Commit Graph

5624 Commits

Author SHA1 Message Date
BALATON Zoltan
efae27848d sm501: Add emulation of chip connected via PCI
Only the display controller part is created automatically on PCI

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Aurelien Jarno <aurelien@aurel32.net>
Message-id: 647d292c6f5abba8b2a614687229949b5dcb864e.1492787889.git.balaton@eik.bme.hu
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-04-24 12:32:12 +01:00
BALATON Zoltan
ca8a110470 sm501: QOMify
Adding vmstate saving is not in this patch because the state structure
will be changed in further patches, then another patch will add
vmstate descriptor after those changes.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Aurelien Jarno <aurelien@aurel32.net>
Message-id: a32b7fc981a20205f96d530d8e958f12ace1104c.1492787889.git.balaton@eik.bme.hu
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-04-24 12:32:12 +01:00
Peter Maydell
32c7e0ab75 migration/next for 20170421
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Merge remote-tracking branch 'remotes/juanquintela/tags/migration/20170421' into staging

migration/next for 20170421

# gpg: Signature made Fri 21 Apr 2017 11:28:13 BST
# gpg:                using RSA key 0xF487EF185872D723
# gpg: Good signature from "Juan Quintela <quintela@redhat.com>"
# gpg:                 aka "Juan Quintela <quintela@trasno.org>"
# Primary key fingerprint: 1899 FF8E DEBF 58CC EE03  4B82 F487 EF18 5872 D723

* remotes/juanquintela/tags/migration/20170421: (65 commits)
  hmp: info migrate_parameters format tunes
  hmp: info migrate_capability format tunes
  migration: rename max_size to threshold_size
  migration: set current_active_state once
  virtio-rng: stop virtqueue while the CPU is stopped
  migration: don't close a file descriptor while it can be in use
  ram: Remove migration_bitmap_extend()
  migration: Disable hotplug/unplug during migration
  qdev: Move qdev_unplug() to qdev-monitor.c
  qdev: Export qdev_hot_removed
  qdev: qdev_hotplug is really a bool
  migration: Remove MigrationState parameter from migration_is_idle()
  ram: Use RAMBitmap type for coherence
  ram: rename last_ram_offset() last_ram_pages()
  ram: Use ramblock and page offset instead of absolute offset
  ram: Change offset field in PageSearchStatus to page
  ram: Remember last_page instead of last_offset
  ram: Use page number instead of an address for the bitmap operations
  ram: reorganize last_sent_block
  ram: ram_discard_range() don't use the mis parameter
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-04-21 15:59:27 +01:00
Peter Maydell
b4c963fa82 The first batch of s390x changes for 2.10:
- the new compat machine
 - several cleanups and optimizations
 - introspection for css ids
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Merge remote-tracking branch 'remotes/cohuck/tags/s390x-20170421' into staging

The first batch of s390x changes for 2.10:
- the new compat machine
- several cleanups and optimizations
- introspection for css ids

# gpg: Signature made Fri 21 Apr 2017 08:36:25 BST
# gpg:                using RSA key 0xDECF6B93C6F02FAF
# gpg: Good signature from "Cornelia Huck <huckc@linux.vnet.ibm.com>"
# gpg:                 aka "Cornelia Huck <cornelia.huck@de.ibm.com>"
# Primary key fingerprint: C3D0 D66D C362 4FF6 A8C0  18CE DECF 6B93 C6F0 2FAF

* remotes/cohuck/tags/s390x-20170421:
  s390x: Drop useless casts
  s390x: register I/O adapters per ISC during init
  s390x/flic: cache flic in s390_get_flic
  s390x: initialize flic before I/O subsystems
  s390x: use enum for adapter type and standardize its naming
  s390x/css: consolidate the devno property for ccw devices
  s390x/css: provide introspection for virtual subchannel and device busid
  s390x/css: introduce read-only property type for device ids
  s390x/pci: make printf always compile in debug output
  s390x/kvm: make printf always compile in debug output
  s390x: introduce 2.10 compat machine

