The main idea of this patch is:
1) The admin sets aside some memory below 128G for 32-bit paravirtual
domain creation (via dom0_mem=-<value> in kernel comand line).
2) The admin also explicitly states to the tools (i..e xend) how much
memory is supposed to be left untouched by 64-bit domains
3) If a 32-bit pv DomU gets created, no ballooning ought to be
necessary (since if it is, no guarantee can be made about the address
range of the memory ballooned out), and memory gets allocated from the
reserved range.
4) Upon 64-bit (or 32-bit HVM or HVM) DomU creation, the tools
determine the amount of memory to be ballooned out of Dom0 by adding
the amount needed for the new guest and the amount still in the
reserved pool (and then of course subtracting the total amount of
memory the hypervisor has available for guest use).
Signed-off-by: james song (wei) <jsong@novell.com>
BaseException.message has been deprecated since Python 2.6. To
prevent DeprecationWarning from popping up over this pre-existing
attribute, use a new property that takes lookup precedence.
Signed-off-by: Wei Kong <weikong.cn@gmail.com>
this is patch to add maxvcpus support to xen xm command. It's using
vcpu_avail bitmask and sets the number of vcpus to maxvcpus if
present. If it's not present, old behavior is preserved.
In domain config file you can define it as follows:
maxvcpus = 4
vcpus = 2
this automatically sets vcpus to 4 and corresponding bitmask to
present 2 vcpus in the guest with option to increase it up to 4
vcpus. If maxvcpus is not present, the old behavior for vcpus is
preserved, ie. you can set vcpus to some number of vcpus to be used
and the vcpu_avail is set appropriately to use all of them. Only when
you use maxvcpus and vcpus new vcpu_avail value is calculated to show
PV guest the desired number of vcpus only.
It's been tested using RHEL-5 32-bit PV guest with maxvcpus = 4 and
vcpus = 2 and also the previous setup of vcpus = 2 only... In both
cases I was able to use 'xm vcpu-set {domainId} {numberOfVCPUs}' to
increase move vcpu count from 0 to maxvcpus/vcpus so it was working as
designed.
Signed-off-By: Michal Novotny<minovotn@redhat.com>
(NOTE: pvrdtscp mode not finished yet, but all other
modes have been tested so sooner seemed better than
later to submit this fairly major patch so we can get
more mileage on it before next release.)
New tsc_mode config option supercedes tsc_native and
offers a more intelligent default and an additional
option for intelligent apps running on PV domains
("pvrdtscp").
For PV domains, default mode will determine if the initial
host has a "safe"** TSC (meaning it is always synchronized
across all physical CPUs). If so, all domains will
execute all rdtsc instructions natively; if not,
all domains will emulate all rdtsc instructions but
providing the TSC hertz rate of the initial machine.
After being restored or live-migrated, all PV domains will
emulate all rdtsc instructions. Hence, this default mode
guarantees correctness while providing native performance
in most conditions.
For PV domains, tsc_mode==1 will always emulate rdtsc
and tsc_mode==2 will never emulate rdtsc. For tsc_mode==3,
rdtsc will never be emulated, but information is provided
through pvcpuid instructions and rdtscp instructions
so that an app can obtain "safe" pvclock-like TSC information
across save/restore and live migration. (Will be completed in
a follow-on patch.)
For HVM domains, the default mode and "always emulate"
mode do the same as tsc_native==0; the other two modes
do the same as tsc_native==1. (HVM domains since 3.4
have implemented a tsc_mode=default-like functionality,
but also can preserve native TSC across save/restore
and live-migration IFF the initial and target machines
have a common TSC cycle rate.)
** All newer AMD machines, and Nehalem and future Intel
machines have "Invariant TSC"; many newer Intel machines
have "Constant TSC" and do not support deep-C sleep states;
these and all single-processor machines are "safe".
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
This patch adds support for XCP Windows paravirtual drivers to run on
Xen. The drivers are currently provided in binary-only format from
Citrix. At a minimum, this patch is useful for performance comparisons
vs GPLPV drivers.
Live migration and save/resume are functional but set the guest clock
to the 1970's. The clock must be manually adjusted for the guest's ntp
to resume accurate timekeeping.
Before rebooting windows at the end of driver installation create the
registry key
HKLM\System\CurrentControlSet\Services\xenevtchn\Parameters. Add to it
a DWORD called SetFlags with a value of 0x10000000.
Signed-off-by: Keith Coleman <keith@scaltro.com>
This patch fixes the following warning:
xen/lowlevel/checkpoint/libcheckpoint.c: In function
`delete_suspend_timer':
xen/lowlevel/checkpoint/libcheckpoint.c:352: warning: assignment
makes integer from pointer without a cast
Signed-off-by: KUWAMURA Shin'ya <kuwa@jp.fujitsu.com>
with PCI pass-through to succesfully launch.
