Commit Graph

52199 Commits

Author SHA1 Message Date
Markus Armbruster 2cfbae3c42 qapi: Have each QAPI schema declare its name rule violations
qapi.py has a hardcoded white-list of type names that may violate the
rule on use of upper and lower case.  Add a new pragma directive
'name-case-whitelist', and use it to replace the hard-coded
white-list.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1489582656-31133-7-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2017-03-16 07:13:02 +01:00
Markus Armbruster 1554a8fae9 qapi: Have each QAPI schema declare its returns white-list
qapi.py has a hardcoded white-list of command names that may violate
the rules on permitted return types.  Add a new pragma directive
'returns-whitelist', and use it to replace the hard-coded white-list.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1489582656-31133-6-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2017-03-16 07:13:02 +01:00
Markus Armbruster 700dc9f503 docs/qapi-code-gen.txt: Drop confusing reference to 'gen'
Section "Commands" qualifies its rules on permitted argument and
return types "with one exception noted below when 'gen' is used".  The
note went away in commit 2d21291.  Clean up the dangling references.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1489582656-31133-5-git-send-email-armbru@redhat.com>
2017-03-16 07:13:01 +01:00
Markus Armbruster 87c16dceca qapi: Back out doc comments added just to please qapi.py
This reverts commit 3313b61's changes to tests/qapi-schema/, except
for tests/qapi-schema/doc-*.

We could keep some of these doc comments to serve as positive test
cases.  However, they don't actually add to what we get from doc
comment use in actual schemas, as we we don't test output matches
expectations, and don't systematically cover doc comment features.
Proper positive test coverage would be nice.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <1489582656-31133-4-git-send-email-armbru@redhat.com>
2017-03-16 07:13:01 +01:00
Markus Armbruster bc52d03ff5 qapi: Make doc comments optional where we don't need them
Since we added the documentation generator in commit 3313b61, doc
comments are mandatory.  That's a very good idea for a schema that
needs to be documented, but has proven to be annoying for testing.

Make doc comments optional again, but add a new directive

    { 'pragma': { 'doc-required': true } }

to let a QAPI schema require them.

Add test cases for the new pragma directive.  While there, plug a
minor hole in includ directive test coverage.

Require documentation in the schemas we actually want documented:
qapi-schema.json and qga/qapi-schema.json.

We could probably make qapi2texi.py cope with incomplete
documentation, but for now, simply make it refuse to run unless the
schema has 'doc-required': true.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1489582656-31133-3-git-send-email-armbru@redhat.com>
[qapi-code-gen.txt wording tweaked]
Reviewed-by: Eric Blake <eblake@redhat.com>
2017-03-16 07:13:01 +01:00
Markus Armbruster e04dea8872 qapi: Factor QAPISchemaParser._include() out of .__init__()
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1489582656-31133-2-git-send-email-armbru@redhat.com>
2017-03-16 07:13:01 +01:00
Daniel P. Berrange f880cd6b6f qmp: allow setting properties to empty string in qmp-shell
The qmp-shell property parser currently rejects attempts to
set string properties to the empty string eg

  (QEMU) migrate-set-parameters  tls-hostname=
  Error while parsing command line: Expected a key=value pair, got 'tls-hostname='
command format: <command-name>  [arg-name1=arg1] ... [arg-nameN=argN]

This is caused by checking the wrong condition after splitting
the parameter on '='. The "partition" method will return "" for
the separator field, if the seperator was not present, so that
is the correct thing to check for malformed syntax.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <20170302122429.7737-1-berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-03-16 07:13:01 +01:00
Marc-André Lureau 597494abde qapi2texi: change texi formatters
STRUCT_FMT is generic enough, rename it to TYPE_FMT, use it for unions.

Rename COMMAND_FMT to MSG_FMT, since it applies to both commands and
events.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170125130308.16104-2-marcandre.lureau@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-03-16 07:12:54 +01:00
Peter Maydell 1883ff34b5 virtio, pc: fixes
Some fixes to fallback from using virtio caching,
 pls a minor vm gen id fix.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

virtio, pc: fixes

Some fixes to fallback from using virtio caching,
pls a minor vm gen id fix.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Wed 15 Mar 2017 17:59:25 GMT
# gpg:                using RSA key 0x281F0DB8D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>"
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>"
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream:
  virtio-pci: reset modern vq meta data
  Revert "virtio: unbreak virtio-pci with IOMMU after caching ring translations"
  pci: introduce a bus master container
  virtio: validate address space cache during init
  virtio: destroy region cache during reset
  virtio: guard against NULL pfn
  Bugfix: Handle error if VM Generation ID device not present

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-15 18:44:05 +00:00
Jason Wang 60a8d80234 virtio-pci: reset modern vq meta data
We don't reset proxy->vqs[].{num|desc[]|avail[]|used[]}. This means if
a driver enable the vq without setting vq address after reset. The old
addresses were leaked. Fixing this by resetting modern vq meta data
during device reset.

