NMI watchdog sets APIC_LVTPC register to generate an NMI when PMU counter
overflow occurs. This may be overwritten by VPMU code later, effectively
turning off the watchdog.
We should disable VPMU when NMI watchdog is running.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Usage:
spice_streaming_video=[filter|all|off]
Specifies what streaming video setting is to be used by spice (if
given),
otherwise the qemu default will be used.
Signed-off-by: Fabio Fantoni <fabio.fantoni@m2r.biz>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Usage:
spice_image_compression=[auto_glz|auto_lz|quic|glz|lz|off]
Specifies what image compression is to be used by spice (if given),
otherwise the qemu default will be used.
Signed-off-by: Fabio Fantoni <fabio.fantoni@m2r.biz>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Prevent Dom0 from accessing HPET MMIO region by adding the HPET mfn to the
list of forbiden memory regions (if ACPI_HPET_PAGE_PROTECT4 or
ACPI_HPET_PAGE_PROTECT64 flag is set) or to the list of read-only regions.
Also provide an option that prevents adding the HPET to the read-only memory
regions called ro-hpet, in case there are systems that put other stuff in
the HPET page.
Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Don't loop over iomem_deny_access() for consecutive MFNs.
Put new command line option's doc entry in right spot.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
',' is a valid character in a device-tree path (see ePAPR v1.1 Table
2-1), in fact ',' is actually pretty common in node names.
Using ',' as a separator breaks for example on fast models. If you use
the full path (/smb/motherboard/iofpga@3,00000000/uart@090000) rather
than the alias then earlyprintk gives:
(XEN) Looking for UART console /smb/motherboard/iofpga@3
(XEN) Unable to find device "/smb/motherboard/iofpga@3"
(XEN) Bad console= option 'dtuart'
I actually noticed this on Jetson where the uart is
"/serial@0,70006300" and there happened to be no alias defined.
Instead use ':' as the separator, it is defined to terminate the path
in the context of /chosen/stdout-path (Table 3-4) which is pretty
closely analogous to the dtuart= option and so makes a pretty good
choice (especially since the next patch adds support for stdout-path).
Since no DT aware driver current supports any options there is no
point in retaining support for ',' for backwards compatibility.
Additionally, expand the buffer for the dtuart option, a path can be
far longer than 30 characters (in fact the maximum size of a single
node name is 31, so it's not even necessarily enough for an alias).
128 is completely arbitrary and allows for paths at least 8 deep even
with worst case node names.
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Reviewed-by: Julien Grall <julien.grall@linaro.org>
We've had reports of systems where CMCIs would surface at a relatively
high rate during certain periods of time, without them apparently
causing subsequent more severe problems (see Xeon E7-8800/4800/2800
specification clarification SC1). Give the admin a knob to lower the
impact on the system logs.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Christoph Egger <chegger@amazon.de>
Acked-by: Liu Jinsong <jinsong.liu@alibaba-inc.com>
The presence of the partition reference time enlightenment persuades newer
versions of Windows to prefer the TSC as their primary time source. Hence,
if rdtsc is not being emulated and is invariant then many vmexits (for
alternative time sources such as the HPET or reference counter MSR) can
be avoided.
The implementation is not yet complete as no attempt is made to prevent
emulation of rdtsc if the enlightenment is active and guest and host
TSC frequencies differ. To do that requires invasive changes in the core
x86 time code and hence a lot more testing.
This patch avoids the issue by disabling the enlightenment if rdtsc is
being emulated, causing Windows to choose another time source. This is
safe, but may cause a big variation in performance of guests migrated
between hosts of differing TSC frequency. Thus the enlightenment is not
enabled in the default set, but may be enabled to improve guest performance
where such migrations are not a concern.
See section 15.4 of the Microsoft Hypervisor Top Level Functional
Specification v4.0a for details.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Reviewed-by: Christoph Egger <chegger@amazon.de>
Various configure scripts have the Xen version built into them by
autoconf. Rereun autogen.sh (on Debian wheezy) so that they all say
4.6. There are no changes other than to doc comments, usage messages,
and so forth.
