Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging

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Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging

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# gpg: Signature made Tue 26 Nov 2024 03:57:24 GMT
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# gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@redhat.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 215D 46F4 8246 689E C77F 3562 EF04 965B 398D 6211

* tag 'net-pull-request' of https://github.com/jasowang/qemu:
virtio-net: Add queues before loading them

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

virtio-net: Add queues before loading them

Call virtio_net_set_multiqueue() to add queues before loading their
states. Otherwise the loaded queues will not have handlers and elements
in them will no

virtio-net: Add queues before loading them

Call virtio_net_set_multiqueue() to add queues before loading their
states. Otherwise the loaded queues will not have handlers and elements
in them will not be processed.

Cc: qemu-stable@nongnu.org
Fixes: 8c49756825da ("virtio-net: Add only one queue pair when realizing")
Reported-by: Laurent Vivier <lvivier@redhat.com>
Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

show more ...

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: features, fixes, cleanups

i286 acpi speedup by precomputing _PRT by Ricardo Ribalda
vhost_ne

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: features, fixes, cleanups

i286 acpi speedup by precomputing _PRT by Ricardo Ribalda
vhost_net speedup by using MR transactions by Zuo Boqun
ich9 gained support for periodic and swsmi timer by Dominic Prinz

Fixes, cleanups all over the place.

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

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# gpg: Signature made Wed 11 Sep 2024 14:50:29 BST
# gpg: using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg: issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67
# Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469

* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu:
hw/acpi/ich9: Add periodic and swsmi timer
virtio-mem: don't warn about THP sizes on a kernel without THP support
hw/audio/virtio-sound: fix heap buffer overflow
hw/cxl: fix physical address field in get scan media results output
virtio-pci: Add lookup subregion of VirtIOPCIRegion MR
vhost_net: configure all host notifiers in a single MR transaction
tests/acpi: pc: update golden masters for DSDT
hw/i386/acpi-build: Return a pre-computed _PRT table
tests/acpi: pc: allow DSDT acpi table changes
intel_iommu: Make PASID-cache and PIOTLB type invalid in legacy mode
intel_iommu: Fix invalidation descriptor type field
virtio: rename virtio_split_packed_update_used_idx
hw/pci/pci-hmp-cmds: Avoid displaying bogus size in 'info pci'
pci: don't skip function 0 occupancy verification for devfn auto assign
hw/isa/vt82c686.c: Embed i8259 irq in device state instead of allocating
hw: Move declaration of IRQState to header and add init function
virtio: Always reset vhost devices
virtio: Allow .get_vhost() without vhost_started

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

virtio: rename virtio_split_packed_update_used_idx

virtio_split_packed_update_used_idx should be
virtio_queue_split_update_used_idx like
virtio_split_packed_update_used_idx.

Signed-off-by: Wenyu Hu

virtio: rename virtio_split_packed_update_used_idx

virtio_split_packed_update_used_idx should be
virtio_queue_split_update_used_idx like
virtio_split_packed_update_used_idx.

Signed-off-by: Wenyu Huang <huangwenyuu@outlook.com>
Message-Id: <TYBP286MB036536B9015994AA5F3E4495ACB22@TYBP286MB0365.JPNP286.PROD.OUTLOOK.COM>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

virtio: Always reset vhost devices

Requiring `vhost_started` to be true for resetting vhost devices in
`virtio_reset()` seems like the wrong condition: Most importantly, the
preceding `virtio_set_st

virtio: Always reset vhost devices

Requiring `vhost_started` to be true for resetting vhost devices in
`virtio_reset()` seems like the wrong condition: Most importantly, the
preceding `virtio_set_status(vdev, 0)` call will (for vhost devices) end
up in `vhost_dev_stop()` (through vhost devices' `.set_status`
implementations), setting `vdev->vhost_started = false`. Therefore, the
gated `vhost_reset_device()` call is unreachable.

`vhost_started` is not documented, so it is hard to say what exactly it
is supposed to mean, but judging from the fact that `vhost_dev_start()`
sets it and `vhost_dev_stop()` clears it, it seems like it indicates
whether there is a vhost back-end, and whether that back-end is
currently running and processing virtio requests.