Cc: qemu-stable@nongnu.org
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-03-15 19:59:18 +02:00
Jason Wang f0edf23978 Revert "virtio: unbreak virtio-pci with IOMMU after caching ring translations"
This reverts commit
96a8821d21. Previous patch is a better
solution which does not require a strict order between virtio and IOMMU.

CC: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2017-03-15 19:59:00 +02:00
Peter Maydell de71fb96bf Miscellaneous patches for 2017-03-15
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Merge remote-tracking branch 'remotes/armbru/tags/pull-misc-2017-03-15' into staging

Miscellaneous patches for 2017-03-15

# gpg: Signature made Wed 15 Mar 2017 13:12:35 GMT
# gpg:                using RSA key 0x3870B400EB918653
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>"
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>"
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* remotes/armbru/tags/pull-misc-2017-03-15:
  coverity-model: model address_space_read/write
  tests: Use error_free_or_abort() where appropriate

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-15 17:54:41 +00:00
Jason Wang 3716d5902d pci: introduce a bus master container
96a8821d21 ("virtio: unbreak virtio-pci with IOMMU after caching ring
translations") tries to make IOMMU works with virtio memory region
cache, but it requires IOMMU to be created before any virtio
devices. This is sub optimal, fixing this by introduce a bus master
container to make sure address space can be initialized during device
registering, and then we can safely set alias and make
bus_master_enable_region as its subregion during bus master
initialization.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-03-15 19:37:19 +02:00
Jason Wang e45da65322 virtio: validate address space cache during init
We don't check the return value of address_space_cache_init(), this
may lead buggy driver use incorrect region caches. Instead of
triggering an assert, catch and warn this early in
virtio_init_region_cache().

Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-03-15 19:37:19 +02:00
Jason Wang e0e2d64409 virtio: destroy region cache during reset
We don't destroy region cache during reset which can make the maps
of previous driver leaked to a buggy or malicious driver that don't
set vring address before starting to use the device. Fix this by
destroy the region cache during reset and validate it before trying to
see them.

Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-03-15 19:37:19 +02:00
Jason Wang 168e4af3c1 virtio: guard against NULL pfn
To avoid access stale memory region cache after reset, this patch
check the existence of virtqueue pfn for all exported virtqueue access
helpers before trying to use them.

Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-03-15 19:37:19 +02:00
Ben Warren 72d9196f1e Bugfix: Handle error if VM Generation ID device not present
This was crashing due to NULL-pointer dereference

QMP Test case:
==============

(QEMU) query-vm-generation-id
{"error": {"class": "GenericError", "desc": "VM Generation ID device not
found"}}

HMP Test case:
==============
virsh # qemu-monitor-command --hmp 3 info vm-generation-id
VM Generation ID device not found

Signed-off-by: Ben Warren <ben@skyportsystems.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2017-03-15 19:37:19 +02:00
Peter Maydell 7584bf5e6f -----BEGIN PGP SIGNATURE-----
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Merge remote-tracking branch 'remotes/stefanha/tags/block-pull-request' into staging

# gpg: Signature made Wed 15 Mar 2017 05:05:04 GMT
# gpg:                using RSA key 0x9CA4ABB381AB73C8
# gpg: Good signature from "Stefan Hajnoczi <stefanha@redhat.com>"
# gpg:                 aka "Stefan Hajnoczi <stefanha@gmail.com>"
# Primary key fingerprint: 8695 A8BF D3F9 7CDA AC35  775A 9CA4 ABB3 81AB 73C8

* remotes/stefanha/tags/block-pull-request:
  os: don't corrupt pre-existing memory-backend data with prealloc

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-15 14:19:59 +00:00
Peter Maydell 926e368388 Fix global property and -cpu handling bug
This bug fix was supposed to be applied just after 2.8.0 was
 released, but it slipped through the cracks. Sending it now for
 the next -rc.
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Merge remote-tracking branch 'remotes/ehabkost/tags/machine-pull-request' into staging

Fix global property and -cpu handling bug

This bug fix was supposed to be applied just after 2.8.0 was
released, but it slipped through the cracks. Sending it now for
the next -rc.