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
`font` had a trailing single quote which was out of place.
`gnttab_max_frames` was missing escapes for the underscores which caused the
underscores to take their markdown meaning, causing 'max' in the middle to be
italicised. Escape the underscores, and make all command line parameters
bold, to be consistent with the existing style.
Clarify how the default for `nmi` changes between debug and non debug builds
of Xen.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
CC: Ian Campbell <Ian.Campbell@citrix.com>
CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
The current value of nr_static_irqs + 256 is often too small for larger
systems. Make it dependent on CPU count and number of IO-APIC pins on
x86, and (until it obtains PCI support) simply NR_IRQS on ARM.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: David Vrabel <david.vrabel@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Release-Acked-by: Konrad Rzeszutek Wilk <Konrad.wilk@oracle.com>
Currently the quirk code for SandyBridge uses the VTd timeout value when
writing to an IGD register. This is the wrong timeout to use and, at
1000 msec., is also much too large. This patch changes the quirk code
to use a timeout that is specific to the IGD device and allows the user
control of the timeout.
Boolean settings for the boot parameter `snb_igd_quirk' keep their current
meaning, enabling or disabling the quirk code with a timeout of 1000 msec.
In addition specifying `snb_igd_quirk=default' will enable the code and
set the timeout to the theoretical maximum of 670 msec. For finer control,
specifying `snb_igd_quirk=n', where `n' is a decimal number, will enable
the code and set the timeout to `n' msec.
Signed-off-by: Don Dugger <donald.d.dugger@intel.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>
Update documentation.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
* Add options whose code has been committed (without a patch to this file).
* Remove options which have been deleted (without a patch to this file).
* Tweak some formatting for consistency.
* Nuke some trailing whitespace.
I believe this document now identifies the exact set of command line options
accepted by Xen, for both x86 and ARM architectures.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
For 'dom0_max_vcpus' and 'hvm_debug', markdown was interpreting the text as
regular text, and reflowing it as a regular paragraph, leading to a single
line as output. Reformat them as code blocks inside blockquote blocks, which
causes them to take their precise whitespace layout.
For 'psr', the bullet point was incorrectly delineated from paragraph text,
causing it to be reflowed. Alter the formatting to include the CMT-specific
options as sub-bullets of the overall CMT resource.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Ian Campbell <Ian.Campbell@citrix.com>
Release-acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
CC: Ian Jackson <Ian.Jackson@eu.citrix.com>
CC: Wei Liu <wei.liu2@citrix.com>
Some versions of markdown (specifically the one in Debian Wheezy, currently
used to generate
http://xenbits.xen.org/docs/unstable/misc/xen-command-line.html) seem to be
confused by nested lists in the middle of multi-paragraph parent list entries
as seen in the com1,com2 entry.
The effect is that the "Default" section of all following entries are replace
by some sort of hash or checksum (at least, a string of 32 random seeming hex
digits).
Workaround this issue by making the decriptions of the DPS options a nested
list, moving the existing nested list describing the options for S into a third
level list. This seems to avoid the issue, and is arguably better formatting in
its own right (at least its not a regression IMHO)
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Update EFI code to completely ignore the EFI comnandline when booted from GRUB.
Previusly it was parsed of EFI boot specific options, but these aren't used
when booted from GRUB.
Don't do EFI console or video configuration when booted by GRUB. The EFI boot
code does some console and video initialization to support native EFI boot from
the EFI boot manager or EFI shell. This initlization should not be done when
booted using GRUB.
Update EFI documentation to indicate that it describes EFI native boot, and
does not apply at all when Xen is booted using GRUB.