Making a reset conditional on whether the vhost back-end is processing
virtio requests seems wrong; in fact, it is probably better to reset it
only when it is not currently processing requests, which is exactly the
current order of operations in `virtio_reset()`: First, the back-end is
stopped through `virtio_set_status(vdev, 0)`, then we want to send a
reset.

Therefore, we should drop the `vhost_started` condition, but in its
stead we then have to verify that we can indeed send a reset to this
vhost device, by not just checking `k->get_vhost != NULL` (introduced by
commit 95e1019a4a9), but also that the vhost back-end is connected
(`hdev = k->get_vhost(); hdev != NULL && hdev->vhost_ops != NULL`).

Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Hanna Czenczek <hreitz@redhat.com>
Message-Id: <20240723163941.48775-3-hreitz@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging

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Merge tag 'net-pull-request' of https://github.com/jasowang/qemu into staging

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# gpg: Signature made Fri 02 Aug 2024 01:10:04 PM AEST
# gpg: using RSA key 215D46F48246689EC77F3562EF04965B398D6211
# gpg: Good signature from "Jason Wang (Jason Wang on RedHat) <jasowang@redhat.com>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
# gpg: There is no indication that the signature belongs to the owner.
# Primary key fingerprint: 215D 46F4 8246 689E C77F 3562 EF04 965B 398D 6211

* tag 'net-pull-request' of https://github.com/jasowang/qemu:
net: Reinstate '-net nic, model=help' output as documented in man page
net: update netdev stream man page with the reconnect parameter
net: update netdev dgram man page with unix socket
net: update netdev stream man page with unix socket
net: update netdev stream/dgram man page
virtio-net: Fix network stall at the host side waiting for kick
virtio-net: Ensure queue index fits with RSS
rtl8139: Fix behaviour for old kernels.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

virtio-net: Fix network stall at the host side waiting for kick

Patch 06b12970174 ("virtio-net: fix network stall under load")
added double-check to test whether the available buffer size
can satisf

virtio-net: Fix network stall at the host side waiting for kick

Patch 06b12970174 ("virtio-net: fix network stall under load")
added double-check to test whether the available buffer size
can satisfy the request or not, in case the guest has added
some buffers to the avail ring simultaneously after the first
check. It will be lucky if the available buffer size becomes
okay after the double-check, then the host can send the packet
to the guest. If the buffer size still can't satisfy the request,
even if the guest has added some buffers, viritio-net would
stall at the host side forever.

The patch enables notification and checks whether the guest has
added some buffers since last check of available buffers when
the available buffers are insufficient. If no buffer is added,
return false, else recheck the available buffers in the loop.
If the available buffers are sufficient, disable notification
and return true.

Changes:
1. Change the return type of virtqueue_get_avail_bytes() from void
to int, it returns an opaque that represents the shadow_avail_idx
of the virtqueue on success, else -1 on error.
2. Add a new API: virtio_queue_enable_notification_and_check(),
it takes an opaque as input arg which is returned from
virtqueue_get_avail_bytes(). It enables notification firstly,
then checks whether the guest has added some buffers since
last check of available buffers or not by virtio_queue_poll(),
return ture if yes.

The patch also reverts patch "06b12970174".

The case below can reproduce the stall.

Guest 0
+--------+
| iperf |
---------------> | server |
Host | +--------+
+--------+ | ...
| iperf |----
| client |---- Guest n
+--------+ | +--------+
| | iperf |
---------------> | server |
+--------+

Boot many guests from qemu with virtio network:
qemu ... -netdev tap,id=net_x \
-device virtio-net-pci-non-transitional,\
iommu_platform=on,mac=xx:xx:xx:xx:xx:xx,netdev=net_x

Each guest acts as iperf server with commands below:
iperf3 -s -D -i 10 -p 8001
iperf3 -s -D -i 10 -p 8002

The host as iperf client:
iperf3 -c guest_IP -p 8001 -i 30 -w 256k -P 20 -t 40000
iperf3 -c guest_IP -p 8002 -i 30 -w 256k -P 20 -t 40000

After some time, the host loses connection to the guest,
the guest can send packet to the host, but can't receive
packet from the host.

