Commit Graph

376 Commits

Author SHA1 Message Date
Michael Zhao
cd0b8ed8f8 virtio-devices: Allowing SYS_write syscall for virtio-net-ctl thread
"debug!" marco is used in virtio-devices/src/epoll_helper.rs. When"-vvv"
and "--log-file" option was specified, the missing "SYS_write" rule
caused a "bad system call" crash.

Signed-off-by: Michael Zhao <michael.zhao@arm.com>
2020-08-19 14:26:07 +02:00
Bo Chen
02d87833f0 virtio-devices: seccomp: Add seccomp filters for vhost_blk thread
This patch enables the seccomp filters for the vhost_blk worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-19 08:33:58 +02:00
Bo Chen
4e0ea15075 virtio-devices: seccomp: Add seccomp filter for vhost_net thread
This patch enables the seccomp filters for the vhost_net worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-19 08:33:58 +02:00
Bo Chen
896b9a1d4b virtio-devices: seccomp: Add seccomp filter for vhost_net_ctl thread
This patch enables the seccomp filters for the vhost_net_ctl worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-19 08:33:58 +02:00
Bo Chen
02d63149fe virtio-devices: seccomp: Add seccomp filters for vhost_fs thread
This patch enables the seccomp filters for the vhost_fs worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-19 08:33:58 +02:00
Bo Chen
c82ded8afa virtio-devices: seccomp: Add seccomp filters for balloon thread
This patch enables the seccomp filters for the balloon worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-19 08:33:58 +02:00
Bo Chen
c460178723 virtio-devices: seccomp: Add seccomp filters for mem thread
This patch enables the seccomp filters for the mem worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-19 08:33:58 +02:00
Bo Chen
de3b17d948 virtio-devices: Print out worker thread errors
As we never join the spawned virtio-devices worker threads, the error
returned from each worker thread is lost. For now, we simply print out
the error from each worker thread.

Fixes: #1551

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-18 07:57:11 +02:00
Bo Chen
aaa02a0d78 virtio-devices: seccomp: Add 'brk' syscall to all worker threads
To prevent potential failures, this patch adds 'brk' syscall to all
virtio-devices worker threads.

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-17 21:08:49 +02:00
Bo Chen
c90a71e329 virtio-devices: seccomp: Add 'brk' syscall to the rng thread
From the experiments of running integration tests on my local machine,
auditd occationally reported the 'brk' syscall is needed for the
'virtio-rng' worker thread.

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-17 21:08:49 +02:00
Bo Chen
c70ad27247 virtio-devices: Add seccomp filter list for net worker thread
This patch adds the seccomp filter list for the virtio_net thread, while
the list was already added for the virtio_net_ctl thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-17 21:08:49 +02:00
Bo Chen
3d6d9ca4de virtio-devices: Print out error message from the net worker thread
Partially fixes: #1551

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-17 21:08:49 +02:00
Bo Chen
1bf7817c40 virtio-devices: seccomp: Distinguish viritio-net-ctl from virtio-net
The current seccomp filter for virtio-net is actually for the worker
thread 'virtio_net_ctl' (not the actual worker thread
'virtio_net'). This patch introduces changes to distinguish those two
worker threads and seccomp filters.

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-17 21:08:49 +02:00
Bo Chen
4539236690 virtio-devices: seccomp: Add seccomp filters for iommu thread
This patch enables the seccomp filters for the iommu worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-17 21:08:49 +02:00
Bo Chen
dc6c62af09 virtio-devices: Print out error message from the iommu worker thread
Partially fixes: #1551