Signed-off-by: Roy Franz <roy.franz@linaro.org>
On certain systems some of the memory map entries designated for use by
runtime services cannot be mapped (frequently due to firmware bugs). On
others, some of the memory map entries aren't even marked for runtime
services use, yet are being used by them. For both cases give people a
way to suppress use of runtime services altogether.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
If you add enough PCI devices then all mmio may not fit below 4G
which may not be the layout the user wanted. This allows you to
increase the below 4G address space that PCI devices can use and
therefore in more cases not have any mmio that is above 4G.
There are real PCI cards that do not support mmio over 4G, so if you
want to emulate them precisely, you may also need to increase the
space below 4G for them. There are drivers for these cards that also
do not work if they have their mmio space mapped above 4G.
This allows growing the MMIO hole to the size needed.
This may help with using pci passthru and HVM.
In the tools this is named mmio_hole_memkb.
Signed-off-by: Don Slutz <dslutz@verizon.com>
Acked-by: George Dunlap <george.dunlap@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
[ ijc -- fixed build error in xl_cmdimpl.c with s/%PRIu64/%ld/.
Reworded title ]
Introduce gnttab_max_maptrack_frames: a new Xen command line option to
specify the max number of maptrack frames per domain.
Deprecate the old gnttab_max_nr_frames and introduce gnttab_max_frames
instead, that doesn't affect the maptrack. Keep gnttab_max_nr_frames for
compatibility.
Rename internally max_nr_grant_frames to max_grant_frames to avoid
confusions.
Introduce DEFAULT_MAX_MAPTRACK_FRAMES, that is completely independent
from max_nr_grant_frames.
Remove MAX_MAPTRACK_TO_GRANTS_RATIO that is now only used in one place
for compatibility.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Currently Xen can only read the configuration file if it is in ASCII
format. If it is in CHAR16 or CHAR8 it will choke. One way to verify
this is to use 'file':
xen.cfg: ASCII text
xen-char16.cfg: Little-endian UTF-16 Unicode text, with CRLF, CR line terminators
The latter is no good.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
In order to support pvgrub (or other bootloader) from dom0 chainloading a
pvgrub (or other) from within the domU filesystem we need a standard for where
the stage 1 bootloader should look and what it should expect to find there.
Add a document along those lines.
This is currently x86-specific since it is expected that other new architecures
(including ARM) will either not need to implement this due to the existence of
more generic specifications for that arch (e.g. the ARM VM spec) or will update
this document in due course.
Signed-off-by: Ian Campbell <ijc@hellion.org.uk>
Acked-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Cc: Colin Watson <cjwatson@debian.org>
Cc: 759018@bugs.debian.org
This adds support for channel declarations of the form:
channel = [ "name=...,connection=...[,path=...][,backend=...]" ]
where 'name' is a label to identify the channel to the frontend.
If 'connection = pty' then the channel is connected to a pty in the
backend domain
If 'connection = socket' then the channel is connected to a Unix domain
socket given by 'path = ...' in the backend domain.
This patch also adds the command:
xl channel-list <domain>
which allows the state of channels to be queried. In particular if
'connection=pty' this will show the path of the pty slave device.
Signed-off-by: David Scott <dave.scott@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
A 'channel':
- is a low-bandwidth private communication channel that resembles
a physical serial port.
- is implemented as a PV console with a well-known string name
which is used to hook the channel to the appropriate software
in the guest (i.e. some kind of guest agent).
- has a backend 'connection' which describes what should happen
to the data.
The following 'connection' types are defined:
* PTY: the I/O surfaces as a pty in the backend domain
* SOCKET: a listening Unix domain socket accepts a connection in
the backend domain and proxies
Channels may be listed but don't currently support hotplug/unplug.
Signed-off-by: David Scott <dave.scott@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
The commit 7471879 "tools: CMDs and APIs for Cache Monitoring Technology"
has introduced a new section but forgot to add '=back'. This will result
a build issue with newer podman:
man/xl.pod.1 around line 1443: You forgot a '=back' before '=head1'
or creating a section "POD ERRORS" with older one.
