Commit Graph
15179 Commits
Author SHA1 Message Date
Bertrand Marquis 32cbc7f96f tools: Fix CPSR/SPSR print size
918b8842a8 changed CPSR and SPSR to be stored as 64bit values.

This is fixing the print size in some tools to use 64bit type.

Fixes: 918b8842a8 ("arm64: Change type of hsr, cpsr, spsr_el1 to uint64_t")
Signed-off-by: Bertrand Marquis <bertrand.marquis@arm.com>
Reviewed-by: Michal Orzel <michal.orzel@arm.com>
Tested-by: Michal Orzel <michal.orzel@arm.com>
2021-07-07 13:07:46 +01:00
Julien Grall cc83cae4de tools/xen-foreign: Update the size for vcpu_guest_{core_regs, context}
Commit 918b8842a8 ("arm64: Change type of hsr, cpsr, spsr_el1 to
uint64_t") updated the size of the structure vcpu_guest_core_regs and
indirectly vcpu_guest_context.

On Arm, the two structures are only accessible to the tools and the
hypervisor (and therefore stable). However, they are still checked
by the scripts in tools/include/xen-foreign are not able to understand
that.

Ideally we should rework the scripts so we don't have to update
the size for non-stable structure. But I don't have limited time
to spend on the issue. So chose the simple solution and update
the size accordingly.

Note that we need to keep vcpu_guest_core_regs around because
the structure is used by vcpu_guest_context and therefore the
scripts expects the generated header to contain it.

Fixes: 918b8842a8 ("arm64: Change type of hsr, cpsr, spsr_el1 to uint64_t")
Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com>
Reviewed-by: Michal Orzel <michal.orzel@arm.com>
Tested-by: Michal Orzel <michal.orzel@arm.com>
2021-07-07 13:07:46 +01:00
Olaf Hering f17a73b3c0 tools/migration: unify type checking for data pfns in migration stream
Introduce a helper which decides if a given pfn type has data
in the migration stream.

No change in behaviour intended, except for invalid page types which now
have a safer default.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-07-06 10:49:58 +01:00
Olaf Hering 5588ebcfca tools/migration: unify type checking for data pfns in the VM
Introduce a helper which decides if a given pfn in the migration
stream is backed by memory.

This highlights more clearly that type XEN_DOMCTL_PFINFO_XALLOC (a
synthetic toolstack-only type used between Xen 4.2 to 4.5 which
indicated a dirty page on the sending side for which no data will be
send in the initial iteration) does get populated in the VM.

No change in behaviour intended, except for invalid page types which now
have a safer default.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
2021-07-06 10:49:58 +01:00
Olaf Hering 9e59d9f8ee tools/migration: unify known page type checking
Users of xc_get_pfn_type_batch may want to sanity check the data
returned by Xen. Add helpers for this purpose:

is_known_page_type verifies the type returned by Xen on the saving
side, or the incoming type for a page on the restoring side, is known
by the save/restore code.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
2021-07-06 10:49:58 +01:00
Olaf Hering a27976a108 tools/python: fix Python3.4 TypeError in format string
Using the first element of a tuple for a format specifier fails with
python3.4 as included in SLE12:
    b = b"string/%x" % (i, )
TypeError: unsupported operand type(s) for %: 'bytes' and 'tuple'

It happens to work with python 2.7 and 3.6.
To support older Py3, format as strings and explicitly encode as ASCII.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
2021-07-06 10:49:58 +01:00
Olaf Hering c8f88810db tools/python: handle libxl__physmap_info.name properly in convert-legacy-stream
The trailing member name[] in libxl__physmap_info is written as a
cstring into the stream. The current code does a sanity check if the
last byte is zero. This attempt fails with python3 because name[-1]
returns a type int. As a result the comparison with byte(\00) fails:

  File "/usr/lib/xen/bin/convert-legacy-stream", line 347, in read_libxl_toolstack
    raise StreamError("physmap name not NUL terminated")
  StreamError: physmap name not NUL terminated

To handle both python variants, cast to bytearray().

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
2021-07-06 10:49:58 +01:00
Julien Grall 09e2cd6995 tools/xenstored: Stash the correct request in lu_status->in
When Live-Updating with some load, Xenstored may hit the assert
req->in == lu_status->in in do_lu_start().

