Add a new domctl API to initialize vpl011. It takes the GFN and console
backend domid as input and returns an event channel to be used for
sending and receiving events from Xen.
Xen will communicate with xenconsole using GFN as the ring buffer and
the event channel to transmit and receive pl011 data on the guest domain's
behalf.
Signed-off-by: Bhupinder Thakur <bhupinder.thakur@linaro.org>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Acked-by: Wei Liu <wei.liu2@citrix.com>
If case of a vm_event with the emulate_flags set, if the instruction
is not implemented by the emulator, the monitor should be notified instead
of directly injecting a hw exception.
This behavior can be used to re-execute an instruction not supported by
the emulator using the real processor (e.g. altp2m) instead of just
crashing.
Signed-off-by: Petre Pircalabu <ppircalabu@bitdefender.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Add a new libxc function xc_domain_set_gnttbl_limits() setting the
limits for the maximum numbers of grant table frames and maptrack
frames of a domain.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
This Patch allows a migration precopy policy to be specified.
The precopy phase of the xc_domain_save() live migration algorithm has
historically been implemented to run until either a) (almost) no pages
are dirty or b) some fixed, hard-coded maximum number of precopy
iterations has been exceeded. This policy and its implementation are
less than ideal for a few reasons:
- the logic of the policy is intertwined with the control flow of the
mechanism of the precopy stage
- it can't take into account facts external to the immediate
migration context, such external state transfer state, interactive
user input, or the passage of wall-clock time.
- it does not permit the user to change their mind, over time, about
what to do at the end of the precopy (they get an unconditional
transition into the stop-and-copy phase of the migration)
To permit callers to implement arbitrary higher-level policies governing
when the live migration precopy phase should end, and what should be
done next:
- add a precopy_policy() callback to the xc_domain_save() user-supplied
callbacks
- during the precopy phase of live migrations, consult this policy after
each batch of pages transmitted and take the dictated action, which
may be to a) abort the migration entirely, b) continue with the
precopy, or c) proceed to the stop-and-copy phase.
- provide an implementation of the old policy, used when
precopy_policy callback is not provided.
Signed-off-by: Jennifer Herbert <Jennifer.Herbert@citrix.com>
Signed-off-by: Joshua Otto <jtotto@uwaterloo.ca>
Reviewed-by: Paul Durrant <paul.durrant@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
DEPS_INCLUDE is currently the same as DEPS, so no functional change.
This patch is the result of this perl rune:
git-grep -l 'include.*DEPS' | xargs perl -i -pe 'next unless m/^-?include/; s/\bDEPS\b/DEPS_INCLUDE/'
I have verified that I haven't missed anything, with this rune:
git-grep '\bDEPS\b'
Reported-by: Jan Beulich <JBeulich@suse.com>
CC: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
DEPS_RM is currently the same as DEPS, so no functional change.
This patch is the result of two perl runes:
git-grep -l 'rm.*DEPS' | xargs perl -i~ -pe 'next unless m/^\t+rm\b/; s/\bDEPS\b/DEPS_RM/;'
git-grep -l 'RM.*DEPS' | xargs perl -i~ -pe 'next unless m/^\t+\$\(RM\)/; s/\bDEPS\b/DEPS_RM/;'
And editing tools/xenstat/libxenstat/Makefile by hand.
I verified that I didn't miss anything with this rune:
git-grep '\bDEPS\b' | grep -v include |less
Reported-by: Jan Beulich <JBeulich@suse.com>
CC: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Ian Jackson <Ian.Jackson@eu.citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
The returned value represents now units of bytes instead of longs.
Fixes commit 11d0044a16 ("tools/libxc: Modify bitmap operations to
take void pointers").
Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Today the maximum record lenth in a migration stream is 8MB. This
limits the size of a PV domain to a little bit less than 1TB in the
migration case, as the P2M frame list will exceed 8MB in this case.
Raising the record size limit by a factor of 16 allows for domain
sizes of nearly 16TB to be migrated. This ought to be enough.
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Ian Jackson <ian.jackson@eu.citrix.com>
In some introspection usecases, an in-guest agent needs to communicate
with the external introspection agent. An existing mechanism is
HVMOP_guest_request_vm_event, but this is restricted to kernel usecases
like all other hypercalls.
Introduce a mechanism whereby the introspection agent can whitelist the
use of HVMOP_guest_request_vm_event directly from userspace.
