On ia64, xen-unstable 19698:f72d26c00002 cannot be built:
../../tools/libxc/libxenguest.so: undefined reference to
`xc_core_arch_map_p2m_writable'
../../tools/libxc/libxenguest.so: undefined reference to `xc_map_m2p'
Because xc_offline_page.c requires xc_map_m2p() in xc_domain_save.c,
xc_offline_page.c must be compiled only if CONFIG_MIGRATE=3Dy.
Signed-off-by: KUWAMURA Shin'ya <kuwa@jp.fujitsu.com>
Tmem, when called from a tmem-capable (paravirtualized) guest, makes
use of otherwise unutilized ("fallow") memory to create and manage
pools of pages that can be accessed from the guest either as
"ephemeral" pages or as "persistent" pages. In either case, the pages
are not directly addressible by the guest, only copied to and fro via
the tmem interface. Ephemeral pages are a nice place for a guest to
put recently evicted clean pages that it might need again; these pages
can be reclaimed synchronously by Xen for other guests or other uses.
Persistent pages are a nice place for a guest to put "swap" pages to
avoid sending them to disk. These pages retain data as long as the
guest lives, but count against the guest memory allocation.
Tmem pages may optionally be compressed and, in certain cases, can be
shared between guests. Tmem also handles concurrency nicely and
provides limited QoS settings to combat malicious DoS attempts.
Save/restore and live migration support is not yet provided.
Tmem is primarily targeted for an x86 64-bit hypervisor. On a 32-bit
x86 hypervisor, it has limited functionality and testing due to
limitations of the xen heap. Nearly all of tmem is
architecture-independent; three routines remain to be ported to ia64
and it should work on that architecture too. It is also structured to
be portable to non-Xen environments.
Tmem defaults off (for now) and must be enabled with a "tmem" xen boot
option (and does nothing unless a tmem-capable guest is running). The
"tmem_compress" boot option enables compression which takes about 10x
more CPU but approximately doubles the number of pages that can be
stored.
Tmem can be controlled via several "xm" commands and many interesting
tmem statistics can be obtained. A README and internal specification
will follow, but lots of useful prose about tmem, as well as Linux
patches, can be found at http://oss.oracle.com/projects/tmem .
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
The suspend event channel functions are arch independent code
which xc_save uses.
The changeset of 19382:a5f497f02e34 cause link error on ia64.
This patch moves the functions into arch common file from
x86 specific file xc_domain_save.c
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
In c/s 19009 an incompatible change was made to the ABI of libelf-*,
which are included in libxenctrl and libxenguest. To avoid client
programs (such as python/lowlevel/xc/xc.so) picking up a wrong
version and perhaps crashing, the soname should be changed.
I have chosen the version number 3.4 as xen-unstable is currently the
pre-3.4 branch. I assume we don't care about API/ABI stability within
an unstable branch.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
If you use -MMD -MF then the correct .o filename is written to the
.*.d file as the compiler driver arranges everything. This was done
in 19010:275abe1c5d24 for the hypervisor.
In this patch we do the same elsewhere in the xen-unstable tree,
particularly tools/. Specifically:
* Change tools/Rules.mk to add -MMD -MF ... to CFLAGS and set DEPS.
* Remove -Wp,-MD... from every other Makefile
* Remove setting of DEPS from every other Makefile
* Ensure that every Makefile says -include $(DEPS)
* Ensure that every Makefile's clean target removes $(DEPS)
Some Makefiles were already halfway there, but often for a different
variable name eg PROG_DEP. The variable name is now standardised in
Rules.mk as DEPS.
I have done a test build with this change, on Debian etch.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Sampling and collecting dynamic Px statistic data, including
Px state value, Px count, Px residency time, Px transition
matrix, etc. Provide Px statistic data to user through libxc.
Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
CPUID's replies are now pre-calculated in libxc and given to the
hypervisor via a new domctl.
There are two parts to this feature:
- We can overwrite cpuid's replies.
- We can check that a vm is compatible with a host's processor.
Signed-off-by: Jean Guyader <jean.guyader@eu.citrix.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
The latest -mm kernel (2.6.25-rc3-mm1) contains v2.08 of the Linux
bzImage format which embeds an ELF file in place of the raw payload
allowing it to be extracted and used by the Xen domain builder.
It is expected that this functionality will be put forward for 2.6.26.
Signed-off-by : Ian Campbell <ijc@hellion.org.uk>
- 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>
Preference seems to be to update library versions only when the ABI
changes. Only libxenctrl/libxenguest have their version number changed
to 3.2.0, as a reminder that they change on pretty much every major
release.
libfsimage/libxenstore/libblktap have not changed substantially
recently, hence the ABI has not changed, and version number stays the
same as in Xen 3.1 (and before).
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
* Arrange for the sonames of libxenstore, libxc, libfsimage and
libblktap to be set from a single place in Config.mk.
* Bumps the soname major version number to 3.2 in preparation for
3.2 rc1 after which we do not expect to have ABI changes.
I have not done anything about libaio and libflask. The former is
imported from elsewhere and if we're lucky will have sane versioning
upstream.
libflask has a very small interface and I'm hoping that the XSM
authors have been keeping some ABI discipline.
Signed-off-by: Ian Jackson <ian.jackson@eu.citrix.com>
Fixes correctness issues with xenstored and gcc-4.2.
Original patch by Charles Coffing <ccoffing@novell.com>
Signed-off-by: Keir Fraser <keir@xensource.com>
into xc_domain_save, like we did for xc_domain_restore
Signed-off-by: Tim Deegan <Tim.Deegan@xensource.com>
--HG--
rename : tools/libxc/xc_linux_save.c => tools/libxc/xc_domain_save.c
into one function (and one file) since they share a lot of code
Signed-off-by: Tim Deegan <Tim.Deegan@øensource.com>
--HG--
rename : tools/libxc/xc_linux_restore.c => tools/libxc/xc_domain_restore.c
usage by means of fadvise64() to tell the OS to discard the cache
pages used for the save/dump file.
Signed-off-by: Simon Graham <Simon.Graham@stratus.com>
added PFN-GMFN table for non-auto translated physmap
added PFN table for auto translated physmap.
HVM domain support.
IA64 support
Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
Use the guest's own p2m table instead of xc_get_pfn_list(), which
cannot handle PFNs with no MFN.
Dump a zeroed page for PFNs with no MFN.
Clearly deprecate xc_get_pfn_list().
Do not include a P2M table with HVM domains.
Refuse to dump HVM until we can map its pages with PFNs.
Signed-off-by: John Levon <john.levon@sun.com>
This patch makes libelf available to the tools, by symlinking the source
files and compiling them into libxc.
Signed-off-by: Gerd Hoffmann <kraxel@suse.de>
---
tools/libxc/Makefile | 15 +++++++++++++++
1 file changed, 15 insertions(+)
The idea is that this file is where we will have two implementations
of 'suspend cancellation': one which the guest is aware of (and is
faster) and the other which does more work to avoid requiring guest
modifications.
Signed-off-by: Keir Fraser <keir@xensource.com>
Using strerror_r() is made difficult by the different GNU definition,
and different distros variously choose the POSIX or GNU prototype.
Signed-off-by: Keir Fraser <keir@xensource.com>
Keir Fraser
Keir Fraser
Tim Deegan
Hollis Blanchard
kfraser@localhost.localdomain
Emmanuel Ackaouy