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-17 21:08:49 +02:00
Rob Bradford
6b40f2dbc5 virtio-devices: vsock: Fix clippy error
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-08-13 16:09:24 +02:00
Sebastien Boeuf
aa57762c4f virtio-devices: Acknowledge a device being paused
Using the Rust Barrier mechanism, this patch forces each virtio device
to acknowledge they've been correctly paused before going further.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-13 14:52:18 +02:00
Sebastien Boeuf
fca46fd00e virtio-devices: net: Add dup syscall to seccomp filters
The seccomp filters specific to the virtio-net threads must contain
dup() syscall now that we ported the epoll code to the EpollHelper.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-12 17:34:02 +02:00
Sebastien Boeuf
a502cb282e virtio-devices: net_ctrlq: Port to EpollHelper
Migrate virtio-net and vhost-user-net control queue to EpollHelper so
as to remove code duplication.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-12 17:34:02 +02:00
Sebastien Boeuf
821cf3add9 virtio-devices: vhost-user: Port to EpollHelper
Migrate all vhost-user devices to EpollHelper so as to remove code that
is duplicated between multiple virtio devices.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-12 14:39:54 +02:00
Sebastien Boeuf
8fbc4b4004 virtio-devices: vsock: Port to EpollHelper
Migrate to EpollHelper so as to remove code that is duplicated between
multiple virtio devices.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-12 10:07:57 +01:00
Sebastien Boeuf
01e7bd7276 virtio-devices: Make EpollHandler more generic
Instead of passing only the event type through the handle_event()
callback, we make the trait slightly more generic by providing the
epoll event to each virtio device implementation.

This is particularly useful for vsock as it will need the event set.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-12 10:07:57 +01:00
Sebastien Boeuf
e7ed037351 virtio-devices: balloon: Port to EpollHelper
Migrate to EpollHelper so as to remove code that is duplicated between
multiple virtio devices.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-11 19:58:10 +01:00
Sebastien Boeuf
e8f0bdb6f2 virtio-devices: console: Add dup syscall to seccomp filters
The seccomp filters specific to the virtio-console thread must contain
dup syscall now that we ported the epoll code to the EpollHelper.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-11 19:17:50 +02:00
Sebastien Boeuf
d9992b5b5f virtio-devices: console: Port to EpollHelper
Migrate to EpollHelper so as to remove code that is duplicated between
multiple virtio devices.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-11 19:17:50 +02:00
Sebastien Boeuf
05c6136790 io-uring: Move to the crates.io 0.4.0 version
Now that io-uring crate has been stabilized, let's move to the latest
release 0.4.0 from crates.io.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-10 08:40:51 +01:00
Rob Bradford
66efe3cf53 virtio-devices: mem: Port to EpollHelper
Migrate to EpollHelper so as to remove code that is duplicated between
multiple virtio devices.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-08-10 08:46:35 +02:00
dependabot-preview[bot]
7529a9ac05 build(deps): bump seccomp from v0.21.2 to v0.22.0
Bumps [seccomp](https://github.com/firecracker-microvm/firecracker) from v0.21.2 to v0.22.0.
- [Release notes](https://github.com/firecracker-microvm/firecracker/releases)
- [Changelog](cc5387637c/CHANGELOG.md)
- [Commits](a06d358b2e...cc5387637c)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-08-06 07:25:30 +00:00
Rob Bradford
b5d64be479 virtio-devices: iommu: Port to EpollHelper
Migrate to EpollHelper so as to remove code that is duplicated between
multiple virtio devices.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-08-05 13:15:23 +02:00
Rob Bradford
55c16fecbf virtio-devices: seccomp: Add missing dup() syscalls
The refactoring to use EpollHelper added a requirement on this system
call.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-08-05 11:32:31 +02:00
Rob Bradford
0e335a709d virtio-devices: Print out worker error messages
Currently any messages generated during the worker thread are not
shown anywhere as the thread is never join()ed on. Instead output the
error immediately.