This is happening because the request is stashed when Live-Update
begins. This happens in a different request (see call lu_begin()
when select the new binary) from the one performing Live-Update.

To avoid the problem, stash the request in lu_start().

Fixes: 65f19ed62a ("tools/xenstore: Don't assume conn->in points to the LU request")
Reported-by: Michael Kurth <mku@amazon.com>
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: luca.fancellu@arm.com
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-07-06 09:50:57 +01:00
Sergiy Kibrik 33e48312cf libxl/arm: provide guests with random seed
Pass 128 bytes of random seed via FDT, so that guests' CRNGs are better seeded
early at boot. This is larger than ChaCha20 key size of 32, so each byte of
CRNG state will be mixed 4 times using this seed. There does not seem to be
advantage in larger seed though.

Depending on its configuration Linux can use the seed as device randomness
or to just quickly initialize CRNG.
In either case this will provide extra randomness to further harden CRNG.

Signed-off-by: Sergiy Kibrik <Sergiy_Kibrik@epam.com>
Reviewed-by: Julien Grall <julien@xen.org>
Reviewed-by: Michal Orzel <michal.orzel@arm.com>
2021-07-06 09:47:33 +01:00
Andrew Cooper 383b41974d tools/libxenguest: Fix migration's debug option
The code has gone through many refactors, but the first refactor was the one
which broke it by inverting the check with respect to checkpointed streams.

Fixes: 7449fb36c6 ("migration/save: pass checkpointed_stream from libxl to libxc")
Reported-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
2021-07-05 11:30:14 +01:00
Andrew Cooper 5fa174cbf5 tools/libxenguest: Fix max_extd_leaf calculation for legacy restore
0x1c is lower than any value which will actually be observed in
p->extd.max_leaf, but higher than the logical 9 leaves worth of extended data
on Intel systems, causing x86_cpuid_copy_to_buffer() to fail with -ENOBUFS.

Correct the calculation.

The problem was first noticed in c/s 34990446ca "libxl: don't ignore the
return value from xc_cpuid_apply_policy" but introduced earlier.

Fixes: 111c8c33a8 ("x86/cpuid: do not expand max leaves on restore")
Reported-by: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
2021-07-05 11:30:14 +01:00
Olaf Hering 74d044d51b tools: use integer division in convert-legacy-stream
A single slash gives a float, a double slash gives an int.

    bitmap = unpack_exact("Q" * ((max_id/64) + 1))
TypeError: can't multiply sequence by non-int of type 'float'

Use future division to remain compatible with python 2.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
2021-07-02 16:38:00 +01:00
Olaf Hering 67a50e393a tools: fix comment typo in libxl__cpuid_legacy
Replace emualted with emulated.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
2021-07-02 16:05:26 +01:00
Anthony PERARD 3bc3be978f libxl: Fix QEMU cmdline for scsi device
Usage of 'scsi-disk' device is deprecated and removed from QEMU,
instead we need to use 'scsi-hd' for hard drives.
See QEMU 879be3af49 (hw/scsi: remove 'scsi-disk' device)

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jason Andryuk <jandryuk@gmail.com>
2021-07-02 15:01:13 +01:00
Anthony PERARD 217eef30f7 libxl: Replace short-form boolean for QEMU's -vnc
f3f778c817 forgot one boolean parameter.

Fixes: f3f778c817 ("libxl: Replace QEMU's command line short-form boolean option")
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jason Andryuk <jandryuk@gmail.com>
2021-07-02 15:01:13 +01:00
Andrew Cooper c636a5fe59 Replace FSF street address with canonical URL (again)
As recommended in http://www.gnu.org/licenses/gpl-howto.en.html.