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-04-21 12:59:42 +01:00
Peter Maydell
bfec359afb qdev patches for 2017-04-21
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Merge remote-tracking branch 'remotes/armbru/tags/pull-qdev-2017-04-21' into staging

qdev patches for 2017-04-21

# gpg: Signature made Fri 21 Apr 2017 06:37:19 BST
# 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-qdev-2017-04-21:
  qdev: remove cannot_destroy_with_object_finalize_yet
  versatile: remove cannot_destroy_with_object_finalize_yet
  ppc: remove cannot_destroy_with_object_finalize_yet
  arm: remove remaining cannot_destroy_with_object_finalize_yet

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-04-21 11:42:03 +01:00
Peter Xu
faec066ab8 migration: rename max_size to threshold_size
In migration codes (especially in migration_thread()), max_size is used
in many place for the threshold value that we will start to do the final
flush and jump to the next stage to dump the whole rest things to
destination. However its name is confusing to first readers. Let's
rename it to "threshold_size" when proper and add a comment for it. No
functional change is made.

CC: Juan Quintela <quintela@redhat.com>
CC: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2017-04-21 12:25:41 +02:00
Laurent Vivier
a23a6d1839 virtio-rng: stop virtqueue while the CPU is stopped
If we modify the virtio-rng virqueue while the
vmstate is already migrated we can have some
inconsistencies between the virtqueue state and
the memory content.

To avoid this, stop the virtqueue while the CPU
is stopped.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Reviewed-by:  Amit Shah <amit@kernel.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2017-04-21 12:25:40 +02:00
Juan Quintela
66103a5796 ram: Remove migration_bitmap_extend()
We have disabled memory hotplug, so we don't need to handle
migration_bitamp there.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
2017-04-21 12:25:40 +02:00
Juan Quintela
21def24a5a qdev: Export qdev_hot_removed
I need to move qdev_unplug to qdev-monitor in the following patch, and
it needs access to this variable.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
2017-04-21 12:25:40 +02:00
Juan Quintela
9bed84c191 qdev: qdev_hotplug is really a bool
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
2017-04-21 12:25:40 +02:00
Juan Quintela
fab3500526 migration: Remove MigrationState parameter from migration_is_idle()
Only user don't have a MigrationState handly.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-04-21 12:25:40 +02:00
Juan Quintela
b8c4899398 ram: rename last_ram_offset() last_ram_pages()
We always use it as pages anyways.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-04-21 12:25:40 +02:00
Juan Quintela
aaa2064c2a ram: ram_discard_range() don't use the mis parameter
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
2017-04-21 12:25:39 +02:00
Juan Quintela
15440dd5a0 ram: Pass RAMBlock to bitmap_sync
We change the meaning of start to be the offset from the beggining of
the block.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-04-21 12:25:39 +02:00
Juan Quintela
20afaed98b ram: Rename qemu_target_page_bits() to qemu_target_page_size()
It was used as a size in all cases except one.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-04-21 12:25:39 +02:00
Juan Quintela
5727309d25 migration: Remove MigrationState from migration_in_postcopy
We need to call for the migrate_get_current() in more that half of the
uses, so call that inside.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
2017-04-21 12:25:39 +02:00
Juan Quintela
96506894a3 ram: Move postcopy_requests into RAMState
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
2017-04-21 12:25:38 +02:00
Juan Quintela
47ad861976 ram: Move dirty_pages_rate to RAMState
Treat it like the rest of ram stats counters.  Export its value the
same way.  As an added bonus, no more MigrationState used in
migration_bitmap_sync();

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

--

Again, dave was the one reviewing it
2017-04-21 12:25:38 +02:00
Juan Quintela
abbf1d7f9b ram: Remove dirty_bytes_rate
It can be recalculated from dirty_pages_rate.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>

