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2020-02-27virtio-iommu: Implement fault reportingEric Auger
The event queue allows to report asynchronous errors. The translate function now injects faults when relevant. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <20200214132745.23392-7-eric.auger@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-02-27virtio-iommu: Implement translateEric Auger
This patch implements the translate callback Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <20200214132745.23392-6-eric.auger@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-02-27virtio-iommu: Implement map/unmapEric Auger
This patch implements virtio_iommu_map/unmap. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <20200214132745.23392-5-eric.auger@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-02-27virtio-iommu: Implement attach/detach commandEric Auger
This patch implements the endpoint attach/detach to/from a domain. Domain and endpoint internal datatypes are introduced. Both are stored in RB trees. The domain owns a list of endpoints attached to it. Also helpers to get/put end points and domains are introduced. As for the IOMMU memory regions, a callback is called on PCI bus enumeration that initializes for a given device on the bus hierarchy an IOMMU memory region. The PCI bus hierarchy is stored locally in IOMMUPciBus and IOMMUDevice objects. At the time of the enumeration, the bus number may not be computed yet. So operations that will need to retrieve the IOMMUdevice and its IOMMU memory region from the bus number and devfn, once the bus number is garanteed to be frozen, use an array of IOMMUPciBus, lazily populated. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <20200214132745.23392-4-eric.auger@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-02-27virtio-iommu: Decode the command payloadEric Auger
This patch adds the command payload decoding and introduces the functions that will do the actual command handling. Those functions are not yet implemented. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <20200214132745.23392-3-eric.auger@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-02-27virtio-iommu: Add skeletonEric Auger
This patchs adds the skeleton for the virtio-iommu device. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Message-Id: <20200214132745.23392-2-eric.auger@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2019-05-22hw/virtio/virtio-mmio: Convert DPRINTF to trace and logBoxuan Li
Use traces for debug message and qemu_log_mask for errors. Signed-off-by: Boxuan Li <liboxuan@connect.hku.hk> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Yuval Shaia <yuval.shaia@oracle.com> Message-Id: <20190503154424.73933-1-liboxuan@connect.hku.hk> Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2019-03-22trace-events: Shorten file names in commentsMarkus Armbruster
We spell out sub/dir/ in sub/dir/trace-events' comments pointing to source files. That's because when trace-events got split up, the comments were moved verbatim. Delete the sub/dir/ part from these comments. Gets rid of several misspellings. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20190314180929.27722-3-armbru@redhat.com Message-Id: <20190314180929.27722-3-armbru@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2018-05-23vhost: add trace for IOTLB missPeter Xu
Add some trace points for IOTLB translation for vhost. After vhost-user is setup, the only IO path that QEMU will participate should be the IOMMU translation, so it'll be good we can track this with explicit timestamps when needed to see how long time we take to do the translation, and whether there's anything stuck inside. It might be useful for triaging vhost-user problems. Signed-off-by: Peter Xu <peterx@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20vhost: Huge page align and mergeDr. David Alan Gilbert
Align RAMBlocks to page size alignment, and adjust the merging code to deal with partial overlap due to that alignment. This is needed for postcopy so that we can place/fetch whole hugepages when under userfault. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20vhost+postcopy: Wire up POSTCOPY_END notifyDr. David Alan Gilbert
Wire up a call to VHOST_USER_POSTCOPY_END message to the vhost clients right before we ask the listener thread to shutdown. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20vhost+postcopy: Add vhost wakerDr. David Alan Gilbert
Register a waker function in vhost-user code to be notified when pages arrive or requests to previously mapped pages get requested. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20vhost+postcopy: Resolve client addressDr. David Alan Gilbert
Resolve fault addresses read off the clients UFD into RAMBlock and offset, and call back to the postcopy code to ask for the page. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20vhost+postcopy: Stash RAMBlock and offsetDr. David Alan Gilbert
Stash the RAMBlock and offset for later use looking up addresses. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20vhost+postcopy: Send address back to qemuDr. David Alan Gilbert
We need a better way, but at the moment we need the address of the mappings sent back to qemu so it can interpret the messages on the userfaultfd it reads. This is done as a 3 stage set: QEMU -> client set_mem_table mmap stuff, get addresses client -> qemu here are the addresses qemu -> client OK - now you can use them That ensures that qemu has registered the new addresses in it's userfault code before the client starts accessing them. Note: We don't ask for the default 'ack' reply since we've got our own. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-03-20vhost+postcopy: Transmit 'listen' to slaveDr. David Alan Gilbert
Notify the vhost-user slave on reception of the 'postcopy-listen' event from the source. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-02-08vhost: Move log_dirty checkDr. David Alan Gilbert
Move the log_dirty check into vhost_section. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-02-08vhost: Regenerate region list from changed sections listDr. David Alan Gilbert