Exactly as per changeset 443701ef0c - Some errors have crept back in in
the past 6 years.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Julien Grall <jgrall@amazon.com>
2021-06-28 11:17:14 +01:00
Andrew Cooper 01a2d001de libxencall: Bump SONAME following new functionality
Fixes: bef64f2c00 ("libxencall: introduce variant of xencall2() returning long")
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Ian Jackson <iwj@xenproject.org>
2021-06-25 12:38:18 +01:00
Julien Grall 8a9b94982b tools/xenstored: Correctly read the requests header from the stream
Commit c0fe360f42 ("tools/xenstored: Extend restore code to handle
multiple input buffer") extend the read_buffered_state() to support
multiple input buffers. Unfortunately, the commit didn't go far
enough and still used sc->data (start of the buffers) for retrieving
the header. This would lead to read the wrong headers for second and
follow-up commands.

Use data in place for sc->data for the source of the memcpy()s.

Fixes: c0fe360f42 ("tools/xenstored: Extend restore code to handle multiple input buffer")
Reported-by: Raphael Ning <raphning@amazon.com>
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-25 10:40:06 +01:00
Julien Grall e87d8f60fa tools/xenstored: Remove redundant check in socket_can_process()
Commit 3adfb50315 ("tools/xenstored: Introduce a wrapper for
conn->funcs->can_{read, write}") consolidated the check
!conn->is_ignored in two new wrappers.

This means the check in socket_can_process() is now redundant. In
fact it should have been removed in orignal commit (as it was done
for the domain helpers).

Reported-by: Raphael Ning <raphning@amazon.com
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 15:55:49 +01:00
Jan Beulich 190facdf87 libxc: make xc_domain_maximum_gpfn() endianness-agnostic
libxc generally uses uint32_t to represent domain IDs. This is fine as
long as addresses of such variables aren't taken, to then pass into
hypercalls: To the hypervisor, a domain ID is a 16-bit value. Introduce
a wrapper struct to deal with the issue. (On architectures with
arguments passed in registers, an intermediate variable would have been
created by the compiler already anyway, just one of the wrong type.)

The public interface change is both source and binary compatible for
the architectures we currently support.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Jackson <iwj@xenproject.org>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
2021-06-24 16:40:57 +02:00
Jan Beulich 7ffbed8681 libxencall: drop bogus mentioning of xencall6()
There's no xencall6(), so the version script also shouldn't mention it.
If such a function would ever appear, it shouldn't land in version 1.0.

No change to the generated binary, nor abi-dumper's view of the object.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Jackson <iwj@xenproject.org>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
2021-06-24 16:39:55 +02:00
Jan Beulich 6f02d1ea4a libxc: use multicall for memory-op on Linux (and Solaris)
Some sub-functions, XENMEM_maximum_gpfn and XENMEM_maximum_ram_page in
particular, can return values requiring more than 31 bits to represent.
Hence we cannot issue the hypercall directly when the return value of
ioctl() is used to propagate this value. This is the case for Linux
and Solaris (and hence needs changing), while the BSDs avoid using the
return value for dual purposes altogether, and MiniOS already wraps all
hypercalls in a multicall.

Suggested-by: Jürgen Groß <jgross@suse.com>
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Jackson <iwj@xenproject.org>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
2021-06-24 16:39:26 +02:00
Jan Beulich bef64f2c00 libxencall: introduce variant of xencall2() returning long
Some hypercalls, memory-op in particular, can return values requiring
more than 31 bits to represent. Hence the underlying layers need to make
sure they won't truncate such values.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Ian Jackson <iwj@xenproject.org>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
2021-06-24 16:39:02 +02:00
Jan Beulich 6409210a5f libxencall: osdep_hypercall() should return long
Some hypercalls, memory-op in particular, can return values requiring
more than 31 bits to represent. Hence the underlying layers need to make
sure they won't truncate such values. (Note that for Solaris the
function also gets renamed, to match the other OSes.)

Due to them merely propagating ioctl()'s return value, this change is
benign on Linux and Solaris. IOW there's an actual effect here only for
the BSDs and MiniOS, but even then further adjustments are needed at the
xencall<N>() level.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Ian Jackson <iwj@xenproject.org>
2021-06-24 16:38:37 +02:00
Julien GralL 90bafdba8e tools/xenstored: Don't crash xenstored when Live-Update is cancelled
As Live-Update is asynchronous, it is possible to receive a request to
cancel it (either on the same connection or from a different one).

Currently, this will crash xenstored because do_lu_start() assumes
lu_status will be valid. This is not the case when Live-Update has been
cancelled. This will result to dereference a NULL pointer and
crash Xenstored.