# gpg: Signature made Tue 14 Mar 2017 20:04:50 GMT
# gpg:                using RSA key 0x2807936F984DC5A6
# gpg: Good signature from "Eduardo Habkost <ehabkost@redhat.com>"
# Primary key fingerprint: 5A32 2FD5 ABC4 D3DB ACCF  D1AA 2807 936F 984D C5A6

* remotes/ehabkost/tags/machine-pull-request:
  machine: Convert abstract typename on compat_props to subclass names

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-15 13:07:08 +00:00
Paolo Bonzini 4d0e72396b coverity-model: model address_space_read/write
Commit eb7eeb8 ("memory: split address_space_read and
address_space_write", 2015-12-17) made address_space_rw
dispatch to one of address_space_read or address_space_write,
rather than vice versa.

For callers of address_space_read and address_space_write this
causes false positive defects when Coverity sees a length-8 write in
address_space_read and a length-4 (e.g. int*) buffer to read into.
As long as the size of the buffer is okay, this is a false positive.

Reflect the code change into the model.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20170315081641.20588-1-pbonzini@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-03-15 13:59:16 +01:00
Markus Armbruster 157db293eb tests: Use error_free_or_abort() where appropriate
Done with this Coccinelle semantic patch:

    @@
    expression E;
    @@
    -    g_assert(E);
    -    error_free(E);
    +    error_free_or_abort(&E);

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1487362554-5688-1-git-send-email-armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
2017-03-15 08:52:09 +01:00
Daniel P. Berrange 9dc44aa582 os: don't corrupt pre-existing memory-backend data with prealloc
When using a memory-backend object with prealloc turned on, QEMU
will memset() the first byte in every memory page to zero. While
this might have been acceptable for memory backends associated
with RAM, this corrupts application data for NVDIMMs.

Instead of setting every page to zero, read the current byte
value and then just write that same value back, so we are not
corrupting the original data. Directly write the value instead
of memset()ing it, since there's no benefit to memset for a
single byte write.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Message-id: 20170303113255.28262-1-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-03-15 11:55:41 +08:00
Eduardo Habkost 0bcba41fe3 machine: Convert abstract typename on compat_props to subclass names
Original problem description by Greg Kurz:

> Since commit "9a4c0e220d8a hw/virtio-pci: fix virtio
> behaviour", passing -device virtio-blk-pci.disable-modern=off
> has no effect on 2.6 machine types because the internal
> virtio-pci.disable-modern=on compat property always prevail.

The same bug also affects other abstract type names mentioned on
compat_props by machine-types: apic-common, i386-cpu, pci-device,
powerpc64-cpu, s390-skeys, spapr-pci-host-bridge, usb-device,
virtio-pci, x86_64-cpu.

The right fix for this problem is to make sure compat_props and
-global options are always applied in the order they are
registered, instead of reordering them based on the type
hierarchy. But changing the ordering rules of -global is risky
and might break existing configurations, so we shouldn't do that
on a stable branch.

This is a temporary hack that will work around the bug when
registering compat_props properties: if we find an abstract class
on compat_props, register properties for all its non-abstract
subtypes instead. This will make sure -global won't be overridden
by compat_props, while keeping the existing ordering rules on
-global options.

Note that there's one case that won't be fixed by this hack:
"-global spapr-pci-vfio-host-bridge.<option>=<value>" won't be
able to override compat_props, because spapr-pci-host-bridge is
not an abstract class.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1481575745-26120-1-git-send-email-ehabkost@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Reviewed-by: Halil Pasic <pasic@linux.vnet.ibm.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Tested-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-03-14 16:53:44 -03:00
Peter Maydell d84f714eaf Update version for v2.9.0-rc0 release
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-14 19:18:23 +00:00
Peter Maydell 64c358a33a * "x" monitor command fix for KVM (Christian)
* MemoryRegion name documentation (David)
 * mem-prealloc optimization (Jitendra)
 * -icount/MTTCG fixes (me)
 * "info mtree" niceness (Peter)
 * NBD drop_sync buffer overflow (Vladimir/Eric)
 * small cleanups and bugfixes (Li, Lin, Suramya, Thomas)
 * fix for "-device kvmclock" w/TCG (Eduardo)
 * debug output before crashing on KVM_{GET,SET}_MSRS (Eduardo)
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* "x" monitor command fix for KVM (Christian)
* MemoryRegion name documentation (David)
* mem-prealloc optimization (Jitendra)
* -icount/MTTCG fixes (me)
* "info mtree" niceness (Peter)
* NBD drop_sync buffer overflow (Vladimir/Eric)
* small cleanups and bugfixes (Li, Lin, Suramya, Thomas)
* fix for "-device kvmclock" w/TCG (Eduardo)
* debug output before crashing on KVM_{GET,SET}_MSRS (Eduardo)

