Commit Graph

1571 Commits

Author SHA1 Message Date
Stefan Hajnoczi
03d7162a21 virtio: do not set is_external=true on host notifiers
Host notifiers can now use is_external=false since virtio-blk and
virtio-scsi no longer rely on is_external=true for drained sections.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230516190238.8401-20-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-05-30 17:32:03 +02:00
Stefan Hajnoczi
bd58ab40c3 virtio: make it possible to detach host notifier from any thread
virtio_queue_aio_detach_host_notifier() does two things:
1. It removes the fd handler from the event loop.
2. It processes the virtqueue one last time.

The first step can be peformed by any thread and without taking the
AioContext lock.

The second step may need the AioContext lock (depending on the device
implementation) and runs in the thread where request processing takes
place. virtio-blk and virtio-scsi therefore call
virtio_queue_aio_detach_host_notifier() from a BH that is scheduled in
AioContext.

The next patch will introduce a .drained_begin() function that needs to
call virtio_queue_aio_detach_host_notifier(). .drained_begin() functions
cannot call aio_poll() to wait synchronously for the BH. It is possible
for a .drained_poll() callback to asynchronously wait for the BH, but
that is more complex than necessary here.

Move the virtqueue processing out to the callers of
virtio_queue_aio_detach_host_notifier() so that the function can be
called from any thread. This is in preparation for the next patch.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230516190238.8401-17-stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-05-30 17:32:02 +02:00
Sergio Lopez
4b2321c966 virtio-input-pci: add virtio-multitouch-pci
Add virtio-multitouch-pci, a Multitouch-capable input device, to the
list of devices that can be provided by virtio-input-pci.

Signed-off-by: Sergio Lopez <slp@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230526112925.38794-5-slp@redhat.com>
2023-05-28 13:08:25 +04:00
Paolo Bonzini
0bfd14149b virtio: qmp: fix memory leak
The VirtioInfoList is already allocated by QAPI_LIST_PREPEND and
need not be allocated by the caller.

Fixes Coverity CID 1508724.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2023-05-26 12:34:17 +02:00
Alexander Graf
4b870dc4d0 hostmem-file: add offset option
Add an option for hostmem-file to start the memory object at an offset
into the target file. This is useful if multiple memory objects reside
inside the same target file, such as a device node.

In particular, it's useful to map guest memory directly into /dev/mem
for experimentation.

To make this work consistently, also fix up all places in QEMU that
expect fd offsets to be 0.

Signed-off-by: Alexander Graf <graf@amazon.com>
Message-Id: <20230403221421.60877-1-graf@amazon.com>
Acked-by: Markus Armbruster <armbru@redhat.com>
Acked-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
2023-05-23 16:47:03 +02:00
Viktor Prutyanov
206e91d143 virtio-pci: add handling of PCI ATS and Device-TLB enable/disable
According to PCIe Address Translation Services specification 5.1.3.,
ATS Control Register has Enable bit to enable/disable ATS. Guest may
enable/disable PCI ATS and, accordingly, Device-TLB for the VirtIO PCI
device. So, raise/lower a flag and call a trigger function to pass this
event to a device implementation.

Signed-off-by: Viktor Prutyanov <viktor@daynix.com>
Message-Id: <20230512135122.70403-2-viktor@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-05-19 10:30:46 -04:00
Cindy Lu
bc7b0cac7b vhost-vdpa: Add support for vIOMMU.
1. The vIOMMU support will make vDPA can work in IOMMU mode. This
will fix security issues while using the no-IOMMU mode.
To support this feature we need to add new functions for IOMMU MR adds and
deletes.

Also since the SVQ does not support vIOMMU yet, add the check for IOMMU
in vhost_vdpa_dev_start, if the SVQ and IOMMU enable at the same time
the function will return fail.

2. Skip the iova_max check vhost_vdpa_listener_skipped_section(). While
MR is IOMMU, move this check to vhost_vdpa_iommu_map_notify()

Verified in vp_vdpa and vdpa_sim_net driver

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20230510054631.2951812-5-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-05-19 10:30:46 -04:00
Cindy Lu
2fbef6aad8 vhost-vdpa: Add check for full 64-bit in region delete
The unmap ioctl doesn't accept a full 64-bit span. So need to
add check for the section's size in vhost_vdpa_listener_region_del().

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20230510054631.2951812-4-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-05-19 10:30:46 -04:00
Cindy Lu
3d1e4d34a8 vhost_vdpa: fix the input in trace_vhost_vdpa_listener_region_del()
In trace_vhost_vdpa_listener_region_del, the value for llend
should change to int128_get64(int128_sub(llend, int128_one()))

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20230510054631.2951812-3-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-05-19 10:30:46 -04:00
Cindy Lu
74b5d2b56c vhost: expose function vhost_dev_has_iommu()
To support vIOMMU in vdpa, need to exposed the function
vhost_dev_has_iommu, vdpa will use this function to check
if vIOMMU enable.

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20230510054631.2951812-2-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-05-19 10:30:46 -04:00
Mauro Matteo Cascella
3e69908907 virtio-crypto: fix NULL pointer dereference in virtio_crypto_free_request
Ensure op_info is not NULL in case of QCRYPTODEV_BACKEND_ALG_SYM algtype.

Fixes: 0e660a6f90 ("crypto: Introduce RSA algorithm")
Signed-off-by: Mauro Matteo Cascella <mcascell@redhat.com>
Reported-by: Yiming Tao <taoym@zju.edu.cn>
Message-Id: <20230509075317.1132301-1-mcascell@redhat.com>
Reviewed-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: zhenwei pi<pizhenwei@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-05-19 10:30:46 -04:00
David Hildenbrand
bab105300b vhost-user: Remove acpi-specific memslot limit
Let's just support 512 memslots on x86-64 and aarch64 as well. The maximum
number of ACPI slots (256) is no longer completely expressive ever since
we supported virtio-based memory devices. Further, we're completely
ignoring other memslots used outside of memory device context, such as
memslots used for boot memory.

Note that the vhost memslot limit in the kernel is usually configured to
be 509. With this change, we prepare vhost-user on the QEMU side to be
closer to that limit, to eventually support ~512 memslots in most vhost
implementations and have less "surprises" when cold/hotplugging vhost
devices while also consuming more memslots than we're currently used to
by memory devices (e.g., once virtio-mem starts using multiple memslots).

Note that most vhost-user implementations only support a small number of
memslots so far, which we can hopefully improve in the near future.

We'll leave the PPC special-case as is for now.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20230503184144.808478-1-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-05-19 10:30:46 -04:00
David Hildenbrand
d5cef02574 virtio-mem: Default to "unplugged-inaccessible=on" with 8.1 on x86-64
Allowing guests to read unplugged memory simplified the bring-up of
virtio-mem in Linux guests -- which was limited to x86-64 only. On arm64
(which was added later), we never had legacy guests and don't even allow
to configure it, essentially always having "unplugged-inaccessible=on".

At this point, all guests we care about
should be supporting VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE, so let's
change the default for the 8.1 machine.

This change implies that also memory that supports the shared zeropage
(private anonymous memory) will now require
VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE in the driver in order to be usable by
the guest -- as default, one can still manually set the
unplugged-inaccessible property.

Disallowing the guest to read unplugged memory will be important for
some future features, such as memslot optimizations or protection of
unplugged memory, whereby we'll actually no longer allow the guest to
even read from unplugged memory.

At some point, we might want to deprecate and remove that property.

Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Richard Henderson <richard.henderson@linaro.org>
Cc: Eduardo Habkost <eduardo@habkost.net>

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20230503182352.792458-1-david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-05-19 10:30:46 -04:00
Stefan Hajnoczi
6f8be29ec1 vhost-user: send SET_STATUS 0 after GET_VRING_BASE
Setting the VIRTIO Device Status Field to 0 resets the device. The
device's state is lost, including the vring configuration.

vhost-user.c currently sends SET_STATUS 0 before GET_VRING_BASE. This
risks confusion about the lifetime of the vhost-user state (e.g. vring
last_avail_idx) across VIRTIO device reset.

Eugenio Pérez <eperezma@redhat.com> adjusted the order for vhost-vdpa.c
in commit c3716f260b ("vdpa: move vhost reset after get vring base")
and in that commit description suggested doing the same for vhost-user
in the future.

Go ahead and adjust vhost-user.c now. I ran various online code searches
to identify vhost-user backends implementing SET_STATUS. It seems only
DPDK implements SET_STATUS and Yajun Wu <yajunw@nvidia.com> has
confirmed that it is safe to make this change.

Fixes: commit 923b8921d2 ("vhost-user: Support vhost_dev_start")
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Cindy Lu <lulu@redhat.com>
Cc: Yajun Wu <yajunw@nvidia.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230501230409.274178-1-stefanha@redhat.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Reviewed-by: Yajun Wu <yajunw@nvidia.com>
Acked-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-05-19 10:30:46 -04:00
Hawkins Jiawei
5d410557de vhost: fix possible wrap in SVQ descriptor ring
QEMU invokes vhost_svq_add() when adding a guest's element
into SVQ. In vhost_svq_add(), it uses vhost_svq_available_slots()
to check whether QEMU can add the element into SVQ. If there is
enough space, then QEMU combines some out descriptors and some
in descriptors into one descriptor chain, and adds it into
`svq->vring.desc` by vhost_svq_vring_write_descs().

Yet the problem is that, `svq->shadow_avail_idx - svq->shadow_used_idx`
in vhost_svq_available_slots() returns the number of occupied elements,
or the number of descriptor chains, instead of the number of occupied
descriptors, which may cause wrapping in SVQ descriptor ring.

Here is an example. In vhost_handle_guest_kick(), QEMU forwards
as many available buffers to device by virtqueue_pop() and
vhost_svq_add_element(). virtqueue_pop() returns a guest's element,
and then this element is added into SVQ by vhost_svq_add_element(),
a wrapper to vhost_svq_add(). If QEMU invokes virtqueue_pop() and
vhost_svq_add_element() `svq->vring.num` times,
vhost_svq_available_slots() thinks QEMU just ran out of slots and
everything should work fine. But in fact, virtqueue_pop() returns
`svq->vring.num` elements or descriptor chains, more than
`svq->vring.num` descriptors due to guest memory fragmentation,
and this causes wrapping in SVQ descriptor ring.

This bug is valid even before marking the descriptors used.
If the guest memory is fragmented, SVQ must add chains
so it can try to add more descriptors than possible.

This patch solves it by adding `num_free` field in
VhostShadowVirtqueue structure and updating this field
in vhost_svq_add() and vhost_svq_get_buf(), to record
the number of free descriptors.

Fixes: 100890f7ca ("vhost: Shadow virtqueue buffers forwarding")
Signed-off-by: Hawkins Jiawei <yin31149@gmail.com>
Acked-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230509084817.3973-1-yin31149@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
2023-05-19 01:36:09 -04:00
Sam Li
4f7366506a virtio-blk: add zoned storage emulation for zoned devices
This patch extends virtio-blk emulation to handle zoned device commands
by calling the new block layer APIs to perform zoned device I/O on
behalf of the guest. It supports Report Zone, four zone oparations (open,
close, finish, reset), and Append Zone.

The VIRTIO_BLK_F_ZONED feature bit will only be set if the host does
support zoned block devices. Regular block devices(conventional zones)
will not be set.

The guest os can use blktests, fio to test those commands on zoned devices.
Furthermore, using zonefs to test zone append write is also supported.

Signed-off-by: Sam Li <faithilikerun@gmail.com>
Message-id: 20230508051916.178322-2-faithilikerun@gmail.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2023-05-15 08:18:10 -04:00
Alexander Bulekov
f63192b054 hw: replace most qemu_bh_new calls with qemu_bh_new_guarded
This protects devices from bh->mmio reentrancy issues.