Rework do_lu_start() to check if lu_status is NULL and return an
error in this case.

Fixes: af216a99fb ("tools/xenstore: add the basic framework for doing the live update")
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 12:15:49 +01:00
Julien Grall c8be420025 tools/xenstored: Delay new transaction while Live-Update is pending
At the moment, Live-Update will, by default, not proceed if there are
in-flight transactions. It is possible force it by passing -F but this
will break any connection with in-flight transactions.

There are PV drivers out that may never terminate some transaction. On
host running such guest, we would need to use -F. Unfortunately, this
also risks to break well-behaving guests (and even dom0) because
Live-Update will happen as soon as the timeout is hit.

Ideally, we would want to preserve transactions but this requires
some work and a lot of testing to be able to use it in production.

As a stop gap, we want to limit the damage of -F. This patch will delay
any transactions that are started after Live-Update has been requested.

If the request cannot be delayed, the connection will be stalled to
avoid loosing requests.

If the connection has already a pending transaction before Live-Update,
then new transaction will not be delayed. This is to avoid the connection
to stall.

With this stop gap in place, domains with long running transactions will
still break when using -F, but other domains which starts a transaction
in the middle of Live-Update will continue to work.

Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 12:14:56 +01:00
Julien Grall 54f73e6fc6 tools/xenstored: Dump delayed requests
Currently, only Live-Update request can be delayed. In a follow-up,
we will want to delay more requests (e.g. transaction start).
Therefore we want to preserve delayed requests across Live-Update.

Delayed requests are just complete "in" buffer. So the code is
refactored to allow sharing the code to dump "in" buffer.

Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 12:12:54 +01:00
Julien Grall c0fe360f42 tools/xenstored: Extend restore code to handle multiple input buffer
Currently, the restore code is considering the stream will contain at
most one in-flight request per connection. In a follow-up changes, we
will want to transfer multiple in-flight requests.

The function read_state_buffered() is now extended to restore multiple
in-flight request. Complete requests will be queued as delayed
requests, if there a partial request (only the last one can) then it
will used as the current in-flight request.

Note that we want to bypass the quota check for delayed requests as
the new Xenstore may have a lower limit.

Lastly, there is no need to change the specification as there was
no restriction on the number of in-flight requests preserved.

Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 11:41:00 +01:00
Julien Grall 361f1deb42 tools/xenstored: delay_request: don't assume conn->in == in
delay_request() is currently assuming that the request delayed is
always conn->in. This is currently correct, but it is a call for
a latent bug as the function allows the caller to specify any request.

To prevent any future surprise, check if the request delayed is the
current one.

Fixes: c5ca1404b4 ("tools/xenstore: add support for delaying execution of a xenstore request")
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 09:08:56 +01:00
Julien Grall 3adfb50315 tools/xenstored: Introduce a wrapper for conn->funcs->can_{read, write}
Currently, the callbacks can_read and can_write are called directly. This
doesn't allow us to add generic check and therefore requires duplication.

At the moment, one check that could benefit to be common is whether the
connection should ignored. The position is slightly different between
domain and socket because for the latter we want to check the state of
the file descriptor first.

In follow-up patches, there will be more potential generic checks.

This patch provides wrappers to read/write a connection and move
the check ->is_ignored after the callback for everyone.

This also requires to replace the direct call to domain_can_read()
and domain_can_write() with the new wrapper. At the same time,
both functions can now be static. Note that the implementations need
to be moved earlier in the file xenstored_domain.c to avoid
declaring the prototype.

Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 09:08:42 +01:00
Julien Grall a8002238b4 tools/xenstored: xenstored_core.h should include fcntl.h
xenstored_core.h will consider live-udpate is not supported if
O_CLOEXEC doesn't exist. However, the header doesn't include the one
defining O_CLOEXEC (i.e. fcntl.h). This means that depending on
the header included, some source file will think Live-Update is not
supported.

I am not aware of any issue with the existing. Therefore this is just
a latent bug so far.