--

Dave was the one that reviewed it O:-)
2017-04-21 12:25:38 +02:00
Juan Quintela
42d219d3b0 ram: Create ram_dirty_sync_count()
This is a ram field that was inside MigrationState.  Move it to
RAMState and make it the same that the other ram stats.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
2017-04-21 12:25:37 +02:00
Juan Quintela
ec481c6c57 ram: Move src_page_req* to RAMState
This are the last postcopy fields still at MigrationState.  Once there
Move MigrationSrcPageRequest to ram.c and remove MigrationState
parameters where appropiate.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
2017-04-21 12:25:37 +02:00
Juan Quintela
68a098f386 ram: Move last_req_rb to RAMState
It was on MigrationState when it is only used inside ram.c for
postcopy.  Problem is that we need to access it without being able to
pass it RAMState directly.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
2017-04-21 12:25:37 +02:00
Juan Quintela
29cc3d8a9b ram: Remove norm_mig_bytes_transferred
Its value can be calculated by other exported.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2017-04-21 12:25:36 +02:00
Juan Quintela
bedf53c14c ram: Remove unused pages_skipped variable
For compatibility, we need to still send a value, but just specify it
and comment the fact.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
2017-04-21 12:25:36 +02:00
Juan Quintela
5bb1272c38 ram: Remove unused dup_mig_bytes_transferred()
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
2017-04-21 12:25:36 +02:00
Juan Quintela
68908ed665 ram: Change num_dirty_pages_period type to uint64_t
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
2017-04-21 12:25:36 +02:00
Juan Quintela
5e58f968f4 ram: Rename flush_page_queue() to migration_page_queue_free()
It reflects better what it does.

Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
2017-04-21 12:25:35 +02:00
Peter Maydell
7cd37925a1 Machine queue for 2.10
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Merge remote-tracking branch 'remotes/ehabkost/tags/machine-pull-request' into staging

Machine queue for 2.10

# gpg: Signature made Thu 20 Apr 2017 19:44:27 BST
# 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:
  qdev: Constify local variable returned by blk_bs
  qdev: Constify value passed to qdev_prop_set_macaddr
  hostmem: use host_memory_backend_mr_inited() where proper
  hostmem: introduce host_memory_backend_mr_inited()
  hw/core/null-machine: Print error message when using the -kernel parameter
  qdev: Make "hotplugged" property read-only
  intel_iommu: enable remote IOTLB
  intel_iommu: allow dynamic switch of IOMMU region
  intel_iommu: provide its own replay() callback
  intel_iommu: use the correct memory region for device IOTLB notification
  memory: add MemoryRegionIOMMUOps.replay() callback
  memory: introduce memory_region_notify_one()
  memory: provide iommu_replay_all()
  memory: provide IOMMU_NOTIFIER_FOREACH macro
  memory: add section range info for IOMMU notifier

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-04-21 10:23:56 +01:00
Fei Li
dde522bbc5 s390x: register I/O adapters per ISC during init
The I/O adapters should exist as soon as the bus/infrastructure
exists, and not only when the guest is actually trying to do something
with them. While the lazy allocation was not wrong, allocating at init
time is cleaner, both for the architecture and the code. Let's adjust
this by having each device type (currently for PCI and virtio-ccw)
register the adapters for each ISC (as now we don't know which ISC the
guest will use) as soon as it initializes.

Use a two-dimensional array io_adapters[type][isc] to store adapters
in ChannelSubSys, so that we can conveniently get the adapter id by
the helper function css_get_adapter_id(type, isc).

Signed-off-by: Fei Li <sherrylf@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-04-21 09:32:09 +02:00
Fei Li
5b00bef270 s390x: use enum for adapter type and standardize its naming
Let's use an enum for io adapter type, and standardize its naming to
CSS_IO_ADAPTER_* by changing S390_PCIPT_ADAPTER to CSS_IO_ADAPTER_PCI.

