An example warning output is:
error: first doc comment paragraph is too long
--> virtio-devices/src/lib.rs:158:1
|
158 | / /// Convert an absolute address into an address space (GuestMemory)
159 | | /// to a host pointer and verify that the provided size define a valid
160 | | /// range within a single memory region.
161 | | /// Return None if it is out of bounds or if addr+size overlaps a single region.
| |_
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#too_long_first_doc_paragraph
= note: `-D clippy::too-long-first-doc-paragraph` implied by `-D warnings`
= help: to override `-D warnings` add `#[allow(clippy::too_long_first_doc_paragraph)]`
Signed-off-by: Bo Chen <chen.bo@intel.com>
In case of SEV-SNP guests on MSHV, any host component including VMM
trying to access any guest memory region, needs to call gain_access API
to acquire access to that particular memory region. This applies to all
the virtqueue buffers as well which the VMM is using to use to perform
DMA into the guest and in order to facilitate device emulation.
While creating various virtqueues we are already using access platform
hook to translate the addresses but currently we are missing the size
arguments which would be required by the SevSnpAccessPlatformProxy to
gain access to the memory of these queues.
Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
This would be used in case of SEV-SNP guest because we need to accquire
access to these virtqueue segments before accessing them.
Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
When the rate limit was reached it was possible for the notification to
the guest to be lost since the logic to handle the notification was
tightly coupled with processing the queue. The notification would
eventually be triggered when the rate limit pool was refilled but this
could add significant latency.
Address this by refactoring the code to separate processing queue and
signalling - the processing of the queue is suspended when the rate
limit is reached but the signalling will still be attempted if needed
(i.e. VIRTIO_F_EVENT_IDX is still considered.)
Signed-off-by: wuxinyue <wuxinyue.wxy@antgroup.com>
Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
With commit 1e967697c ("vmm: pass AccessPlatform implementation for
SEV-SNP guest"), we started performing one additional ioctl to gain
access to the guest memory before accessing those regions inside
virtio-device emulation code path. This additional ioctl is not part of
the current seccomp filter, which is causing the SevSnp guest to crash
in this scenario with seccomp violation.
Fixes: 1e967697c ("vmm: pass AccessPlatform implementation for SEV-SNP
guest")
Signed-off-by: Jinank Jain <jinankjain@microsoft.com>
This fixes a issue of running vm compiled in debug with Rust
1.80.0 or later, where this check was introduced.
Signed-off-by: Wenyu Huang <huangwenyuu@outlook.com>
This fixes the vsock::device::tests::test_virtio_device test with Rust
1.80.0 or later, where this check was introduced.
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Support event idx feature for virtio-blk device.
This feature could improve disk IO performance by suppressing
notifications from guest to host and interrupts from host to
guest, which has been already supported in virtio-net and
vhost-user devices.
To achieve this, virtqueue's event-idx-related API is
leveraged for avail_event field update and needs_notification
check.
Fixes: #6580
Signed-off-by: wuxinyue <wuxinyue.wxy@antgroup.com>
As per VirtIO spec 1.2 section 5.2.6, the `status` field is a byte, not
u32. cloud-hypervisor writes an `u32` to guest memory, which
accidentally zeros out the following 3 bytes, and may corrupt guest OS
internal state.
Signed-off-by: Changyuan Lyu <changyuanl@google.com>
TIOCGWINSZ modifies its argument, so it needs to mutably borrow it.
Unfortunately, ioctl()'s signature is not able to enforce this, and
the write happens in the kernel, so I don't think anything like miri,
valgrind, UBSan, etc. would have been able to catch this.
The UB passing an immutable reference caused resulted, for me, in
get_win_size() returning (0, 0) since LLVM commit
9a09c737a052 ("[BasicAA] Make isNotCapturedBeforeOrAt() check for
calls more precise (#69931)").
I've had a look through the other ioctl() calls in Cloud Hypervisor,
and I don't think any others have the same problem.