Prevent any potential issue by including fcntl.h in xenstored_core.h

Fixes: cd831ee438 ("tools/xenstore: handle CLOEXEC flag for local files and pipes")
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 09:07:52 +01:00
Julien Grall 2aa9e00bd3 tools/xenstored: Limit the number of requests a connection can delay
Currently, only liveupdate request can be delayed. The request can only
be performed by a privileged connection (e.g. dom0). So it is fine to
have no limits.

In a follow-up patch we will want to delay request for unprivileged
connection as well. So it is best to apply a limit.

For now and for simplicity, only a single request can be delayed
for a given unprivileged connection.

Take the opportunity to tweak the prototype and provide a way to
bypass the quota check. This would be useful when the function
is called from the restore code.

Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 09:07:30 +01:00
Julien Grall 65f19ed62a tools/xenstore: Don't assume conn->in points to the LU request
call_delayed() is currently assuming that conn->in is NULL when
handling delayed request. However, the connection is not paused.
Therefore new request can be processed and conn->in may be non-NULL
if we have only received a partial request.

Furthermore, as we overwrite conn->in, the current partial request
will not be transferred. This will result to corrupt the connection.

Rather than updating conn->in, stash the LU request in lu_status and
let each callback for delayed request to update conn->in when
necessary.

To keep a sane interface, the code to write the "OK" response the
LU request is moved in xenstored_core.c.

Fixes: c5ca1404b4 ("tools/xenstore: add support for delaying execution of a xenstore request")
Fixes: ed6eebf17d ("tools/xenstore: dump the xenstore state for live update")
Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 09:06:58 +01:00
Julien Grall 3ce271ef53 tools/xenstored: Introduce lu_get_connection() and use it
At the moment, dump_state_buffered_data() is taking two connections
in parameters (one is the connection to dump, the other is the
connection used to request LU). The naming doesn't help to
distinguish (c vs conn) them and this already lead to several mistake
while modifying the function.

To remove the confusion, introduce an help lu_get_connection() that
will return the connection used to request LU and use it
in place of the existing parameter.

Signed-off-by: Julien Grall <jgrall@amazon.com>
Reviewed-by: Luca Fancellu <luca.fancellu@arm.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
2021-06-24 09:02:59 +01:00
Andrew Cooper c7691f5e34 Revert "tools/firmware/ovmf: Use OvmfXen platform file is exist"
This reverts commit aad7b5c11d.

The change from OvmfX64 to OvmfXen causes a change in behaviour, whereby
OvmfXen maps its shared info page at the top of address space.  When trying to
migrate such a domain, XENMEM_maximum_gpfn returns a very large value.  This
has uncovered multiple issues:

 1) The userspace hypercall wrappers truncate all return values to int on
    Linux and Solaris, even on 64bit.  This needs fixing in libxenctrl.
 2) 32bit toolstacks can't migrate any domain with RAM above the 2^40 mark,
    because of virtual address constraints.  This needs fixing in OVMF.

Fixes for both of these aren't completely trivial.  Revert the change to
unblock staging in the meantime.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
2021-06-22 18:00:08 +01:00
Nick Rosbrook c9b59f9032 golang/xenlight: do not negate ret when converting to Error
Commit 871e51d2d4 changed the sign on the xenlight error types (making
the values negative, same as the C-generated constants), but failed to
remove the code changing the sign before casting to Error().  This
results in error strings like "libxl error: <x>", rather than the
correct message. Fix all occurrances of this by running:

  gofmt -w -r 'Error(-ret) -> Error(ret)' xenlight.go

from tools/golang/xenlight.

Signed-off-by: Nick Rosbrook <rosbrookn@ainfosec.com>
Acked-by: George Dunlap <george.dunlap@citrix.com>
2021-06-21 16:49:08 +01:00
Nick Rosbrook 1d95fd75df golang/xenlight: add SendTrigger wrapper
Add a warpper around libxl_send_trigger.

Signed-off-by: Nick Rosbrook <rosbrookn@ainfosec.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
2021-06-21 16:49:08 +01:00
Nick Rosbrook 9b6d865e0a golang/xenlight: add DomainDestroy wrapper
Add a wrapper around libxl_domain_destroy.

