Musl often uses mmap to allocate memory where Glibc would use brk.
This has caused seccomp violations for me on the API and signal
handling threads.
Signed-off-by: Alyssa Ross <hi@alyssa.is>
error: all if blocks contain the same code at the end
--> vmm/src/memory_manager.rs:884:9
|
884 | / Ok(mm)
885 | | }
| |_________^
Signed-off-by: Bo Chen <chen.bo@intel.com>
This concept ends up being broken with multiple types on input connected
e.g. console on TTY and serial on PTY. Already the code for checking for
injecting into the serial device checks that the serial is configured.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Introduce a common solution for spawning the virtio threads which will
make it easier to add the panic handling.
During this effort I discovered that there were no seccomp filters
registered for the vhost-user-net thread nor the vhost-user-block
thread. This change also incorporates basic seccomp filters for those as
part of the refactoring.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Current AArch64 power button is only for device tree using a PL061
GPIO controller device. Since AArch64 now supports ACPI, this
commit extend the power button on AArch64 to:
- Using GED for ACPI+UEFI boot.
- Using PL061 for device tree boot.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
These statements are useful for understanding the cause of reset or
shutdown of the VM and are not spammy so should be included at info!()
level.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Despite setting up a dedicated thread for signal handling, we weren't
making sure that the signals we were listening for there were actually
dispatched to the right thread. While the signal-hook provides an
iterator API, so we can know that we're only processing the signals
coming out of the iterator on our signal handling thread, the actual
signal handling code from signal-hook, which pushes the signals onto
the iterator, can run on any thread. This can lead to seccomp
violations when the signal-hook signal handler does something that
isn't allowed on that thread by our seccomp policy.
To reproduce, resize a terminal running cloud-hypervisor continuously
for a few minutes. Eventually, the kernel will deliver a SIGWINCH to
a thread with a restrictive seccomp policy, and a seccomp violation
will trigger.
As part of this change, it's also necessary to allow rt_sigreturn(2)
on the signal handling thread, so signal handlers are actually allowed
to run on it. The fact that this didn't seem to be needed before
makes me think that signal handlers were almost _never_ actually
running on the signal handling thread.
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Move the processing of the input from stdin, PTY or file from the VMM
thread to the existing virtio-console thread. The handling of the resize
of a virtio-console has not changed but the name of the struct used to
support that has been renamed to reflect its usage.
Fixes: #3060
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Downcasting of GicDevice trait might fail. Therefore we try to
downcast the trait first and only if the downcasting succeeded we
can then use the object to call methods. Otherwise, do nothing and
log the failure.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit implements the GIC (including both GICv3 and GICv3ITS)
Pausable trait. The pause of device manager will trigger a "pause"
of GIC, where we flush GIC pending tables and ITS tables to the
guest RAM.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This prevents the boot of the guest kernel from being blocked by
blocking I/O on the serial output since the data will be buffered into
the SerialBuffer.
Fixes: #3004
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Introduce a dynamic buffer for storing output from the serial port. The
SerialBuffer implements std::io::Write and can be used in place of the
direct output for the serial device.
The internals of the buffer is a vector that grows dynamically based on
demand up to a fixed size at which point old data will be overwritten.
Currently the buffer is only flushed upon writes.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The rust-vmm crates we're pulling from git have renamed their main
branches. We need to update the branch names we're giving to Cargo,
or people who don't have these dependencies cached will get errors
like this when trying to build:
error: failed to get `vm-fdt` as a dependency of package `arch v0.1.0 (/home/src/cloud-hypervisor/arch)`
Caused by:
failed to load source for dependency `vm-fdt`
Caused by:
Unable to update https://github.com/rust-vmm/vm-fdt?branch=master#031572a6
Caused by:
object not found - no match for id (031572a6edc2f566a7278f1e17088fc5308d27ab); class=Odb (9); code=NotFound (-3)
Signed-off-by: Alyssa Ross <hi@alyssa.is>
Remove the indirection of a dispatch table and simply use the enum as
the event data for the events.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Use two separate events for the console and serial PTY and then drive
the handling of the inputs on the PTY separately. This results in the
correct behaviour when both console and serial are attached to the PTY
as they are triggered separately on the epoll so events are not lost.
Fixes: #3012
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Check the config to find out which device is attached to the tty and
then send the input from the user into that device (serial or
virtio-console.)
Fixes: #3005
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
vhdx_sync.rs in block_util implements traits to represent the vhdx
crate as a supported block device in the cloud hypervisor. The vhdx
is added to the block device list in device_manager.rs at the vmm
crate so that it can automatically detect a vhdx disk and invoke the
corresponding crate.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Fazla Mehrab <akm.fazla.mehrab@intel.com>
We are relying on applying empty 'seccomp' filters to support the
'--seccomp false' option, which will be treated as an error with the
updated 'seccompiler' crate. This patch fixes this issue by explicitly
checking whether the 'seccomp' filter is empty before applying the
filter.
Signed-off-by: Bo Chen <chen.bo@intel.com>
It is forbidden that the same memory zone belongs to more than one
NUMA node. This commit adds related validation to the `--numa`
parameter to prevent the user from specifying such configuration.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
The optional device tree node distance-map describes the relative
distance (memory latency) between all NUMA nodes.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This is to make sure the NUMA node data structures can be accessed
both from the `vmm` crate and `arch` crate.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
The AArch64 platform provides a NUMA binding for the device tree,
which means on AArch64 platform, the NUMA setup can be extended to
more than the ACPI feature.
Based on above, this commit extends the NUMA setup and data
structures to following scenarios:
- All AArch64 platform
- x86_64 platform with ACPI feature enabled
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Signed-off-by: Michael Zhao <Michael.Zhao@arm.com>
Instead of panicking with an expect() function, the QcowDiskSync::new
function now propagates the error properly. This ensures the VMM will
not panic, which might be the source of weird errors if only one thread
exits while the VMM continues to run.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We cannot let vhost-user devices connect to the backend when the Block,
Fs or Net object is being created during a restore/migration. The reason
is we can't have two VMs (source and destination) connected to the same
backend at the same time. That's why we must delay the connection with
the vhost-user backend until the restoration is performed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The code wasn't doing what it was expected to. The '?' was simply
returning the error to the top level function, meaning the Err() case in
the match was never hit. Moving the whole logic to a dedicated function
allows to identify when something got wrong without propagating to the
calling function, so that we can still stop the dirty logging and
unpause the VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In case the migration succeeds, the destination VM will be correctly
running, with potential vhost-user backends attached to it. We can't let
the source VM trying to reconnect to the same backends, which is why
it's safer to shutdown the source VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for creating vhost-user devices in a different way when
being restored compared to a fresh start, this commit introduces a new
boolean created by the Vm depending on the use case, and passed down to
the DeviceManager. In the future, the DeviceManager will use this flag
to assess how vhost-user devices should be created.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Correct operation of user devices (vfio-user) requires shared memory so
flag this to prevent it from failing in strange ways.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Create the vfio-user / user devices from the config. Currently hotplug
of the devices is not supported nor can they be placed behind the
(virt-)iommu.
Removal of the coldplugged device is however supported.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows the user to specify devices that are running in a different
userspace process and communicated with vfio-user.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Allow vsocks to connect to Unix sockets on the host running
cloud-hypervisor with enabled seccomp.
