minios: blkfront should set protocol node

From: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

mini-os: adding some missing posix function declarations

Adding some missing posix function declarations, to get rid of some
qemu-remote compile time warnings.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

stubdom: fix munmap's update_va_mapping flag passing, thus fixing
INVLPG passing

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

stubdom: add v?errx? and v?warnx? functions

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

mini-os: Fix build failure with void* arithmetic.

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

mini-os: Add printf format checking to xenbus_printf

Reported-by: "Daniel P. Berrange" <berrange@redhat.com>
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

stubdom: support quotes in argument passing

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

stubdom: make munmap work in batches to fix stack overflow

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

mini-os: make xenbus_read_integer and xenbus_printf take const strings

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

stubdom: add syslog functions

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

stubdom: add dummy pthread_mutexattr*

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

stubdom: int32_t is provided by stdint.h, not sys/types.h

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

pv-grub: On x86_64, also build an x86_32 pv-grub

This requires suffixing obj directories and having grub compiled
outside sources.

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

stubdom: for safety, tell lwip we use the heap in the event handler

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

prefix mini-os lists with minios_, drop QEMU_ prefix from QEMU_LIST_*

That permits to reduce the amount of difference with upstream.

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

stubdom: turn off_t 64bit on x86

We can decide to make off_t 64bit instead of implementing the LFS
tricks.  Name corresponding functions foo64 to permit simple caml
programs linking.

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

mini-os: Fix 32bit compilation of fs-front.c

Reported-by: Trolle Selander <trolle.selander@eu.citrix.com>
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

FSIF: extend protocol to multi-grant requests and multi-page ring

To improve throughput and inline the stat response.

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

mini-os: make init_pcifront fail early if there is no backend

Else, we would leave entries in xenstore, which disturbs xend.

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

minios: grant table map (gntdev) bug fixes

 * Uninitialized dev_bus_addr argument to GNTTABOP_unmap_grant_ref
   results in an angry hypervisor.
 * Set errno in libxc and return -1 on error.
 * op.status is a int16_t, so it should be printed with PRId16.
 * Don't print domids[0] or refs[0] if the ptr is NULL. It's more
   polite to crash later, after the message has been printed.

Signed-off-by: Diego Ongaro <diego.ongaro@citrix.com>

minios: Fix build on some gcc versions.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

minios: grant table map (gntdev) for minios

I've implemented a grant map for mini-os to support the xc_gnttab_*()
functions, the equivalent of gntdev in linux. This is useful for my
work in putting xenstored in a stub domain.

Signed-off-by: Diego Ongaro <diego.ongaro@citrix.com>

mini-os: fix FS frontend index reading

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

mini-os: fix fs-front.c debugging prints

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

mini-os: export allocate_ondemand

allocate_ondemand can be used to allocate addresse space. Primarily
used for mapping MFNs, it can also be used e.g. to map grant refs.

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

mini-os is missing list_top in its list.h

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

mini-os: add stack walking debug

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

stubdom: add functions for caml runtime

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

stubdom: fixes for old gcc & binutils

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

stubdom: do not use realpath, new in make 3.81

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

stubdom: Fixes for gcc 4.2.4 32bit
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

stubdom: fixes to compile with qemu-xen

This adds fixes to the stub domain build into compiling Ian Jackson's
qemu-xen.  The most notable change is that mini-os headers now
#include each other through a mini-os/ prefix, so that we can turn all
-I into -isystem and still be sure that we include Mini-OS headers
(and not qemu's console.h or blktaplib's list.h for instance...).

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

Fix a couple of Grzegorz Milos copyright lines.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

minios: Add missing fcntl.h.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

stubdom: add stub functions to reduce qemu patches

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

stubdom: fix copy/paste typo in select()

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

stubdom: fix pass-through compilation

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

stubdom: gcc-4.3 support

It seems we need to provide limits.h in the gcc-4.3 case.

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

stubdom: use host's gcc

This makes stubdom use the host's gcc instead of downloading/compiling
binutils+gcc.  That requires a bunch of changes and even uncovered a
few bugs, but saves a lot of time.

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

minios: PIRQ and MSI/MSI-X support

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

stubdom: PCI passthrough support via PV-PCI

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

merge with xen-unstable.hg

minios: proper frees are now handled, so drop the FIXME comment

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

stubdom: fix libc-verbose non-lwip compilation

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

minios: fix add_id_to_freelist(0)

add_id_to_freelist(0) would make get_id_from_freelist() always return 0.

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

minios: do not systematically free the page under shared info, as the
guest booted by PV-GRUB will need it.

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

merge with xen-unstable.hg

minios: fix gnttab allocation boundary

The gnttab_sem is already fed during initialization's put_free_entry
loop.

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

Add PV-GRUB

This fetches GRUB1 sources, applies the {graphical, print function,
save default, and ext3_256byte} patches from debian, and applies a
patch to make it work on x86_64 and port it to Mini-OS.  By using
libxc, PV-GRUB can then "kexec" the loaded kernel from inside the
domain itself, hence permitting to avoid the security-concerned
pygrub.