For now only cover the subset where the work to port to EpollHandler
clashed with the seccomp filtering for virtio devices.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-08-05 11:32:31 +02:00
dependabot-preview[bot]
ec9de259ba build(deps): bump seccomp from v0.21.1 to v0.21.2
Bumps [seccomp](https://github.com/firecracker-microvm/firecracker) from v0.21.1 to v0.21.2.
- [Release notes](https://github.com/firecracker-microvm/firecracker/releases)
- [Changelog](a06d358b2e/CHANGELOG.md)
- [Commits](047a379eb0...a06d358b2e)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-08-05 07:34:44 +00:00
Bo Chen
dc71d2765a virtio-devices: seccomp: Add seccomp filters for pmem thread
This patch enables the seccomp filters for the pmem worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-05 08:13:31 +01:00
Bo Chen
d77977536d virtio-devices: seccomp: Add seccomp filters for net thread
This patch enables the seccomp filters for the net worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-05 08:13:31 +01:00
Bo Chen
276df6b71c virtio-devices: seccomp: Add seccomp filters for console thread
This patch enables the seccomp filters for the console worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-05 08:13:31 +01:00
Bo Chen
a426221167 virtio-devices: seccomp: Add seccomp filters for rng thread
This patch enables the seccomp filters for the rng worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-05 08:13:31 +01:00
Bo Chen
6a26789222 virtio-devices: seccomp: Fix typos in the block module
Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-05 08:13:31 +01:00
Rob Bradford
ce65093f8d virtio-devices: pmem: Port to EpollHelper
Migrate to EpollHelper so as to remove code that is duplicated between
multiple virtio devices.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-08-05 08:43:01 +02:00
Rob Bradford
e093f0e83e virtio-devices: rng: Port to EpollHelper
Migrate to EpollHelper so as to remove code that is duplicated between
multiple virtio devices.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-08-05 08:42:06 +02:00
Bo Chen
704edd544c virtio-devices: seccomp: Add seccomp_filter module
This patch added the seccomp_filter module to the virtio-devices crate
by taking reference code from the vmm crate. This patch also adds
allowed-list for the virtio-block worker thread.

Partially fixes: #925

Signed-off-by: Bo Chen <chen.bo@intel.com>
2020-08-04 11:40:49 +02:00
Sebastien Boeuf
8f0bf82648 io_uring: Add new feature gate
By adding a new io_uring feature gate, we let the user the possibility
to choose if he wants to enable the io_uring improvements or not.
Since the io_uring feature depends on the availability on recent host
kernels, it's better if we leave it off for now.

As soon as our CI will have support for a kernel 5.6 with all the
features needed from io_uring, we'll enable this feature gate
permanently.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-03 14:15:01 +01:00
Sebastien Boeuf
a85304196e virtio-devices: Improve error handling for virtio-blk io_uring
Instead of just logging error messages but continue the processing of
the queues, this patch returns errors right away. This allows for a
quicker detection of an error happening on the virtqueue.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-03 14:15:01 +01:00
Sebastien Boeuf
64283726e7 virtio-devices: Add an asynchronous virtio-blk device
This introduces a new version of virtio-blk device. The default
virtio-blk provides synchronous processing of the queues, while this
new version relies on io_uring from the host kernel to provide an
asynchronous processing of the queues.

This new asynchronous version provides a huge performance improvement
compared to the default synchronous version.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-08-03 14:15:01 +01:00
dependabot-preview[bot]
12c5b7668a build(deps): bump libc from 0.2.73 to 0.2.74
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.73 to 0.2.74.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.73...0.2.74)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-07-28 20:46:37 +00:00
Rob Bradford
56bfe2700d virtio-devices, net_util: Migrate virtio-net to EpollHelper
EpollHelper allows the removal of much duplicated loop handling code and
instead the device specific even handling is delegated via an
implementation of EpollHelperHandler.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-24 13:50:37 +02:00
Rob Bradford
d66fa942be virtio-devices: Implement AsRawFd for EpollHelper
This is required for implementing virtio-net as the epoll RawFd must be
assigned into the NetQueuePair.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-24 13:50:37 +02:00
Rob Bradford
1dcf1b11e4 virtio-devices: Reserve first 16 events for the EpollHelper
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-24 13:50:37 +02:00
Rob Bradford
5cad2334dd virtio-block: Port to EpollHelper
Port virtio-block device to the new EpollHelper. This required moving
the queue EventFd ownership to BlockEpollHandler.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-23 13:10:34 +01:00
Rob Bradford
7d9dc4013e virtio-devices: Introduce EpollHelper
This is a helper for implementing the worker thread for virtio devices
and in particular handles special behaviour for pause and kill events.