Compare the sections list that's just been generated, and if it's different from the old one regenerate the region list. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com>
2018-02-08vhost: Merge sections added to temporary listDr. David Alan Gilbert
As sections are reported by the listener to the _nop and _add methods, add them to the temporary section list but now merge them with the previous section if the new one abuts and the backend allows. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Reviewed-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-02-08Revert "vhost: add traces for memory listeners"Michael S. Tsirkin
This reverts commit 0750b060216de69ed1f14bc08181bf4ad27fc622. Follow up patches are reworking the memory listeners, the new mechanism will add its own set of traces. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-02-07vhost: add traces for memory listenersPeter Xu
Trace these operations on two memory listeners. It helps to verify the new memory listener fix, and good to keep them there. Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20180122060244.29368-2-peterx@redhat.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2017-08-01trace-events: fix code style: print 0x before hex numbersVladimir Sementsov-Ogievskiy
The only exception are groups of numers separated by symbols '.', ' ', ':', '/', like 'ab.09.7d'. This patch is made by the following: > find . -name trace-events | xargs python script.py where script.py is the following python script: ========================= #!/usr/bin/env python import sys import re import fileinput rhex = '%[-+ *.0-9]*(?:[hljztL]|ll|hh)?(?:x|X|"\s*PRI[xX][^"]*"?)' rgroup = re.compile('((?:' + rhex + '[.:/ ])+' + rhex + ')') rbad = re.compile('(?<!0x)' + rhex) files = sys.argv[1:] for fname in files: for line in fileinput.input(fname, inplace=True): arr = re.split(rgroup, line) for i in range(0, len(arr), 2): arr[i] = re.sub(rbad, '0x\g<0>', arr[i]) sys.stdout.write(''.join(arr)) ========================= Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Acked-by: Cornelia Huck <cohuck@redhat.com> Message-id: 20170731160135.12101-5-vsementsov@virtuozzo.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2017-07-31docs: fix broken paths to docs/devel/tracing.txtPhilippe Mathieu-Daudé
With the move of some docs/ to docs/devel/ on ac06724a71, no references were updated. Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
2017-06-02virtio: add virtqueue_alloc_element tracepointPaolo Bonzini
This tracepoint can help diagnosing failures due to memory fragmentation in the guest. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2017-04-21virtio-rng: stop virtqueue while the CPU is stoppedLaurent Vivier
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>
2017-01-10balloon: Don't balloon romsDr. David Alan Gilbert
A broken guest can specify physical addresses that correspond to any memory region, but it shouldn't be able to change ROM. Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Cc: qemu-stable@nongnu.org Acked-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-11-18virtio: set ISR on dataplane notificationsPaolo Bonzini
Dataplane has been omitting forever the step of setting ISR when an interrupt is raised. This caused little breakage, because the specification actually says that ISR may not be updated in MSI mode. Some versions of the Windows drivers however didn't clear MSI mode correctly, and proceeded using polling mode (using ISR, not the used ring index!) for crashdump and hibernation. If it were just crashdump and hibernation it would not be a big deal, but recent releases of Windows do not really shut down, but rather log out and hibernate to make the next startup faster. Hence, this manifested as a more serious hang during shutdown with e.g. Windows 8.1 and virtio-win 1.8.0 RPMs. Newer versions fixed this, while older versions do not use MSI at all. The failure has always been there for virtio dataplane, but it became visible after commits 9ffe337 ("virtio-blk: always use dataplane path if ioeventfd is active", 2016-10-30) and ad07cd6 ("virtio-scsi: always use dataplane path if ioeventfd is active", 2016-10-30) made virtio-blk and virtio-scsi always use the dataplane code under KVM. The good news therefore is that it was not a bug in the patches---they were doing exactly what they were meant for, i.e. shake out remaining dataplane bugs. The fix is not hard, so it's worth arranging for the broken drivers. The virtio_should_notify+event_notifier_set pair that is common to virtio-blk and virtio-scsi dataplane is replaced with a new public function virtio_notify_irqfd that also sets ISR. The irqfd emulation code now need not set ISR anymore, so virtio_irq is removed. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Tested-by: Farhan Ali <alifm@linux.vnet.ibm.com> Tested-by: Alex Williamson <alex.williamson@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2016-09-28trace: move hw/virtio/virtio-balloon.c trace points into correct fileDaniel P. Berrange
The trace points for hw/virtio/virtio-balloon.c were mistakenly put in the top level trace-events file, instead of util/trace-events in commit 270ab88f7c1112389a02cee0e3e03b20fcc7547e Author: Daniel P. Berrange <berrange@redhat.com> Date: Thu Jun 16 09:39:57 2016 +0100 trace: split out trace events for hw/virtio/ directory Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Message-id: 1473872624-23285-5-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-08-12trace-events: fix first line comment in trace-eventsLaurent Vivier
Documentation is docs/tracing.txt instead of docs/trace-events.txt. find . -name trace-events -exec \ sed -i "s?See docs/trace-events.txt for syntax documentation.?See docs/tracing.txt for syntax documentation.?" \ {} \; Signed-off-by: Laurent Vivier <lvivier@redhat.com> Message-id: 1470669081-17860-1-git-send-email-lvivier@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-06-20trace: split out trace events for hw/virtio/ directoryDaniel P. Berrange
Move all trace-events for files in the hw/virtio/ directory to their own file. Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Message-id: 1466066426-16657-12-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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