Signed-off-by: Alyssa Ross <hi@alyssa.is>
In 42e9632c53 a fix was made to address a
typo in the taplo configuration file. Fixing this typo indicated that
many Cargo.toml files were no longer adhering to the formatting rules.
Fix the formatting by running `taplo fmt`.
Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
Since vdpa device does not support pause/resume [1], it does not make
sense to restore on paused state.
[1] 099cdd2af8
Signed-off-by: Bo Chen <chen.bo@intel.com>
Misspellings were identified by:
https://github.com/marketplace/actions/check-spelling
* Initial corrections based on forbidden patterns from the action
* Additional corrections by Google Chrome auto-suggest
* Some manual corrections
* Adding markdown bullets to readme credits section
Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>
The compiler is now able to warn if an invalid attribute (e.g like a
feature) is not available.
See https://blog.rust-lang.org/2024/05/06/check-cfg.html for more
details.
Add build.rs files in the crates that use #cfg(fuzzing) to add fuzzing
to the list of valid cfg attributes.
Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
Code in this crate is conditional on this feature so it necessary to
expose as a new feature and use that feature as a dependency when the
feature is enabled on the vmm crate.
Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
Update the vhost-user-backend crate version used along with related
crates (vhost and virtio-queue.) This requires minor changes to the
types used for the memory in the backends with the use of the
BitmapMmapRegion type for the Bitmap implementation.
Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
The mem_size field is not needed in TestContext. Drop it.
Make sure guest_evvq is read once. Clippy cannot figured out that it was
used.
While at it, add an extra assert for the spurious rxvq event test, too.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
In accordance with reuse requirements:
- Place each license file in the LICENSES/ directory
- Add missing SPDX-License-Identifier to files.
- Add .reuse/dep5 to bulk-license files
Fixes: #5887
Signed-off-by: Ruslan Mstoi <ruslan.mstoi@intel.com>
The caller shouldn't pass in an &str that's too long. This is a
precaution if something goes wrong in the caller.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Properly detach a device from a domain if that device is already
attached to another domain on an attach request (following section
5.13.6.3.2 of the virtio-iommu spec). Resolves nested virtualization
reboot.
Signed-off-by: Andrew Carp <acarp@crusoeenergy.com>
Ensures that any endpoints already attached to the domain are properly
mapped to a new endpoint on said endpoint's attach request. This is done
by search for all previous mappings in the domain and then issuing map
requests for the newly attached endpoint.
Signed-off-by: Andrew Carp <acarp@crusoeenergy.com>
When restoring a VM, the VirtioPciCfgCapInfo struct is not properly
initialized. All fields are 0, including the offset where the
capabibility starts. Hence, when you read a PCI configuration register
in the range [0..length(VirtioPciCfgCap)] you get the value 0 instead of
the actual register contents.
Linux rescans the whole PCI bus when adding a new device. It reads the
values vendor_id and device_id for every device. Because these are
stored at offset 0 in pci configuration space, their value is 0 for
existing devices. As such, Linux considers that the devices have been
unplugged and it removes them from the system.
Fixes: #6265
Signed-off-by: Alexandru Matei <alexandru.matei@uipath.com>
According to the virtio iommu spec (section 5.13.6.6), all mappings
within the entire range from virt_start to virt_end in an unmap
request must be removed. This change adds this functionality,
iterating through all mappings that fall within an unmap request
for that domain and removing them.
Signed-off-by: Andrew Carp <acarp@crusoeenergy.com>
warning: `devices` (lib) generated 1 warning (run `cargo clippy --fix --lib -p devices` to apply 1 suggestion)
warning: assigning the result of `Clone::clone()` may be inefficient
--> virtio-devices/src/transport/pci_device.rs:1073:9
|
1073 | self.bar_regions = bars.clone();
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: use `clone_from()`: `self.bar_regions.clone_from(&bars)`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#assigning_clones
Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
With the nightly toolchain (2024-02-18) cargo check will flag up
redundant imports either because they are pulled in by the prelude on
earlier match.
Remove those redundant imports.
Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
For SevSnp guest IO events are handled by GHCB protocol.
While we get the notification we have to notify via eventfd.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