Thanks: Thomas Huth <thuth@redhat.com> for diagnosing OS X test failure.
Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Paul Durrant <paul@xen.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230427211013.2994127-5-alxndr@bu.edu>
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-04-28 11:31:54 +02:00
Richard Henderson
4d1467a568 Block layer patches
- Protect BlockBackend.queued_requests with its own lock
 - Switch to AIO_WAIT_WHILE_UNLOCKED() where possible
 - AioContext removal: LinuxAioState/LuringState/ThreadPool
 - Add more coroutine_fn annotations, use bdrv/blk_co_*
 - Fix crash when execute hmp_commit
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Merge tag 'for-upstream' of https://repo.or.cz/qemu/kevin into staging

Block layer patches

- Protect BlockBackend.queued_requests with its own lock
- Switch to AIO_WAIT_WHILE_UNLOCKED() where possible
- AioContext removal: LinuxAioState/LuringState/ThreadPool
- Add more coroutine_fn annotations, use bdrv/blk_co_*
- Fix crash when execute hmp_commit

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# gpg: Good signature from "Kevin Wolf <kwolf@redhat.com>" [full]

* tag 'for-upstream' of https://repo.or.cz/qemu/kevin: (25 commits)
  block/monitor: Fix crash when executing HMP commit
  vmdk: make vmdk_is_cid_valid a coroutine_fn
  qcow2: mark various functions as coroutine_fn and GRAPH_RDLOCK
  tests: mark more coroutine_fns
  qemu-pr-helper: mark more coroutine_fns
  9pfs: mark more coroutine_fns
  nbd: mark more coroutine_fns, do not use co_wrappers
  mirror: make mirror_flush a coroutine_fn, do not use co_wrappers
  blkdebug: add missing coroutine_fn annotation
  vvfat: mark various functions as coroutine_fn
  thread-pool: avoid passing the pool parameter every time
  thread-pool: use ThreadPool from the running thread
  io_uring: use LuringState from the running thread
  linux-aio: use LinuxAioState from the running thread
  block: add missing coroutine_fn to bdrv_sum_allocated_file_size()
  include/block: fixup typos
  monitor: convert monitor_cleanup() to AIO_WAIT_WHILE_UNLOCKED()
  hmp: convert handle_hmp_command() to AIO_WAIT_WHILE_UNLOCKED()
  block: convert bdrv_drain_all_begin() to AIO_WAIT_WHILE_UNLOCKED()
  block: convert bdrv_graph_wrlock() to AIO_WAIT_WHILE_UNLOCKED()
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-04-26 07:22:37 +01:00
Emanuele Giuseppe Esposito
aef04fc790 thread-pool: avoid passing the pool parameter every time
thread_pool_submit_aio() is always called on a pool taken from
qemu_get_current_aio_context(), and that is the only intended
use: each pool runs only in the same thread that is submitting
work to it, it can't run anywhere else.

Therefore simplify the thread_pool_submit* API and remove the
ThreadPool function parameter.

Signed-off-by: Emanuele Giuseppe Esposito <eesposit@redhat.com>
Message-Id: <20230203131731.851116-5-eesposit@redhat.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
2023-04-25 13:17:28 +02:00
Richard Henderson
a14b8206c5 virtio,pc,pci: fixes, features, cleanups
Mostly just fixes, cleanups all over the place.
 Some optimizations.
 More control over slot_reserved_mask.
 More feature bits supported for SVQ.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: fixes, features, cleanups

Mostly just fixes, cleanups all over the place.
Some optimizations.
More control over slot_reserved_mask.
More feature bits supported for SVQ.

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

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* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (31 commits)
  hw/pci-bridge: Make PCIe and CXL PXB Devices inherit from TYPE_PXB_DEV
  hw/pci-bridge: pci_expander_bridge fix type in pxb_cxl_dev_reset()
  docs/specs: Convert pci-testdev.txt to rst
  docs/specs: Convert pci-serial.txt to rst
  docs/specs/pci-ids: Convert from txt to rST
  acpi: pcihp: allow repeating hot-unplug requests
  virtio: i2c: Check notifier helpers for VIRTIO_CONFIG_IRQ_IDX
  docs: Remove obsolete descriptions of SR-IOV support
  intel_iommu: refine iotlb hash calculation
  docs/cxl: Fix sentence
  MAINTAINERS: Add Eugenio Pérez as vhost-shadow-virtqueue reviewer
  tests: bios-tables-test: replace memset with initializer
  hw/acpi: limit warning on acpi table size to pc machines older than version 2.3
  Add my old and new work email mapping and use work email to support acpi
  vhost-user-blk-server: notify client about disk resize
  pci: avoid accessing slot_reserved_mask directly outside of pci.c
  hw: Add compat machines for 8.1
  hw/i386/amd_iommu: Factor amdvi_pci_realize out of amdvi_sysbus_realize
  hw/i386/amd_iommu: Set PCI static/const fields via PCIDeviceClass
  hw/i386/amd_iommu: Move capab_offset from AMDVIState to AMDVIPCIState
  ...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2023-04-25 09:13:27 +01:00
Viresh Kumar
91208dd297 virtio: i2c: Check notifier helpers for VIRTIO_CONFIG_IRQ_IDX
Since the driver doesn't support interrupts, we must return early when
index is set to VIRTIO_CONFIG_IRQ_IDX.

Fixes: 544f0278af ("virtio: introduce macro VIRTIO_CONFIG_IRQ_IDX")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Message-Id: <d53ec8bc002001eafac597f6bd9a8812df989257.1681790067.git.viresh.kumar@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-04-24 22:56:55 -04:00
Juan Quintela
1f0776f1c0 migration: Create options.c
We move there all capabilities helpers from migration.c.

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

---

Following David advise:
- looked through the history, capabilities are newer than 2012, so we
  can remove that bit of the header.
- This part is posterior to Anthony.
  Original Author is Orit. Once there,
  I put myself.  Peter Xu also did quite a bit of work here.
  Anyone else wants/needs to be there?  I didn't search too hard
  because nobody asked before to be added.

What do you think?
2023-04-24 15:01:46 +02:00
Yangming
e919402b9e virtio-balloon: optimize the virtio-balloon on the ARM platform
Optimize the virtio-balloon feature on the ARM platform by adding
a variable to keep track of the current hot-plugged pc-dimm size,
instead of traversing the virtual machine's memory modules to count
the current RAM size during the balloon inflation or deflation
process. This variable can be updated only when plugging or unplugging
the device, which will result in an increase of approximately 60%
efficiency of balloon process on the ARM platform.

We tested the total amount of time required for the balloon inflation process on ARM:
inflate the balloon to 64GB of a 128GB guest under stress.
Before: 102 seconds
After: 42 seconds

Signed-off-by: Qi Xi <xiqi2@huawei.com>
Signed-off-by: Ming Yang yangming73@huawei.com
Message-Id: <e13bc78f96774bfab4576814c293aa52@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
2023-04-21 04:25:52 -04:00
Peter Xu
560a997535 vhost: Drop unused eventfd_add|del hooks
These hooks were introduced in:

80a1ea3748 ("memory: move ioeventfd ops to MemoryListener", 2012-02-29)

But they seem to be never used.  Drop them.

Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20230306193209.516011-1-peterx@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-04-21 04:25:52 -04:00
Carlos López
f0d634ea19 virtio: refresh vring region cache after updating a virtqueue size
When a virtqueue size is changed by the guest via
virtio_queue_set_num(), its region cache is not automatically updated.
If the size was increased, this could lead to accessing the cache out
of bounds. For example, in vring_get_used_event():

    static inline uint16_t vring_get_used_event(VirtQueue *vq)
    {
        return vring_avail_ring(vq, vq->vring.num);
    }

    static inline uint16_t vring_avail_ring(VirtQueue *vq, int i)
    {
        VRingMemoryRegionCaches *caches = vring_get_region_caches(vq);
        hwaddr pa = offsetof(VRingAvail, ring[i]);

        if (!caches) {
            return 0;
        }

        return virtio_lduw_phys_cached(vq->vdev, &caches->avail, pa);
    }

vq->vring.num will be greater than caches->avail.len, which will
trigger a failed assertion down the call path of
virtio_lduw_phys_cached().

Fix this by calling virtio_init_region_cache() after
virtio_queue_set_num() if we are not already calling
virtio_queue_set_rings(). In the legacy path this is already done by
virtio_queue_update_rings().

Signed-off-by: Carlos López <clopez@suse.de>
Message-Id: <20230317002749.27379-1-clopez@suse.de>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Acked-by: Halil Pasic <pasic@linux.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-04-21 03:08:21 -04:00
Carlos López
bbc1c327d7 virtio: fix reachable assertion due to stale value of cached region size
In virtqueue_{split,packed}_get_avail_bytes() descriptors are read
in a loop via MemoryRegionCache regions and calls to
vring_{split,packed}_desc_read() - these take a region cache and the
index of the descriptor to be read.

For direct descriptors we use a cache provided by the caller, whose
size matches that of the virtqueue vring. We limit the number of
descriptors we can read by the size of that vring:

    max = vq->vring.num;
    ...
    MemoryRegionCache *desc_cache = &caches->desc;

For indirect descriptors, we initialize a new cache and limit the
number of descriptors by the size of the intermediate descriptor:

    len = address_space_cache_init(&indirect_desc_cache,
                                   vdev->dma_as,
                                   desc.addr, desc.len, false);
    desc_cache = &indirect_desc_cache;
    ...
    max = desc.len / sizeof(VRingDesc);

However, the first initialization of `max` is done outside the loop
where we process guest descriptors, while the second one is done
inside. This means that a sequence of an indirect descriptor followed
by a direct one will leave a stale value in `max`. If the second
descriptor's `next` field is smaller than the stale value, but
greater than the size of the virtqueue ring (and thus the cached
region), a failed assertion will be triggered in
address_space_read_cached() down the call chain.

Fix this by initializing `max` inside the loop in both functions.

Fixes: 9796d0ac8f ("virtio: use address_space_map/unmap to access descriptors")
Signed-off-by: Carlos López <clopez@suse.de>
Message-Id: <20230302100358.3613-1-clopez@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 19:51:07 -05:00
Albert Esteve
90e31232cf hw/virtio/vhost-user: avoid using unitialized errp
During protocol negotiation, when we the QEMU
stub does not support a backend with F_CONFIG,
it throws a warning and supresses the
VHOST_USER_PROTOCOL_F_CONFIG bit.

However, the warning uses warn_reportf_err macro
and passes an unitialized errp pointer. However,
the macro tries to edit the 'msg' member of the
unitialized Error and segfaults.

Instead, just use warn_report, which prints a
warning message directly to the output.

Fixes: 5653493 ("hw/virtio/vhost-user: don't suppress F_CONFIG when supported")
Signed-off-by: Albert Esteve <aesteve@redhat.com>
Message-Id: <20230302121719.9390-1-aesteve@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 19:51:07 -05:00
Eugenio Pérez
ab7337e3b2 vdpa: return VHOST_F_LOG_ALL in vhost-vdpa devices
vhost-vdpa devices can return this feature now that blockers have been
set in case some features are not met.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20230303172445.1089785-15-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
Eugenio Pérez
57ac831865 vdpa: block migration if SVQ does not admit a feature
Next patches enable devices to be migrated even if vdpa netdev has not
been started with x-svq. However, not all devices are migratable, so we
need to block migration if we detect that.

Block migration if we detect the device expose a feature SVQ does not
know how to work with.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230303172445.1089785-13-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
Eugenio Pérez
9c363cf6d5 vdpa net: block migration if the device has CVQ
Devices with CVQ need to migrate state beyond vq state.  Leaving this to
future series.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230303172445.1089785-11-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
Eugenio Pérez
a230c4712b vdpa: disable RAM block discard only for the first device
Although it does not make a big difference, its more correct and
simplifies the cleanup path in subsequent patches.

Move ram_block_discard_disable(false) call to the top of
vhost_vdpa_cleanup because:
* We cannot use vhost_vdpa_first_dev after dev->opaque = NULL
  assignment.
* Improve the stack order in cleanup: since it is the last action taken
  in init, it should be the first at cleanup.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230303172445.1089785-10-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
Eugenio Pérez
c3716f260b vdpa: move vhost reset after get vring base
The function vhost.c:vhost_dev_stop calls vhost operation
vhost_dev_start(false). In the case of vdpa it totally reset and wipes
the device, making the fetching of the vring base (virtqueue state) totally
useless.