Signed-off-by: Nick Rosbrook <rosbrookn@ainfosec.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
2021-06-21 16:49:08 +01:00
Nick Rosbrook c089de0e2f golang/xenlight: rename Ctx receivers to ctx
As a matter of style, it is strange to see capitalized receiver names,
due to the significance of capitalized symbols in Go (although there is
in fact nothing special about a capitalized receiver name). Fix this in
xenlight.go by running:

  gofmt -w -r 'Ctx -> ctx' xenlight.go

from tools/golang/xenlight. There is no functional change.

Signed-off-by: Nick Rosbrook <rosbrookn@ainfosec.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
2021-06-21 16:49:08 +01:00
Nick Rosbrook 1997940ad2 golang/xenlight: use struct pointers in keyed union fields
Currently, when marshalig Go types with keyed union fields, we assign the
value of the struct (e.g. DomainBuildInfoTypeUnionHvm) which implements the
interface of the keyed union field (e.g. DomainBuildInfoTypeUnion).
As-is, this means that if a populated DomainBuildInfo is marshaled to
e.g. JSON, unmarshaling back to DomainBuildInfo will fail.

When the encoding/json is unmarshaling data into a Go type, and
encounters a JSON object, it basically can either marshal the data into
an empty interface, a map, or a struct. It cannot, however, marshal data
into an interface with at least one method defined on it (e.g.
DomainBuildInfoTypeUnion). Before this check is done, however, the
decoder will check if the Go type is a pointer, and dereference it if
so. It will then use the type of this value as the "target" type.

This means that if the TypeUnion field is populated with a
DomainBuildInfoTypeUnion, the decoder will see a non-empty interface and
fail. If the TypeUnion field is populated with a
*DomainBuildInfoTypeUnionHvm, it dereferences the pointer and sees a
struct instead, allowing decoding to continue normally.

Since there does not appear to be a strict need for NOT using pointers
in these fields, update code generation to set keyed union fields to
pointers of their implementing structs.

Signed-off-by: Nick Rosbrook <rosbrookn@ainfosec.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
2021-06-21 16:49:08 +01:00
Nick Rosbrook bc9f632e31 golang/xenlight: export keyed union interface types
For structs that have a keyed union, e.g. DomainBuildInfo, the TypeUnion
field must be exported so that package users can get/set the fields
within. This means that users are aware of the existence of the
interface type used in those fields (see [1]), so it is awkward that the
interface itself is not exported. However, the single method within the
interface must remain unexported so that users cannot mistakenly "implement"
those interfaces.

Since there seems to be no reason to do otherwise, export the keyed
union interface types.

[1] https://pkg.go.dev/xenbits.xenproject.org/git-http/xen.git/tools/golang/xenlight?tab=doc#DeviceUsbdev

Signed-off-by: Nick Rosbrook <rosbrookn@ainfosec.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
2021-06-21 16:49:08 +01:00
Nick Rosbrook 1422d8db1b golang/xenlight: fix StringList toC conversion
The current implementation of StringList.toC does not correctly account
for how libxl_string_list is expected to be laid out in C, which is clear
when one looks at libxl_string_list_length in libxl.c. In particular,
StringList.toC does not account for the extra memory that should be
allocated for the "sentinel" entry. And, when using the "slice trick" to
create a slice that can address C memory, the unsafe.Pointer conversion
should be on a C.libxl_string_list, not *C.libxl_string_list.

Fix these problems by (1) allocating an extra slot in the slice used to
address the C memory, and explicity set the last entry to nil so the C
memory will be zeroed out, and (2) dereferencing csl in the
unsafe.Pointer conversion.

Signed-off-by: Nick Rosbrook <rosbrookn@ainfosec.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
2021-06-21 16:49:08 +01:00
Nick Rosbrook b291ce703b golang/xenlight: update generated code
Re-generate code to reflect changes to libxl_types.idl from the
following commits:

0570d7f276 x86/msr: introduce an option for compatible MSR behavior selection
7e5cffcd1e viridian: allow vCPU hotplug for Windows VMs
9835246710 viridian: remove implicit limit of 64 VPs per partition

Signed-off-by: Nick Rosbrook <rosbrookn@ainfosec.com>
Reviewed-by: George Dunlap <george.dunlap@citrix.com>
2021-06-21 16:49:08 +01:00
Andrew Cooper 4bcf6433ee tests: Introduce a TSX test
See the comment at the top of test-tsx.c for details.