Signed-off-by: Fei Li <sherrylf@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-04-21 09:32:09 +02:00
Dong Jia Shi
c35fc6aa18 s390x/css: introduce read-only property type for device ids
Let's introduce a read-only property type that handles device ids of the
CssDevId type used for channel devices for future use. e.g. exposing the
busid of an I/O subchannel that is assigned to a ccw device.

Signed-off-by: Dong Jia Shi <bjsdjshi@linux.vnet.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-04-21 09:32:09 +02:00
Cornelia Huck
10890873ca s390x: introduce 2.10 compat machine
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
2017-04-21 09:32:09 +02:00
Laurent Vivier
08f00df4f4 qdev: remove cannot_destroy_with_object_finalize_yet
As all users have been removed, we can remove
cannot_destroy_with_object_finalize_yet field
from the DeviceClass structure.

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Message-Id: <20170414083717.13641-5-lvivier@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
2017-04-21 07:18:34 +02:00
Krzysztof Kozlowski
606fd0e206 qdev: Constify value passed to qdev_prop_set_macaddr
The 'value' argument is not modified so this can be made const for code
safeness.

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Message-Id: <20170310200550.13313-2-krzk@kernel.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20 15:22:41 -03:00
Peter Xu
4728b57410 hostmem: introduce host_memory_backend_mr_inited()
We were checking this against memory region size of host memory
backend's mr field to see whether the mr has been inited. This is
efficient but less elegant. Let's make a helper for it to avoid
confusions, along with some notes.

Suggested-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1489151370-15453-2-git-send-email-peterx@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20 15:22:41 -03:00
Peter Xu
dd4d607e40 intel_iommu: enable remote IOTLB
This patch is based on Aviv Ben-David (<bd.aviv@gmail.com>)'s patch
upstream:

  "IOMMU: enable intel_iommu map and unmap notifiers"
  https://lists.gnu.org/archive/html/qemu-devel/2016-11/msg01453.html

However I removed/fixed some content, and added my own codes.

Instead of translate() every page for iotlb invalidations (which is
slower), we walk the pages when needed and notify in a hook function.

This patch enables vfio devices for VT-d emulation.

And, since we already have vhost DMAR support via device-iotlb, a
natural benefit that this patch brings is that vt-d enabled vhost can
live even without ATS capability now. Though more tests are needed.

Signed-off-by: Aviv Ben-David <bdaviv@cs.technion.ac.il>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-10-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20 15:22:41 -03:00
Peter Xu
558e0024a4 intel_iommu: allow dynamic switch of IOMMU region
This is preparation work to finally enabled dynamic switching ON/OFF for
VT-d protection. The old VT-d codes is using static IOMMU address space,
and that won't satisfy vfio-pci device listeners.

Let me explain.

vfio-pci devices depend on the memory region listener and IOMMU replay
mechanism to make sure the device mapping is coherent with the guest
even if there are domain switches. And there are two kinds of domain
switches:

  (1) switch from domain A -> B
  (2) switch from domain A -> no domain (e.g., turn DMAR off)

Case (1) is handled by the context entry invalidation handling by the
VT-d replay logic. What the replay function should do here is to replay
the existing page mappings in domain B.

However for case (2), we don't want to replay any domain mappings - we
just need the default GPA->HPA mappings (the address_space_memory
mapping). And this patch helps on case (2) to build up the mapping
automatically by leveraging the vfio-pci memory listeners.

Another important thing that this patch does is to seperate
IR (Interrupt Remapping) from DMAR (DMA Remapping). IR region should not
depend on the DMAR region (like before this patch). It should be a
standalone region, and it should be able to be activated without
DMAR (which is a common behavior of Linux kernel - by default it enables
IR while disabled DMAR).

Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-9-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20 15:22:41 -03:00
Peter Xu
f06a696dc9 intel_iommu: provide its own replay() callback
The default replay() don't work for VT-d since vt-d will have a huge
default memory region which covers address range 0-(2^64-1). This will
normally consumes a lot of time (which looks like a dead loop).