# gpg: Signature made Tue 14 Mar 2017 13:42:05 GMT
# gpg:                using RSA key 0xBFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4  E2F7 7E15 100C CD36 69B1
#      Subkey fingerprint: F133 3857 4B66 2389 866C  7682 BFFB D25F 78C7 AE83

* remotes/bonzini/tags/for-upstream:
  nbd/client: fix drop_sync [CVE-2017-2630]
  memory: info mtree check mr range overflow
  icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread
  main-loop: remove now unnecessary optimization
  cpus: define QEMUTimerListNotifyCB for QEMU system emulation
  qemu-timer: do not include sysemu/cpus.h from util/qemu-timer.h
  qemu-timer: fix off-by-one
  target/nios2: take BQL around interrupt check
  scsi: mptsas: fix the wrong reading size in fetch request
  util: Removed unneeded header from path.c
  configure: add the missing help output for optional features
  scripts/dump-guest-memory.py: fix int128_get64 on recent gcc
  kvmclock: Don't crash QEMU if KVM is disabled
  kvm: Print MSR information if KVM_{GET,SET}_MSRS failed
  exec: add cpu_synchronize_state to cpu_memory_rw_debug
  mem-prealloc: reduce large guest start-up and migration time.
  docs: Add a note about mixing bootindex with "-boot order"
  memory_region: Fix name comments

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-14 16:52:17 +00:00
Peter Maydell 5e2fb7c598 hw/misc/imx6_src: Don't crash trying to reset missing CPUs
Commit 4881658a4b introduced a call to arm_get_cpu_by_id(),
and Coverity noticed that we weren't checking that it didn't
return NULL (CID 1371652).

Normally this won't happen (because all 4 CPUs are expected
to exist), but it's possible the user requested fewer CPUs
on the command line. Handle this possibility by silently
doing nothing, which is the same behaviour as before commit
4881658a4b and also how we handle the other CPU operations
(since we ignore the INVALID_PARAM returns from arm_set_cpu_on()
and friends).

There is a slight behavioural difference to the pre-4881658a4b
situation: the "reset this core" bit will remain set rather
than not being permitted to be set. The imx6 datasheet is
unclear about the behaviour in this odd corner case, so we
opt for the simpler code rather than complicated logic to
maintain identical behaviour.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1488542374-1256-1-git-send-email-peter.maydell@linaro.org
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2017-03-14 16:13:22 +00:00
Programmingkid 5f26fcfb98 ui/cocoa.m: add toast file support
Add the ability for the user to use .toast files with QEMU. This format works
just like ISO files.

Signed-off-by: John Arbuckle <programmingkidx@gmail.com>
Message-id: 0C9DA454-E3DC-4291-806E-9A96557DE833@gmail.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-14 15:09:56 +00:00
Peter Maydell 486fc7a837 target-arm queue:
* arm-powerctl: Fix psci info return values
  * implement armv8 PMUSERENR (user-mode enable bits)
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Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20170314' into staging

target-arm queue:
 * arm-powerctl: Fix psci info return values
 * implement armv8 PMUSERENR (user-mode enable bits)

# gpg: Signature made Tue 14 Mar 2017 11:31:11 GMT
# gpg:                using RSA key 0x3C2525ED14360CDE
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>"
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>"
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>"
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* remotes/pmaydell/tags/pull-target-arm-20170314:
  target/arm/arm-powerctl: Fix psci info return values
  target/arm: implement armv8 PMUSERENR (user-mode enable bits)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-14 14:11:38 +00:00
Vladimir Sementsov-Ogievskiy 2563c9c6b8 nbd/client: fix drop_sync [CVE-2017-2630]
Comparison symbol is misused. It may lead to memory corruption.
Introduced in commit 7d3123e.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20170203154757.36140-6-vsementsov@virtuozzo.com>
[eblake: add CVE details, update conditional]
Signed-off-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170307151627.27212-1-eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 14:41:19 +01:00
Peter Xu b31f841262 memory: info mtree check mr range overflow
The address of memory regions might overflow when something wrong
happened, like reported in:

https://lists.gnu.org/archive/html/qemu-devel/2017-03/msg02043.html

For easier debugging, let's try to detect it.