The kernel backend does not use vhost_dev_start vhost op callback, but
vhost-user do. A patch to make vhost_user_dev_start more similar to vdpa
is desirable, but it can be added on top.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230303172445.1089785-8-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
Eugenio Pérez
0bb302a996 vdpa: add vhost_vdpa_suspend
The function vhost.c:vhost_dev_stop fetches the vring base so the vq
state can be migrated to other devices.  However, this is unreliable in
vdpa, since we didn't signal the device to suspend the queues, making
the value fetched useless.

Suspend the device if possible before fetching first and subsequent
vring bases.

Moreover, vdpa totally reset and wipes the device at the last device
before fetch its vrings base, making that operation useless in the last
device. This will be fixed in later patches of this series.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230303172445.1089785-7-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
Eugenio Pérez
b6662cb7e5 vdpa: add vhost_vdpa->suspended parameter
This allows vhost_vdpa to track if it is safe to get the vring base from
the device or not.  If it is not, vhost can fall back to fetch idx from
the guest buffer again.

No functional change intended in this patch, later patches will use this
field.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230303172445.1089785-6-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
Eugenio Pérez
4241e8bd72 vdpa: rewind at get_base, not set_base
At this moment it is only possible to migrate to a vdpa device running
with x-svq=on. As a protective measure, the rewind of the inflight
descriptors was done at the destination. That way if the source sent a
virtqueue with inuse descriptors they are always discarded.

Since this series allows to migrate also to passthrough devices with no
SVQ, the right thing to do is to rewind at the source so the base of
vrings are correct.

Support for inflight descriptors may be added in the future.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20230303172445.1089785-5-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
Eugenio Pérez
d83b494580 vdpa: Negotiate _F_SUSPEND feature
This is needed for qemu to know it can suspend the device to retrieve
its status and enable SVQ with it, so all the process is transparent to
the guest.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20230303172445.1089785-4-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
Eugenio Pérez
b276524386 vdpa: Remember last call fd set
As SVQ can be enabled dynamically at any time, it needs to store call fd
always.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230303172445.1089785-3-eperezma@redhat.com>
Tested-by: Lei Yang <leiyang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
zhenwei pi
2cb0692768 cryptodev: Use CryptoDevBackendOpInfo for operation
Move queue_index, CryptoDevCompletionFunc and opaque into struct
CryptoDevBackendOpInfo, then cryptodev_backend_crypto_operation()
needs an argument CryptoDevBackendOpInfo *op_info only. And remove
VirtIOCryptoReq from cryptodev. It's also possible to hide
VirtIOCryptoReq into virtio-crypto.c in the next step. (In theory,
VirtIOCryptoReq is a private structure used by virtio-crypto only)

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230301105847.253084-9-pizhenwei@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
zhenwei pi
bc304a6442 cryptodev: Introduce server type in QAPI
Introduce cryptodev service type in cryptodev.json, then apply this
to related codes. Now we can remove VIRTIO_CRYPTO_SERVICE_xxx
dependence from QEMU cryptodev.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230301105847.253084-5-pizhenwei@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
zhenwei pi
999c789f00 cryptodev: Introduce cryptodev alg type in QAPI
Introduce cryptodev alg type in cryptodev.json, then apply this to
related codes, and drop 'enum CryptoDevBackendAlgType'.

There are two options:
1, { 'enum': 'QCryptodevBackendAlgType',
  'prefix': 'CRYPTODEV_BACKEND_ALG',
  'data': ['sym', 'asym']}
Then we can keep 'CRYPTODEV_BACKEND_ALG_SYM' and avoid lots of
changes.
2, changes in this patch(with prefix 'QCRYPTODEV_BACKEND_ALG').

To avoid breaking the rule of QAPI, use 2 here.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Signed-off-by: zhenwei pi <pizhenwei@bytedance.com>
Message-Id: <20230301105847.253084-4-pizhenwei@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-07 12:38:59 -05:00
Carlos López
e4dd39c699 vhost: avoid a potential use of an uninitialized variable in vhost_svq_poll()
In vhost_svq_poll(), if vhost_svq_get_buf() fails due to a device
providing invalid descriptors, len is left uninitialized and returned
to the caller, potentally leaking stack data or causing undefined
behavior.

Fix this by initializing len to 0.

Found with GCC 13 and -fanalyzer (abridged):

../hw/virtio/vhost-shadow-virtqueue.c: In function ‘vhost_svq_poll’:
../hw/virtio/vhost-shadow-virtqueue.c:538:12: warning: use of uninitialized value ‘len’ [CWE-457] [-Wanalyzer-use-of-uninitialized-value]
  538 |     return len;
      |            ^~~
  ‘vhost_svq_poll’: events 1-4
    |
    |  522 | size_t vhost_svq_poll(VhostShadowVirtqueue *svq)
    |      |        ^~~~~~~~~~~~~~
    |      |        |
    |      |        (1) entry to ‘vhost_svq_poll’
    |......
    |  525 |     uint32_t len;
    |      |              ~~~
    |      |              |
    |      |              (2) region created on stack here
    |      |              (3) capacity: 4 bytes
    |......
    |  528 |         if (vhost_svq_more_used(svq)) {
    |      |             ~
    |      |             |
    |      |             (4) inlined call to ‘vhost_svq_more_used’ from ‘vhost_svq_poll’

    (...)

    |  528 |         if (vhost_svq_more_used(svq)) {
    |      |            ^~~~~~~~~~~~~~~~~~~~~~~~~
    |      |            ||
    |      |            |(8) ...to here
    |      |            (7) following ‘true’ branch...
    |......
    |  537 |     vhost_svq_get_buf(svq, &len);
    |      |     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    |      |     |
    |      |     (9) calling ‘vhost_svq_get_buf’ from ‘vhost_svq_poll’
    |
    +--> ‘vhost_svq_get_buf’: events 10-11
           |
           |  416 | static VirtQueueElement *vhost_svq_get_buf(VhostShadowVirtqueue *svq,
           |      |                          ^~~~~~~~~~~~~~~~~
           |      |                          |
           |      |                          (10) entry to ‘vhost_svq_get_buf’
           |......
           |  423 |     if (!vhost_svq_more_used(svq)) {
           |      |          ~
           |      |          |
           |      |          (11) inlined call to ‘vhost_svq_more_used’ from ‘vhost_svq_get_buf’
           |

           (...)

           |
         ‘vhost_svq_get_buf’: event 14
           |
           |  423 |     if (!vhost_svq_more_used(svq)) {
           |      |        ^
           |      |        |
           |      |        (14) following ‘false’ branch...
           |
         ‘vhost_svq_get_buf’: event 15
           |
           |cc1:
           | (15): ...to here
           |
    <------+
    |
  ‘vhost_svq_poll’: events 16-17
    |
    |  537 |     vhost_svq_get_buf(svq, &len);
    |      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
    |      |     |
    |      |     (16) returning to ‘vhost_svq_poll’ from ‘vhost_svq_get_buf’
    |  538 |     return len;
    |      |            ~~~
    |      |            |
    |      |            (17) use of uninitialized value ‘len’ here

Note by  Laurent Vivier <lvivier@redhat.com>:

    The return value is only used to detect an error:

    vhost_svq_poll
        vhost_vdpa_net_cvq_add
            vhost_vdpa_net_load_cmd
                vhost_vdpa_net_load_mac
                  -> a negative return is only used to detect error
                vhost_vdpa_net_load_mq
                  -> a negative return is only used to detect error
            vhost_vdpa_net_handle_ctrl_avail
              -> a negative return is only used to detect error

Fixes: d368c0b052 ("vhost: Do not depend on !NULL VirtQueueElement on vhost_svq_flush")
Signed-off-by: Carlos López <clopez@suse.de>
Message-Id: <20230213085747.19956-1-clopez@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-02 19:13:51 -05:00
Eugenio Pérez
2e1a9de96b vdpa: stop all svq on device deletion
Not stopping them leave the device in a bad state when virtio-net
fronted device is unplugged with device_del monitor command.

This is not triggable in regular poweroff or qemu forces shutdown
because cleanup is called right after vhost_vdpa_dev_start(false).  But
devices hot unplug does not call vdpa device cleanups.  This lead to all
the vhost_vdpa devices without stop the SVQ but the last.

Fix it and clean the code, making it symmetric with
vhost_vdpa_svqs_start.

Fixes: dff4426fa6 ("vhost: Add Shadow VirtQueue kick forwarding capabilities")
Reported-by: Lei Yang <leiyang@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20230209170004.899472-1-eperezma@redhat.com>
Tested-by: Laurent Vivier <lvivier@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
2023-03-02 03:10:48 -05:00
Maxime Coquelin
a84ec9935f vhost-user: Adopt new backend naming
The Vhost-user specification changed feature and request
naming from _SLAVE_ to _BACKEND_.

This patch adopts the new naming convention.

Signed-off-by: Maxime Coquelin <maxime.coquelin@redhat.com>
Message-Id: <20230208203259.381326-4-maxime.coquelin@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-02 03:10:48 -05:00
Akihiko Odaki
f0dac71596 vhost-user-rng: Back up vqs before cleaning up vhost_dev
vhost_dev_cleanup() clears vhost_dev so back up its vqs member to free
the memory pointed by the member.

Fixes: 821d28b88f ("vhost-user-rng: Add vhost-user-rng implementation")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20230130140516.78078-1-akihiko.odaki@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-02 03:10:47 -05:00
Akihiko Odaki
0126793bee vhost-user-i2c: Back up vqs before cleaning up vhost_dev
vhost_dev_cleanup() clears vhost_dev so back up its vqs member to free
the memory pointed by the member.

Fixes: 7221d3b634 ("hw/virtio: add boilerplate for vhost-user-i2c device")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20230130140435.78049-1-akihiko.odaki@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-02 03:10:47 -05:00
Akihiko Odaki
daae36c13a vhost-user-gpio: Configure vhost_dev when connecting
vhost_dev_cleanup(), called from vu_gpio_disconnect(), clears vhost_dev
so vhost-user-gpio must set the members of vhost_dev each time
connecting.

do_vhost_user_cleanup() should also acquire the pointer to vqs directly
from VHostUserGPIO instead of referring to vhost_dev as it can be called
after vhost_dev_cleanup().

Fixes: 27ba7b027f ("hw/virtio: add boilerplate for vhost-user-gpio device")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20230130140320.77999-1-akihiko.odaki@daynix.com>
Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-03-02 03:10:47 -05:00
Akihiko Odaki
331acddc87 vhost-user-fs: Back up vqs before cleaning up vhost_dev
vhost_dev_cleanup() clears vhost_dev so back up its vqs member to free
the memory pointed by the member.

Fixes: 98fc1ada4c ("virtio: add vhost-user-fs base device")
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-Id: <20230130140225.77964-1-akihiko.odaki@daynix.com>
2023-02-09 10:21:11 -05:00
David Hildenbrand
d71920d425 virtio-mem: Proper support for preallocation with migration
Ordinary memory preallocation runs when QEMU starts up and creates the
memory backends, before processing the incoming migration stream. With
virtio-mem, we don't know which memory blocks to preallocate before
migration started. Now that we migrate the virtio-mem bitmap early, before
migrating any RAM content, we can safely preallocate memory for all plugged
memory blocks before migrating any RAM content.

This is especially relevant for the following cases:

(1) User errors

With hugetlb/files, if we don't have sufficient backend memory available on
the migration destination, we'll crash QEMU (SIGBUS) during RAM migration
when running out of backend memory. Preallocating memory before actual
RAM migration allows for failing gracefully and informing the user about
the setup problem.

(2) Excluded memory ranges during migration

For example, virtio-balloon free page hinting will exclude some pages
from getting migrated. In that case, we won't crash during RAM
migration, but later, when running the VM on the destination, which is
bad.

To fix this for new QEMU machines that migrate the bitmap early,
preallocate the memory early, before any RAM migration. Warn with old
QEMU machines.

Getting postcopy right is a bit tricky, but we essentially now implement
the same (problematic) preallocation logic as ordinary preallocation:
preallocate memory early and discard it again before precopy starts. During
ordinary preallocation, discarding of RAM happens when postcopy is advised.
As the state (bitmap) is loaded after postcopy was advised but before
postcopy starts listening, we have to discard memory we preallocated
immediately again ourselves.

