
  pulling all the internal Mini-OS defines.
- Setup a xen-elf cross-compilation environment in stubdom/cross-root
- Add a POSIX layer on top of Mini-OS by linking against the newlib C
  library and lwIP, and implementing the Unixish part in mini-os/lib/sys.c
- Cross-compile zlib and libpci too.
- Add an xs.h-compatible layer on top of Mini-OS' xenbus.
- Cross-compile libxc with an additional xc_minios.c and a few things
  disabled.
- Cross-compile ioemu with an additional block-vbd, but without sound,
  tpm and other details.  A few hacks are needed:
  - Align ide and scsi buffers at least on sector size to permit
  direct transmission to the block backend. While we are at it, just
  page-align it to possibly save a segment. Also, limit the scsi
  buffer size because of limitations of the block paravirtualization
  protocol.
  - Allocate big tables dynamically rather that letting them go to
  bss: when Mini-OS gets installed in memory, bss is not lazily
  allocated, and doing so during Mini-OS is unnecessarily trick while
  we can simply use malloc.
- Had to change the Mini-OS compilation somehow, so as to export
  Mini-OS compilation flags to the Makefiles of libxc and ioemu.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: Fix blkfront grant map leak

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: Support net/block backend in domU

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: Fix bug when blkfront reading into zero-mapped buffer
by just poking the page.
No need to use virtual_to_mfn() for the ring since that is a real page.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: Fix ia64 build.
Signed-off-by: Akio Takebe <takebe_akio@jp.fujitsu.com>

minios: permit blkfront to write from mapped memory
Missing call to virtual_to_mfn

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: make allocation of page tables for ondemand mapping lazy

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: permit blkfront to write from mapped memory
by adding a virtual_to_mfn macro

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: POSIX fixes
Fixes some functions which are POSIX.  Also make them ifndef HAVE_LIBC.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: fix case when _text is not 0

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: Fix x86_32 compilation

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: add blkfront testing

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios, blkfront: set default block path.
remove unnecessary path head stripping.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: Add align support to _xmalloc().

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: add lwIP 1.3.0 support

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: make time interface POSIX
timespec uses tv_sec and tv_nsec too. gettimeofday takes a tz
argument.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: do not exit if FS backend not found.
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: support COW for a zero page
Permits to support sparse data.
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: extend map_frames into being able to map a series of
contiguous frames, or the same frame several times, aligned, from
another domain, with specific protection, and with potential
failures.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: set text and rodata read-only, free unused pages 0 and 1
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

Add FS backend/frontend drivers (frontend in minios only).

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

minios: add blkfront

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: support several netfronts

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: add xenbus token support and separate watch event queues

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: add realloc

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>
Signed-off-by: Tim Deegan <tim.deegan@eu.citrix.com>

minios: make stack size configurable

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

minios: add wait_event_deadline

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>
Signed-off-by: Tim Deegan <tim.deegan@eu.citrix.com>

minios: add trydown

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: use ASSERT for BUG_ON

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: Add exit_thread prototype. Make sure exit_thread doesn't
return by accident.

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: Add noreturn attribute to do_exit

Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: Optimize IA64's get_current()

Let gcc access r13 itself, leading to better code

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

In C99 (7.19.6.2.10), the behavior of scanf("stuff... %n", ..., &n) is
said to be undefined if the value to be put is n can't fit.  I guess
we can safely consider that the same applies to printf.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

mini-os: No -fpic when building for x86.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Catch NULL dereferences

Unmap page 0 (only used early at boot) so as to catch NULL dereferences.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Fix strrchr() when string doesn't contain the character.
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Make gnttab allocation/free safe

Add a semaphore to protect gnttab_list from exhaustion, and disable
callbacks during allocation/free.  Fix the network frontend accordingly.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

minios: Revert 16206:7b5b65fbaf61 (xenbus wait fixup)
Already fixed by 14432:f40079acf646.

[Mini-OS] Fix domain blocking race

A callback which wakes a thread may happen between the moment
schedule() gives hand to the idle thread and the latter blocks the
domain.  Idle hence needs to atomically check that no thread is
running and block, else awoken threads may have to wait up to 10
seconds.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Permit x86_64 trap handlers to return

Trap handlers sometimes fix the problem, so they need to be able to
return.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Make sure schedule() is called safely

If a thread tries to sleep from a callback or with callbacks disabled,
Mini-OS will completely lock, so make sure this never happens.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Fix netfront xmit overflow

Fix xmit overflow by making netfront_xmit sleep until
network_tx_buf_gc() frees an xmit request.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Fix net backend path leak

Free backend path after use.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Make wake_up callback-safe

As it may compete with event handlers waking wait queues, wake_up
needs to be callback-safe.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Fix init_waitqueue_entry

Fix initialization of thread_list in init_waitqueue_entry().