Reported-by: Philippe Schaaf <philippe.schaaf@secunet.com>
Tested-by: Franz Girlich <franz.girlich@tu-ilmenau.de>
Signed-off-by: Markus Theil <markus.theil@tu-ilmenau.de>
This doesn't really affect the build as we ship a Cargo.lock with fixed
versions in. However for clarity it makes sense to use fixed versions
throughout and let dependabot update them.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The optional Processor Properties Topology Table (PPTT) table is
used to describe the topological structure of processors controlled
by the OSPM, and their shared resources, such as caches. The table
can also describe additional information such as which nodes in the
processor topology constitute a physical package.
The ACPI PPTT table supports topology descriptions for ACPI guests.
Therefore, this commit adds the PPTT table for AArch64 to enable
CPU topology feature for ACPI.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
In an Arm system, the hierarchy of CPUs is defined through three
entities that are used to describe the layout of physical CPUs in
the system:
- cluster
- core
- thread
All these three entities have their own FDT node field. Therefore,
This commit adds an AArch64-specific helper to pass the config from
the Cloud Hypervisor command line to the `configure_system`, where
eventually the `create_fdt` is called.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Make sure the DeviceManager is triggered for all migration operations.
The dirty pages are merged from MemoryManager and DeviceManager before
to be sent up to the Vmm in lib.rs.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that Migratable provides the methods for starting, stopping and
retrieving the dirty pages, we move the existing code to these new
functions.
No functional change intended.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This patch connects the dots between the vm.rs code and each Migratable
device, in order to make sure Migratable methods are correctly invoked
when migration happens.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for supporting the merge of multiple dirty pages coming
from multiple devices, this patch factorizes the creation of a
MemoryRangeTable from a bitmap, as well as providing a simple method for
merging the dirty pages regions under a single MemoryRangeTable.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This patch adds all the seccomp rules missing for MSHV.
With this patch MSFT internal CI runs with seccomp enabled.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
This patch adds a fallback path for sending live migration, where it
ensures the following behavior of source VM post live-migration:
1. The source VM will be paused only when the migration is completed
successfully, or otherwise it will keep running;
2. The source VM will always stop dirty pages logging.
Fixes: #2895
Signed-off-by: Bo Chen <chen.bo@intel.com>
This rule is needed to boot windows guest.
This bug was introduced while we tried to boot
windows guest on MSHV.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
This patch modify the existing live migration code
to support MSHV. Adds couple of new functions to enable
and disable dirty page tracking. Add missing IOCTL
to the seccomp rules for live migration.
Adds necessary flags for MSHV.
This changes don't affect KVM functionality at all.
In order to get better performance it is good to
enable dirty page tracking when we start live migration
and disable it when the migration is done.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
Right now, get_dirty_log API has two parameters,
slot and memory_size.
MSHV needs gpa to retrieve the page states. GPA is
needed as MSHV returns the state base on PFN.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
It's totally acceptable to snapshot and restore a virtio-fs device that
has no cache region, since this is a valid mode of functioning for
virtio-fs itself.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
With the new beta version, clippy complains about redundant allocation
when using Arc<Box<dyn T>>, and suggests replacing it simply with
Arc<dyn T>.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
As we are now using an global control to start/stop dirty pages log from
the `hypervisor` crate, we need to explicitly tell the hypervisor (KVM)
whether a region needs dirty page tracking when it is created.
This reverts commit f063346de3.
Signed-off-by: Bo Chen <chen.bo@intel.com>
Following KVM interfaces, the `hypervisor` crate now provides interfaces
to start/stop the dirty pages logging on a per region basis, and asks
its users (e.g. the `vmm` crate) to iterate over the regions that needs
dirty pages log. MSHV only has a global control to start/stop dirty
pages log on all regions at once.
This patch refactors related APIs from the `hypervisor` crate to provide
a global control to start/stop dirty pages log (following MSHV's
behaviors), and keeps tracking the regions need dirty pages log for
KVM. It avoids leaking hypervisor-specific behaviors out of the
`hypervisor` crate.
Signed-off-by: Bo Chen <chen.bo@intel.com>
This patch adds a common function "Vmm::vm_check_cpuid_compatibility()"
to be shared by both live-migration and snapshot/restore.
Signed-off-by: Bo Chen <chen.bo@intel.com>
We now send not only the 'VmConfig' at the 'Command::Config' step of
live migration, but also send the 'common CPUID'. In this way, we can
check the compatibility of CPUID features between the source and
destination VMs, and abort live migration early if needed.
Signed-off-by: Bo Chen <chen.bo@intel.com>
With the support of dynamically turning on/off dirty-pages-log during
live-migration (only for guest RAM regions), we now can create guest
memory regions without dirty-pages-log by default both for guest RAM
regions and other regions backed by file/device.
Signed-off-by: Bo Chen <chen.bo@intel.com>
This patch extends slightly the current live-migration code path with
the ability to dynamically start and stop logging dirty-pages, which
relies on two new methods added to the `hypervisor::vm::Vm` Trait. This
patch also contains a complete implementation of the two new methods
based on `kvm` and placeholders for `mshv` in the `hypervisor` crate.
Fixes: #2858
Signed-off-by: Bo Chen <chen.bo@intel.com>
Whenever a file descriptor is sent through the control message, it
requires fcntl() syscall to handle it, meaning we must allow it through
the list of syscalls authorized for the HTTP thread.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When running TDX guest, the Guest Physical Address space is limited by
a shared bit that is located on bit 47 for 4 level paging, and on bit 51
for 5 level paging (when GPAW bit is 1). In order to keep things simple,
and since a 47 bits address space is 128TiB large, we ensure to limit
the physical addressable space to 47 bits when runnning TDX.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When running a TDX guest, we need the virtio drivers to use the DMA API
to share specific memory pages with the VMM on the host. The point is to
let the VMM get access to the pages related to the buffers pointed by
the virtqueues.
The way to force the virtio drivers to use the DMA API is by exposing
the virtio devices with the feature VIRTIO_F_IOMMU_PLATFORM. This is a
feature indicating the device will require some address translation, as
it will not deal directly with physical addresses.
Cloud Hypervisor takes care of this requirement by adding a generic
parameter called "force_iommu". This parameter value is decided based on
the "tdx" feature gate, and then passed to the DeviceManager. It's up to
the DeviceManager to use this parameter on every virtio device creation,
which will imply setting the VIRTIO_F_IOMMU_PLATFORM feature.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This refactoring ensures all CPUID related operations are centralized in
`arch::x86_64` module, and exposes only two related public functions to
the vmm crate, e.g. `generate_common_cpuid` and `configure_vcpu`.
Signed-off-by: Bo Chen <chen.bo@intel.com>
In order to let a separate process open a TAP device and pass the file
descriptor through the control message mechanism, this patch adds the
support for sending a file descriptor over to the Cloud Hypervisor
process along with the add-net HTTP API command.
The implementation uses the NetConfig structure mutably to update the
list of fds with the one passed through control message. The list should
always be empty prior to this, as it makes no sense to provide a list of
fds once the Cloud Hypervisor process has already been started.
It is important to note that reboot is supported since the file
descriptor is duplicated upon receival, letting the VM only use the
duplicated one. The original file descriptor is kept open in order to
support a potential reboot.
Fixes#2525
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
There are some seccomp rules needed for MSHV
in virtio-devices but not for KVM. We only want to
add those rules based on MSHV feature guard.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
The micro-http crate now uses recvmsg() syscall in order to receive file
descriptors through control messages. This means the syscall must be
part of the authorized list in the seccomp filters.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The vfio-ioctls crate now contains a KVM feature gate. Make use of it in
Cloud Hypervisor.