It's more likely to happen if SWIOTLB is enabled in the guest,
allocating and freeing bounce buffer takes some CPU ticks,
copying from/to bounce buffer takes more CPU ticks, compared
with that there is no bounce buffer in the guest.
Once the rate of producing packets from the host approximates
the rate of receiveing packets in the guest, the guest would
loop in NAPI.

receive packets ---
| |
v |
free buf virtnet_poll
| |
v |
add buf to avail ring ---
|
| need kick the host?
| NAPI continues
v
receive packets ---
| |
v |
free buf virtnet_poll
| |
v |
add buf to avail ring ---
|
v
... ...

On the other hand, the host fetches free buf from avail
ring, if the buf in the avail ring is not enough, the
host notifies the guest the event by writing the avail
idx read from avail ring to the event idx of used ring,
then the host goes to sleep, waiting for the kick signal
from the guest.

Once the guest finds the host is waiting for kick singal
(in virtqueue_kick_prepare_split()), it kicks the host.

The host may stall forever at the sequences below:

Host Guest
------------ -----------
fetch buf, send packet receive packet ---
... ... |
fetch buf, send packet add buf |
... add buf virtnet_poll
buf not enough avail idx-> add buf |
read avail idx add buf |
add buf ---
receive packet ---
write event idx ... |
wait for kick add buf virtnet_poll
... |
---
no more packet, exit NAPI

In the first loop of NAPI above, indicated in the range of
virtnet_poll above, the host is sending packets while the
guest is receiving packets and adding buffers.
step 1: The buf is not enough, for example, a big packet
needs 5 buf, but the available buf count is 3.
The host read current avail idx.
step 2: The guest adds some buf, then checks whether the
host is waiting for kick signal, not at this time.
The used ring is not empty, the guest continues
the second loop of NAPI.
step 3: The host writes the avail idx read from avail
ring to used ring as event idx via
virtio_queue_set_notification(q->rx_vq, 1).
step 4: At the end of the second loop of NAPI, recheck
whether kick is needed, as the event idx in the
used ring written by the host is beyound the
range of kick condition, the guest will not
send kick signal to the host.

Fixes: 06b12970174 ("virtio-net: fix network stall under load")
Cc: qemu-stable@nongnu.org
Signed-off-by: Wencheng Yang <east.moutain.yang@gmail.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>

show more ...

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pci,pc: features,fixes

pci: Initial support for SPDM Responders
cxl: Add support for scan media, fea

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pci,pc: features,fixes

pci: Initial support for SPDM Responders
cxl: Add support for scan media, feature commands, device patrol scrub
control, DDR5 ECS control, firmware updates
virtio: in-order support
virtio-net: support for SR-IOV emulation (note: known issues on s390,
might get reverted if not fixed)
smbios: memory device size is now configurable per Machine
cpu: architecture agnostic code to support vCPU Hotplug

Fixes, cleanups all over the place.

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

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# gpg: Signature made Tue 23 Jul 2024 10:16:31 AM AEST
# gpg: using RSA key 5D09FD0871C8F85B94CA8A0D281F0DB8D28D5469
# gpg: issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [undefined]
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>" [undefined]
# 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: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67
# Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469

* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (61 commits)
hw/nvme: Add SPDM over DOE support
backends: Initial support for SPDM socket support
hw/pci: Add all Data Object Types defined in PCIe r6.0
tests/acpi: Add expected ACPI AML files for RISC-V
tests/qtest/bios-tables-test.c: Enable basic testing for RISC-V
tests/acpi: Add empty ACPI data files for RISC-V
tests/qtest/bios-tables-test.c: Remove the fall back path
tests/acpi: update expected DSDT blob for aarch64 and microvm
acpi/gpex: Create PCI link devices outside PCI root bridge
tests/acpi: Allow DSDT acpi table changes for aarch64
hw/riscv/virt-acpi-build.c: Update the HID of RISC-V UART
hw/riscv/virt-acpi-build.c: Add namespace devices for PLIC and APLIC
virtio-iommu: Add trace point on virtio_iommu_detach_endpoint_from_domain
hw/vfio/common: Add vfio_listener_region_del_iommu trace event
virtio-iommu: Remove the end point on detach
virtio-iommu: Free [host_]resv_ranges on unset_iommu_devices
virtio-iommu: Remove probe_done
Revert "virtio-iommu: Clear IOMMUDevice when VFIO device is unplugged"
gdbstub: Add helper function to unregister GDB register space
physmem: Add helper function to destroy CPU AddressSpace
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

virtio: virtqueue_ordered_flush - VIRTIO_F_IN_ORDER support

Add VIRTIO_F_IN_ORDER feature support for the virtqueue_flush operation.