Signed-off-by: Alexandru Isaila <aisaila@bitdefender.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
Add a new libxc function to set hypervisor parameters at runtime
similar to boot time parameters via command line.
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
In some introspection usecases, an in-guest agent needs to communicate
with the external introspection agent. An existing mechanism is
HVMOP_guest_request_vm_event, but this is restricted to kernel usecases
like all other hypercalls.
Introduce a mechanism whereby the introspection agent can whitelist the
use of HVMOP_guest_request_vm_event directly from userspace.
Signed-off-by: Alexandru Isaila <aisaila@bitdefender.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
The variable domctl.u.address_size.size may remain uninitialized if
guest_type is not one of xen-3.0-aarch64 or xen-3.0-armv7l. And the
code precisely checks if this variable is still 0 to decide if the
guest type is supported or not.
This fixes the following build failure with gcc 7.x:
xc_dom_arm.c:229:31: error: 'domctl.u.address_size.size' may be used uninitialized in this function [-Werror=maybe-uninitialized]
if ( domctl.u.address_size.size == 0 )
Patch originally taken from
https://www.mail-archive.com/xen-devel@lists.xen.org/msg109313.html.
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
When the record length for sending the p2m frames in a migration
stream is too large, the issued error message is not very helpful:
xc: Record (0x00000003, x86 PV P2M frames) length 0x8 exceeds max
(0x800000): Internal error
When printing the error use the size which was tested instead that of
the record header length.
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
This patch implements the xl/xc changes to support set CBM
for L2 CAT.
The new level option is introduced to original CAT setting
command in order to set CBM for specified level CAT.
- 'xl psr-cat-set' is updated to set cache capacity bitmasks(CBM)
for a domain according to input cache level.
root@:~$ xl psr-cat-set -l2 1 0x7f
root@:~$ xl psr-cat-show -l2 1
Socket ID : 0
Default CBM : 0xff
ID NAME CBM
1 ubuntu14 0x7f
Signed-off-by: He Chen <he.chen@linux.intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
This patch implements changes in xl/xc changes to support
showing CBM of L2 CAT.
The new level option is introduced to original CAT showing
command in order to show CBM for specified level CAT.
- 'xl psr-cat-show' is updated to show CBM of a domain
according to input cache level.
Examples:
root@:~$ xl psr-cat-show -l2 1
Socket ID : 0
Default CBM : 0xff
ID NAME CBM
1 ubuntu14 0x7f
Signed-off-by: He Chen <he.chen@linux.intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
This patch implements xl/xc changes to support get HW info
for L2 CAT.
'xl psr-hwinfo' is updated to show both L3 CAT and L2 CAT
info.
Example(on machine which only supports L2 CAT):
Cache Monitoring Technology (CMT):
Enabled : 0
Cache Allocation Technology (CAT): L2
Socket ID : 0
Maximum COS : 3
CBM length : 8
Default CBM : 0xff
Signed-off-by: He Chen <he.chen@linux.intel.com>
Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Running "make uninstall" does not remove all installed files, a
situation which might cause link related issues if xen is re-installed
in a different location.
In order to make uninstall correctly remove the files it is best
the process should be done recursively by mirroring each "install"
target with an "uninstall" who removes the installed files.
An exception to this rule is uninstalling the files produced by
"qemu-xen-dir-remote" and "qemu-xen-traditional-dir", which are external
to the project. These projects do not implement an "uninstall" target so
the files have to be removed manually.
Signed-off-by: Petre Pircalabu <ppircalabu@bitdefender.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
The original code was added with the hope that PV superpage migration
might work. But it was never proven that the code actually worked.
Now that PV superpage is gone, simplify the code by returning error
immediately.
Suggested-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
There are no current users which I can locate. One piece of xend which didn't
move forwards into xl/libxl is this:
# Configure host CPUID consistency checks, which must be satisfied for this
# VM to be allowed to run on this host's processor type:
#cpuid_check=[ '1:ecx=xxxxxxxxxxxxxxxxxxxxxxxxxx1xxxxx' ]
# - Host must have VMX feature flag set
The implementation of xc_cpuid_check() is conceptually broken. Dom0's view of
CPUID is not the approprite view to check, and will be wrong in the presence
of CPUID masking/faulting, and for HVM-based toolstack domains.