At the same time, capitalize the title of the section to match the coding
style used within the files.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Some cleanups to the documentation-
- Remove unnecessary steps listed to apply ucode using initrd.
- Condense 'Misc notes' section as well
Suggested-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Signed-off-by: Aravind Gopalakrishnan <aravind.gopalakrishnan@amd.com>
Introduced some new xl commands to enable/disable Cache Monitoring
Technology(CMT) feature.
The following two commands is to attach/detach the CMT feature
to/from a certain domain.
$ xl psr-cmt-attach domid
$ xl psr-cmt-detach domid
This command is to display the CMT information, such as L3 cache
occupancy.
$ xl psr-cmt-show cache_occupancy <domid>
Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Hvmloader uses the xenstore ring and then tries to reset it back
to its initial state before booting the guest. Occasionally xenstored
will read the ring while it is being zeroed and conclude it has
been corrupted. This prevents PV drivers from loading in the guest.
This patch updates the xenstore ring protocol definition, enabling
a server to advertise additional features to the guest. One such feature
is defined: the ability to cleanly reset the ring including the
higher-level protocol, like an enhanced RESET_WATCHES for rings.
This patch implements the ring reconnection features in oxenstored
and hvmloader, fixing the bug.
This patch also defines an 'invalid' xenstore packet type and uses this
to poison the ring over a reconnect. This will make diagnosing this
bug much easier in future.
Signed-off-by: David Scott <dave.scott@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Reviewed-by: Jon Ludlam <jonathan.ludlam@citrix.com>
Set CONFIG_LEAF_DIR with configure to give control if needed. The
check for the correct value if the option is not specified is tricky.
Since other packages (such as grub2) started to populate also
/etc/default/ a given system may have both directories.
Use "default" only if /etc/sysconfig does not exist. "sysconfig"
remains the default.
Move the variable from StdGNU.mk to Linux.mk because thats the only
place where it is used.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Wei Liu <wei.liu2@citrix.com>
[ ijc -- ran autogen.sh as requested ]
Detect Cache Monitoring Technology(CMT) feature and enumerate the
resource types, one of which is to monitor the L3 cache occupancy.
Also introduce a Xen command line parameter to control the Platform
Shared Resource such as CMT.
Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com>
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Release-Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This patch introduces documentation notes about AMD container
file formats and where to obtain latest container files from.
Also, We provide a how-to for updating patch level by
concatenating container files along with initrd images.
Misc notes about how Xen handles two containers of same
kind (if/when) they are concatenated together are also included.
Signed-off-by: Aravind Gopalakrishnan <aravind.gopalakrishnan@amd.com>
The arm64 EFI boot support added a new 'dtb' value to the configuration file.
Update the documentation to describe this and how the coniguration file is not
used when GRUB loads the modules. Updates 'ucode' description to indicate that
it is x86 only.
Signed-off-by: Roy Franz <roy.franz@linaro.org>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
This behaves in the same way as Linux. The 64 byte limit is arbitrary but
long enough for practical purposes.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Release-acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Re-structured code.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Disk replication is enabled by default. This patch adds a cmdline
switch to 'xl remus' command to explicitly disable disk replication.
A new boolean field 'diskbuf' is added to the libxl_domain_remus_info
structure to represent this configuration option inside libxl.
Note: Disabling disk replication requires enabling unsafe mode.
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Signed-off-by: Shriram Rajagopalan <rshriram@cs.ubc.ca>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Add two members in libxl_domain_remus_info:
netbuf: whether netbuf is enabled
netbufscript: the path of the script which will be run to setup
and tear down the guest's interface.
Add cmdline switches to 'xl remus' command to enable or disable
network buffering and a domain-specific hotplug script to setup
network buffering.
Add a new config var 'remus.default.netbufscript' to xl.conf, that
allows the user to override the default global script used to
setup network buffering.
Note: Network buffering is enabled by default. Disabling network
buffering requires enabling unsafe mode.