Note that nothing (not even hugetlb reservations) guarantees for postcopy
that backend memory (especially, hugetlb pages) are still free after they
were freed ones while discarding RAM. Still, allocating that memory at
least once helps catching some basic setup problems.

Before this change, trying to restore a VM when insufficient hugetlb
pages are around results in the process crashing to to a "Bus error"
(SIGBUS). With this change, QEMU fails gracefully:

  qemu-system-x86_64: qemu_prealloc_mem: preallocating memory failed: Bad address
  qemu-system-x86_64: error while loading state for instance 0x0 of device '0000:00:03.0/virtio-mem-device-early'
  qemu-system-x86_64: load of migration failed: Cannot allocate memory

And we can even introspect the early migration data, including the
bitmap:
  $ ./scripts/analyze-migration.py -f STATEFILE
  {
  "ram (2)": {
      "section sizes": {
          "0000:00:03.0/mem0": "0x0000000780000000",
          "0000:00:04.0/mem1": "0x0000000780000000",
          "pc.ram": "0x0000000100000000",
          "/rom@etc/acpi/tables": "0x0000000000020000",
          "pc.bios": "0x0000000000040000",
          "0000:00:02.0/e1000.rom": "0x0000000000040000",
          "pc.rom": "0x0000000000020000",
          "/rom@etc/table-loader": "0x0000000000001000",
          "/rom@etc/acpi/rsdp": "0x0000000000001000"
      }
  },
  "0000:00:03.0/virtio-mem-device-early (51)": {
      "tmp": "00 00 00 01 40 00 00 00 00 00 00 07 80 00 00 00 00 00 00 00 00 20 00 00 00 00 00 00",
      "size": "0x0000000040000000",
      "bitmap": "ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [...]
  },
  "0000:00:04.0/virtio-mem-device-early (53)": {
      "tmp": "00 00 00 08 c0 00 00 00 00 00 00 07 80 00 00 00 00 00 00 00 00 20 00 00 00 00 00 00",
      "size": "0x00000001fa400000",
      "bitmap": "ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [...]
  },
  [...]

Reported-by: Jing Qi <jinqi@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>S
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2023-02-06 19:22:56 +01:00
David Hildenbrand
3b95a71b22 virtio-mem: Migrate immutable properties early
The bitmap and the size are immutable while migration is active: see
virtio_mem_is_busy(). We can migrate this information early, before
migrating any actual RAM content. Further, all information we need for
sanity checks is immutable as well.

Having this information in place early will, for example, allow for
properly preallocating memory before touching these memory locations
during RAM migration: this way, we can make sure that all memory was
actually preallocated and that any user errors (e.g., insufficient
hugetlb pages) can be handled gracefully.

In contrast, usable_region_size and requested_size can theoretically
still be modified on the source while the VM is running. Keep migrating
these properties the usual, late, way.

Use a new device property to keep behavior of compat machines
unmodified.

Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>S
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2023-02-06 19:22:56 +01:00
David Hildenbrand
ce1761f0f9 virtio-mem: Fail if a memory backend with "prealloc=on" is specified
"prealloc=on" for the memory backend does not work as expected, as
virtio-mem will simply discard all preallocated memory immediately again.
In the best case, it's an expensive NOP. In the worst case, it's an
unexpected allocation error.

Instead, "prealloc=on" should be specified for the virtio-mem device only,
such that virtio-mem will try preallocating memory before plugging
memory dynamically to the guest. Fail if such a memory backend is
provided.

Tested-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>S
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
2023-02-06 19:22:56 +01:00
Markus Armbruster
fa1cea9d0f virtio: Move HMP commands from monitor/ to hw/virtio/
This moves these commands from MAINTAINERS section "Human
Monitor (HMP)" to "virtio".

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20230124121946.1139465-20-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-02-04 07:56:54 +01:00
Greg Kurz
4382138f64 Revert "vhost-user: Introduce nested event loop in vhost_user_read()"
This reverts commit a7f523c7d1.

The nested event loop is broken by design. It's only user was removed.
Drop the code as well so that nobody ever tries to use it again.

I had to fix a couple of trivial conflicts around return values because
of 025faa872b ("vhost-user: stick to -errno error return convention").

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <20230119172424.478268-3-groug@kaod.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>
2023-01-28 06:21:30 -05:00
Greg Kurz
f340a59d5a Revert "vhost-user: Monitor slave channel in vhost_user_read()"
This reverts commit db8a3772e3.

Motivation : this is breaking vhost-user with DPDK as reported in [0].

Received unexpected msg type. Expected 22 received 40
Fail to update device iotlb
Received unexpected msg type. Expected 40 received 22
Received unexpected msg type. Expected 22 received 11
Fail to update device iotlb
Received unexpected msg type. Expected 11 received 22
vhost VQ 1 ring restore failed: -71: Protocol error (71)
Received unexpected msg type. Expected 22 received 11
Fail to update device iotlb
Received unexpected msg type. Expected 11 received 22
vhost VQ 0 ring restore failed: -71: Protocol error (71)
unable to start vhost net: 71: falling back on userspace virtio

The failing sequence that leads to the first error is :
- QEMU sends a VHOST_USER_GET_STATUS (40) request to DPDK on the master
  socket
- QEMU starts a nested event loop in order to wait for the
  VHOST_USER_GET_STATUS response and to be able to process messages from
  the slave channel
- DPDK sends a couple of legitimate IOTLB miss messages on the slave
  channel
- QEMU processes each IOTLB request and sends VHOST_USER_IOTLB_MSG (22)
  updates on the master socket
- QEMU assumes to receive a response for the latest VHOST_USER_IOTLB_MSG
  but it gets the response for the VHOST_USER_GET_STATUS instead

The subsequent errors have the same root cause : the nested event loop
breaks the order by design. It lures QEMU to expect responses to the
latest message sent on the master socket to arrive first.

Since this was only needed for DAX enablement which is still not merged
upstream, just drop the code for now. A working solution will have to
be merged later on. Likely protect the master socket with a mutex
and service the slave channel with a separate thread, as discussed with
Maxime in the mail thread below.

[0] https://lore.kernel.org/qemu-devel/43145ede-89dc-280e-b953-6a2b436de395@redhat.com/

Reported-by: Yanghang Liu <yanghliu@redhat.com>
Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=2155173
Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <20230119172424.478268-2-groug@kaod.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Maxime Coquelin <maxime.coquelin@redhat.com>
2023-01-28 06:21:30 -05:00
Philippe Mathieu-Daudé
c45e7619db hw: Use TYPE_PCI_BUS definition where appropriate
Use the proper QOM type definition instead of magic string.
This also helps during eventual refactor while using git-grep.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230117193014.83502-1-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
2023-01-28 06:21:30 -05:00
Minghao Yuan
920c184fa9 vhost-user: Skip unnecessary duplicated VHOST_USER_ADD/REM_MEM_REG requests
The VHOST_USER_ADD/REM_MEM_REG requests should be categorized into
non-vring specific messages, and should be sent only once.

Signed-off-by: Minghao Yuan <yuanmh12@chinatelecom.cn>
Message-Id: <20230123122119.194347-1-yuanmh12@chinatelecom.cn>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-28 06:21:30 -05:00
Akihiko Odaki
744734ccc9 vhost-user: Correct a reference of TARGET_AARCH64
Presumably TARGET_ARM_64 should be a mistake of TARGET_AARCH64.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20230109063130.81296-1-akihiko.odaki@daynix.com>
Fixes: 27598393a2 ("Lift max memory slots limit imposed by vhost-user")
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-27 11:47:02 -05:00
Peter Maydell
fcb7e040f5 Header cleanup patches for 2023-01-20
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Merge tag 'pull-include-2023-01-20' of https://repo.or.cz/qemu/armbru into staging

Header cleanup patches for 2023-01-20

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* tag 'pull-include-2023-01-20' of https://repo.or.cz/qemu/armbru:
  include/hw/ppc include/hw/pci-host: Drop extra typedefs
  include/hw/ppc: Don't include hw/pci-host/pnv_phb.h from pnv.h
  include/hw/ppc: Supply a few missing includes
  include/hw/ppc: Split pnv_chip.h off pnv.h
  include/hw/block: Include hw/block/block.h where needed
  hw/sparc64/niagara: Use blk_name() instead of open-coding it
  include/block: Untangle inclusion loops
  coroutine: Use Coroutine typedef name instead of structure tag
  coroutine: Split qemu/coroutine-core.h off qemu/coroutine.h
  coroutine: Clean up superfluous inclusion of qemu/lockable.h
  coroutine: Move coroutine_fn to qemu/osdep.h, trim includes
  coroutine: Clean up superfluous inclusion of qemu/coroutine.h

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2023-01-20 13:17:55 +00:00
Markus Armbruster
e2c1c34f13 include/block: Untangle inclusion loops
We have two inclusion loops:

       block/block.h
    -> block/block-global-state.h
    -> block/block-common.h
    -> block/blockjob.h
    -> block/block.h

       block/block.h
    -> block/block-io.h
    -> block/block-common.h
    -> block/blockjob.h
    -> block/block.h

I believe these go back to Emanuele's reorganization of the block API,
merged a few months ago in commit d7e2fe4aac.

Fortunately, breaking them is merely a matter of deleting unnecessary
includes from headers, and adding them back in places where they are
now missing.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221221133551.3967339-2-armbru@redhat.com>
2023-01-20 07:24:28 +01:00
Philippe Mathieu-Daudé
883f2c591f bulk: Rename TARGET_FMT_plx -> HWADDR_FMT_plx
The 'hwaddr' type is defined in "exec/hwaddr.h" as:

    hwaddr is the type of a physical address
   (its size can be different from 'target_ulong').

All definitions use the 'HWADDR_' prefix, except TARGET_FMT_plx:

 $ fgrep define include/exec/hwaddr.h
 #define HWADDR_H
 #define HWADDR_BITS 64
 #define HWADDR_MAX UINT64_MAX
 #define TARGET_FMT_plx "%016" PRIx64
         ^^^^^^
 #define HWADDR_PRId PRId64
 #define HWADDR_PRIi PRIi64
 #define HWADDR_PRIo PRIo64
 #define HWADDR_PRIu PRIu64
 #define HWADDR_PRIx PRIx64
 #define HWADDR_PRIX PRIX64

Since hwaddr's size can be *different* from target_ulong, it is
very confusing to read one of its format using the 'TARGET_FMT_'
prefix, normally used for the target_long / target_ulong types:

$ fgrep TARGET_FMT_ include/exec/cpu-defs.h
 #define TARGET_FMT_lx "%08x"
 #define TARGET_FMT_ld "%d"
 #define TARGET_FMT_lu "%u"
 #define TARGET_FMT_lx "%016" PRIx64
 #define TARGET_FMT_ld "%" PRId64
 #define TARGET_FMT_lu "%" PRIu64

Apparently this format was missed during commit a8170e5e97
("Rename target_phys_addr_t to hwaddr"), so complete it by
doing a bulk-rename with:

 $ sed -i -e s/TARGET_FMT_plx/HWADDR_FMT_plx/g $(git grep -l TARGET_FMT_plx)

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20230110212947.34557-1-philmd@linaro.org>
[thuth: Fix some warnings from checkpatch.pl along the way]
Signed-off-by: Thomas Huth <thuth@redhat.com>
2023-01-18 11:14:34 +01:00
leixiang
4396d4bd74 virtio-pci: fix proxy->vector_irqfd leak in virtio_pci_set_guest_notifiers
proxy->vector_irqfd did not free when kvm_virtio_pci_vector_use or
msix_set_vector_notifiers failed in virtio_pci_set_guest_notifiers.

Fixes: 7d37d351

Signed-off-by: Lei Xiang <leixiang@kylinos.cn>
Tested-by: Zeng Chi <zengchi@kylinos.cn>
Suggested-by: Xie Ming <xieming@kylinos.cn>
Message-Id: <20221227081604.806415-1-leixiang@kylinos.cn>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:23 -05:00
Longpeng
e66f2311d6 vdpa: commit all host notifier MRs in a single MR transaction
This allows the vhost-vdpa device to batch the setup of all its MRs of
host notifiers.