The device specific event handling (for the queues themselves) is
delegated to a method invoked on a new EpollHelperHandler trait. This
method is passed the event as well as the EpollHelper so that it can
operate on the handler in order to manage events itself (required for
virtio-net.)

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-23 13:10:34 +01:00
dependabot-preview[bot]
12b37ef13b build(deps): bump libc from 0.2.72 to 0.2.73
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.72 to 0.2.73.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.72...0.2.73)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-07-20 05:15:24 +00:00
Rob Bradford
dfd6f3471d virtio-devices: vhost_user: block: Only change mutable field in write_config()
The only driver writable field in the virtio-block specification is the
writeback one. Check that the offset being written to is for that field
and update it.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
Rob Bradford
eabcd618ba virtio-devices: block: Only change mutable field in write_config()
The only driver writable field in the virtio-block specification is the
writeback one. Check that the offset being written to is for that field
and update it.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
Rob Bradford
751a302050 virtio-devices: Port devices over to new read_config_from_slice() helper
Using this helper removes lots of duplicated code across the devices.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
Rob Bradford
d262540857 virtio-devices: Introduce helper for implementing read_config()
Add a helper function to share code between implementations that can use
a slice accessible data structure for configuration data.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
Rob Bradford
5d67338b29 virtio-devices: Remove warning generating read_config() implementation
The version in VirtioDevice can be used instead.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
Rob Bradford
676322c3cc virtio-devices: vsock: Remove write_config() implementation
This warning generating implementation can be handled by the version in
VirtioDevice.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
Rob Bradford
580739f776 virtio-devices: vhost_user: fs: Remove write_config() implementation
All the configuration fields for virtio-fs are read only for the driver.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
Rob Bradford
15d5cc62ff virtio-devices: vhost_user: net: Remove write_config implementation
The spec specifies that all fields are read-only from the driver.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
Rob Bradford
f1e940df8d virtio-devices: net: Remove write_config implementation
The spec specifies that all fields are read-only from the driver.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
Rob Bradford
e3dc620146 virtio-devices: Remove write_config implementations
Remove the write_config() implementations that only generate a warning
as that is now done at the VirtioDevice level.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
Rob Bradford
6ba1c4318e virtio-devices: Add default implementations for {read,write}_config
Not every virtio device has any config fields that can be read and most
have none that can be written to.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-16 13:17:22 +02:00
dependabot-preview[bot]
cc57467d10 build(deps): bump log from 0.4.8 to 0.4.11
Bumps [log](https://github.com/rust-lang/log) from 0.4.8 to 0.4.11.
- [Release notes](https://github.com/rust-lang/log/releases)
- [Changelog](https://github.com/rust-lang/log/blob/master/CHANGELOG.md)
- [Commits](https://github.com/rust-lang/log/compare/0.4.8...0.4.11)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-07-16 05:33:44 +00:00
Rob Bradford
9c867edc35 vhost_user_block, virtio-devices, block_util: Extract common block code
Extract the code that is used by vhost_user_block from the
virtio-devices crate to remove the dependencies on unrequired
functionality such as the virtio transports.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-15 10:17:11 +01:00
Michael Zhao
cce6237536 pci: Enable GSI routing (MSI type) for AArch64
In this commit we saved the BDF of a PCI device and set it to "devid"
in GSI routing entry, because this field is mandatory for GICv3-ITS.

Signed-off-by: Michael Zhao <michael.zhao@arm.com>
2020-07-14 14:34:54 +01:00
Hui Zhu
165568e98b virtio-mem: Update VirtioMemConfig according to Linux kernel
Types of block_size and padding is updated in
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=544fc7dbbf920a3e64d109c416ee229e8e1763c5.
Update VirtioMemConfig according to it.