Signed-off-by: Shriram Rajagopalan <rshriram@cs.ubc.ca>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Reviewed-by: Wen Congyang <wency@cn.fujitsu.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
By default, network buffering and disk replication are enabled;
checkpoints are replicated to another standby VM.
This patch allows the user to disable any of these features by
explicitly specifying a 'run in unsafe mode' switch when invoking
the 'xl remus' command. While running Remus in an unsafe mode
makes little sense under normal circumstances, it is useful to be
able to disable one or more features mentioned above for
testing/debugging/profiling purposes.
Unless this option is enabled, it will not be possible to
replicate memory checkpoints to /dev/null (blackhole replication),
disable network buffering or disk replication.
As a starter, the use of blackhole replication now requires that
the unsafe mode be enabled. Subsequent patches will add support
for disabling network buffering and disk replication in a similar
manner.
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Signed-off-by: Shriram Rajagopalan <rshriram@cs.ubc.ca>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This patch adds the machinery required for protecting a guest's
disk state, when the guest disk uses a DRBD disk backend.
This patch comprises of two parts:
1. Hotplug scripts: The block-drbd-probe script is responsible for
performing sanity checks on the state of the DRBD disk before the
checkpointing process begins. This script should be invoked by
libxl for each of the guest's disk devices, when starting Remus.
2. Remus drbd disk device: Implements the interfaces required by the
remus abstract device layer. A note about the implementation:
a) setup() is called for each disk attached to the guest.
During setup():
i) The hotplug script is called to perform the sanity check.
ii) Libxl obtains a handle to the DRBD device (/dev/drbd*) and
and subsequently controls disk checkpoint replication using
this handle in the checkpoint callbacks.
c) The preresume() checkpoint callback is executed asynchronously
using libxl__ev_child_fork(), as it may potentially block for more
than few seconds in case of backup failure.
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Signed-off-by: Shriram Rajagopalan <rshriram@cs.ubc.ca>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This patch adds the machinery required for protecting a guest's
network device state. This patch comprises of two parts:
1. Hotplug scripts: The remus-netbuf-setup script is responsible for
setting up and tearing down the necessary infrastructure required for
network output buffering. This script should be invoked by libxl for
each of the guest's network interfaces, when starting or stopping Remus.
Apart from returning success/failure indication via the usual hotplug
entries in xenstore, this script also writes to xenstore, the name of
the REMUS_IFB device to be used to control the vif's network output.
The script relies on libnl3 command line utilities to perform various
setup/teardown functions. The script is confined to Linux platforms only
since NetBSD does not seem to have libnl3.
2. Remus network device: Implements the interfaces required by the
remus abstract device layer. A note about the implementation:
a) init_subkind_nic() & cleanup_subkind_nic() are called once per Remus
invocation. They establish and free netlink related state respectively.
b) setup() and teardown are called for each vif attached to the
guest.
During setup():
i) The hotplug script is called to setup a network buffer on a
given vif. The script chooses an available IFB device from
the system, redirects vif egress traffic to the IFB device
and sets up the plug qdisc (output buffer) on the IFB device.
The name of the IFB device is communicated via xenstore to
libxl.
ii) Libxl obtains a handle to the plug qdisc using the libnl3 API
and subsequently controls output buffering using this handle
in the checkpoint callbacks.
During teardown(), the hotplug scripts are called again to remove
the vif->ifb traffic redirection, release the ifb and the plug
qdisc associated with it.
c) The checkpoint callbacks [postsuspend(), preresume() and commit()]
are implemented as synchronous ops as the netlink calls associated
with the qdisc subsystem are very fast.
Signed-off-by: Shriram Rajagopalan <rshriram@cs.ubc.ca>
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Libnl3 is required for controlling Remus network buffering.
This patch adds dependency on libnl3 (>= 3.2.8) to autoconf scripts.
It also provides the ability to configure tools without libnl3 support
i.e., without network buffering support.
When there is no network buffering support, libxl__netbuffer_enabled()
returns 0, otherwise returns 1. The callers of this api will be
introduced in the rest of the series.