This significantly reduces the device starting time, e.g. the time spend
on setup the host notifier MRs reduce from 423ms to 32ms for a VM with
64 vCPUs and 3 vhost-vDPA generic devices (vdpa_sim_blk, 64vq per device).

Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221227072015.3134-4-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-01-08 01:54:23 -05:00
Longpeng
0fdc6b8509 vhost: configure all host notifiers in a single MR transaction
This allows the vhost device to batch the setup of all its host notifiers.
This significantly reduces the device starting time, e.g. the time spend
on enabling notifiers reduce from 376ms to 9.1ms for a VM with 64 vCPUs
and 3 vhost-vDPA generic devices (vdpa_sim_blk, 64vq per device)

Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221227072015.3134-3-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2023-01-08 01:54:23 -05:00
Longpeng
8771589b6f vhost: simplify vhost_dev_enable_notifiers
Simplify the error path in vhost_dev_enable_notifiers by using
vhost_dev_disable_notifiers directly.

Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221227072015.3134-2-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Longpeng
c672f348cb vdpa-dev: get iova range explicitly
In commit a585fad26b ("vdpa: request iova_range only once") we remove
GET_IOVA_RANGE form vhost_vdpa_init, the generic vdpa device will start
without iova_range populated, so the device won't work. Let's call
GET_IOVA_RANGE ioctl explicitly.

Fixes: a585fad26b ("vdpa: request iova_range only once")
Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221224114848.3062-2-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
2023-01-08 01:54:22 -05:00
Markus Armbruster
f139b83717 include/hw/virtio: Break inclusion loop
hw/virtio/virtio.h and hw/virtio/vhost.h include each other.  The
former doesn't actually need the latter, so drop that inclusion to
break the loop.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20221222120813.727830-2-armbru@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Edgar E. Iglesias <edgar@zeroasic.com>
2023-01-08 01:54:22 -05:00
Philippe Mathieu-Daudé
9d94c21363 hw/virtio: Extract QMP QOM-specific functions to virtio-qmp.c
virtio.c is big enough, extract more QMP related code to virtio-qmp.c.
To do so, expose qmp_find_virtio_device() and declar virtio_list in
the internal virtio-qmp.h header.

Note we have to leave qmp_x_query_virtio_queue_status() and
qmp_x_query_virtio_queue_element(), because they access VirtQueue
internal fields, and VirtQueue is only declared within virtio.c.

Suggested-by: Jonah Palmer <jonah.palmer@oracle.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221222080005.27616-3-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Philippe Mathieu-Daudé
dd92cbb366 hw/virtio: Rename virtio_device_find() -> qmp_find_virtio_device()
To emphasize this function is QMP related, rename it.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221222080005.27616-2-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Cindy Lu
1680542862 virtio-pci: add support for configure interrupt
Add process to handle the configure interrupt, The function's
logic is the same with vq interrupt.Add extra process to check
the configure interrupt

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-11-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Cindy Lu
cd336e8346 virtio-mmio: add support for configure interrupt
Add configure interrupt support in virtio-mmio bus.
add function to set configure guest notifier.

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-10-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Cindy Lu
f9a09ca3ea vhost: add support for configure interrupt
Add functions to support configure interrupt.
The configure interrupt process will start in vhost_dev_start
and stop in vhost_dev_stop.

Also add the functions to support vhost_config_pending and
vhost_config_mask.

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-8-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Cindy Lu
7d847d0c9b virtio: add support for configure interrupt
Add the functions to support the configure interrupt in virtio
The function virtio_config_guest_notifier_read will notify the
guest if there is an configure interrupt.
The function virtio_config_set_guest_notifier_fd_handler is
to set the fd hander for the notifier

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-7-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Cindy Lu
259f3acc1c vhost-vdpa: add support for config interrupt
Add new call back function in vhost-vdpa, The function
vhost_set_config_call can set the event fd to kernel.
This function will be called in the vhost_dev_start
and vhost_dev_stop

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-6-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Cindy Lu
ee3b8dc6cc virtio-pci: decouple the single vector from the interrupt process
To reuse the interrupt process in configure interrupt
Need to decouple the single vector from the interrupt process.
We add new function kvm_virtio_pci_vector_use_one and _release_one.
These functions are used for the single vector, the whole process will
finish in the loop with vq number.

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-4-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Cindy Lu
2e07f69d0c virtio-pci: decouple notifier from interrupt process
To reuse the notifier process. We add the virtio_pci_get_notifier
to get the notifier and vector. The INPUT for this function is IDX,
The OUTPUT is the notifier and the vector

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-3-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Cindy Lu
544f0278af virtio: introduce macro VIRTIO_CONFIG_IRQ_IDX
To support configure interrupt for vhost-vdpa
Introduce VIRTIO_CONFIG_IRQ_IDX -1 as configure interrupt's queue index,
Then we can reuse the functions guest_notifier_mask and guest_notifier_pending.
Add the check of queue index in these drivers, if the driver does not support
configure interrupt, the function will just return

Signed-off-by: Cindy Lu <lulu@redhat.com>
Message-Id: <20221222070451.936503-2-lulu@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2023-01-08 01:54:22 -05:00
Philippe Mathieu-Daudé
82ba778e13 virtio-mem: Fix typo in function name
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221228130956.80515-1-philmd@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
2022-12-28 14:59:55 +01:00
Chenyi Qiang
29f1b328e3 virtio-mem: Fix the iterator variable in a vmem->rdl_list loop
It should be the variable rdl2 to revert the already-notified listeners.

Fixes: 2044969f0b ("virtio-mem: Implement RamDiscardManager interface")
Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com>
Message-Id: <20221228090312.17276-1-chenyi.qiang@intel.com>
Cc: qemu-stable@nongnu.org
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
2022-12-28 14:59:55 +01:00
Chenyi Qiang
b11cf32e07 virtio-mem: Fix the bitmap index of the section offset
vmem->bitmap indexes the memory region of the virtio-mem backend at a
granularity of block_size. To calculate the index of target section offset,
the block_size should be divided instead of the bitmap_size.

Fixes: 2044969f0b ("virtio-mem: Implement RamDiscardManager interface")
Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com>
Message-Id: <20221216062231.11181-1-chenyi.qiang@intel.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: David Hildenbrand <david@redhat.com>
2022-12-28 14:59:47 +01:00
Philippe Mathieu-Daudé
28b629ab4a hw/virtio: Extract QMP related code virtio-qmp.c
The monitor decoders are the only functions using the CONFIG_xxx
definitions declared in the target specific CONFIG_DEVICES header.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221213111707.34921-7-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <a class="moz-txt-link-rfc2396E" href="mailto:philmd@linaro.org">&lt;philmd@linaro.org&gt;</a>
2022-12-21 07:32:24 -05:00
Philippe Mathieu-Daudé
0f4b91f146 hw/virtio: Extract config read/write accessors to virtio-config-io.c
These config helpers use the target-dependent LD/ST API.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221213111707.34921-6-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 07:32:24 -05:00
Philippe Mathieu-Daudé
69779192ac hw/virtio: Constify qmp_virtio_feature_map_t[]
These arrays are only accessed read-only, move them to .rodata.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221213111707.34921-5-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jonah Palmer<jonah.palmer@oracle.com>
Signed-off-by: Philippe Mathieu-Daudé <a class="moz-txt-link-rfc2396E" href="mailto:philmd@linaro.org">&lt;philmd@linaro.org&gt;</a>
2022-12-21 07:32:24 -05:00
Philippe Mathieu-Daudé
f983e598e5 hw/virtio: Guard and restrict scope of qmp_virtio_feature_map_t[]
Commit f3034ad71f ("qmp: decode feature & status bits in
virtio-status") did not guard all qmp_virtio_feature_map_t
arrays with the corresponding #ifdef'ry used in
qmp_decode_features(). Fix that and reduce the arrays scope
by declaring them static.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221213111707.34921-4-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jonah Palmer<jonah.palmer@oracle.com>
Suggested-by: Richard Henderson <a class="moz-txt-link-rfc2396E" href="mailto:richard.henderson@linaro.org">&lt;richard.henderson@linaro.org&gt;</a>
Signed-off-by: Philippe Mathieu-Daudé <a class="moz-txt-link-rfc2396E" href="mailto:philmd@linaro.org">&lt;philmd@linaro.org&gt;</a>
2022-12-21 07:32:24 -05:00
Philippe Mathieu-Daudé
74a451630d hw/virtio: Rename virtio_ss[] -> specific_virtio_ss[]
Since virtio_ss[] is added to specific_ss[], rename it as
specific_virtio_ss[] to make it clearer.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221213111707.34921-3-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 07:32:24 -05:00
Philippe Mathieu-Daudé
302f1fe110 hw/virtio: Add missing "hw/core/cpu.h" include
virtio.c uses target_words_bigendian() which is declared in
"hw/core/cpu.h". Add the missing header to avoid when refactoring:

  hw/virtio/virtio.c:2451:9: error: implicit declaration of function 'target_words_bigendian' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    if (target_words_bigendian()) {
        ^

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221213111707.34921-2-philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 07:32:24 -05:00
Jason Wang
345cc1cbcb vhost: fix vq dirty bitmap syncing when vIOMMU is enabled
When vIOMMU is enabled, the vq->used_phys is actually the IOVA not
GPA. So we need to translate it to GPA before the syncing otherwise we
may hit the following crash since IOVA could be out of the scope of
the GPA log size. This could be noted when using virtio-IOMMU with
vhost using 1G memory.

Fixes: c471ad0e9b ("vhost_net: device IOTLB support")
Cc: qemu-stable@nongnu.org
Tested-by: Lei Yang <leiyang@redhat.com>
Reported-by: Yalan Zhang <yalzhang@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221216033552.77087-1-jasowang@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 07:32:24 -05:00
Yajun Wu
c98ac64cfb vhost-user: send set log base message only once
Vhost message VHOST_USER_SET_LOG_BASE is device wide. So only
send it once with the first queue pair.

Signed-off-by: Yajun Wu <yajunw@nvidia.com>
Acked-by: Parav Pandit <parav@nvidia.com>
Message-Id: <20221122051447.248462-1-yajunw@nvidia.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Eugenio Pérez
c1a1008685 vdpa: always start CVQ in SVQ mode if possible
Isolate control virtqueue in its own group, allowing to intercept control
commands but letting dataplane run totally passthrough to the guest.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20221215113144.322011-13-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
2022-12-21 06:35:28 -05:00
Eugenio Pérez
6188d78a19 vdpa: add shadow_data to vhost_vdpa
The memory listener that thells the device how to convert GPA to qemu's
va is registered against CVQ vhost_vdpa. memory listener translations
are always ASID 0, CVQ ones are ASID 1 if supported.

Let's tell the listener if it needs to register them on iova tree or
not.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221215113144.322011-12-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Eugenio Pérez
cd831ed5c4 vdpa: add asid parameter to vhost_vdpa_dma_map/unmap
So the caller can choose which ASID is destined.

No need to update the batch functions as they will always be called from
memory listener updates at the moment. Memory listener updates will
always update ASID 0, as it's the passthrough ASID.

All vhost devices's ASID are 0 at this moment.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221215113144.322011-10-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Eugenio Pérez
273e0003f0 vdpa: allocate SVQ array unconditionally
SVQ may run or not in a device depending on runtime conditions (for
example, if the device can move CVQ to its own group or not).

Allocate the SVQ array unconditionally at startup, since its hard to
move this allocation elsewhere.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221215113144.322011-9-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Eugenio Pérez
258a03941f vdpa: move SVQ vring features check to net/
The next patches will start control SVQ if possible. However, we don't
know if that will be possible at qemu boot anymore.

Since the moved checks will be already evaluated at net/ to know if it
is ok to shadow CVQ, move them.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221215113144.322011-8-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Eugenio Pérez
a585fad26b vdpa: request iova_range only once
Currently iova range is requested once per queue pair in the case of
net. Reduce the number of ioctls asking it once at initialization and
reusing that value for each vhost_vdpa.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20221215113144.322011-7-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasonwang@redhat.com>
2022-12-21 06:35:28 -05:00
Eugenio Pérez
5fde952bbd vhost: move iova_tree set to vhost_svq_start
Since we don't know if we will use SVQ at qemu initialization, let's
allocate iova_tree only if needed. To do so, accept it at SVQ start, not
at initialization.