If it turns out that the functionality is required, it should be implemented
in terms of XEN_SYSCTL_get_cpuid_policy to use the proper CPUID view.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Though XEN_MC_inject_v2 allows injecting MC# to specified CPUs, the
current xc_mca_op() does not use this feature and not provide an
interface to callers. This commit add a new xc_mca_op_inject_v2() that
receives a cpumap providing the set of target CPUs.
Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
If LMCE is supported by host and ' mca_caps = [ "lmce" ] ' is present
in xl config, the LMCE capability will be exposed in guest MSR_IA32_MCG_CAP.
By default, LMCE is not exposed to guest so as to keep the backwards migration
compatibility.
Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com> for hypervisor side
Acked-by: Wei Liu <wei.liu2@citrix.com>
This patch adds new interface for GNTTABOP_query_size in libxc to help
query the current grant table frames and maximum grant table frames for a
specific domain.
Signed-off-by: Dongli Zhang <dongli.zhang@oracle.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Add support for filtering out the write_ctrlreg monitor events if they
are generated only by changing certains bits.
A new parameter (bitmask) was added to the xc_monitor_write_ctrlreg
function in order to mask the event generation if the changed bits are
set.
Signed-off-by: Petre Pircalabu <ppircalabu@bitdefender.com>
Acked-by: Tamas K Lengyel <tamas@tklengyel.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Have the caller indicate its buffer size, provide a means to query the
needed size, don't ignore the upper halves of type code and instance,
and don't copy partial data.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Avoid needless gaps. Make flags field mandatory for all three
operations (and rename it to fit the intended future purpose of
possibly holding more than just one flag).
Also correct a typo in a related domctl.h comment.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Julien Grall <julien.grall@arm.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
xc_{get,set}_hvm_param() are deprecated because they truncate their value
parameter in 32bit builds of libxc, and are therefore unfit for use.
As there is only a single remaining user, switch that user over to
xc_hvm_param_get() and drop these functions completely.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
The code as written attempted to elide zero-content records, as such records
serve no purpose but come with a performance hit. Unfortunately, in the case
where the hypervisor reported max size is non-zero, but the actual size is
zero, the record is not elided.
This previously tripped up the sanity checks in the restore side of migration,
but as the underlying reasons for eliding the records in the first place are
still valid, fix the elision logic.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
The migration v2 save code was written to avoid sending data records with no
content, as such records serve no purpose but come with a performance hit.
The restore code sanity checks this expectation.
Under some circumstances (most notably, on AMD hardware with Debug Extensions,
and a PV guest kernel which is not using the feature), the save code would
generate a record with no content, which trips the sanity check in the restore
code.
As the stream is otherwise fine, tolerate these records and avoid failing the
migration.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Wei Liu <wei.liu2@citrix.com>
Currently xc_translate_foreign_address() only checks for the PSE bit on
level 2 entries (that's 2 MB pages on x64 and 32-bit with PAE, and 4 MB
pages on 32-bit). But the Linux kernel sometimes uses 1 GB pages. This
patch fixes that, by checking the PSE bit on level 3 entries if the guest
has 4 translation levels (that means 64-bit guests only).
Signed-off-by: Cristian-Bogdan Sirb <csirb@bitdefender.com>
Signed-off-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Release-acked-by: Julien Grall <julien.grall@arm.com>
A simple
xl tmem-shared-auth -u 00000000-0000-000A-0000-000000000001 -A 0 0
resulted in uuid_low = 1 (correct) and uuid_high = 0 (umm?).
The issue was that for hex values above 'A' (or 'a') we forgot
to add 10.
Acked-by: Wei Liu <wei.liu2@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
which surprisingly (or maybe not) looks like
XEN_SYSCTL_TMEM_OP_SET_POOLS.
This hypercall came about, as explained in docs/misc/tmem-internals.html:
When tmem was first proposed to the linux kernel mailing list
(LKML), there was concern expressed about security of shared ephemeral
pools. The initial tmem implementation only
required a client to provide a 128-bit UUID to identify a shared pool, and the
linux-side tmem implementation obtained this UUID from the superblock of the
shared filesystem (in ocfs2). It was
pointed out on LKML that the UUID was essentially a security key and any
malicious domain that guessed it would have access to any data from the shared
filesystem that found its way into tmem.
..
As a result, a Xen boot option -- tmem_shared_auth; -- was
added. The option defaults to disabled,
but when it is enabled, management tools must explicitly authenticate (or may
explicitly deny) shared pool access to any client.
On Xen, this is done with the xm tmem-shared-auth command.