NOTE: This patch changes tools/configure.ac, please rerun
autogen.sh while applying the patch.
Signed-off-by: Shriram Rajagopalan <rshriram@cs.ubc.ca>
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>
Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com>
Reviewed-by: Wen Congyang <wency@cn.fujitsu.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Analysis of XSAs 105 and 106 show that is possible to force a race condition
which causes any arbitrary instruction to be emulated.
To aid testing, explicitly introduce the Forced Emulation Prefix for debug
builds alone.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
This patch optionally re-instates support for the partition time reference
counter that was previously introduced by commit
e36cd2cdc9 and reverted by commit
1cd4fab14c. The previous implementation was
non-optional and flawed.
This implementation uses the tsc of vcpu0, which is preserved across
save/restore as part of the architectural state, and then converts that
to a 100ns tick using the domain's tsc_khz.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Cc: Keir Fraser <keir@xen.org>
Acked-by: Jan Beulich <jbeulich@suse.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: Christoph Egger <chegger@amazon.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
The following commits introduced the time reference counter MSR and
TSC/APIC frequency MSRs into the viridian feature set respectively:
e36cd2cdc984657efd91
The time reference counter MSR feature was then reverted by commit
1cd4fab14c
because a flaw in the implementation meant the counter was reset on
migration.
All of these changes were made without any addtional options being
added to the VM configuration, or any compatibility checks being made
in the domain save/restore code. Hence setting the single boolean
'viridian' option in the VM configuration yields a different set of
features depending on which version of Xen the VM is started on, and the
feature set can change across migration (so new MSRs can magically appear).
This patch grandfathers in the current viridian features set and calls them
the 'base' and 'freq' feature sets. HVM_PARAM_VIRIDIAN is re-purposed as
a feature mask. The hypervisor has only ever allowed it ot be set to 0
or 1, so the presence of the base and freq sets are indicated by setting
bit 0. The freq set can then be turned off by setting bit 1, thus
restoring the pre-Xen-4.4 base set. Newly implemented viridian features
can be optionally enabled in future by setting further bits.
The viridian option in xl.cfg(5) has also been changed to a list so
that the sets can be individually enabled or disabled. For compatibility,
if the option is specified as a boolean, then a true (1) value will enable
the base and freq sets and a false (0) value will not enable any
enlightenments.
This patch also alters the allowed write accesses to HVM_PARAM_VIRIDIAN.
Currently there is nothing to stop the guest writing this value (which,
while harmless to anything else, should not happen) and nothing to
stop a toolstack from setting the value back to zero whilst the guest is
running, causing CPUID leaves to disappear and MSR accesses to start
causing GPFs in the guest. Both of these possibilities are now disallowed:
Once the parameter is set to a non-zero value it may not be modified (only
re-written with the same value), and guests no longer have any write
access.
Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
Cc: Keir Fraser <keir@xen.org>
Acked-by: Jan Beulich <jbeulich@suse.com>
Cc: Ian Campbell <ian.campbell@citrix.com>
Cc: Ian Jackson <ian.jackson@eu.citrix.com>
Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Cc: David Scott <dave.scott@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
/var/run is a runtime directory. It is not supposed to be packaged.
Remove unused SUBSYS_DIR variable from Config.mk and distro_mapping.txt.
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Boris Ostrovsky
Andrew Cooper
Quan Xu
Fabio Fantoni
Roger Pau Monné
Ian Campbell
Jan Beulich
Paul Durrant
Ian Jackson
Don Dugger
Roy Franz
Don Slutz
Stefano Stabellini
Konrad Rzeszutek Wilk
Ian Campbell
David Scott
Julien Grall
Aravind Gopalakrishnan
Chao Peng
Olaf Hering
Dongxiao Xu
Suravee Suthikulpanit
Frediano Ziglio
Jon Fraser
Wei Liu
Yang Hongyang
Meng Xu