Signed-off-by: Samuel Thibault <samuel.thibault@xensource.com>

[Mini-OS] Add init_SEMAPHORE

Add init_SEMAPHORE() to dynamically initialize semaphores.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Make semaphores callback-safe

One may want to use semaphores in event handlers to wake threads
waiting for a resource, so semaphores then need to be callback-safe.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Add strrchr()

Add strrchr(), useful e.g. for grabbing the last part of a xenbus
path.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Add ENOTSUP

Add missing ENOTSUP by defining it to EOPNOTSUPP like in Linux.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Move _ctype into a module

Move the _ctype array into its own module, instead of having it
defined in a header.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Make bind_virq return the port

Make bind_virq() return the port bound to the irq, which is useful
e.g. for masking/unmasking it.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Fix x86 arch_switch_thread

Fix x86 arch_switch_thread by making it pure assembly.
There were missing general register clobbers for x86_64, and BP should
theorically be clobbered too, but gcc does not believe that, so the
only simple safe solution is to use pure assembly.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Optimize get_current()

Let gcc perform the computation with SP itself, leading to yet better
code.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Fix stack closures

So as to make backtracing tools happy, correctly close x86 stacks for
new threads as well as on callback in the x86_32 case since there is
no unwind marker.

Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

[Mini-OS] Fix x86 initial stack alignment

This fixes the initial stack alignment for x86, which is required for
current to return a fine NULL instead of a random value or possibly
crash during initialization.

Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>
Signed-off-by: Samuel Thibault <samuel.thibault@citrix.com>

minios: xenbus wait fixup
From: Samuel Thibault <samuel.thibault@xensource.com>
Signed-off-by: Keir Fraser <keir@xensource.com>

minios: Make NSEC_TO_USEC/NSEC_TO_SEC macros expression safe.
From: Samuel Thibault <samuel.thibault@xensource.com>
Signed-off-by: Keir Fraser <keir@xensource.com>

minios: Fix get_current() inline asm.
From: Samuel Thibault <samuel.thibault@xensource.com>
Signed-off-by: Keir Fraser <keir@xensource.com>

MiniOS: no-stack-protector added to the cflags if needed,
and the default domain config file fixed.

From: Grzegorz Milos <gm281@cam.ac.uk>
Signed-off-by: Keir Fraser <keir@xensource.com>

minios: Remove unnecessary padding and unused sections from x86/64
linker script.
Signed-off-by: Keir Fraser <keir@xensource.com>

merge with xen-unstable.hg

[MINIOS] fix x86_64 p2m map and CFLAGS
Signed-off-by: Tim Deegan <Tim.Deegan@xensource.com>

[IA64][MINIOS] PKR support

- adds optimization feature for region 7 identity mapping
- adds protection keys to region 5 and region 7 addresses,
  may be used for testing the hypervisor protection key support

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

[MINIOS][IA64] mini-os without linux-optimization in hypervisor

Make mini-os runnable again without the special linux optimization for the
identity mapping in the hypervisor.

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

minios: Fix xenbus request-id release.
From: Jacob Gorm Hansen <jacobg@diku.dk>
Signed-off-by: Keir Fraser <keir@xensource.com>

merge with xen-unstable.hg

[IA64][MINIOS] Make Endian-ness build changeable on the command line

Now you can do 'BIGENDIAN=y make'

Signed-off-by: Alex Williamson <alex.williamson@hp.com>

[IA64][MINIOS] Fixed some big-endian bugs and add HYPERVISOR_suspend

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

minios: Various small fixes.

- Fixed type of variables in hypervisor.c.
- Fixed not removing a waiter from watch_queue.
- Make wait_for_watch() global accessible.

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

minios: Fix an extern declaration and add an extra 'const' to
definition of a constant set of constant error strings.
Issues identified by Armand Puccetti.
Signed-off-by: Keir Fraser <keir@xensource.com>

[IA64][MINIOS] cleanup ia64_boot_paramP and add ARCH_LDFLAGS

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

merge with xen-unstable.hg

Create P2M map during Mini-OS boot (fixes 'xm dump-core').
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

Fix PAE Mini-OS build.
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

[IA64][MINIOS] Make mini-os ia64 cross compile-able

Signed-off-by: Tristan Gingold <tgingold@free.fr>

[IA64][MINIOS] Build fix

Fix specifier changed in common minios makerules.

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

merge with xen-unstable.hg

minios: Fix xenbus-id allocation loop.
Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

[IA64][MINIOS] Port of mini-os to ia64

ia64 specific parts of mini-os.

Minimal config:

# Kernel image file.
kernel = "mini-os.gz"
# Initial memory allocation (in megabytes) for the new domain.
memory = 64
# A name for your domain.
name = "Mini-OS"

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

minios: build system cleanups.

- Added ARCH_LDFLAGS for architecture specific LDFLAGS
- Fixed build dependencies after changing makerule files
- Fixed ARCH_CFLAGS for 64bit guest, added ARCH_ASFLAGS
- Couple of variable renames

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

minios: Fix netfront for ia64.
Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

minios: Fix bug in xenbus implementation.
Signed-off-by: Keir Fraser <keir@xensource.com>

minios: Fix ret_from_exception routine. Stack consistency is now preserved.
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

minios : netfront driver fixes.

- Handle returned backend==NULL || mac==NULL, this leads sometimes to a crash.
- Remove unnecessary (and bogus) initialisation of np->rx.req_prod_pvt

Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>
Signed-off-by: Keir Fraser <keir@xensource.com>

[MINIOS] More cleanups for the ia64 port.
Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

[MINIOS] Fix compile warnings with -O.
Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

[MINIOS] Added domctl and sysctl hypercalls to the
architecture-specific header files. Also increased the
__XEN_INTERFACE_VERSION__ to 0x00030205.

Signed-off-by: Derek Murray <Derek.Murray@cl.cam.ac.uk>

[MINIOS] New make structure to support different architectures.
Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>