That crate has two users. For the vmm crate is it straight-forward. For
the vm-device crate, we introduce a KVM feature gate as well so that the
vmm crate can pass on the configuration.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
This new option allows the user to define a list of SGX EPC sections
attached to a specific NUMA node.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to uniquely identify each SGX EPC section, we introduce a
mandatory option `id` to the `--sgx-epc` parameter.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The guest can see that SGX supports provisioning as it is exposed
through the CPUID. This patch enables the proper backing of this
feature by having the host open the provisioning device and enable
this capability through the hypervisor.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This patch fixes a few things to support TDVF correctly.
The HOB memory resources must contain EFI_RESOURCE_ATTRIBUTE_ENCRYPTED
attribute.
Any section with a base address within the already allocated guest RAM
must not be allocated.
The list of TD_HOB memory resources should contain both TempMem and
TdHob sections as well.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Previously the same function was used to both create and remove regions.
This worked on KVM because it uses size 0 to indicate removal.
MSHV has two calls -- one for creation and one for removal. It also
requires having the size field available because it is not slot based.
Split set_user_memory_region to {create/remove}_user_memory_region. For
KVM they still use set_user_memory_region underneath, but for MSHV they
map to different functions.
This fixes user memory region removal on MSHV.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
The to-be-introduced MSHV rules don't need to contain KVM rules and vice
versa.
Put KVM constants into to a module. This avoids the warnings about
dead code in the future.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
This commit introduces the `ProcessorGiccAffinity` struct for the
AArch64 platform. This struct will be created and included into
the SRAT table to enable AArch64 NUMA setup.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
It ensures all handlers for `ApiRequest` in `control_loop` are
consistent and minimum and should read better.
No functional changes.
Signed-off-by: Bo Chen <chen.bo@intel.com>
It simplifies a bit the `Vmm::control_loop` and reads better to be
consistent with other `ApiRequest` handlers. Also, it removes the
repetitive `ApiError::VmAlreadyCreated` and makes `ApiError::VmCreate`
useful.
No functional changes.
Signed-off-by: Bo Chen <chen.bo@intel.com>
We have been building Cloud Hypervisor with command like:
`cargo build --no-default-features --features ...`.
After implementing ACPI, we donot have to use specify all features
explicitly. Default build command `cargo build` can work.
This commit fixed some build warnings with default build option and
changed github workflow correspondingly.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
error: avoid using `collect()` when not needed
--> vmm/src/vm.rs:630:86
|
630 | let node_id_list: Vec<u32> = configs.iter().map(|cfg| cfg.guest_numa_id).collect();
| ^^^^^^^
...
664 | if !node_id_list.contains(&dest) {
| ---------------------------- the iterator could be used here instead
|
= note: `-D clippy::needless-collect` implied by `-D warnings`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_collect
Signed-off-by: Bo Chen <chen.bo@intel.com>
Issue from beta verion of clippy:
Error: --> vm-virtio/src/queue.rs:700:59
|
700 | if let Some(used_event) = self.get_used_event(&mem) {
| ^^^^ help: change this to: `mem`
|
= note: `-D clippy::needless-borrow` implied by `-D warnings`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#needless_borrow
Signed-off-by: Bo Chen <chen.bo@intel.com>
Issue from beta verion of clippy:
error: field is never read: `type`
--> vmm/src/cpu.rs:235:5
|
235 | pub r#type: u8,
| ^^^^^^^^^^^^^^
|
= note: `-D dead-code` implied by `-D warnings`
Signed-off-by: Bo Chen <chen.bo@intel.com>
The Linux kernel expects that any PCI devices that advertise I/O bars
have use an address that is within the range advertised by the bus
itself. Unfortunately we were not advertising any I/O ports associated
with the PCI bus in the ACPI tables.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to allow a hotplugged vCPU to be assigned to the correct NUMA
node in the guest, the DSDT table must expose the _PXM method for each
vCPU. This method defines the proximity domain to which each vCPU should
be attached to.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The _PXM method always return 0, which is wrong since the SRAT might
tell differently. The point of the _PXM method is to be evaluated by the
guest OS when some new memory slot is being plugged, but this will never
happen for Cloud Hypervisor since using NUMA nodes along with memory
hotplug only works for virtio-mem.
Memory hotplug through ACPI will only happen when there's only one NUMA
node exposed to the guest, which means the _PXM method won't be needed
at all.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Make sure the unique PCI bus is tied to the default NUMA node 0, and
update the documentation to let the users know about this special case.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Sometimes we need balloon deflate automatically to give memory
back to guest, especially for some low priority guest processes
under memory pressure. Enable deflate_on_oom to support this.
Usage: --balloon "size=0,deflate_on_oom=on" \
Signed-off-by: Fei Li <lifei.shirley@bytedance.com>
Since using the VIRTIO configuration to expose the virtual IOMMU
topology has been deprecated, the virtio-iommu implementation must be
updated.
In order to follow the latest patchset that is about to be merged in the
upstream Linux kernel, it must rely on ACPI, and in particular the newly
introduced VIOT table to expose the information about the list of PCI
devices attached to the virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Implemented an architecture specific function for loading UEFI binary.
Changed the logic of loading kernel image:
1. First try to load the image as kernel in PE format;
2. If failed, try again to load it as formatless UEFI binary.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
_DSM (Device Specific Method) is a control method that enables devices
to provide device specific control functions. Linux kernel will evaluate
this device then initialize preserve_config in acpi pci initialization.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
Live migration currently handles guest memory writes from the guest
through the KVM dirty page tracking and sends those dirty pages to the
destination. This patch augments the live migration support with dirty
page tracking of writes from the VMM to the guest memory(e.g. virtio
devices).
Fixes: #2458
Signed-off-by: Bo Chen <chen.bo@intel.com>
Function "GuestMemory::with_regions(_mut)" were mainly temporary methods
to access the regions in `GuestMemory` as the lack of iterator-based
access, and hence they are deprecated in the upstream vm-memory crate [1].
[1] https://github.com/rust-vmm/vm-memory/issues/133
Signed-off-by: Bo Chen <chen.bo@intel.com>
As the first step to complete live-migration with tracking dirty-pages
written by the VMM, this commit patches the dependent vm-memory crate to
the upstream version with the dirty-page-tracking capability. Most
changes are due to the updated `GuestMemoryMmap`, `GuestRegionMmap`, and
`MmapRegion` structs which are taking an additional generic type
parameter to specify what 'bitmap backend' is used.
The above changes should be transparent to the rest of the code base,
e.g. all unit/integration tests should pass without additional changes.
Signed-off-by: Bo Chen <chen.bo@intel.com>
After adding "get_interrupt_controller()" function in DeviceManager,
"enable_interrupt_controller()" became redundant, because the latter
one is the a simple wrapper on the interrupt controller.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
The function used to calculate "gicr-typer" value has nothing with
DeviceManager. Now it is moved to AArch64 specific files.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
We thought we could move the control queue to the backend as it was
making some good sense. Unfortunately, doing so was a wrong design
decision as it broke the compatibility with OVS-DPDK backend.
This is why this commit moves the control queue back to the VMM side,
meaning an additional thread is being run for handling the communication
with the guest.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
On FDT, VMM can allocate IRQ from 0 for devices.
But on ACPI, the lowest range below 32 has to be avoided.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
This commit enables the PSCI (Power State Coordination Interface)
for the AArch64 platform, which allows the VMM to manage the power
status of the guest. Also, multiple vCPUs can be brought up using
PSCI.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit implements the IO Remapping Table (IORT) for AArch64.