Reported-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1489496187-624-1-git-send-email-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:57:52 +01:00
Paolo Bonzini 6b8f0187a4 icount: process QEMU_CLOCK_VIRTUAL timers in vCPU thread
icount has become much slower after tcg_cpu_exec has stopped
using the BQL.  There is also a latent bug that is masked by
the slowness.

The slowness happens because every occurrence of a QEMU_CLOCK_VIRTUAL
timer now has to wake up the I/O thread and wait for it.  The rendez-vous
is mediated by the BQL QemuMutex:

- handle_icount_deadline wakes up the I/O thread with BQL taken
- the I/O thread wakes up and waits on the BQL
- the VCPU thread releases the BQL a little later
- the I/O thread raises an interrupt, which calls qemu_cpu_kick
- the VCPU thread notices the interrupt, takes the BQL to
  process it and waits on it

All this back and forth is extremely expensive, causing a 6 to 8-fold
slowdown when icount is turned on.

One may think that the issue is that the VCPU thread is too dependent
on the BQL, but then the latent bug comes in.  I first tried removing
the BQL completely from the x86 cpu_exec, only to see everything break.
The only way to fix it (and make everything slow again) was to add a dummy
BQL lock/unlock pair.

This is because in -icount mode you really have to process the events
before the CPU restarts executing the next instruction.  Therefore, this
series moves the processing of QEMU_CLOCK_VIRTUAL timers straight in
the vCPU thread when running in icount mode.

The required changes include:

- make the timer notification callback wake up TCG's single vCPU thread
  when run from another thread.  By using async_run_on_cpu, the callback
  can override all_cpu_threads_idle() when the CPU is halted.

- move handle_icount_deadline after qemu_tcg_wait_io_event, so that
  the timer notification callback is invoked after the dummy work item
  wakes up the vCPU thread

- make handle_icount_deadline run the timers instead of just waking the
  I/O thread.

- stop processing the timers in the main loop

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:51:34 +01:00
Paolo Bonzini e330c118f2 main-loop: remove now unnecessary optimization
This optimization is not necessary anymore, because the vCPU now drops
the I/O thread lock even with TCG.  Drop it to simplify the code and
avoid the "I/O thread spun for 1000 iterations" warning.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:29:21 +01:00
Paolo Bonzini 3f53bc61a4 cpus: define QEMUTimerListNotifyCB for QEMU system emulation
There is no change for now, because the callback just invokes
qemu_notify_event.

Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:28:29 +01:00
Paolo Bonzini d2528bdc19 qemu-timer: do not include sysemu/cpus.h from util/qemu-timer.h
This dependency is the wrong way, and we will need util/qemu-timer.h from
sysemu/cpus.h in the next patch.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:28:18 +01:00
Paolo Bonzini 33bef0b994 qemu-timer: fix off-by-one
If the first timer is exactly at the current value of the clock, the
deadline is met and the timer should fire.  This fixes itself on the next
iteration of the loop without icount; with icount, however, execution
of instructions will stop exactly at the deadline and won't proceed.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:42 +01:00
Paolo Bonzini c0d24e7f70 target/nios2: take BQL around interrupt check
The interrupt controller does not have its own locking.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:37 +01:00
Li Qiang b01a2d07c9 scsi: mptsas: fix the wrong reading size in fetch request
When fetching request, it should read sizeof(*hdr), not the
pointer hdr.