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

minios: fix declaration after code

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

stubdom: fix using minios frontends directly when libc is actived

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

minios,stubdom: Add OBJ_DIR parameter to compile outside sources,
which permits to easily compile mini-os in various flavors. Also clean
some parts of stubdom build.

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

minios can cope with >4G CR3 since it never uses it

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

minios: Fix >4GB machine addresses

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

minios/ia64: fix EFI_RUNTIME_SERVICES_SIGNATURE value

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

minios: add proper shutdown facilities

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

stubdom: fetch command line from start_info instead of xenstore

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

stubdom: permit compilation without lwip

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

minios: use inlines instead of macros for bswap*

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

minios: add a blkfront synchronous interface

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

stubdom: Add console reading support

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

stubdom: Save main_thread value by moving it out from app_bss which
gets cleared.

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

stubdom: make the build more generic by moving as many stubdom parts
into stubdom/ as possible.  That also permits to build all of
ioemu, c and caml stubdoms at the same time.

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

minios: We do not need to pin the page tables, as they implicitly get
pinned when we point the permanent page directory to them.

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

minios: Fix width of shifted 1

Shifting 1 more that 32 bits requires 1 to be long-typed.

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

stubdom: fix constructors/destructors in 64bit mode

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

stubdom: fix and clean pthread minimal support

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

stubdom: complete libxc support

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

stubdom: support constructors and destructors

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

minios: free fbfront resources on error/shutdown

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

minios: free blkfront resources on error/shutdown

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

minios: free netfront resources on error/shutdown

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

stubdom: let lwIP check TCP sums as they are now correct.
Signed-off-by: Samuel Thibault <samuel.thibault@eu.citrix.com>

minios: clear FB content since _xmalloc may return non-zeroed memory
(in debug mode, notably).

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

pvfb/ioemu: transmit refresh interval advice from backend to frontend
which permits the frontend to avoid useless polls.

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

i386: Remove non-PAE hypervisor build target.
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>

minios: fix and enforce block_domain atomicity

To ensure that the timer event is not lost, block_domain requires that
event delivery is disabled.  SCHEDOP_block re-enables them, so for
coherency (and fixing a bug actually), we should re-disable them
after. Also, make sure that the caller disabled them.

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

minios: in non-x86 case, use wmb to enforce ordering between
evtchn_upcall_pending and evtchn_pending_sel stores.

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

minios: clear the event before calling the handler since (especially
in the SMP case) the handler may make another domain send an event
again, and that must not be lost.

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

minios: fix port selection shifts

Event selectors span unsigned longs, whose size is not always 32 bits.

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

minios: drop volatile qualifier from some status variables
since we already use memory barriers as approriate to prevent
concurrent access with event handlers.

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

minios: fix thread safety of xenbus watches by requiring callers to
provide their own queue of events, because else we can not dispatch to
watchers running in parallel.

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

minios: end watch of FS backend state value

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

stubdom: make use of PVFB resize event
which with the offset support also permits to expose the VGA vram and
non-shared vram throught PVFB at the same time, switching between both
as appropriate.

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

minios: simplify schedule()
- Merge the search, wakeup, and timeout loops.
- Avoid unnecessarily switching to the idle thread.
- Perform stack release _after_ we get out of it.

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

minios: call do_hypervisor_callback directly from force_evtchn_callback
instead of unnecessarily going through the hypervisor.

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

stubdom: sparse application's BSS by linking it separately first, put
markers at its beginning and end, and then link with mini-os.
That permits to stick a bit more to upstream qemu.

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

stubdom: add asynchronous disk flush support

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

minios: Fix xfree() bug.

It has to check first if the memory to free is so big as to be freed
directly by free_pages. mini-os domains crash without this patch if
vfb is misconfigured.

Signed-off-by: INAKOSHI Hiroya <inakoshi.hiroya@jp.fujitsu.com>

mini-os: Fix build error.
Signed-off-by: Akio Takebe <takebe_akio@jp.fujitsu.com>

minios: blkfront_aio_poll may reenter
if the callback calls blkfront_sync for instance.
In such a case, we would see responses and hence release grants
several times. We need to be more synchronous and stop when we detect
that we have re-entered.
This fixes HVM restore with stubdomains.

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

minios: more assertions
- assert that we never allocate or free the same grant twice
- assert that network packets do not exceed a page
- assert that incoming network event IDs make sense

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

mini-os: free dropped lwip packets
When lwIP can not accept a packet, it is up to us to free it.

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

stubdom: fix x86_64 irq stack size
by making it use STACK_SIZE like other places.

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

minios: get VBD CD/removable/RO info

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

stubdom: add C example target

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

stubdom: fix compilation

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

minios: update README

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

minios: Automatically set IP from XenStore information

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

minios: avoid putting trailing \0 in xenstore

xenstore expects to get the exact amount of data, without
the trailing \0.

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