The IORT is one of the required ACPI table for AArch64, since
it describes the GICv3ITS node.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit implements an AArch64-required ACPI table: Serial
Port Console Redirection Table (SPCR). The table provides
information about the configuration and use of the serial port
or non-legacy UART interface.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit implements an AArch64-specific ACPI table: Generic
Timer Description Table (GTDT). The GTDT provides OSPM with
information about a system’s Generic Timers configuration.
The Generic Timer (GT) is a standard timer interface implemented
on ARM processor-based systems.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Added the final PCI bus number in MCFG table. This field is mandatory on
AArch64. On X86 it is optional.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Simplified definition block of CPU's on AArch64. It is not complete yet.
Guest boots. But more is to do in future:
- Fix the error in ACPI definition blocks (seen in boot messages)
- Implement CPU hot-plug controller
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
In migration, vm object is created by new_from_migration with
NULL kvm clock. so vm.set_clock will not be called during vm resume.
If the guest using kvm-clock, the ticks will be stopped after migration.
As clock was already saved to snapshot, add a method to restore it before
vm resume in migration. after that, guest's kvm-clock works well.
Signed-off-by: Ren Lei <ren.lei4@zte.com.cn>
Connecting a restored KVM clock vm will take long time, as clock
is NOT restored immediately after vm resume from snapshot.
this is because 9ce6c3b incorrectly remove vm_snapshot.clock, and
always pass None to new_from_memory_manager, which will result to
kvm_set_clock() never be called during restore from snapshot.
Fixes: 9ce6c3b
Signed-off-by: Ren Lei <ren.lei4@zte.com.cn>
Now that the control queue is correctly handled by the backend, there's
no need to handle it as well from the VMM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Before this change, the FDT was loaded at the end of RAM. The address of
FDT was not fixed.
While UEFI (edk2 now) requires fixed address to find FDT and RSDP.
Now the FDT is moved to the beginning of RAM, which is a fixed address.
RSDP is wrote to 2 MiB after FDT, also a fixed address.
Kernel comes 2 MiB after RSDP.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
These messages are predominantly during the boot process but will also
occur during events such as hotplug.
These cover all the significant steps of the boot and can be helpful for
diagnosing performance and functionality issues during the boot.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Separate the population of the memory and the HOB from the TDX
initialisation of the memory so that the latter can happen after the CPU
is initialised.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Now all crates use edition = "2018" then the majority of the "extern
crate" statements can be removed. Only those for importing macros need
to remain.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Adding the support for an OVS vhost-user backend to connect as the
vhost-user client. This means we introduce with this patch a new
option to our `--net` parameter. This option is called 'server' in order
to ask the VMM to run as the server for the vhost-user socket.
Fixes#1745
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Create a temporary copy of the config, add the new device and validate
that. This needs to be done separately to adding it to the config to
avoid race conditions that might be result in config changes being
overwritten.
Fixes: #2564
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
To handle that devices are stored in an Option<Vec<T>> and reduce
duplicated code use generic function to add the devices to the the
struct.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The latest kvm-sgx code has renamed sgx_virt_epc device node
to sgx_vepc. Update cloud-hypervisor code and documentation to
follow this.
Signed-off-by: Mikko Ylinen <mikko.ylinen@intel.com>
Because the http thread no longer needs to create the api socket,
remove the socket, bind and listen syscalls from the seccomp filter.
Signed-off-by: William Douglas <william.douglas@intel.com>
Instead of using the http server's method to have it create the
fd (causing the http thread to need to support the socket, bind and
listen syscalls). Create the socket fd in the vmm thread and use the
http server's new method supporting passing in this fd for the api
socket.
Signed-off-by: William Douglas <william.douglas@intel.com>
To avoid race issues where the api-socket may not be created by the
time a cloud-hypervisor caller is ready to look for it, enable the
caller to pass the api-socket fd directly.
Avoid breaking current callers by allowing the --api-socket path to be
passed as it is now in addition to through the path argument.
Signed-off-by: William Douglas <william.r.douglas@gmail.com>
In order to support using Versionize for state structures it is necessary
to use simpler, primitive, data types in the state definitions used for
snapshot restore.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Windows guests read this field upon PCI device ejection. Let's make sure
we don't return an error as this is valid. We simply return an empty u32
since the ejection is done right away upon write access, which means
there's no pending ejection that might be reported to the guest.
Here is the error that was shown during PCI device removal:
ERROR:vmm/src/device_manager.rs:3960 -- Accessing unknown location at
base 0x7ffffee000, offset 0x8
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of tracking on a block level of 64 pages, we are now collecting
dirty pages one by one. It improves the efficiency of dirty memory
tracking while live migration.
Signed-off-by: Bo Chen <chen.bo@intel.com>
By disabling this KVM feature, we prevent the guest from using APF
(Asynchronous Page Fault) mechanism. The kernel has recently switched to
using interrupts to notify about a page being ready, but for some
reasons, this is causing unexpected behavior with Cloud Hypervisor, as
it will make the vcpu thread spin at 100%.
While investigating the issue, it's better to disable the KVM feature to
prevent 100% CPU usage in some cases.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The original code had a generic type E. It was later replaced by a
concrete type. The code should have been simplified when the replacement
happened.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
The MCRS method returns a 64-bit memory range descriptor. The
calculation is supposed to be done as follows:
max = min + len - 1
However, every operand is represented not as a QWORD but as combination
of two DWORDs for high and low part. Till now, the calculation was done
this way, please see also inline comments:
max.lo = min.lo + len.lo //this may overflow, need to carry over to high
max.hi = min.hi + len.hi
max.hi = max.hi - 1 // subtraction needs to happen on the low part
This calculation has been corrected the following way:
max.lo = min.lo + len.lo
max.hi = min.hi + len.hi + (max.lo < min.lo) // check for overflow
max.lo = max.lo - 1 // subtract from low part
The relevant part from the generated ASL for the MCRS method:
```
Method (MCRS, 1, Serialized)
{
Acquire (MLCK, 0xFFFF)
\_SB.MHPC.MSEL = Arg0
Name (MR64, ResourceTemplate ()
{
QWordMemory (ResourceProducer, PosDecode, MinFixed, MaxFixed, Cacheable, ReadWrite,
0x0000000000000000, // Granularity
0x0000000000000000, // Range Minimum
0xFFFFFFFFFFFFFFFE, // Range Maximum
0x0000000000000000, // Translation Offset
0xFFFFFFFFFFFFFFFF, // Length
,, _Y00, AddressRangeMemory, TypeStatic)
})
CreateQWordField (MR64, \_SB.MHPC.MCRS._Y00._MIN, MINL) // _MIN: Minimum Base Address
CreateDWordField (MR64, 0x12, MINH)
CreateQWordField (MR64, \_SB.MHPC.MCRS._Y00._MAX, MAXL) // _MAX: Maximum Base Address
CreateDWordField (MR64, 0x1A, MAXH)
CreateQWordField (MR64, \_SB.MHPC.MCRS._Y00._LEN, LENL) // _LEN: Length
CreateDWordField (MR64, 0x2A, LENH)
MINL = \_SB.MHPC.MHBL
MINH = \_SB.MHPC.MHBH
LENL = \_SB.MHPC.MHLL
LENH = \_SB.MHPC.MHLH
MAXL = (MINL + LENL) /* \_SB_.MHPC.MCRS.LENL */
MAXH = (MINH + LENH) /* \_SB_.MHPC.MCRS.LENH */
If ((MAXL < MINL))
{
MAXH += One /* \_SB_.MHPC.MCRS.MAXH */
}
MAXL -= One
Release (MLCK)
Return (MR64) /* \_SB_.MHPC.MCRS.MR64 */
}
```
Fixes#1800.
