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>

[MINIOS] Clean up final link stage of the build.

Allow extra application objects to be linked against a partial link of
minios with non-global names localised. For now we assume that global
names ill be assigned a xenos_ prefix in due course. We may decide to
choose a different prefix.

Those who wish to finish the link from an external Makefile can link
their own objects against mini-os.o (which must be first in link
order!) and specify the appropriate architecture linker script.

Signed-off-by: Keir Fraser <keir@xensource.com>

[MINIOS] Update __XEN_INTERFACE_VERSION__
Signed-off-by: Keir Fraser <keir@xensource.com>

[MINIOS] Implement a network frontend driver.
Signed-off-by: Jacob Gorm Hansen <jacobg@diku.dk>

[MINIOS] Fix grant-entry freelist maintenance.
Signed-off-by: Jacob Gorm Hansen <jacobg@diku.dk>

[MINIOS] Support xenbus watches.
Signed-off-by: Jacob Gorm Hansen <jacobg@diku.dk>

merge with xen-unstable.hg

[POWERPC] Merge with xen-unstable.hg.
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>

[POWERPC] Merge in outstanding changes from xenppc-unstable.hg.
It's a long story, but basically a small divergence in xenppc-unstable meant a
large number of changesets couldn't be directly imported to xen-unstable, so
this changeset includes all of them.
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>

[MINIOS] Improved unbind_all_ports().
Signed-off-by: Jacob Gorm Hansen <jacobg@diku.dk>

[MINIOS] Switched to new interface for HYPERVISOR_sched_op().
Signed-off-by: Dietmar Hahn <dietmar.hahn@fujitsu-siemens.com>

[MINIOS] Exports a function to have all Xen ports unbound.

This is necessary when using mini-os as the foundation for a boot-loader.

Signed-off-by: Jacob Gorm Hansen <jacobg@diku.dk>

[MINIOS] Refactored mm.c and sched.c. x86 arch specific code got moved to
arch/x86/mm.c and arch/x86/sched.c. Header files were also refactored:
arch specific code got moved to include/x86/arch_mm.h and
include/x86/sched_mm.h.

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

[MINIOS] Delay enabling event delivery at start of day.
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

[MINIOS] Refactor spinlock header for multi-arch support.

I separated the spinlock parts special to the x86 architecture and
moved these to include/x86/arch_spinlock.h. The common code is now in
include/spinlock.h.

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

[MINIOS] Event channel hypercall update for 64-bit guests.
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

[MINIOS] Move initialisation of events (masking event channels)
earlier during the boot process. Otherwise 64bit guests would
sometimes crash.

Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

[MINIOS] Add timer support.

Based on an original patch by Robert Kaiser.

Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

[MINIOS] Added a new file arc/x86/setup.c and moved some x86 specific
initialization stuff from kernel.c there. Two new functions are added
to handle this.

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

[MINIOS] Fix to use new event-channel API properly.
Signed-off-by: Mark Williamson <mark.williamson@cl.cam.ac.uk>

[MINIOS] Declare a __XEN_INTERFACE_VERSION__ to fix the build

[MINIOS] Fix the build after start_info interface changes.
Signed-off-by: Anil Madhavapeddy <anil@xensource.com>

[MINIOS] A first step to re-architecture mini-os for a port to ia64.
Create architecture specific directories below mini-os for sources
and below mini-os/include for headers.

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

[MINI-OS] Add a function mapping grant table error codes to strings.

Signed-off-by: John D. Ramsdell <ramsdell@mitre.org>
Signed-off-by: Steven Smith <sos22@cam.ac.uk>

[MINI-OS] Add evtchn_bind_interdomain to mini-os, allowing clients to
bind to interdomain event channels.

Signed-off-by: John D. Ramsdell <ramsdell@mitre.org>
Signed-off-by: Steven Smith <sos22@cam.ac.uk>

[MINI-OS] Extend alloc_unbound so that the remote domain isn't always dom0.

Signed-off-by: John D. Ramsdell <ramsdell@mitre.org>
Signed-off-by: Steven Smith <sos22@cam.ac.uk>

[MINI-OS] Clean up event channel types in mini-os.

Signed-off-by: John D. Ramsdell <ramsdell@mitre.org>
Signed-off-by: Steven Smith <sos22@cam.ac.uk>

[MINI-OS] unbind_virq is broken and nobody uses it.  Remove it.

Signed-off-by: Steven Smith <sos22@cam.ac.uk>

[MINI-OS] Fix a bug which prevented map_frames being used more than once.
Found by John D. Ramsdell <ramsdell@mitre.org>

Signed-off-by: Steven Smith <sos22@cam.ac.uk>

[MINIOS] Mapping page frames on demand added to the memory management.

Signed-off-by: Steven Smith <sos22@cam.ac.uk>
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

[MINIOS]Mapping page frames on demand added to the memory management.
Signed-off-by: Steven Smith <sos22@cam.ac.uk>
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

[MINIOS]Events handling cleaned up. The interface extended to provide
void* pointer to handlers.
Signed-off-by: Steven Smith <sos22@cam.ac.uk>
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>

[MINIOS] XenBus tests disabled in MiniOS. Xend bug induced
by write to device/vif/0.
Signed-off-by: Grzegorz Milos <gm281@cam.ac.uk>