The solution is simple - we don't walk over all the regions. Instead, we
jump over the regions when we found that the page directories are empty.
It'll greatly reduce the time to walk the whole region.

To achieve this, we provided a page walk helper to do that, invoking
corresponding hook function when we found an page we are interested in.
vtd_page_walk_level() is the core logic for the page walking. It's
interface is designed to suite further use case, e.g., to invalidate a
range of addresses.

Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-8-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20 15:22:41 -03:00
Peter Xu
faa362e3cc memory: add MemoryRegionIOMMUOps.replay() callback
Originally we have one memory_region_iommu_replay() function, which is
the default behavior to replay the translations of the whole IOMMU
region. However, on some platform like x86, we may want our own replay
logic for IOMMU regions. This patch adds one more hook for IOMMUOps for
the callback, and it'll override the default if set.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-6-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20 15:22:41 -03:00
Peter Xu
bd2bfa4c52 memory: introduce memory_region_notify_one()
Generalizing the notify logic in memory_region_notify_iommu() into a
single function. This can be further used in customized replay()
functions for IOMMUs.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-5-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20 15:22:41 -03:00
Peter Xu
de472e4a92 memory: provide iommu_replay_all()
This is an "global" version of existing memory_region_iommu_replay() -
we announce the translations to all the registered notifiers, instead of
a specific one.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-4-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20 15:22:41 -03:00
Peter Xu
512fa40867 memory: provide IOMMU_NOTIFIER_FOREACH macro
A new macro is provided to iterate all the IOMMU notifiers hooked
under specific IOMMU memory region.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: \"Michael S. Tsirkin\" <mst@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-3-git-send-email-peterx@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20 15:22:41 -03:00
Peter Xu
698feb5e13 memory: add section range info for IOMMU notifier
In this patch, IOMMUNotifier.{start|end} are introduced to store section
information for a specific notifier. When notification occurs, we not
only check the notification type (MAP|UNMAP), but also check whether the
notified iova range overlaps with the range of specific IOMMU notifier,
and skip those notifiers if not in the listened range.

When removing an region, we need to make sure we removed the correct
VFIOGuestIOMMU by checking the IOMMUNotifier.start address as well.

This patch is solving the problem that vfio-pci devices receive
duplicated UNMAP notification on x86 platform when vIOMMU is there. The
issue is that x86 IOMMU has a (0, 2^64-1) IOMMU region, which is
splitted by the (0xfee00000, 0xfeefffff) IRQ region. AFAIK
this (splitted IOMMU region) is only happening on x86.

This patch also helps vhost to leverage the new interface as well, so
that vhost won't get duplicated cache flushes. In that sense, it's an
slight performance improvement.

Suggested-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <1491562755-23867-2-git-send-email-peterx@redhat.com>
[ehabkost: included extra vhost_iommu_region_del() change from Peter Xu]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2017-04-20 15:22:41 -03:00
Peter Maydell
fa54abb8c2 Drop QEMU_GNUC_PREREQ() checks for gcc older than 4.1
We already require gcc 4.1 or newer (for the atomic
support), so the fallback codepaths for older gcc
versions than that are now dead code and we can
just delete them.

NB: clang reports itself as gcc 4.2 (regardless of
clang version), so clang won't be using the fallbacks
either.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
2017-04-20 18:33:33 +01:00
Alistair Francis
a5517666b2 cadence_gem: Make the revision a property
Expose the Cadence GEM revision as a property.