"
However the implementation has some rather large holes:
a) The hypercall was accessed from any guest.
b) If the ->domain id value is 0xFFFF then one can toggle the
tmem_global.shared_auth knob on/off. That with a)
made it pretty bad.
c) If one toggles the tmem_global.shared_auth off, then the
'tmem_shared_auth=1' bootup parameter is ignored and
one can join any shared pool (if UUID is known)!
d) If the 'tmem_shared_auth=1' and tmem_global.shared_auth is
set to 1, then one can only join an shared pool if the
UUID has been set by 'xl tmem-shared-auth'. Otherwise
the joining of a pool fails and a non-shared pool is
created (without errors to guest). Not exactly sure if
the shared pool creation at that point should error out
or not.
e) If a guest is migrated, the policy values (which UUID
can be shared, whether tmem_global.shared_auth is set, etc)
are completely ignored.
This patch only fixes a) and only allows the hypercall to
be called by the control domain. Subsequent patches will
fix the remaining issues.
We also have to call client_create as the guest at this
point may not have done any tmem hypercalls - and hence
the '->tmem' from 'struct domain' is still NULL. Us calling
client_create fixes this.
Acked-by: Wei Liu <wei.liu2@citrix.com> [libxc changes]
Reviewed-by: Jan Beulich <jbeulich@suse.com> [hypervisor changes]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
This used to be done under TMEM_RESTORE_NEW which was an hypercall
accessible by the guest. However there are couple of reasons
not to do it:
- No checking of domid on TMEM_RESTORE_NEW which meant that
any guest could create TMEM pools for other guests.
- The guest can already create pools using TMEM_NEW_POOL
(which is limited to guest doing the hypercall)
- This functionality is only needed during migration - there
is no need for the guest to have this functionality.
However to move this we also have to allocate the 'struct domain'
->tmem pointer. It is by default set to NULL and would be initialized
via the guest do_tmem() hypercalls. Presumarily that was the
initial reason that TMEM_RESTORE_NEW was in the guest accessible
hypercalls.
Acked-by: Wei Liu <wei.liu2@citrix.com> [libxc change]
Reviewed-by: Jan Beulich <jbeulich@suse.com> [hypervisor changes]
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Currently in xc_interface_open, xch->fmem is not initialized
and in some rare case the code fails before ever assigning a value
to it.
I got this in master:
$ sudo ./xl/xl run
xencall: error: Could not obtain handle on privileged command interface: No such file or directory
Segmentation fault
This initializes the whole xch_buff to 0.
Signed-off-by: Seraphime Kirkovski <kirkseraph@gmail.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
colo_merge_secondary_dirty_bitmap() unconditionally free()s the .data
member of its local xc_sr_record structure rec on its exit path.
However, if the initial call to read_record() fails then this member is
uninitialised. Initialise it.
Signed-off-by: Joshua Otto <jtotto@uwaterloo.ca>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
c/s 4045953 "x86/paging: Enforce PG_external == PG_translate == PG_refcounts"
in the hypervisor finally prevented the construction of PV autotranslate
guests.
Remove support for such guests in the domain builder, bailing out with an
obvious "no longer supported" message, rather than a more obscure
"SHADOW_OP_ENABLED failed".
As a piece of cleanup, rename xc_dom_feature_translated() to
xc_dom_translated() to match its actual semantics.
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
libgnttab contains the complete gntshr support, but the tools build
infrastructure contains dedicated support for gntshr _and_ gnttab.
Remove the gntshr specific flags and switch their users to gnttab
instead.
Signed-off-by: Juergen Gross <jgross@suse.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
The previous "tools/libxc: Exposed XEN_DOMCTL_getvcpuextstate" broke
the ARM build (the hypercall does not have a corresponding DOMCTL
ARM struct). This patch fixes the build by returning -ENODEV for
ARM from xc_vcpu_get_extstate().
Signed-off-by: Razvan Cojocaru <rcojocaru@bitdefender.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
Bhupinder Thakur
Petre Pircalabu
Juergen Gross
Jennifer Herbert
Jan Beulich
Ian Jackson
Olaf Hering
Alexandru Isaila
Bernd Kuhls
Wei Liu
Yi Sun
Andrew Cooper
Haozhong Zhang
Dongli Zhang
Zhongze Liu
Roger Pau Monné
Adrian Pop
Cristian-Bogdan Sirb
Konrad Rzeszutek Wilk
Seraphime Kirkovski
Joshua Otto
Razvan Cojocaru