The goal of the virtqueue_ordered_flush operation when the
VIRTI

virtio: virtqueue_ordered_flush - VIRTIO_F_IN_ORDER support

Add VIRTIO_F_IN_ORDER feature support for the virtqueue_flush operation.

The goal of the virtqueue_ordered_flush operation when the
VIRTIO_F_IN_ORDER feature has been negotiated is to write elements to
the used/descriptor ring in-order and then update used_idx.

The function iterates through the VirtQueueElement used_elems array
in-order starting at vq->used_idx. If the element is valid (filled), the
element is written to the used/descriptor ring. This process continues
until we find an invalid (not filled) element.

For packed VQs, the first entry (at vq->used_idx) is written to the
descriptor ring last so the guest doesn't see any invalid descriptors.

If any elements were written, the used_idx is updated.

Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <20240710125522.4168043-5-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Eugenio Pérez <eperezma@redhat.com>

show more ...

virtio: virtqueue_ordered_fill - VIRTIO_F_IN_ORDER support

Add VIRTIO_F_IN_ORDER feature support for the virtqueue_fill operation.

The goal of the virtqueue_ordered_fill operation when the
VIRTIO_F

virtio: virtqueue_ordered_fill - VIRTIO_F_IN_ORDER support

Add VIRTIO_F_IN_ORDER feature support for the virtqueue_fill operation.

The goal of the virtqueue_ordered_fill operation when the
VIRTIO_F_IN_ORDER feature has been negotiated is to search for this
now-used element, set its length, and mark the element as filled in
the VirtQueue's used_elems array.

By marking the element as filled, it will indicate that this element has
been processed and is ready to be flushed, so long as the element is
in-order.

Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <20240710125522.4168043-4-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

virtio: virtqueue_pop - VIRTIO_F_IN_ORDER support

Add VIRTIO_F_IN_ORDER feature support in virtqueue_split_pop and
virtqueue_packed_pop.

VirtQueueElements popped from the available/descritpor ring

virtio: virtqueue_pop - VIRTIO_F_IN_ORDER support

Add VIRTIO_F_IN_ORDER feature support in virtqueue_split_pop and
virtqueue_packed_pop.

VirtQueueElements popped from the available/descritpor ring are added to
the VirtQueue's used_elems array in-order and in the same fashion as
they would be added the used and descriptor rings, respectively.

This will allow us to keep track of the current order, what elements
have been written, as well as an element's essential data after being
processed.

Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <20240710125522.4168043-3-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio: features,fixes

A bunch of improvements:
- vhost dirty log is now only scanned once, not once per de

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio: features,fixes

A bunch of improvements:
- vhost dirty log is now only scanned once, not once per device
- virtio and vhost now support VIRTIO_F_NOTIFICATION_DATA
- cxl gained DCD emulation support
- pvpanic gained shutdown support
- beginning of patchset for Generic Port Affinity Structure
- s3 support
- friendlier error messages when boot fails on some illegal configs
- for vhost-user, VHOST_USER_SET_LOG_BASE is now only sent once
- part of vhost-user support for any POSIX system -
not yet enabled due to qtest failures
- sr-iov VF setup code has been reworked significantly
- new tests, particularly for risc-v ACPI
- bugfixes