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
Fixes the current codebase so that every cargo clippy can be run with
the beta toolchain without any error.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
There are two parts:
- Unconditionally zero the output area. The length of the incoming
vector has been seen from 1 to 4 bytes, even though just the first
byte might need to be handled. But also, this ensures any possibly
unhandled offset will return zeroed result to the caller. The former
implementation used an I/O port which seems to behave differently from
MMIO and wouldn't require explicit output zeroing.
- An access with zero offset still takes place and needs to be handled.
Fixes#2437.
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
The following is from the Hyper-V specification v6.0b.
Cpuid leaf 0x40000003 EDX:
Bit 3: Support for physical CPU dynamic partitioning events is
available.
When Windows determines to be running under a hypervisor, it will
require this cpuid bit to be set to support dynamic CPU operations.
Cpuid leaf 0x40000004 EAX:
Bit 5: Recommend using relaxed timing for this partition. If
used, the VM should disable any watchdog timeouts that
rely on the timely delivery of external interrupts.
This bit has been figured out as required after seeing guest BSOD
when CPU hotplug bit is enabled. Race conditions seem to arise after a
hotplug operation, when a system watchdog has expired.
Closes#1799.
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
error: name `GPIOInterruptDisabled` contains a capitalized acronym
Error: --> devices/src/legacy/gpio_pl061.rs:46:5
|
46 | GPIOInterruptDisabled,
| ^^^^^^^^^^^^^^^^^^^^^ help: consider making the acronym lowercase, except the initial letter: `GpioInterruptDisabled`
|
= note: `-D clippy::upper-case-acronyms` implied by `-D warnings`
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
error: name `FinalizeTDX` contains a capitalized acronym
--> vmm/src/vm.rs:274:5
|
274 | FinalizeTDX(hypervisor::HypervisorVmError),
| ^^^^^^^^^^^ help: consider making the acronym lowercase, except the initial letter: `FinalizeTdx`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
warning: name `AcpiPMTimerDevice` contains a capitalized acronym
--> devices/src/acpi.rs:175:12
|
175 | pub struct AcpiPMTimerDevice {
| ^^^^^^^^^^^^^^^^^ help: consider making the acronym lowercase, except the initial letter: `AcpiPmTimerDevice`
|
= note: `#[warn(clippy::upper_case_acronyms)]` on by default
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
warning: name `IORegion` contains a capitalized acronym
--> pci/src/configuration.rs:320:5
|
320 | IORegion = 0x01,
| ^^^^^^^^ help: consider making the acronym lowercase, except the initial letter (notice the capitalization): `IoRegion`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
warning: name `LocalAPIC` contains a capitalized acronym
--> vmm/src/cpu.rs:197:8
|
197 | struct LocalAPIC {
| ^^^^^^^^^ help: consider making the acronym lowercase, except the initial letter: `LocalApic`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
error: name `TYPE_UNKNOWN` contains a capitalized acronym
--> vm-virtio/src/lib.rs:48:5
|
48 | TYPE_UNKNOWN = 0xFF,
| ^^^^^^^^^^^^ help: consider making the acronym lowercase, except the initial letter: `Type_Unknown`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
error: name `SDT` contains a capitalized acronym
--> acpi_tables/src/sdt.rs:27:12
|
27 | pub struct SDT {
| ^^^ help: consider making the acronym lowercase, except the initial letter: `Sdt`
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#upper_case_acronyms
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Drop the generic type E and use IrqRoutngEntry directly. This allows
dropping a bunch of trait bounds from code.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Their make_entry functions look the same now. Extract the logic to a
common function.
No functional change.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
There's no need to have the code creating the passthrough_device being
duplicated since we can factorize it in a function used in both cases
(both cold plugged and hot plugged devices VFIO devices).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Extend and use the existing DeviceTree to retrieve useful information
related to PCI devices. This removes the duplication with pci_devices
field which was internal to the DeviceManager.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Make the code a bit clearer by changing the naming of the structure
holding the list of IRQs reserved for PCI devices. It is also modified
into an array of 32 entries since we know this is the amount of PCI
slots that is supported.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We define a new enum in order to classify PCI device under virtio or
VFIO. This is a cleaner approach than using the Any trait, and
downcasting it to find the object back.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Introduces a tuple holding both information needed by pci_id_list and
pci_devices.
Changes pci_devices to be a BTreeMap of this new tuple.
Now that pci_devices holds the information needed from pci_id_list,
pci_id_list is no longer needed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for further factorization, the pci_id_list is now a
hashmap of PCI b/d/f leading to each device name.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of relying on a PCI specific device list, we use the DeviceTree
as a reference to determine if a device name is already in use or not.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Only if we have a valid API server path then create the API server. For
now this has no functional change there is a default API server path in
the clap handling but rather prepares to do so optionally.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit switches the default serial device from 16550 to the
Arm dedicated UART controller PL011. The `ttyAMA0` can be enabled.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
On AArch64, interrupt controller (GIC) is emulated by KVM. VMM need to
set IRQ routing for devices, including legacy ones.
Before this commit, IRQ routing was only set for MSI. Legacy routing
entries of type KVM_IRQ_ROUTING_IRQCHIP were missing. That is way legacy
devices (like serial device ttyS0) does not work.
The setting of X86 IRQ routing entries are not impacted.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Extend the existing url_to_path() to take the URL string and then use
that to simplify the snapshot/restore code paths.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Relies on the preliminary work allowing virtio devices to be updated
with a single memory at a time instead of updating the entire memory at
once.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The MMIO structure contains the length rather than the maximum address
so it is necessary to subtract the starting address from the end address
to calculate the length.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Load the sections backed from the file into their required addresses in
memory and populate the HOB with details of the memory. Using the HOB
address initialize the TDX state in the vCPUs and finalize the TDX
configuration.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add API to the hypervisor interface and implement for KVM to allow the
special TDX KVM ioctls on the VM and vCPU FDs.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When booting with TDX no kernel is supplied as the TDFV is responsible
for loading the OS. The requirement to have the kernel is still
currently enforced at the validation entry point; this change merely
changes function prototypes and stored state to use Option<> to support.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add the skeleton of the "tdx" feature with a module ready inside the
arch crate to store implementation details.
TEST=cargo build --features="tdx"
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When a vm is created with a pty device, on reboot the pty fd (sub
only) will only be associated with the vmm through the epoll event
loop. The fd being polled will have been closed due to the vm itself
dropping the pty files (and potentially reopening the fd index to a
different item making things quite confusing) and new pty fds will be
opened but not polled on for input.
This change creates a structure to encapsulate the information about
the pty fd (main File, sub File and the path to the sub File). On
reboot, a copy of the console and serial pty structs is then passed
down to the new Vm instance which will be used instead of creating a
new pty device.
This resolves the underlying issue from #2316.
Signed-off-by: William Douglas <william.r.douglas@gmail.com>
Now that virtio-mem devices can update VFIO mappings through dedicated
handlers, let's provide them from the DeviceManager.
Important to note these handlers should either be provided to virtio-mem
devices or to the unique virtio-iommu device. This must be mutually
exclusive.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of letting the VfioPciDevice take the decision on how/when to
perform the DMA mapping/unmapping, we move this to the DeviceManager
instead.