This covers various complexities encountered while trying to address the
recent TSX deprecation on client parts.

A sample run on KabyLake with latest microcode and default tsx= looks like
this:

  root@host# ./test-tsx
  TSX tests
    Got 8 CPUs
  Testing MSR_TSX_FORCE_ABORT consistency
    CPU0 val 0x3
  Testing MSR_TSX_CTRL consistency
  Testing RTM behaviour
    Got Abort
  Testing PV default/max policies
    Max: RTM 1, HLE 1, TSX_FORCE_ABORT 0, RTM_ALWAYS_ABORT 0, TSX_CTRL 0
    Def: RTM 0, HLE 0, TSX_FORCE_ABORT 0, RTM_ALWAYS_ABORT 0, TSX_CTRL 0
  Testing HVM default/max policies
    Max: RTM 1, HLE 1, TSX_FORCE_ABORT 0, RTM_ALWAYS_ABORT 0, TSX_CTRL 0
    Def: RTM 0, HLE 0, TSX_FORCE_ABORT 0, RTM_ALWAYS_ABORT 0, TSX_CTRL 0
  Testing PV guest
    Created d7
    Cur: RTM 0, HLE 0, TSX_FORCE_ABORT 0, RTM_ALWAYS_ABORT 0, TSX_CTRL 0
    Cur: RTM 1, HLE 1, TSX_FORCE_ABORT 0, RTM_ALWAYS_ABORT 0, TSX_CTRL 0
  Testing HVM guest
    Created d8
    Cur: RTM 0, HLE 0, TSX_FORCE_ABORT 0, RTM_ALWAYS_ABORT 0, TSX_CTRL 0
    Cur: RTM 1, HLE 1, TSX_FORCE_ABORT 0, RTM_ALWAYS_ABORT 0, TSX_CTRL 0

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
2021-06-15 20:50:32 +01:00
Andrew Cooper f7ad9ee7ca libs/guest: Move struct xc_cpu_policy into xg_private.h
... so tests can peek at the internals, without the structure being generally
available to users of the library.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
2021-06-15 20:50:32 +01:00
Anthony PERARD 5d3e4ebb5c libs/foreignmemory: Fix osdep_xenforeignmemory_map prototype
Commit cf8c4d3d13 made some preparation to have one day
variable-length-array argument, but didn't declare the array in the
function prototype the same way as in the function definition. And now
GCC 11 complains about it.

Fixes: cf8c4d3d13 ("tools/libs/foreignmemory: pull array length argument to map forward")
Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
2021-06-15 18:07:58 +01:00
Anthony PERARD fe6630ddc4 libxl: Replace QMP command "change" by "blockdev-change-media"
"change" command as been removed in QEMU 6.0. We can use
"blockdev-change-medium" instead.

Using `id` with "blockdev-change-medium" requires a change to the QEMU
command line, introduced by:
    "libxl: Use -device for cd-rom drives"

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jason Andryuk <jandryuk@gmail.com>
2021-06-15 13:56:26 +01:00
Anthony PERARD 0c0b3a7e4a libxl: Use id with the "eject" QMP command
`device` parameter is deprecated since QEMU 2.8.

This requires changes to the command line introduced by:
    "libxl: Use -device for cd-rom drives"

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jason Andryuk <jandryuk@gmail.com>
2021-06-15 13:56:26 +01:00
Anthony PERARD 7c313e8365 libxl: Export libxl__qmp_ev_qemu_compare_version
We are going to want to check QEMU's version in other places where we
can use libxl__ev_qmp_send.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jason Andryuk <jandryuk@gmail.com>
2021-06-15 13:56:26 +01:00
Anthony PERARD 0ff26a3225 libxl: Assert qmp_ev's state in qmp_ev_qemu_compare_version
We are supposed to read the version information only when qmp_ev is in
state "Connected" (that correspond to state==qmp_state_connected),
assert it so that the function isn't used too early.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Jason Andryuk <jandryuk@gmail.com>
2021-06-15 13:56:26 +01:00