This will avoid to create it if the device does not support SVQ.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221215113144.322011-5-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Eugenio Pérez
3cfb4d069c vhost: allocate SVQ device file descriptors at device start
The next patches will start control SVQ if possible. However, we don't
know if that will be possible at qemu boot anymore.

Delay device file descriptors until we know it at device start. This
will avoid to create them if the device does not support SVQ.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221215113144.322011-4-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Eugenio Pérez
20e7412bfd vhost: set SVQ device call handler at SVQ start
By the end of this series CVQ is shadowed as long as the features
support it.

Since we don't know at the beginning of qemu running if this is
supported, move the event notifier handler setting to the start of the
SVQ, instead of the start of qemu run. This will avoid to create them if
the device does not support SVQ.

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221215113144.322011-3-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Eugenio Pérez
712c1a3171 vdpa: use v->shadow_vqs_enabled in vhost_vdpa_svqs_start & stop
This function used to trust in v->shadow_vqs != NULL to know if it must
start svq or not.

This is not going to be valid anymore, as qemu is going to allocate svq
array unconditionally (but it will only start them conditionally).

Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221215113144.322011-2-eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Longpeng
dd18a23002 vdpa-dev: mark the device as unmigratable
The generic vDPA device doesn't support migration currently, so
mark it as unmigratable temporarily.

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221215134944.2809-5-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Longpeng
fedda61746 vdpa: add vdpa-dev-pci support
Supports vdpa-dev-pci, we can use the device as follow:

-device vhost-vdpa-device-pci,vhostdev=/dev/vhost-vdpa-X

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221215134944.2809-4-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Longpeng
b430a2bd23 vdpa: add vdpa-dev support
Supports vdpa-dev, we can use the deivce directly:

-M microvm -m 512m -smp 2 -kernel ... -initrd ... -device \
vhost-vdpa-device,vhostdev=/dev/vhost-vdpa-x

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221215134944.2809-3-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Longpeng
2273324540 virtio: get class_id and pci device id by the virtio id
Add helpers to get the "Transitional PCI Device ID" and "class_id"
of the device specified by the "Virtio Device ID".

These helpers will be used to build the generic vDPA device later.

Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Longpeng <longpeng2@huawei.com>
Message-Id: <20221215134944.2809-2-longpeng2@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-21 06:35:28 -05:00
Peter Maydell
54da41834f hw/virtio: Convert TYPE_VIRTIO_PCI to 3-phase reset
Convert the TYPE_VIRTIO_PCI class to 3-phase reset.  This is
necessary so that we can convert the subclass TYPE_VIRTIO_VGA_BASE
also to 3-phase reset.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20221125115240.3005559-2-peter.maydell@linaro.org
2022-12-16 15:59:07 +00:00
Peter Maydell
48804eebd4 Miscellaneous patches for 2022-12-14
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Merge tag 'pull-misc-2022-12-14' of https://repo.or.cz/qemu/armbru into staging

Miscellaneous patches for 2022-12-14

# gpg: Signature made Wed 14 Dec 2022 15:23:02 GMT
# gpg:                using RSA key 354BC8B3D7EB2A6B68674E5F3870B400EB918653
# gpg:                issuer "armbru@redhat.com"
# gpg: Good signature from "Markus Armbruster <armbru@redhat.com>" [full]
# gpg:                 aka "Markus Armbruster <armbru@pond.sub.org>" [full]
# Primary key fingerprint: 354B C8B3 D7EB 2A6B 6867  4E5F 3870 B400 EB91 8653

* tag 'pull-misc-2022-12-14' of https://repo.or.cz/qemu/armbru:
  ppc4xx_sdram: Simplify sdram_ddr_size() to return
  block/vmdk: Simplify vmdk_co_create() to return directly
  cleanup: Tweak and re-run return_directly.cocci
  io: Tidy up fat-fingered parameter name
  qapi: Use returned bool to check for failure (again)
  sockets: Use ERRP_GUARD() where obviously appropriate
  qemu-config: Use ERRP_GUARD() where obviously appropriate
  qemu-config: Make config_parse_qdict() return bool
  monitor: Use ERRP_GUARD() in monitor_init()
  monitor: Simplify monitor_fd_param()'s error handling
  error: Move ERRP_GUARD() to the beginning of the function
  error: Drop a few superfluous ERRP_GUARD()
  error: Drop some obviously superfluous error_propagate()
  Drop more useless casts from void * to pointer

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2022-12-15 10:13:46 +00:00
Markus Armbruster
41462e4106 qapi virtio: Elide redundant has_FOO in generated C
The has_FOO for pointer-valued FOO are redundant, except for arrays.
They are also a nuisance to work with.  Recent commit "qapi: Start to
elide redundant has_FOO in generated C" provided the means to elide
them step by step.  This is the step for qapi/virtio.json.

Said commit explains the transformation in more detail.  The invariant
violations mentioned there do not occur here.

Cc: Laurent Vivier <lvivier@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-Id: <20221104160712.3005652-29-armbru@redhat.com>
2022-12-14 20:05:07 +01:00
Markus Armbruster
fe8ac1fa49 qapi machine: Elide redundant has_FOO in generated C
The has_FOO for pointer-valued FOO are redundant, except for arrays.
They are also a nuisance to work with.  Recent commit "qapi: Start to
elide redundant has_FOO in generated C" provided the means to elide
them step by step.  This is the step for qapi/machine*.json.

Said commit explains the transformation in more detail.  The invariant
violations mentioned there do not occur here.

Cc: Eduardo Habkost <eduardo@habkost.net>
Cc: Marcel Apfelbaum <marcel.apfelbaum@gmail.com>
Cc: Philippe Mathieu-Daudé <f4bug@amsat.org>
Cc: Yanan Wang <wangyanan55@huawei.com>
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221104160712.3005652-16-armbru@redhat.com>
2022-12-14 20:04:47 +01:00
Markus Armbruster
66997c42e0 cleanup: Tweak and re-run return_directly.cocci
Tweak the semantic patch to drop redundant parenthesis around the
return expression.

Coccinelle drops a comment in hw/rdma/vmw/pvrdma_cmd.c; restored
manually.

Coccinelle messes up vmdk_co_create(), not sure why.  Change dropped,
will be done manually in the next commit.

Line breaks in target/avr/cpu.h and hw/rdma/vmw/pvrdma_cmd.c tidied up
manually.

Whitespace in tools/virtiofsd/fuse_lowlevel.c tidied up manually.

checkpatch.pl complains "return of an errno should typically be -ve"
two times for hw/9pfs/9p-synth.c.  Preexisting, the patch merely makes
it visible to checkpatch.pl.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221122134917.1217307-2-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Acked-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2022-12-14 16:19:35 +01:00
Markus Armbruster
d1c81c3496 qapi: Use returned bool to check for failure (again)
Commit 012d4c96e2 changed the visitor functions taking Error ** to
return bool instead of void, and the commits following it used the new
return value to simplify error checking.  Since then a few more uses
in need of the same treatment crept in.  Do that.  All pretty
mechanical except for

* balloon_stats_get_all()

  This is basically the same transformation commit 012d4c96e2 applied
  to the virtual walk example in include/qapi/visitor.h.

* set_max_queue_size()

  Additionally replace "goto end of function" by return.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221121085054.683122-10-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2022-12-14 16:19:35 +01:00
Markus Armbruster
05e385d2a9 error: Move ERRP_GUARD() to the beginning of the function
include/qapi/error.h advises to put ERRP_GUARD() right at the
beginning of the function, because only then can it guard the whole
function.  Clean up the few spots disregarding the advice.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20221121085054.683122-4-armbru@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
2022-12-14 16:19:35 +01:00
Markus Armbruster
3d558330ad Drop more useless casts from void * to pointer
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Message-Id: <20221123133811.1398562-1-armbru@redhat.com>
2022-12-14 16:19:35 +01:00
Alex Bennée
71e076a07d hw/virtio: generalise CHR_EVENT_CLOSED handling
..and use for both virtio-user-blk and virtio-user-gpio. This avoids
the circular close by deferring shutdown due to disconnection until a
later point. virtio-user-blk already had this mechanism in place so
generalise it as a vhost-user helper function and use for both blk and
gpio devices.

While we are at it we also fix up vhost-user-gpio to re-establish the
event handler after close down so we can reconnect later.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <20221130112439.2527228-5-alex.bennee@linaro.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-01 02:30:13 -05:00
Alex Bennée
060f4a9440 hw/virtio: add started_vu status field to vhost-user-gpio
As per the fix to vhost-user-blk in f5b22d06fb (vhost: recheck dev
state in the vhost_migration_log routine) we really should track the
connection and starting separately.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20221130112439.2527228-4-alex.bennee@linaro.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-01 02:30:09 -05:00
Stefano Garzarella
4daa5054c5 vhost: enable vrings in vhost_dev_start() for vhost-user devices
Commit 02b61f38d3 ("hw/virtio: incorporate backend features in features")
properly negotiates VHOST_USER_F_PROTOCOL_FEATURES with the vhost-user
backend, but we forgot to enable vrings as specified in
docs/interop/vhost-user.rst:

    If ``VHOST_USER_F_PROTOCOL_FEATURES`` has not been negotiated, the
    ring starts directly in the enabled state.

    If ``VHOST_USER_F_PROTOCOL_FEATURES`` has been negotiated, the ring is
    initialized in a disabled state and is enabled by
    ``VHOST_USER_SET_VRING_ENABLE`` with parameter 1.

Some vhost-user front-ends already did this by calling
vhost_ops.vhost_set_vring_enable() directly:
- backends/cryptodev-vhost.c
- hw/net/virtio-net.c
- hw/virtio/vhost-user-gpio.c

But most didn't do that, so we would leave the vrings disabled and some
backends would not work. We observed this issue with the rust version of
virtiofsd [1], which uses the event loop [2] provided by the
vhost-user-backend crate where requests are not processed if vring is
not enabled.

Let's fix this issue by enabling the vrings in vhost_dev_start() for
vhost-user front-ends that don't already do this directly. Same thing
also in vhost_dev_stop() where we disable vrings.

[1] https://gitlab.com/virtio-fs/virtiofsd
[2] https://github.com/rust-vmm/vhost/blob/240fc2966/crates/vhost-user-backend/src/event_loop.rs#L217

Fixes: 02b61f38d3 ("hw/virtio: incorporate backend features in features")
Reported-by: German Maglione <gmaglione@redhat.com>
Tested-by: German Maglione <gmaglione@redhat.com>
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Acked-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Message-Id: <20221123131630.52020-1-sgarzare@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20221130112439.2527228-3-alex.bennee@linaro.org>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-12-01 02:30:04 -05:00
Michael S. Tsirkin
b7c61789e6 virtio: disable error for out of spec queue-enable
Virtio 1.0 is pretty clear that features have to be
negotiated before enabling VQs. Unfortunately Seabios
ignored this ever since gaining 1.0 support (UEFI is ok).
Comment the error out for now, and add a TODO.

Fixes: 3c37f8b8d1 ("virtio: introduce virtio_queue_enable()")
Cc: "Kangjie Xu" <kangjie.xu@linux.alibaba.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20221121200339.362452-1-mst@redhat.com>
2022-11-22 05:19:00 -05:00
Stefano Garzarella
562a7d23bf vhost: mask VIRTIO_F_RING_RESET for vhost and vhost-user devices
Commit 69e1c14aa2 ("virtio: core: vq reset feature negotation support")
enabled VIRTIO_F_RING_RESET by default for all virtio devices.

This feature is not currently emulated by QEMU, so for vhost and
vhost-user devices we need to make sure it is supported by the offloaded
device emulation (in-kernel or in another process).
To do this we need to add VIRTIO_F_RING_RESET to the features bitmap
passed to vhost_get_features(). This way it will be masked if the device
does not support it.

This issue was initially discovered with vhost-vsock and vhost-user-vsock,
and then also tested with vhost-user-rng which confirmed the same issue.
They fail when sending features through VHOST_SET_FEATURES ioctl or
VHOST_USER_SET_FEATURES message, since VIRTIO_F_RING_RESET is negotiated
by the guest (Linux >= v6.0), but not supported by the device.