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

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# gpg: issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [undefined]
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>" [undefined]
# gpg: WARNING: This key is not certified with a trusted signature!
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# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67
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* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu: (85 commits)
hw/pci: Replace -1 with UINT32_MAX for romsize
pcie_sriov: Register VFs after migration
pcie_sriov: Remove num_vfs from PCIESriovPF
pcie_sriov: Release VFs failed to realize
pcie_sriov: Reuse SR-IOV VF device instances
pcie_sriov: Ensure VF function number does not overflow
pcie_sriov: Do not manually unrealize
hw/ppc/spapr_pci: Do not reject VFs created after a PF
hw/ppc/spapr_pci: Do not create DT for disabled PCI device
hw/pci: Rename has_power to enabled
virtio-iommu: Clear IOMMUDevice when VFIO device is unplugged
virtio: remove virtio_tswap16s() call in vring_packed_event_read()
hw/cxl/events: Mark cxl-add-dynamic-capacity and cxl-release-dynamic-capcity unstable
hw/cxl/events: Improve QMP interfaces and documentation for add/release dynamic capacity.
tests/data/acpi/rebuild-expected-aml.sh: Add RISC-V
pc-bios/meson.build: Add support for RISC-V in unpack_edk2_blobs
meson.build: Add RISC-V to the edk2-target list
tests/data/acpi/virt: Move ARM64 ACPI tables under aarch64/${machine} path
tests/data/acpi: Move x86 ACPI tables under x86/${machine} path
tests/qtest/bios-tables-test.c: Set "arch" for x86 tests
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

virtio: remove virtio_tswap16s() call in vring_packed_event_read()

Commit d152cdd6f6 ("virtio: use virtio accessor to access packed event")
switched using of address_space_read_cached() to virito_ld

virtio: remove virtio_tswap16s() call in vring_packed_event_read()

Commit d152cdd6f6 ("virtio: use virtio accessor to access packed event")
switched using of address_space_read_cached() to virito_lduw_phys_cached()
to access packed descriptor event.

When we used address_space_read_cached(), we needed to call
virtio_tswap16s() to handle the endianess of the field, but
virito_lduw_phys_cached() already handles it internally, so we no longer
need to call virtio_tswap16s() (as the commit had done for `off_wrap`,
but forgot for `flags`).

Fixes: d152cdd6f6 ("virtio: use virtio accessor to access packed event")
Cc: jasowang@redhat.com
Cc: qemu-stable@nongnu.org
Reported-by: Xoykie <xoykie@gmail.com>
Link: https://lore.kernel.org/qemu-devel/CAFU8RB_pjr77zMLsM0Unf9xPNxfr_--Tjr49F_eX32ZBc5o2zQ@mail.gmail.com
Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Message-Id: <20240701075208.19634-1-sgarzare@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

hw/virtio: Fix obtain the buffer id from the last descriptor

The virtio-1.3 specification
<https://docs.oasis-open.org/virtio/virtio/v1.3/virtio-v1.3.html> writes:
2.8.6 Next Flag: Descriptor Chaini

hw/virtio: Fix obtain the buffer id from the last descriptor

The virtio-1.3 specification
<https://docs.oasis-open.org/virtio/virtio/v1.3/virtio-v1.3.html> writes:
2.8.6 Next Flag: Descriptor Chaining
Buffer ID is included in the last descriptor in the list.

If the feature (_F_INDIRECT_DESC) has been negotiated, install only
one descriptor in the virtqueue.
Therefor the buffer id should be obtained from the first descriptor.

In descriptor chaining scenarios, the buffer id should be obtained
from the last descriptor.

Fixes: 86044b24e8 ("virtio: basic packed virtqueue support")

Signed-off-by: Wafer <wafer@jaguarmicro.com>
Reviewed-by: Jason Wang <jasowang@redhat.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20240510072753.26158-2-wafer@jaguarmicro.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

virtio: Prevent creation of device using notification-data with ioeventfd

Prevent the realization of a virtio device that attempts to use the
VIRTIO_F_NOTIFICATION_DATA transport feature without dis

virtio: Prevent creation of device using notification-data with ioeventfd

Prevent the realization of a virtio device that attempts to use the
VIRTIO_F_NOTIFICATION_DATA transport feature without disabling
ioeventfd.

Due to ioeventfd not being able to carry the extra data associated with
this feature, having both enabled is a functional mismatch and therefore
Qemu should not continue the device's realization process.

Although the device does not yet know if the feature will be
successfully negotiated, many devices using this feature wont actually
work without this extra data and would fail FEATURES_OK anyway.

If ioeventfd is able to work with the extra notification data in the
future, this compatibility check can be removed.

Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <20240315165557.26942-3-jonah.palmer@oracle.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

virtio/virtio-pci: Handle extra notification data

Add support to virtio-pci devices for handling the extra data sent
from the driver to the device when the VIRTIO_F_NOTIFICATION_DATA
transport featu

virtio/virtio-pci: Handle extra notification data

Add support to virtio-pci devices for handling the extra data sent
from the driver to the device when the VIRTIO_F_NOTIFICATION_DATA
transport feature has been negotiated.

The extra data that's passed to the virtio-pci device when this
feature is enabled varies depending on the device's virtqueue
layout.

In a split virtqueue layout, this data includes:
- upper 16 bits: shadow_avail_idx
- lower 16 bits: virtqueue index

In a packed virtqueue layout, this data includes:
- upper 16 bits: 1-bit wrap counter & 15-bit shadow_avail_idx
- lower 16 bits: virtqueue index

Signed-off-by: Jonah Palmer <jonah.palmer@oracle.com>
Message-Id: <20240315165557.26942-2-jonah.palmer@oracle.com>
Reviewed-by: Eugenio Pérez <eperezma@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

Merge tag 'accel-20240426' of https://github.com/philmd/qemu into staging

Accelerators patches

A lot of trivial cleanups and simplifications (moving methods around,
adding/removing #include stateme

Merge tag 'accel-20240426' of https://github.com/philmd/qemu into staging

Accelerators patches

A lot of trivial cleanups and simplifications (moving methods around,
adding/removing #include statements). Most notable changes:

- Rename NEED_CPU_H -> COMPILING_PER_TARGET
- Rename few template headers using the '.h.inc' suffix
- Extract some definitions / declarations into their own header:
- accel/tcg/user-retaddr.h (helper_retaddr)
- include/exec/abi_ptr.h (abi_ptr)
- include/exec/breakpoint.h (CPUBreakpoint, CPUWatchpoint)
- include/exec/mmu-access-type.h (MMUAccessType)
- include/user/tswap-target.h (tswapl, bswaptls)

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* tag 'accel-20240426' of https://github.com/philmd/qemu: (38 commits)
plugins: Include missing 'qemu/bitmap.h' header
hw/core: Avoid including the full 'hw/core/cpu.h' in 'tcg-cpu-ops.h'
exec: Move CPUTLBEntry helpers to cputlb.c
exec: Restrict inclusion of 'user/guest-base.h'
exec: Rename 'exec/user/guest-base.h' as 'user/guest-base.h'
exec: Restrict 'cpu_ldst.h' to TCG accelerator
exec: Restrict TCG specific declarations of 'cputlb.h'
exec: Declare CPUBreakpoint/CPUWatchpoint type in 'breakpoint.h' header
exec: Declare MMUAccessType type in 'mmu-access-type.h' header
exec: Declare abi_ptr type in its own 'abi_ptr.h' header
exec/user: Do not include 'cpu.h' in 'abitypes.h'
exec: Move [b]tswapl() declarations to 'exec/user/tswap-target.h'
exec: Declare target_words_bigendian() in 'exec/tswap.h'
exec/cpu-all: Remove unused tswapls() definitions
exec/cpu-all: Remove unused 'qemu/thread.h' header
exec/cpu-all: Reduce 'qemu/rcu.h' header inclusion
accel/hvf: Use accel-specific per-vcpu @dirty field
accel/nvmm: Use accel-specific per-vcpu @dirty field
accel/whpx: Use accel-specific per-vcpu @dirty field
accel/tcg: Rename helper-head.h -> helper-head.h.inc
...

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

exec: Declare target_words_bigendian() in 'exec/tswap.h'

We usually check target endianess before swapping values,
so target_words_bigendian() declaration makes sense in
"exec/tswap.h" with the targ

exec: Declare target_words_bigendian() in 'exec/tswap.h'

We usually check target endianess before swapping values,
so target_words_bigendian() declaration makes sense in
"exec/tswap.h" with the target swapping helpers.

Remove "hw/core/cpu.h" when it was only included to get
the target_words_bigendian() declaration.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Anton Johansson <anjo@rev.ng>
Message-Id: <20231212123401.37493-16-philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

show more ...