If the user hasn't used dom0_mem=3D bootup parameter, the privileged
domain usurps all of the memory. During launch of PV guests with PCI
pass-through we ratchet down the memory for the privileged domain to
the required memory for the PV guest. However, for PV guests with PCI
pass-through we do not take into account that the PV guest is going to
swap its SWIOTLB memory for DMA32 memory - in fact, swap 64MB of
it. This patch balloon's down the privileged domain so that there are
64MB of DMA32 memory available.
From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
this patch fixes a couple of issues with pci passthrough in xend,
previously reported by Cui Dexuan.
The main problem is that xc_assign_device is called only for the first
device hotplugged into the guest and not the followings.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Alphabetize object files and guest config options for better
readability. Also remove svm interrupt prototypes which do not
exist.
Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>
XenAPI (not xapi) has supported only LUN assignment mode for pvSCSI.
But at last, HOST assignment mode also is supported by these patches.
To support HOST assignment mode, these patches add PSCSI_HBA class
and DSCSI_HBA class to XenAPI.
Signed-off-by: Masaki Kanno <kanno.masaki@jp.fujitsu.com>
Blktap2 port of remus disk driver. Backwards compatable with blktap1
implementation.
Signed-off-by: Ryan O'Connor <rjo@cs.ubc.ca>
Signed-off-by: Brendan Cully <brendan@cs.ubc.ca>
The tail containing the final PFN table, VCPU contexts and
shared_info_page is buffered, then the read loop is restarted.
After the first pass, incoming pages are buffered until the next tail
is read, completing a new consistent checkpoint. At this point, the
memory changes are applied and the loop begins again. When the fd read
fails, the tail buffer is processed.
Signed-off-by: Brendan Cully <brendan@cs.ubc.ca>
This patch fixes the recent regressions pointed out by Dexuan, keeping
pci passthrough working with stubdom too. In particular calling
device_create when pci_state == 'Initialising' is a mistake because
the state is always Initialising when attaching a device while
device_create has too be called only when the pci backend is missing.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
The pause and unpause paths are currently broken due to a missing
slash. I took advantage of the opportunity to remove code repetition,
repeated strings that should point to the proper constants, etc
From: Andres Lagar Cavilla <andreslc@cs.toronto.edu>
Signed-off-by: Keir Fraser <keir.fraser@citrix.com>
This patch exposes the getenforce and setenforce functionality for the
Flask XSM module.
Signed-off-by : Machon Gregory <mbgrego@tycho.ncsc.mil>
Signed-off-by : George S. Coker, II <gscoker@alpha.ncsc.mil>
This patch adds securty checks for pci passthrough related hypercalls
to enforce that the current domain owns the resources that it is about
to remap. It also adds a call to xc_assign_device to xend and removes
the PRIVILEGED_STUBDOMS flags.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
1. Calling VDB.set_bootable(True) results in string 'True' in managed
config file. After xend restart, conversion int(bootable) in
server/blkif.py fails.
2. selection of bootable disks in XendDomainInfo.py requires
type(bootable) == int not str, otherwise all disks are taken as
bootable.
This patch converts the bootable flag always to int.
Signed-off-by: Lutz Dube <Lutz.Dube@ts.fujitsu.com>
This patch fixes the circular dependency problem in the toolstack that
prevented pci coldplug from working with stubdoms: after creating the
stubdom we wait for it to be properly initialized before going
further. We release the domain lock while we wait.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
The new nomigrate option can be set to non-zero in vm.cfg
(for both hvm and pvm) to disallow a guest from being
migrated or restored. (Save is still allowed for the purpose
of checkpointing.) The option persists into a save file
and is also communicated into the hypervisor, the latter
for the purposes of a to-be-added hypercall for communicating
to guests that migration is disallowed (which will be
used initially for userland TSC-related sensing, but may
find other uses).
Signed-off-by: Dan Magenheimer <dan.magenheimer@oracle.com>
We can destroy a VDI by VDI.destroy even if the VDI is being used
to VBDs. This patch checks that the VDI is not used to VBDs.
Signed-off-by: Masaki Kanno <kanno.masaki@jp.fujitsu.com>
When the option pci-passthrough-strict-check of
/etc/xen/xend-config.sxp is set to 'no', we don't check the
non-page-aligned MMIO BAR. This could be useful in some cases, e.g.,
when there is only 1 device in the range of the page and we try to
assign the device to pv guest.
Signed-off-by: Dexuan Cui <dexuan.cui@intel.com>
Add a new option "description=" to each VM to increase the
manageability of VM, which could be accessed via "xm list -l
MACHINE".e.g add "description='(name, james),(priority 5), (owner
james.song@company.com)'" to configure file, User can get the VM's
attribute easily by "xm list -l Machine" or some tools.
Signed-off-by: James Song<jsong@novell.com>
Keir Fraser