Signed-off-by: Hui Zhu <teawater@antfin.com>
2020-07-13 12:19:24 +02:00
Sebastien Boeuf
3cc8ca4ea5 virtio-devices: Update virtio-iommu to follow 5.8-rc4 kernel
The virtio configuration structures have been slightly modified between
5.6-rc4 and 5.8-rc4, forcing the virtio-iommu device to be updated
accordingly.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-07-13 12:19:24 +02:00
Rob Bradford
4963e37dc8 qcow, virtio-devices: Break cyclic dependency
Move the definition of RawFile from virtio-devices crate into qcow
crate. All the code that consumes RawFile also already depends on the
qcow crate for image file type detection so this change breaks the
need for the qcow crate to depend on the very large virtio-devices
crate.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-10 17:47:31 +02:00
Rob Bradford
17766fcea4 net_util, vhost_user_net, virtio-devices: Move NetQueuePair
Move NetQueuePair and the related NetCounters into the net_util crate.
This means that the vhost_user_net crate now no longer depends on
virtio-devices and so does not depend on the pci, qcow or other similar
crates. This significantly simplifies the build chain for this backend.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-08 16:11:50 +01:00
Rob Bradford
1237784a8f net_util, virtio-devices: Move TAP register/unregister helpers
Move these helper functions into net_util so that they can be used from
code inside there.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-08 16:11:50 +01:00
Rob Bradford
48faf3abac net_util, virtio-devices, vhost_user_net: Relocate {Rx,Tx}Virtio
By moving the code for opening the two RX and TX queues into a shared
location we are starting to remove the requirement for the
vhost-user-net backend to depend on the virtio-devices crate which in of
itself depends on many other crates that are not necessary for the
backend to function.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-08 16:11:50 +01:00
Rob Bradford
3e807a19b7 net_util, virtio-devices, vhost_user_net: Relocate code for opening TAP
By moving the code for opening the TAP device into a shared location we
are starting to remove the requirement for the vhost-user-net backend to
depend on the virtio-devices crate which in of itself depends on many
other crates that are not necessary for the backend to function.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-08 16:11:50 +01:00
dependabot-preview[bot]
861337cc6f build(deps): bump libc from 0.2.71 to 0.2.72
Bumps [libc](https://github.com/rust-lang/libc) from 0.2.71 to 0.2.72.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.71...0.2.72)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>
2020-07-08 05:11:25 +00:00
Hui Zhu
800220acbb virtio-balloon: Store the balloon size to support reboot
This commit store balloon size to MemoryConfig.
After reboot, virtio-balloon can use this size to inflate back to
the size before reboot.

Signed-off-by: Hui Zhu <teawater@antfin.com>
2020-07-07 17:25:13 +01:00
Sebastien Boeuf
50da100afd virtio-devices: Fix virtio-balloon device
The implementation of the virtio-balloon was slightly wrong as it was
generating the GPA (Guest Physical Address) from the PFN (Page Frame
Number) which was a u32. That means the GPA was created as a u32, and
later a cast was done to extend it to a u64 type. Unfortunately, by
doing so, the GPA was wrong if the value was supposedly more than 32
bits.

That's why the PFN is casted into a u64 before the GPA is generated,
which creates the GPA on 64 bits directly.

Additionally, this patch simplifies the process_queue() function,
relying on multiple vm-memory helpers.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2020-07-07 17:25:13 +01:00
Hui Zhu
0d72aa782f virtio-devices: Add virtio-balloon device
Add virtio-balloon device.
It only supports the basic functions of the virtio-balloon.

Signed-off-by: Hui Zhu <teawater@antfin.com>
2020-07-07 17:25:13 +01:00
Rob Bradford
2a6eb31d5b vm-virtio, virtio-devices: Split device implementation from virt queues
Split the generic virtio code (queues and device type) from the
VirtioDevice trait, transport and device implementations.

This also simplifies the feature handling in vhost_user_backend as the
vm-virtio crate is no longer has any features.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2020-07-02 17:09:28 +01:00