Fixes: 69e1c14aa2 ("virtio: core: vq reset feature negotation support")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1318
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20221121101101.29400-1-sgarzare@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Acked-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Acked-by: Jason Wang <jasowang@redhat.com>
2022-11-22 05:19:00 -05:00
Alex Bennée
259d69c00b hw/virtio: introduce virtio_device_should_start
The previous fix to virtio_device_started revealed a problem in its
use by both the core and the device code. The core code should be able
to handle the device "starting" while the VM isn't running to handle
the restoration of migration state. To solve this duel use introduce a
new helper for use by the vhost-user backends who all use it to feed a
should_start variable.

We can also pick up a change vhost_user_blk_set_status while we are at
it which follows the same pattern.

Fixes: 9f6bcfd99f (hw/virtio: move vm_running check to virtio_device_started)
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Message-Id: <20221107121407.1010913-1-alex.bennee@linaro.org>
2022-11-07 14:08:18 -05:00
Yajun Wu
923b8921d2 vhost-user: Support vhost_dev_start
The motivation of adding vhost-user vhost_dev_start support is to
improve backend configuration speed and reduce live migration VM
downtime.

Today VQ configuration is issued one by one. For virtio net with
multi-queue support, backend needs to update RSS (Receive side
scaling) on every rx queue enable. Updating RSS is time-consuming
(typical time like 7ms).

Implement already defined vhost status and message in the vhost
specification [1].
(a) VHOST_USER_PROTOCOL_F_STATUS
(b) VHOST_USER_SET_STATUS
(c) VHOST_USER_GET_STATUS

Send message VHOST_USER_SET_STATUS with VIRTIO_CONFIG_S_DRIVER_OK for
device start and reset(0) for device stop.

On reception of the DRIVER_OK message, backend can apply the needed setting
only once (instead of incremental) and also utilize parallelism on enabling
queues.

This improves QEMU's live migration downtime with vhost user backend
implementation by great margin, specially for the large number of VQs of 64
from 800 msec to 250 msec.

[1] https://qemu-project.gitlab.io/qemu/interop/vhost-user.html

Signed-off-by: Yajun Wu <yajunw@nvidia.com>
Acked-by: Parav Pandit <parav@nvidia.com>
Message-Id: <20221017064452.1226514-3-yajunw@nvidia.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 14:08:17 -05:00
Akihiko Odaki
15377f6e79 msix: Assert that specified vector is in range
There were several different ways to deal with the situation where the
vector specified for a msix function is out of bound:
- early return a function and keep progresssing
- propagate the error to the caller
- mark msix unusable
- assert it is in bound
- just ignore

An out-of-bound vector should not be specified if the device
implementation is correct so let msix functions always assert that the
specified vector is in range.

An exceptional case is virtio-pci, which allows the guest to configure
vectors. For virtio-pci, it is more appropriate to introduce its own
checks because it is sometimes too late to check the vector range in
msix functions.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Message-Id: <20220829083524.143640-1-akihiko.odaki@daynix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Yuval Shaia <yuval.shaia.ml@gmail.com>
Signed-off-by: Akihiko Odaki &lt;<a href="mailto:akihiko.odaki@daynix.com" target="_blank">akihiko.odaki@daynix.com</a>&gt;<br>
2022-11-07 14:08:17 -05:00
Yajun Wu
bd437c960f vhost-user: Fix out of order vring host notification handling
vhost backend sends host notification for every VQ. If backend creates
VQs in parallel, the VHOST_USER_SLAVE_VRING_HOST_NOTIFIER_MSG may
arrive to QEMU in different order than incremental queue index order.

For example VQ 1's message arrive earlier than VQ 0's:
After alloc VhostUserHostNotifier for VQ 1. GPtrArray becomes

    [ nil, VQ1 pointer ]

After alloc VhostUserHostNotifier for VQ 0. GPtrArray becomes

    [ VQ0 pointer, nil, VQ1 pointer ]

This is wrong. fetch_notifier will return NULL for VQ 1 in
vhost_user_get_vring_base, causes host notifier miss removal(leak).

The fix is to remove current element from GPtrArray, make the right
position for element to insert.

Fixes: 503e355465 ("virtio/vhost-user: dynamically assign VhostUserHostNotifiers")
Signed-off-by: Yajun Wu <yajunw@nvidia.com>
Acked-by: Parav Pandit <parav@nvidia.com>

Message-Id: <20221018023651.1359420-1-yajunw@nvidia.com>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:20 -05:00
David Daney
9ea02e8f13 virtio-rng-pci: Allow setting nvectors, so we can use MSI-X
Most other virtio-pci devices allow MSI-X, let's have it for rng too.

Signed-off-by: David Daney <david.daney@fungible.com>
Reviewed-by: Marcin Nowakowski <marcin.nowakowski@fungible.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@fungible.com>
Message-Id: <20221014160947.66105-1-philmd@fungible.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:20 -05:00
Kangjie Xu
e1f101d9f6 vhost: expose vhost_virtqueue_stop()
Expose vhost_virtqueue_stop(), we need to use it when resetting a
virtqueue.

Signed-off-by: Kangjie Xu <kangjie.xu@linux.alibaba.com>
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221017092558.111082-9-xuanzhuo@linux.alibaba.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:20 -05:00
Kangjie Xu
ff48b62809 vhost: expose vhost_virtqueue_start()
Expose vhost_virtqueue_start(), we need to use it when restarting a
virtqueue.

Signed-off-by: Kangjie Xu <kangjie.xu@linux.alibaba.com>
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221017092558.111082-8-xuanzhuo@linux.alibaba.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:20 -05:00
Kangjie Xu
d1060e3dc5 virtio-pci: support queue enable
PCI devices support device specific vq enable.

Based on this function, the driver can re-enable the virtqueue after the
virtqueue is reset.

Signed-off-by: Kangjie Xu <kangjie.xu@linux.alibaba.com>
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221017092558.111082-7-xuanzhuo@linux.alibaba.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:20 -05:00
Xuan Zhuo
805d782d28 virtio-pci: support queue reset
PCI devices support vq reset.

Based on this function, the driver can adjust the size of the ring, and
quickly recycle the buffer in the ring.

The migration of the virtio devices will not happen during a reset
operation. This is becuase the global iothread lock is held. Migration
thread also needs the lock. As a result, when migration of virtio
devices starts, the 'reset' status of VirtIOPCIQueue will always be 0.
Thus, we do not need to add it in vmstate_virtio_pci_modern_queue_state.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Signed-off-by: Kangjie Xu <kangjie.xu@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221017092558.111082-6-xuanzhuo@linux.alibaba.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:20 -05:00
Kangjie Xu
3c37f8b8d1 virtio: introduce virtio_queue_enable()
Introduce the interface queue_enable() in VirtioDeviceClass and the
fucntion virtio_queue_enable() in virtio, it can be called when
VIRTIO_PCI_COMMON_Q_ENABLE is written and related virtqueue can be
started. It only supports the devices of virtio 1 or later. The
not-supported devices can only start the virtqueue when DRIVER_OK.

Signed-off-by: Kangjie Xu <kangjie.xu@linux.alibaba.com>
Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221017092558.111082-4-xuanzhuo@linux.alibaba.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:20 -05:00
Xuan Zhuo
b3a8d6f431 virtio: introduce virtio_queue_reset()
Introduce a new interface function virtio_queue_reset() to implement
reset for vq.

Add a new callback to VirtioDeviceClass for queue reset operation for
each child device.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221017092558.111082-3-xuanzhuo@linux.alibaba.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:19 -05:00
Xuan Zhuo
3b43302c71 virtio: introduce __virtio_queue_reset()
Separate the logic of vq reset. This logic will be called directly
later.

Signed-off-by: Xuan Zhuo <xuanzhuo@linux.alibaba.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20221017092558.111082-2-xuanzhuo@linux.alibaba.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:19 -05:00
Eric Auger
e72cfabf4e hw/virtio/virtio-iommu-pci: Enforce the device is plugged on the root bus
In theory the virtio-iommu-pci could be plugged anywhere in the PCIe
topology and as long as the dt/acpi info are properly built this should
work. However at the moment we fail to do that because the
virtio-iommu-pci BDF is not computed at plug time and in that case
vms->virtio_iommu_bdf gets an incorrect value.

For instance if the virtio-iommu-pci is plugged onto a pcie root port
and the virtio-iommu protects a virtio-block-pci device the guest does
not boot.

So let's do not pretend we do support this case and fail the initialize()
if we detect the virtio-iommu-pci is plugged anywhere else than on the
root bus. Anyway this ability is not needed.

Signed-off-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20221012163448.121368-1-eric.auger@redhat.com>
Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Tested-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-07 13:12:19 -05:00
Lei He
2fda101de0 virtio-crypto: Support asynchronous mode
virtio-crypto: Modify the current interface of virtio-crypto
device to support asynchronous mode.

Signed-off-by: lei he <helei.sig11@bytedance.com>
Message-Id: <20221008085030.70212-2-helei.sig11@bytedance.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-11-02 06:56:32 -04:00
Stefan Hajnoczi
7208429223 Hi,
"Host Memory Backends" and "Memory devices" queue ("mem"):
 - Fix NVDIMM error message
 - Add ThreadContext user-creatable object and wire it up for NUMA-aware
   hostmem preallocation
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Merge tag 'mem-2022-10-28' of https://github.com/davidhildenbrand/qemu into staging

Hi,

"Host Memory Backends" and "Memory devices" queue ("mem"):
- Fix NVDIMM error message
- Add ThreadContext user-creatable object and wire it up for NUMA-aware
  hostmem preallocation

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# -----END PGP SIGNATURE-----
# gpg: Signature made Fri 28 Oct 2022 05:44:16 EDT
# gpg:                using RSA key 1BD9CAAD735C4C3A460DFCCA4DDE10F700FF835A
# gpg:                issuer "david@redhat.com"
# gpg: Good signature from "David Hildenbrand <david@redhat.com>" [unknown]
# gpg:                 aka "David Hildenbrand <davidhildenbrand@gmail.com>" [full]
# gpg:                 aka "David Hildenbrand <hildenbr@in.tum.de>" [unknown]
# gpg: WARNING: The key's User ID is not certified with a trusted signature!
# gpg:          There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 1BD9 CAAD 735C 4C3A 460D  FCCA 4DDE 10F7 00FF 835A

* tag 'mem-2022-10-28' of https://github.com/davidhildenbrand/qemu:
  vl: Allow ThreadContext objects to be created before the sandbox option
  hostmem: Allow for specifying a ThreadContext for preallocation
  util: Make qemu_prealloc_mem() optionally consume a ThreadContext
  util: Add write-only "node-affinity" property for ThreadContext
  util: Introduce ThreadContext user-creatable object
  util: Introduce qemu_thread_set_affinity() and qemu_thread_get_affinity()
  util: Cleanup and rename os_mem_prealloc()
  hw/mem/nvdimm: fix error message for 'unarmed' flag

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2022-10-30 18:31:59 -04:00
Eugenio Pérez
396d512669 vhost: Accept event idx flag
Enabling all the code path created before.

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2022-10-28 13:28:52 +08:00
Eugenio Pérez
22a6840ff2 vhost: use avail event idx on vhost_svq_kick
So SVQ code knows if an event is needed.

The code is not reachable at the moment.

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2022-10-28 13:28:52 +08:00
Eugenio Pérez
01f8beacea vhost: toggle device callbacks using used event idx
Actually use the new field of the used ring and tell the device if SVQ
wants to be notified.

The code is not reachable at the moment.

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2022-10-28 13:28:52 +08:00
Eugenio Pérez
f0c48e05bd vhost: allocate event_idx fields on vring
There was not enough room to accomodate them.

Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
2022-10-28 13:28:52 +08:00
David Hildenbrand
e04a34e55c util: Make qemu_prealloc_mem() optionally consume a ThreadContext
... and implement it under POSIX. When a ThreadContext is provided,
create new threads via the context such that these new threads obtain a
properly configured CPU affinity.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Message-Id: <20221014134720.168738-6-david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
2022-10-27 11:00:56 +02:00
David Hildenbrand
6556aadc18 util: Cleanup and rename os_mem_prealloc()
Let's
* give the function a "qemu_*" style name
* make sure the parameters in the implementation match the prototype
* rename smp_cpus to max_threads, which makes the semantics of that
  parameter clearer

... and add a function documentation.

Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Message-Id: <20221014134720.168738-2-david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
2022-10-27 11:00:28 +02:00
Bin Meng
c1dadb8462 treewide: Remove the unnecessary space before semicolon
%s/return ;/return;

Signed-off-by: Bin Meng <bmeng@tinylab.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Christian Schoenebeck <qemu_oss@crudebyte.com>
Message-Id: <20221024072802.457832-1-bmeng@tinylab.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
2022-10-24 13:41:10 +02:00
Stefan Hajnoczi
2ba341b369 pci: cleanup virtio ids.
audio: bugfixes and latency improvements.
 misc fixes for hw/display and ui
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Merge tag 'kraxel-20221013-pull-request' of https://gitlab.com/kraxel/qemu into staging

pci: cleanup virtio ids.
audio: bugfixes and latency improvements.
misc fixes for hw/display and ui

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# gpg: Signature made Thu 13 Oct 2022 02:51:55 EDT
# gpg:                using RSA key A0328CFFB93A17A79901FE7D4CB6D8EED3E87138
# gpg: Good signature from "Gerd Hoffmann (work) <kraxel@redhat.com>" [full]
# gpg:                 aka "Gerd Hoffmann <gerd@kraxel.org>" [full]
# gpg:                 aka "Gerd Hoffmann (private) <kraxel@gmail.com>" [full]
# Primary key fingerprint: A032 8CFF B93A 17A7 9901  FE7D 4CB6 D8EE D3E8 7138

* tag 'kraxel-20221013-pull-request' of https://gitlab.com/kraxel/qemu: (26 commits)
  audio: improve out.voices test
  audio: fix in.voices test
  gtk: Add show_menubar=on|off command line option.
  qemu-edid: Restrict input parameter -d to avoid division by zero
  ui/gtk: Fix the implicit mouse ungrabbing logic
  pci-ids: document modern virtio-pci ids in pci.h too
  pci-ids: drop list of modern virtio devices
  pci-ids: drop PCI_DEVICE_ID_VIRTIO_PMEM
  pci-ids: drop PCI_DEVICE_ID_VIRTIO_MEM
  pci-ids: drop PCI_DEVICE_ID_VIRTIO_IOMMU
  docs: add firmware feature flags
  cirrus_vga: fix potential memory overflow
  ui/gtk-egl: egl context needs to be unbound in the end of gd_egl_switch
  ui/vnc-clipboard: fix integer underflow in vnc_client_cut_text_ext
  audio: prevent an integer overflow in resampling code
  audio: fix sw->buf size for audio recording
  audio: refactor audio_get_avail()
  audio: rename audio_sw_bytes_free()
  audio: swap audio_rate_get_bytes() function parameters
  spiceaudio: update comment
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2022-10-13 13:55:53 -04:00
Gerd Hoffmann
0468fe82d3 pci-ids: document modern virtio-pci ids in pci.h too
While being at it add a #define for the magic 0x1040 number.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20221004112100.301935-6-kraxel@redhat.com>
2022-10-12 12:01:11 +02:00
Gerd Hoffmann
cbd56573f7 pci-ids: drop PCI_DEVICE_ID_VIRTIO_PMEM
Not needed for a virtio 1.0 device.  virtio_pci_device_plugged()
overrides them anyway (so no functional change).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Pankaj Gupta <pankaj.gupta@amd.com>
Tested-by: Pankaj Gupta <pankaj.gupta@amd.com>
Message-Id: <20221004112100.301935-4-kraxel@redhat.com>
2022-10-12 12:01:11 +02:00
Gerd Hoffmann
58de96e2eb pci-ids: drop PCI_DEVICE_ID_VIRTIO_MEM
Not needed for a virtio 1.0 device.  virtio_pci_device_plugged()
overrides them anyway (so no functional change).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20221004112100.301935-3-kraxel@redhat.com>
2022-10-12 12:01:11 +02:00
Gerd Hoffmann
c82190fa1b pci-ids: drop PCI_DEVICE_ID_VIRTIO_IOMMU
Not needed for a virtio 1.0 device.  virtio_pci_device_plugged()
overrides them anyway (so no functional change).

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Tested-by: Eric Auger <eric.auger@redhat.com>
Message-Id: <20221004112100.301935-2-kraxel@redhat.com>
2022-10-12 12:01:11 +02:00
Laurent Vivier
1ee7bb5bef qmp: add QMP command x-query-virtio-queue-element
This new command shows the information of a VirtQueue element.

[Note: Up until v10 of this patch series, virtio.json had many (15+)
 enums defined (e.g. decoded device features, statuses, etc.). In v10
 most of these enums were removed and replaced with string literals.
 By doing this we get (1) simpler schema, (2) smaller generated code,
 and (3) less maintenance burden for when new things are added (e.g.
 devices, device features, etc.).]

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <1660220684-24909-6-git-send-email-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-09 16:38:45 -04:00
Laurent Vivier
07536ddda7 qmp: add QMP commands for virtio/vhost queue-status
These new commands show the internal status of a VirtIODevice's
VirtQueue and a vhost device's vhost_virtqueue (if active).

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <1660220684-24909-5-git-send-email-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-09 16:38:45 -04:00
Laurent Vivier
f3034ad71f qmp: decode feature & status bits in virtio-status
Display feature names instead of bitmaps for host, guest, and
backend for VirtIODevices.

Display status names instead of bitmaps for VirtIODevices.

Display feature names instead of bitmaps for backend, protocol,
acked, and features (hdev->features) for vhost devices.

Decode features according to device ID. Decode statuses
according to configuration status bitmap (config_status_map).
Decode vhost user protocol features according to vhost user
protocol bitmap (vhost_user_protocol_map).

Transport features are on the first line. Undecoded bits (if
any) are stored in a separate field.

[Jonah: Several changes made to this patch from prev. version (v14):
 - Moved all device features mappings to hw/virtio/virtio.c
 - Renamed device features mappings (less generic)
 - Generalized @FEATURE_ENTRY macro for all device mappings
 - Virtio device feature map definitions include descriptions of
   feature bits
 - Moved @VHOST_USER_F_PROTOCOL_FEATURES feature bit from transport
   feature map to vhost-user-supported device feature mappings
   (blk, fs, i2c, rng, net, gpu, input, scsi, vsock)
 - New feature bit added for virtio-vsock: @VIRTIO_VSOCK_F_SEQPACKET
 - New feature bit added for virtio-iommu: @VIRTIO_IOMMU_F_BYPASS_CONFIG
 - New feature bit added for virtio-mem: @VIRTIO_MEM_F_UNPLUGGED_INACCESSIBLE
 - New virtio transport feature bit added: @VIRTIO_F_IN_ORDER
 - Added device feature map definition for virtio-rng
]

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <1660220684-24909-4-git-send-email-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-09 16:38:45 -04:00
Laurent Vivier
90c066cd68 qmp: add QMP command x-query-virtio-status
This new command shows the status of a VirtIODevice, including
its corresponding vhost device's status (if active).

Next patch will improve output by decoding feature bits, including
vhost device's feature bits (backend, protocol, acked, and features).
Also will decode status bits of a VirtIODevice.

[Jonah: From patch v12; added a check to @virtio_device_find to ensure
 synchronicity between @virtio_list and the devices in the QOM
 composition tree.]

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <1660220684-24909-3-git-send-email-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-09 16:38:45 -04:00
Laurent Vivier
a5ebce3857 qmp: add QMP command x-query-virtio
This new command lists all the instances of VirtIODevices with
their canonical QOM path and name.

[Jonah: @virtio_list duplicates information that already exists in
 the QOM composition tree. However, extracting necessary information
 from this tree seems to be a bit convoluted.

 Instead, we still create our own list of realized virtio devices
 but use @qmp_qom_get with the device's canonical QOM path to confirm
 that the device exists and is realized. If the device exists but
 is actually not realized, then we remove it from our list (for
 synchronicity to the QOM composition tree).

 Also, the QMP command @x-query-virtio is redundant as @qom-list
 and @qom-get are sufficient to search '/machine/' for realized
 virtio devices. However, @x-query-virtio is much more convenient
 in listing realized virtio devices.]

Signed-off-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <1660220684-24909-2-git-send-email-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-09 16:38:45 -04:00
Daniil Tatianin
d74c30c811 virtio: introduce VirtIOConfigSizeParams & virtio_get_config_size
This is the first step towards moving all device config size calculation
logic into the virtio core code. In particular, this adds a struct that
contains all the necessary information for common virtio code to be able
to calculate the final config size for a device. This is expected to be
used with the new virtio_get_config_size helper, which calculates the
final length based on the provided host features.

This builds on top of already existing code like VirtIOFeature and
virtio_feature_get_config_size(), but adds additional fields, as well as
sanity checking so that device-specifc code doesn't have to duplicate it.

An example usage would be:

    static const VirtIOFeature dev_features[] = {
        {.flags = 1ULL << FEATURE_1_BIT,
         .end = endof(struct virtio_dev_config, feature_1)},
        {.flags = 1ULL << FEATURE_2_BIT,
         .end = endof(struct virtio_dev_config, feature_2)},
        {}
    };

    static const VirtIOConfigSizeParams dev_cfg_size_params = {
        .min_size = DEV_BASE_CONFIG_SIZE,
        .max_size = sizeof(struct virtio_dev_config),
        .feature_sizes = dev_features
    };

    // code inside my_dev_device_realize()
    size_t config_size = virtio_get_config_size(&dev_cfg_size_params,
                                                host_features);
    virtio_init(vdev, VIRTIO_ID_MYDEV, config_size);

Currently every device is expected to write its own boilerplate from the
example above in device_realize(), however, the next step of this
transition is moving VirtIOConfigSizeParams into VirtioDeviceClass,
so that it can be done automatically by the virtio initialization code.

All of the users of virtio_feature_get_config_size have been converted
to use virtio_get_config_size so it's no longer needed and is removed
with this commit.

Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Message-Id: <20220906073111.353245-2-d-tatianin@yandex-team.ru>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-07 09:41:51 -04:00
Viresh Kumar
25c60a4612 hw/virtio: add vhost-user-gpio-pci boilerplate
This allows is to instantiate a vhost-user-gpio device as part of a PCI
bus. It is mostly boilerplate which looks pretty similar to the
vhost-user-fs-pci device.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <5f560cab92d0d789b1c94295ec74b9952907d69d.1641987128.git.viresh.kumar@linaro.org>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

Message-Id: <20220802095010.3330793-14-alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-07 09:41:51 -04:00
Viresh Kumar
27ba7b027f hw/virtio: add boilerplate for vhost-user-gpio device
This creates the QEMU side of the vhost-user-gpio device which connects
to the remote daemon. It is based of vhost-user-i2c code.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <5390324a748194a21bc99b1538e19761a8c64092.1641987128.git.viresh.kumar@linaro.org>
[AJB: fixes for qtest, tweaks to feature bits]
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Cc: Vincent Whitchurch <vincent.whitchurch@axis.com>

Message-Id: <20220802095010.3330793-13-alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-07 09:41:51 -04:00
Alex Bennée
b8f3e6a18d hw/virtio: move vhd->started check into helper and add FIXME
The `started` field is manipulated internally within the vhost code
except for one place, vhost-user-blk via f5b22d06fb (vhost: recheck
dev state in the vhost_migration_log routine). Mark that as a FIXME
because it introduces a potential race. I think the referenced fix
should be tracking its state locally.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220802095010.3330793-12-alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Raphael Norwitz <raphael.norwittz@nutanix.com>
2022-10-07 09:41:51 -04:00
Alex Bennée
9f6bcfd99f hw/virtio: move vm_running check to virtio_device_started
All the boilerplate virtio code does the same thing (or should at
least) of checking to see if the VM is running before attempting to
start VirtIO. Push the logic up to the common function to avoid
getting a copy and paste wrong.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20220802095010.3330793-11-alex.bennee@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-10-07 09:41:51 -04:00