Merge tag 'hw-misc-20240410' of https://github.com/philmd/qemu into staging

Misc HW patch queue

- Fix CXL Fixed Memory Window interleave-granularity typo
- Fix for DMA re-entrancy abuse with VirtIO

Merge tag 'hw-misc-20240410' of https://github.com/philmd/qemu into staging

Misc HW patch queue

- Fix CXL Fixed Memory Window interleave-granularity typo
- Fix for DMA re-entrancy abuse with VirtIO devices (CVE-2024-3446)
- Fix out-of-bound access in NAND block buffer
- Fix memory leak in AppleSMC reset() handler
- Avoid VirtIO crypto backends abort o invalid session ID
- Fix overflow in LAN9118 MIL TX FIFO
- Fix overflow when abusing SDHCI TRNMOD register (CVE-2024-3447)
- Fix overrun in short fragmented packet SCTP checksum (CVE-2024-3567)
- Remove unused assignment in virtio-snd model (Coverity 1542933 & 1542934)

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* tag 'hw-misc-20240410' of https://github.com/philmd/qemu:
hw/audio/virtio-snd: Remove unused assignment
hw/net/net_tx_pkt: Fix overrun in update_sctp_checksum()
hw/sd/sdhci: Do not update TRNMOD when Command Inhibit (DAT) is set
hw/net/lan9118: Fix overflow in MIL TX FIFO
hw/net/lan9118: Replace magic '2048' value by MIL_TXFIFO_SIZE definition
backends/cryptodev: Do not abort for invalid session ID
hw/misc/applesmc: Fix memory leak in reset() handler
hw/misc/applesmc: Do not call DeviceReset from DeviceRealize
hw/block/nand: Fix out-of-bound access in NAND block buffer
hw/block/nand: Have blk_load() take unsigned offset and return boolean
hw/block/nand: Factor nand_load_iolen() method out
qemu-options: Fix CXL Fixed Memory Window interleave-granularity typo
hw/virtio/virtio-crypto: Protect from DMA re-entrancy bugs
hw/char/virtio-serial-bus: Protect from DMA re-entrancy bugs
hw/display/virtio-gpu: Protect from DMA re-entrancy bugs
hw/virtio: Introduce virtio_bh_new_guarded() helper

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

hw/virtio: Introduce virtio_bh_new_guarded() helper

Introduce virtio_bh_new_guarded(), similar to qemu_bh_new_guarded()
but using the transport memory guard, instead of the device one
(there can onl

hw/virtio: Introduce virtio_bh_new_guarded() helper

Introduce virtio_bh_new_guarded(), similar to qemu_bh_new_guarded()
but using the transport memory guard, instead of the device one
(there can only be one virtio device per virtio bus).

Inspired-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20240409105537.18308-2-philmd@linaro.org>

show more ...

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: bugfixes

Tiny fixes: important but mostly obvious ones. Revert VDPA network sim
for this re

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: bugfixes

Tiny fixes: important but mostly obvious ones. Revert VDPA network sim
for this release as there are questions around it's maintainatiblity.

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

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# gpg: issuer "mst@redhat.com"
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg: aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17 0970 C350 3912 AFBE 8E67
# Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA 8A0D 281F 0DB8 D28D 5469

* tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu:
qdev-monitor: fix error message in find_device_state()
vhost-user-blk: simplify and fix vhost_user_blk_handle_config_change
vdpa-dev: Fix the issue of device status not updating when configuration interruption is triggered
hw/virtio: Fix packed virtqueue flush used_idx
virtio-snd: rewrite invalid tx/rx message handling
virtio-snd: Enhance error handling for invalid transfers
Revert "hw/virtio: Add support for VDPA network simulation devices"

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

show more ...

hw/virtio: Fix packed virtqueue flush used_idx

In the event of writing many chains of descriptors, the device must
write just the id of the last buffer in the descriptor chain, skip
forward the numb

hw/virtio: Fix packed virtqueue flush used_idx

In the event of writing many chains of descriptors, the device must
write just the id of the last buffer in the descriptor chain, skip
forward the number of descriptors in the chain, and then repeat the
operations for the rest of chains.