Signed-off-by: Alistair Francis <alistair.francis@xilinx.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 541324373cf87b50f8be0439a0cb89f5028b016f.1491947224.git.alistair.francis@xilinx.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2017-04-20 17:39:17 +01:00
Fam Zheng
91af091f92 block: Drain BH in bdrv_drained_begin
During block job completion, nothing is preventing
block_job_defer_to_main_loop_bh from being called in a nested
aio_poll(), which is a trouble, such as in this code path:

    qmp_block_commit
      commit_active_start
        bdrv_reopen
          bdrv_reopen_multiple
            bdrv_reopen_prepare
              bdrv_flush
                aio_poll
                  aio_bh_poll
                    aio_bh_call
                      block_job_defer_to_main_loop_bh
                        stream_complete
                          bdrv_reopen

block_job_defer_to_main_loop_bh is the last step of the stream job,
which should have been "paused" by the bdrv_drained_begin/end in
bdrv_reopen_multiple, but it is not done because it's in the form of a
main loop BH.

Similar to why block jobs should be paused between drained_begin and
drained_end, BHs they schedule must be excluded as well.  To achieve
this, this patch forces draining the BH in BDRV_POLL_WHILE.

As a side effect this fixes a hang in block_job_detach_aio_context
during system_reset when a block job is ready:

    #0  0x0000555555aa79f3 in bdrv_drain_recurse
    #1  0x0000555555aa825d in bdrv_drained_begin
    #2  0x0000555555aa8449 in bdrv_drain
    #3  0x0000555555a9c356 in blk_drain
    #4  0x0000555555aa3cfd in mirror_drain
    #5  0x0000555555a66e11 in block_job_detach_aio_context
    #6  0x0000555555a62f4d in bdrv_detach_aio_context
    #7  0x0000555555a63116 in bdrv_set_aio_context
    #8  0x0000555555a9d326 in blk_set_aio_context
    #9  0x00005555557e38da in virtio_blk_data_plane_stop
    #10 0x00005555559f9d5f in virtio_bus_stop_ioeventfd
    #11 0x00005555559fa49b in virtio_bus_stop_ioeventfd
    #12 0x00005555559f6a18 in virtio_pci_stop_ioeventfd
    #13 0x00005555559f6a18 in virtio_pci_reset
    #14 0x00005555559139a9 in qdev_reset_one
    #15 0x0000555555916738 in qbus_walk_children
    #16 0x0000555555913318 in qdev_walk_children
    #17 0x0000555555916738 in qbus_walk_children
    #18 0x00005555559168ca in qemu_devices_reset
    #19 0x000055555581fcbb in pc_machine_reset
    #20 0x00005555558a4d96 in qemu_system_reset
    #21 0x000055555577157a in main_loop_should_exit
    #22 0x000055555577157a in main_loop
    #23 0x000055555577157a in main

The rationale is that the loop in block_job_detach_aio_context cannot
make any progress in pausing/completing the job, because bs->in_flight
is 0, so bdrv_drain doesn't process the block_job_defer_to_main_loop
BH. With this patch, it does.

Reported-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
Message-Id: <20170418143044.12187-3-famz@redhat.com>
Reviewed-by: Jeff Cody <jcody@redhat.com>
Tested-by: Jeff Cody <jcody@redhat.com>
Signed-off-by: Fam Zheng <famz@redhat.com>
2017-04-18 22:56:28 +08:00
Fam Zheng
052a75721f block: Introduce bdrv_coroutine_enter
Signed-off-by: Fam Zheng <famz@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2017-04-11 20:07:15 +08:00
Fam Zheng
8865852e00 async: Introduce aio_co_enter
They start the coroutine on the specified context.

Signed-off-by: Fam Zheng <famz@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2017-04-11 20:07:15 +08:00
Fam Zheng
ba9e75ceef coroutine: Extract qemu_aio_coroutine_enter
It's a variant of qemu_coroutine_enter with an explicit AioContext
parameter.

Signed-off-by: Fam Zheng <famz@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2017-04-11 20:07:15 +08:00
Fam Zheng
14e9559f46 block: Make bdrv_parent_drained_begin/end public
Signed-off-by: Fam Zheng <famz@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
2017-04-11 20:07:15 +08:00