The point is to let the DeviceManager choose which guest memory regions
should be mapped or not. In particular, we don't want the virtio-mem
region to be mapped/unmapped as it will be virtio-mem device
responsibility to do so.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When memory is resized through ACPI, a new region is added to the guest
memory. This region must also be added to the corresponding memory zone
in order to keep everything in sync.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In particular update for the vmm-sys-util upgrade and all the other
dependent packages. This requires an updated forked version of
kvm-bindings (due to updated vfio-ioctls) but allowed the removal of our
forked version of kvm-ioctls.
The changes to the API from kvm-ioctls and vmm-sys-util required some
other minor changes to the code.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit moves both pci and vmm code from the internal vfio-ioctls
crate to the upstream one from the rust-vmm project.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that ExternalDmaMapping is defined in vm-device, let's use it from
there.
This commit also defines the function get_host_address_range() to move
away from the vfio-ioctls dependency.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The help information displayed for our `--disk` option is incorrect and
incomplete, e.g. missing the `direct` and `poll_queue` field.
Signed-off-by: Bo Chen <chen.bo@intel.com>
The main idea behind this commit is to remove all the complexity
associated with TX/RX handling for virtio-net. By using writev() and
readv() syscalls, we could get rid of intermediate buffers for both
queues.
The complexity regarding the TAP registration has been simplified as
well. The RX queue is only processed when some data are ready to be
read from TAP. The event related to the RX queue getting more
descriptors only serves the purpose to register the TAP file if it's not
already.
With all these simplifications, the code is more readable but more
performant as well. We can see an improvement of 10% for a single
queue device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This function can then be used by the TDX code to allocate the memory at
specific locations required for the TDVF to run from.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Update for clippy in Rust 1.50.0:
error: Unnecessary nested match
--> vmm/src/vm.rs:419:17
|
419 | / if let vm_device::BusError::MissingAddressRange = e {
420 | | warn!("Guest MMIO write to unregistered address 0x{:x}", gpa);
421 | | }
| |_________________^
|
= note: `-D clippy::collapsible-match` implied by `-D warnings`
help: The outer pattern can be modified to include the inner pattern.
--> vmm/src/vm.rs:418:17
|
418 | Err(e) => {
| ^ Replace this binding
419 | if let vm_device::BusError::MissingAddressRange = e {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ with this pattern
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#collapsible_match
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If the function can never return an error this is now a clippy failure:
error: this function's return value is unnecessarily wrapped by `Result`
--> virtio-devices/src/watchdog.rs:215:5
|
215 | / fn set_state(&mut self, state: &WatchdogState) -> io::Result<()> {
216 | | self.common.avail_features = state.avail_features;
217 | | self.common.acked_features = state.acked_features;
218 | | // When restoring enable the watchdog if it was previously enabled. We reset the timer
... |
223 | | Ok(())
224 | | }
| |_____^
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#unnecessary_wraps
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Depending on the host OS the code for looking up the time for the CMOS
make require extra syscalls to be permitted for the vCPU thread.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
With all the preliminary work done in the previous commits, we can
update the VFIO implementation to support INTx along with MSI and MSI-X.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Here we are adding the PCI routing table, commonly called _PRT, to the
ACPI DSDT. For simplification reasons, we chose not to implement PCI
links as this involves dynamic decision from the guest OS, which result
in lots of complexity both from an AML perspective and from a device
manager perspective.
That's why the _PRT creates a static list of 32 entries, each assigned
with the IRQ number previously reserved by the device manager.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to support INTx for PCI devices, each PCI device must be
assigned an IRQ. This is preliminary work to reserve 8 IRQs which will
be shared across the 32 PCI devices.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for accessing the legacy interrupt manager from the
function creating a VFIO PCI device, we store it as part of the
DeviceManager, to make it available for all methods.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The DeviceManager already has a hold onto the MSI interrupt manager,
therefore there's no need to pass it through every function. Instead,
let's simplify the code by using the attribute from DeviceManager's
instance.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Both GIC and IOAPIC must implement a new method notifier() in order to
provide the caller with an EventFd corresponding to the IRQ it refers
to.
This is needed in anticipation for supporting INTx with VFIO PCI
devices.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for supporting the notifier function for the legacy
interrupt source group, we need this function to return an EventFd
instead of a reference to this same EventFd.
The reason is we can't return a reference when there's an Arc<Mutex<>>
involved in the call chain.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Swap the last two parameters of guest_mem_{read,write} to be consistent
with other read / write functions.
Use more descriptive parameter names.
No functional change.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
This reflects that it generates CPUID state used across all vCPUs.
Further ensure that errors from this function get correctly propagated.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Move the code for populating the CPUID with KVM HyperV emulation details from
the per-vCPU CPUID handling code to the shared CPUID handling code.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Move the code for populating the CPUID with details of the CPU
identification from the per-vCPU CPUID handling code to the shared CPUID
handling code.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Move the code for populating the CPUID with details of the maximum
address space from the per-vCPU CPUID handling code to the shared CPUID
handling code.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add the ability for cloud-hypervisor to create, manage and monitor a
pty for serial and/or console I/O from a user. The reasoning for
having cloud-hypervisor create the ptys is so that clients, libvirt
for example, could exit and later re-open the pty without causing I/O
issues. If the clients were responsible for creating the pty, when
they exit the main pty fd would close and cause cloud-hypervisor to
get I/O errors on writes.
Ideally the main and subordinate pty fds would be kept in the main
vmm's Vm structure. However, because the device manager owns parsing
the configuration for the serial and console devices, the information
is instead stored in new fields under the DeviceManager structure
directly.
From there hooking up the main fd is intended to look as close to
handling stdin and stdout on the tty as possible (there is some future
work ahead for perhaps moving support for the pty into the
vmm_sys_utils crate).
The main fd is used for reading user input and writing to output of
the Vm device. The subordinate fd is used to setup raw mode and it is
kept open in order to avoid I/O errors when clients open and close the
pty device.
The ability to handle multiple inputs as part of this change is
intentional. The current code allows serial and console ptys to be
created and both be used as input. There was an implementation gap
though with the queue_input_bytes needing to be modified so the pty
handlers for serial and console could access the methods on the serial
and console structures directly. Without this change only a single
input source could be processed as the console would switch based on
its input type (this is still valid for tty and isn't otherwise
modified).
Signed-off-by: William Douglas <william.r.douglas@gmail.com>
Use the newly added hugepages_size option if provided by the user to
pick a huge page size when creating the memfd region. If none is
specified use the system default.
Sadly different huge pages cannot be tested by an integration test as
creating a pool of the non-default size cannot be done at runtime
(requires kernel to be booted with certain parameters.)
TETS=Manually tested with a kernel booted with both 1GiB and 2MiB huge
pages (hugepagesz=1G hugepages=1 hugepagesz=2M hugepages=512)
Fixes: #2230
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows the user to use an alternative huge page size otherwise the
default size will be used.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit introduces a new information to the VirtioMemZone structure
in order to know if the memory zone is backed by hugepages.
Based on this new information, the virtio-mem device is now able to
determine if madvise(MADV_DONTNEED) should be performed or not. The
madvise documentation specifies that MADV_DONTNEED advice will fail if
the memory range has been allocated with some hugepages.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Hui Zhu <teawater@antfin.com>
By introducing a ResizeSender object, we avoid having a Resize clone
with a different content than the original Resize object.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Relying on the simplified version of the synchronous support for RAW
disk files, the new fixed_vhd_sync module in the block_util crate
introduces the synchronous support for fixed VHD disk files.
With this patch, the fixed VHD support is complete as it is implemented
in both synchronous and asynchronous versions.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Using directly preadv and pwritev, we can simply use a RawFd instead of
a file, and we don't need to use the more complex implementation from
the qcow crate.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit adds the asynchronous support for fixed VHD disk files.