Current QEMU code writes all the buffer ids consecutively, and then
skips all the buffers altogether. This is a bug, and can be reproduced
with a VirtIONet device with _F_MRG_RXBUB and without
_F_INDIRECT_DESC:

If a virtio-net device has the VIRTIO_NET_F_MRG_RXBUF feature
but not the VIRTIO_RING_F_INDIRECT_DESC feature,
'VirtIONetQueue->rx_vq' will use the merge feature
to store data in multiple 'elems'.
The 'num_buffers' in the virtio header indicates how many elements are merged.
If the value of 'num_buffers' is greater than 1,
all the merged elements will be filled into the descriptor ring.
The 'idx' of the elements should be the value of 'vq->used_idx' plus 'ndescs'.

Fixes: 86044b24e8 ("virtio: basic packed virtqueue support")
Acked-by: Eugenio Pérez <eperezma@redhat.com>
Signed-off-by: Wafer <wafer@jaguarmicro.com>
Message-Id: <20240407015451.5228-2-wafer@jaguarmicro.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

Revert "hw/virtio: Add support for VDPA network simulation devices"

This reverts commit cd341fd1ffded978b2aa0b5309b00be7c42e347c.

The patch adds non-upstream code in
include/standard-headers/linux/

Revert "hw/virtio: Add support for VDPA network simulation devices"

This reverts commit cd341fd1ffded978b2aa0b5309b00be7c42e347c.

The patch adds non-upstream code in
include/standard-headers/linux/virtio_pci.h
which would make maintainance harder.

Revert for now.

Suggested-by: Jason Wang <jasowang@redhat.com>
Message-Id: <df6b6b465753e754a19459e8cd61416548f89a42.1712569644.git.mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: features, cleanups, fixes

more memslots support in libvhost-user
support PCIe Gen5/Gen6 link

Merge tag 'for_upstream' of https://git.kernel.org/pub/scm/virt/kvm/mst/qemu into staging

virtio,pc,pci: features, cleanups, fixes

more memslots support in libvhost-user
support PCIe Gen5/Gen6 link speeds in pcie
more traces in vdpa
network simulation devices support in vdpa
SMBIOS type 9 descriptor implementation
Bump max_cpus to 4096 vcpus in q35
aw-bits and granule options in VIRTIO-IOMMU
Support report NUMA nodes for device memory using GI in acpi
Beginning of shutdown event support in pvpanic

fixes, cleanups all over the place.

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: (68 commits)
docs/specs/pvpanic: document shutdown event
hw/cxl: Fix missing reserved data in CXL Device DVSEC
hmat acpi: Fix out of bounds access due to missing use of indirection
hmat acpi: Do not add Memory Proximity Domain Attributes Structure targetting non existent memory.
qemu-options.hx: Document the virtio-iommu-pci aw-bits option
hw/arm/virt: Set virtio-iommu aw-bits default value to 48
hw/i386/q35: Set virtio-iommu aw-bits default value to 39
virtio-iommu: Add an option to define the input range width
virtio-iommu: Trace domain range limits as unsigned int
qemu-options.hx: Document the virtio-iommu-pci granule option
virtio-iommu: Change the default granule to the host page size
virtio-iommu: Add a granule property
hw/i386/acpi-build: Add support for SRAT Generic Initiator structures
hw/acpi: Implement the SRAT GI affinity structure
qom: new object to associate device to NUMA node
hw/i386/pc: Inline pc_cmos_init() into pc_cmos_init_late() and remove it
hw/i386/pc: Set "normal" boot device order in pc_basic_device_init()
hw/i386/pc: Avoid one use of the current_machine global
hw/i386/pc: Remove "rtc_state" link again
Revert "hw/i386/pc: Confine system flash handling to pc_sysfw"
...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

# Conflicts:
# hw/core/machine.c

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hw/virtio: Add support for VDPA network simulation devices

This patch adds support for VDPA network simulation devices.
The device is developed based on virtio-net and tap backend,
and supports hard

hw/virtio: Add support for VDPA network simulation devices

This patch adds support for VDPA network simulation devices.
The device is developed based on virtio-net and tap backend,
and supports hardware live migration function.

For more details, please refer to "docs/system/devices/vdpa-net.rst"

Signed-off-by: Hao Chen <chenh@yusur.tech>
Message-Id: <20240221073802.2888022-1-chenh@yusur.tech>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

show more ...