Signed-off-by: Li Qiang <liqiang6-s@360.cn>
Message-Id: <1489488980-130668-1-git-send-email-liqiang6-s@360.cn>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:37 +01:00
Suramya Shah bd5d983fa8 util: Removed unneeded header from path.c
Signed-off-by: Suramya Shah <shah.suramya@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20170310163948.7567-1-shah.suramya@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:37 +01:00
Lin Ma c12d66aac1 configure: add the missing help output for optional features
Signed-off-by: Lin Ma <lma@suse.com>
Message-Id: <20170310101405.26974-1-lma@suse.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:36 +01:00
Marc-André Lureau 9b4b157ef6 scripts/dump-guest-memory.py: fix int128_get64 on recent gcc
The Int128 is no longer a struct, reaching a python exception:
Python Exception <class 'gdb.error'> Attempt to extract a component of a value that is not a (null).:

Replace struct access with a cast to uint64[] instead.

Fixes:
https://bugzilla.redhat.com/show_bug.cgi?id=1427466

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170310112819.16760-1-marcandre.lureau@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:36 +01:00
Eduardo Habkost ca2edcd35c kvmclock: Don't crash QEMU if KVM is disabled
Most machines don't allow sysbus devices like "kvmclock" to be
created from the command-line, but some of them do (the ones with
has_dynamic_sysbus=true). In those cases, it's possible to
manually create a kvmclock device without KVM being enabled,
making QEMU crash:

  $ qemu-system-x86_64 -machine q35,accel=tcg -device kvmclock
  Segmentation fault (core dumped)

This changes kvmclock's realize method to return an error if KVM
is disabled, to ensure it won't crash QEMU.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20170309185046.17555-1-ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:36 +01:00
Eduardo Habkost c70b11d160 kvm: Print MSR information if KVM_{GET,SET}_MSRS failed
When a KVM_{GET,SET}_MSRS ioctl() fails, it is difficult to find
out which MSR caused the problem. Print an error message for
debugging, before we trigger the (ret == cpu->kvm_msr_buf->nmsrs)
assert.

Suggested-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20170309194634.28457-1-ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:36 +01:00
Christian Borntraeger 79ca7a1b89 exec: add cpu_synchronize_state to cpu_memory_rw_debug
I sometimes got "Cannot access memory" when using the x command
on the monitor. Turns out that the cpu env did contain stale data
(e.g. wrong control register content for page table origin).
We must synchronize the state of the CPU before walking the page
tables. A similar issues happens for a remote gdb, so lets
do the cpu_synchronize_state in cpu_memory_rw_debug.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Message-Id: <1488896348-13560-1-git-send-email-borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:36 +01:00
Jitendra Kolhe 1e356fc14b mem-prealloc: reduce large guest start-up and migration time.
Using "-mem-prealloc" option for a large guest leads to higher guest
start-up and migration time. This is because with "-mem-prealloc" option
qemu tries to map every guest page (create address translations), and
make sure the pages are available during runtime. virsh/libvirt by
default, seems to use "-mem-prealloc" option in case the guest is
configured to use huge pages. The patch tries to map all guest pages
simultaneously by spawning multiple threads. Currently limiting the
change to QEMU library functions on POSIX compliant host only, as we are
not sure if the problem exists on win32. Below are some stats with
"-mem-prealloc" option for guest configured to use huge pages.

------------------------------------------------------------------------
Idle Guest      | Start-up time | Migration time
------------------------------------------------------------------------
Guest stats with 2M HugePage usage - single threaded (existing code)
------------------------------------------------------------------------
64 Core - 4TB   | 54m11.796s    | 75m43.843s
64 Core - 1TB   | 8m56.576s     | 14m29.049s
64 Core - 256GB | 2m11.245s     | 3m26.598s
------------------------------------------------------------------------
Guest stats with 2M HugePage usage - map guest pages using 8 threads
------------------------------------------------------------------------
64 Core - 4TB   | 5m1.027s      | 34m10.565s
64 Core - 1TB   | 1m10.366s     | 8m28.188s
64 Core - 256GB | 0m19.040s     | 2m10.148s
-----------------------------------------------------------------------
Guest stats with 2M HugePage usage - map guest pages using 16 threads
-----------------------------------------------------------------------
64 Core - 4TB   | 1m58.970s     | 31m43.400s
64 Core - 1TB   | 0m39.885s     | 7m55.289s
64 Core - 256GB | 0m11.960s     | 2m0.135s
-----------------------------------------------------------------------

Changed in v2:
 - modify number of memset threads spawned to min(smp_cpus, 16).
 - removed 64GB memory restriction for spawning memset threads.

Changed in v3:
 - limit number of threads spawned based on
   min(sysconf(_SC_NPROCESSORS_ONLN), 16, smp_cpus)
 - implement memset thread specific siglongjmp in SIGBUS signal_handler.