It introduces FixedVhd as a new ImageType, moving the image type
detection to the block_util crate (instead of qcow crate).
It creates a new vhd module in the block_util crate in order to handle
VHD footer, following the VHD specification.
It creates a new fixed_vhd_async module in the block_util crate to
implement the asynchronous version of fixed VHD disk file. It relies on
io_uring.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
_EJx built in should not return.
dsdt.dsl 813: Return (CEJ0 (0x00))
Warning 3104 - ^ Reserved method should not return a value (_EJ0)
dsdt.dsl 813: Return (CEJ0 (0x00))
Error 6080 - ^ Called method returns no value
Fixes: #2216
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The mutex timeout should be 0xffff rather than 0xfff to disable the
timeout feature.
dsdt.dsl 745: Acquire (\_SB.PRES.CPLK, 0x0FFF)
Warning 3130 - ^ Result is not used, possible operator timeout will be missed
dsdt.dsl 767: Acquire (\_SB.PRES.CPLK, 0x0FFF)
Warning 3130 - ^ Result is not used, possible operator timeout will be missed
dsdt.dsl 775: Acquire (\_SB.PRES.CPLK, 0x0FFF)
Warning 3130 - ^ Result is not used, possible operator timeout will be missed
Fixes: #2216
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This patch enables multi-queue support for creating virtio-net devices by
accepting multiple TAP fds, e.g. '--net fds=3:7'.
Fixes: #2164
Signed-off-by: Bo Chen <chen.bo@intel.com>
Building with 1.51 nightly produces the following warning:
warning: unnecessary trailing semicolon
--> vmm/src/device_manager.rs:396:6
|
396 | };
| ^ help: remove this semicolon
|
= note: `#[warn(redundant_semicolons)]` on by default
warning: 1 warning emitted
Signed-off-by: Wei Liu <liuwe@microsoft.com>
This skeleton commit brings in the support for compiling aarch64 with
the "acpi" feature ready to the ACPI enabling. It builds on the work to
move the ACPI hotplug devices from I/O ports to MMIO and conditionalises
any code that is x86_64 only (i.e. because it uses an I/O port.)
Filling in the aarch64 specific details in tables such as the MADT it
out of the scope.
See: #2178
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
It might be useful debugging information for the user to know what kind
of disk file implementation is in use.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that BlockIoUring is the only implementation of virtio-block,
handling both synchronous and asynchronous backends based on the
AsyncIo trait, we can rename it to Block.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the synchronous QCOW file implementation present in the qcow
crate, we created a new qcow_sync module in block_util that ports this
synchronous implementation to the AsyncIo trait.
The point is to reuse virtio-blk asynchronous implementation for both
synchronous and asynchronous backends.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the synchronous RAW file implementation present in the qcow
crate, we created a new raw_sync module in block_util that ports this
synchronous implementation to the AsyncIo trait.
The point is to reuse virtio-blk asynchronous implementation for both
synchronous and asynchronous backends.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the new DiskFile and AsyncIo traits, the implementation of
asynchronous block support does not have to be tied to io_uring anymore.
Instead, the only thing the virtio-blk implementation knows is that it
is using an asynchronous implementation of the underlying disk file.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Currently the GED control is in a fixed I/O port address but instead use
an MMIO address that has been chosen by the allocator.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This patch refines the sccomp filter list for the vCPU thread, as we are
no longer spawning virtio-device threads from the vCPU thread.
Fixes: #2170
Signed-off-by: Bo Chen <chen.bo@intel.com>
This will lead to the triggering of an ACPI button inside the guest in
order to cleanly shutdown the guest.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Use the ACPI GED device to trigger a notitifcation of type
POWER_BUTTON_CHANGED which will ultimately lead to the guest being
notified.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Renamed this bitfield as it will also be used for non-hotplug purposes
such as synthesising a power button.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Older libc (like RHEL7) uses open() rather than openat(). This was
demonstrated through a failure to open /etc/localtime as used by
gmtime() libc call trigged from the vCPU thread (CMOS device.)
Fixes: #2111
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Sometimes when running under the CI tests fail due to a barrier not
being released and the guest blocks on an MMIO write. Add further
debugging to try and identify the issue.
See: #2118
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Based on the LKML feedback, the devices under /dev/sgx/* are
not justified. SGX RFC v40 moves the SGX device nodes to /dev/sgx_*
and this is reflected in kvm-sgx (next branch) too.
Update cloud-hypervisor code and documentation to follow this.
Signed-off-by: Mikko Ylinen <mikko.ylinen@intel.com>
If the vCPU thread calls log!() the time difference between the call
time and the boot up time is reported. On most environments and
architectures this covered by a vDSO call rather than a syscall. However
on some platforms this turns into a syscall.
Fixes: #2080
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
With Rust 1.49 using attributes on a function parameter is not allowed.
The recommended workaround is to put it in a new block.
error[E0658]: attributes on expressions are experimental
--> vmm/src/memory_manager.rs:698:17
|
698 | #[cfg(target_arch = "x86_64")]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #15701 <https://github.com/rust-lang/rust/issues/15701> for more information
error: removing an expression is not supported in this position
--> vmm/src/memory_manager.rs:698:17
|
698 | #[cfg(target_arch = "x86_64")]
|
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add an "fd=" parameter to allow specifying a TAP fd to use. Currently
only one fd for one queue pair is supported.
Fixes: #2052
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When a device is ready to be activated signal to the VMM thread via an
EventFd that there is a device to be activated. When the VMM receives a
notification on the EventFd that there is a device to be activated
notify the device manager to attempt to activate any devices that have
not been activated.
As a side effect the VMM thread will create the virtio device threads.
Fixes: #1863
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This can be uses to indicate to the caller that it should wait on the
barrier before returning as there is some asynchronous activity
triggered by the write which requires the KVM exit to block until it's
completed.
This is useful for having vCPU thread wait for the VMM thread to proceed
to activate the virtio devices.
See #1863
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This is the initial folder structure of the mshv module inside
the hypervisor crate. The aim of this module is to support Microsoft
Hyper-V as a supported Hypervisor.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
There are some code base and function which are purely KVM specific for
now and we don't have those supports in mshv at the moment but we have plan
for the future. We are doing a feature guard with KVM. For example, KVM has
mp_state, cpu clock support, which we don't have for mshv. In order to build
those code we are making the code base for KVM specific compilation.
Signed-off-by: Muminul Islam <muislam@microsoft.com>
When using an PIO write to 0x80 which is a special case handle that and
then return without going through the resolve.
This removes an extra warning that is reported.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When a total ordering between multiple atomic variables is not required
then use Ordering::Acquire with atomic loads and Ordering::Release with
atomic stores.
This will improve performance as this does not require a memory fence
on x86_64 which Ordering::SeqCst will use.
Add a comment to the code in the vCPU handling code where it operates on
multiple atomics to explain why Ordering::SeqCst is required.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The DeviceNode cannot be fully represented as it embeds a Rust style
enum (i.e. with data) which is instead represented by a simple
associative array.
Fixes: #1167
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The configuration is stored separately to the Vm in the VMM. The failure
to store the config was preventing the VM from shutting down correctly
as Vmm::vm_delete() checks for the presence of the config.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The live migration support added use of this ioctl but it wasn't
included in the permitted list.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This interface is used by the vCPU thread to delegate responsibility for
handling MMIO/PIO operations and to support different approaches than a
VM exit.