Changed in v4
 - remove sigsetjmp/siglongjmp and SIGBUS unblock/block for main thread
   as main thread no longer touches any pages.
 - simplify code my returning memset_thread_failed status from
   touch_all_pages.

Signed-off-by: Jitendra Kolhe <jitendra.kolhe@hpe.com>
Message-Id: <1487907103-32350-1-git-send-email-jitendra.kolhe@hpe.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:36 +01:00
Thomas Huth c0d9f7d0bc docs: Add a note about mixing bootindex with "-boot order"
Occasionally the users try to mix the bootindex properties with the
"-boot order" parameter - and this likely does not give the expected
results. So let's add a proper statement that these two concepts
should not be used together.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <1488303601-23741-1-git-send-email-thuth@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:36 +01:00
Dr. David Alan Gilbert e8f5fe2de1 memory_region: Fix name comments
The 'name' parameter to memory_region_init_* had been marked as debug
only, however vmstate_region_ram uses it as a parameter to
qemu_ram_set_idstr to set RAMBlock names and these form part of the
migration stream.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <20170309152708.30635-1-dgilbert@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-03-14 13:26:36 +01:00
Andrew Jones d5affb0d86 target/arm/arm-powerctl: Fix psci info return values
The power state spec section 5.1.5 AFFINITY_INFO defines the
affinity info return values as

  0 ON
  1 OFF
  2 ON_PENDING

I grepped QEMU for power_state to ensure that no assumptions
of OFF=0 were being made.

Signed-off-by: Andrew Jones <drjones@redhat.com>
Message-id: 20170303123232.4967-1-drjones@redhat.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-14 11:28:54 +00:00
Andrew Baumann 6ecd0b6ba0 target/arm: implement armv8 PMUSERENR (user-mode enable bits)
In armv8, this register implements more than a single bit, with
fine-grained enables for read access to event counters, cycles
counters, and write access to the software increment. This change
implements those checks using custom access functions for the relevant
registers.

Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com>
Message-id: 20170228215801.10472-2-Andrew.Baumann@microsoft.com
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
[PMM: move a couple of access functions to be only compiled
 ifndef CONFIG_USER_ONLY to avoid compiler warnings]
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-14 11:28:54 +00:00
Peter Maydell 591bce29b1 -----BEGIN PGP SIGNATURE-----
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Merge remote-tracking branch 'remotes/jasowang/tags/net-pull-request' into staging

# gpg: Signature made Tue 14 Mar 2017 07:55:01 GMT
# gpg:                using RSA key 0xEF04965B398D6211
# gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 215D 46F4 8246 689E C77F  3562 EF04 965B 398D 6211

* remotes/jasowang/tags/net-pull-request:
  hw/net: implement MIB counters in mcf_fec driver
  COLO-compare: Fix trace_event print bug
  e1000e: correctly tear down MSI-X memory regions

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-14 11:15:00 +00:00
Peter Maydell 94b5d57d2f ppc patch queue for 2017-03-14
This set has a handful og bugfixes to go into qemu-2.9.  This includes
 an update to the dtc/libfdt submodule which will fix the build errors
 seen on some distributions.
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 -----END PGP SIGNATURE-----

Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-2.9-20170314' into staging

ppc patch queue for 2017-03-14

This set has a handful og bugfixes to go into qemu-2.9.  This includes
an update to the dtc/libfdt submodule which will fix the build errors
seen on some distributions.

# gpg: Signature made Tue 14 Mar 2017 04:00:41 GMT
# gpg:                using RSA key 0x6C38CACA20D9B392
# gpg: Good signature from "David Gibson <david@gibson.dropbear.id.au>"
# gpg:                 aka "David Gibson (Red Hat) <dgibson@redhat.com>"
# gpg:                 aka "David Gibson (ozlabs.org) <dgibson@ozlabs.org>"
# gpg:                 aka "David Gibson (kernel.org) <dwg@kernel.org>"
# Primary key fingerprint: 75F4 6586 AE61 A66C C44E  87DC 6C38 CACA 20D9 B392

* remotes/dgibson/tags/ppc-for-2.9-20170314:
  dtc: Update submodule to avoid build errors
  pseries: Don't expose PCIe extended config space on older machine types
  target/ppc: fix cpu_ov setting for 32-bit
  target/ppc: Fix wrong number of UAMR register

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-03-14 10:13:19 +00:00