During profiling I found that we were spending 13.75% of the boot CPU
uage acquiring access to the object holding the VmmOps via
ArcSwap::load_full()
13.75% 6.02% vcpu0 cloud-hypervisor [.] arc_swap::ArcSwapAny<T,S>::load_full
|
---arc_swap::ArcSwapAny<T,S>::load_full
|
--13.43%--<hypervisor::kvm::KvmVcpu as hypervisor::cpu::Vcpu>::run
std::sys_common::backtrace::__rust_begin_short_backtrace
core::ops::function::FnOnce::call_once{{vtable-shim}}
std::sys::unix:🧵:Thread:🆕:thread_start
However since the object implementing VmmOps does not need to be mutable
and it is only used from the vCPU side we can change the ownership to
being a simple Arc<> that is passed in when calling create_vcpu().
This completely removes the above CPU usage from subsequent profiles.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add config parameter to --disk called "_disable_io_uring" (the
underscore prefix indicating it is not for public consumpion.) Use this
option to disable io_uring if it would otherwise be used.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Now the VM is paused/resumed by the migration process itself.
0. The guest configuration is sent to the destination
1. Dirty page log tracking is started by start_memory_dirty_log()
2. All guest memory is sent to the destination
3. Up to 5 attempts are made to send the dirty guest memory to the
destination...
4. ...before the VM is paused
5. One last set of dirty pages is sent to the destination
6. The guest is snapshotted and sent to the destination
7. When the migration is completed the destination unpauses the received
VM.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows code running in the VMM to access the VM's MemoryManager's
functionality for managing the dirty log including resetting it but also
generating a table.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Prior to sending the memory the full state is not needed only the
configuration. This is sufficient to create the appropriate structures
in the guest and have the memory allocations ready for filling.
Update the protocol documentation to add a separate config step and move
the state to after the memory is transferred. As the VM is created in a
separate step to restoring it the requires a slightly different
constructor as well as saving the VM object for the subsequent commands.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to do this we must extend the MemoryManager API to add the
ability to specify the tracking of the dirty pages when creating the
userspace mappings and also keep track of the userspace mappings that
have been created for RAM regions.
Currently the dirty pages are collected into ranges based on a block
level of 64 pages. The algorithm could be tweaked to create smaller
ranges but for now if any page in the block of 64 is dirty the whole
block is added to the range.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
While the addressable space size reduction of 4k in necessary due to
the Linux bug, the 64k alignment of the addressable space size is
required by Windows. This patch satisfies both.
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
This is tested by:
Source VMM:
target/debug/cloud-hypervisor --kernel ~/src/linux/vmlinux \
--pmem file=~/workloads/focal.raw --cpus boot=1 \
--memory size=2048M \
--cmdline"root=/dev/pmem0p1 console=ttyS0" --serial tty --console off \
--api-socket=/tmp/api1 -v
Destination VMM:
target/debug/cloud-hypervisor --api-socket=/tmp/api2 -v
And the following commands:
target/debug/ch-remote --api-socket=/tmp/api1 pause
target/debug/ch-remote --api-socket=/tmp/api2 receive-migration unix:/tmp/foo &
target/debug/ch-remote --api-socket=/tmp/api1 send-migration unix:/tmp/foo
target/debug/ch-remote --api-socket=/tmp/api2 resume
The VM is then responsive on the destination VMM.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows the code to be reused when creating the VM from a snapshot
when doing VM migration.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add API entry points with stub implementation for sending and receiving
a VM from one VMM to another.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Due to a known limitation in OpenAPITools/openapi-generator tool,
it's impossible to send go zero types, like false and 0 to
cloud-hypervisor because `omitempty` is added if a field is not
required.
Set cache_size, dax, num_queues and queue_size as required to remove
`omitempty` from the json tag.
fixes#1961
Signed-off-by: Julio Montes <julio.montes@intel.com>
This also removes the need to lookup up the "exe" symlink for finding
the VMM executable path.
Fixes: #1925
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The logic to handle AArch64 system event was: SHUTDOWN and RESET were
all treated as RESET.
Now we handle them differently:
- RESET event will trigger Vmm::vm_reboot(),
- SHUTDOWN event will trigger Vmm::vm_shutdown().
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Now Vcpu::run() returns a boolean value to VcpuManager, indicating
whether the VM is going to reboot (false) or just continue (true).
Moving the handling of hypervisor VCPU run result from Vcpu to
VcpuManager gives us the flexibility to handle more scenarios like
shutting down on AArch64.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Rather than filling the guest memory from a file at the point of the the
guest memory region being created instead fill from the file later. This
simplifies the region creation code but also adds flexibility for
sourcing the guest memory from a source other than an on disk file.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
As a mirror of bdbea19e23 which ensured
that GuestMemoryMmap::read_exact_from() was used to read all the file to
the region ensure that all the guest memory region is written to disk.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This gives a nicer user experience and this error can now be used as the
source for other errors based off this.
See: #1910
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Any occurrence of of a variable containing `ext_region` is replaced with
the less confusing name `saved_region`. The point is to clearly identify
the memory regions that might have been saved during a snapshot, while
the `ext` standing for `external` was pretty unclear.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In the context of saving the memory regions content through snapshot,
using the term "backing file" brings confusion with the actual backing
file that might back the memory mapping.
To avoid such conflicting naming, the 'backing_file' field from the
MemoryRegion structure gets replaced with 'content', as this is
designating the potential file containing the memory region data.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Use GuestRegionMmap::read_exact_from() to ensure that all of the file is
read into the guest. This addresses an issue where
GuestRegionMmap::read_from() was only copying the first 2GiB of the
memory and so lead to snapshot-restore was failing when the guest RAM
was 2GiB or greater.
This change also propagates any error from the copying upwards.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When restoring if a region of RAM is backed by anonymous memory i.e from
memfd_create() then copy the contents of the ram from the file that has
been saved to disk.
Previously the code would map the memory from that file into the guest
using a MAP_PRIVATE mapping. This has the effect of
minimising the restore time but provides an issue where the restored VM
does not have the same structure as the snapshotted VM, in particular
memory is backed by files in the restored VM that were anonymously
backed in the original.
This creates two problems:
* The snapshot data is mapped from files for the pages of the guest
which prevents the storage from being reclaimed.
* When snapshotting again the guest memory will not be correctly saved
as it will have looked like it was backed by a file so it will not be
written to disk but as it is a MAP_PRIVATE mapping the changes will
never be written to the disk again. This results in incorrect
behaviour.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The standalone `--balloon` parameter being fully functional at this
point, we can get rid of the balloon options from the --memory
parameter.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that we have a new dedicated way of asking for a balloon through the
CLI and the REST API, we can move all the balloon code to the device
manager. This allows us to simplify the memory manager, which is already
quite complex.
It also simplifies the behavior of the balloon resizing command. Instead
of providing the expected size for the RAM, which is complex when memory
zones are involved, it now expects the balloon size. This is a much more
straightforward behavior as it really resizes the balloon to the desired
size. Additionally to the simplication, the benefit of this approach is
that it does not need to be tied to the memory manager at all.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This introduces a new way of defining the virtio-balloon device. Instead
of going through the --memory parameter, the idea is to consider balloon
as a standalone virtio device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The snasphot/restore feature is not working because some CPU states are
not properly saved, which means they can't be restored later on.
First thing, we ensure the CPUID is stored so that it can be properly
restored later. The code is simplified and pushed down to the hypervisor
crate.
Second thing, we identify for each vCPU if the Hyper-V SynIC device is
emulated or not. In case it is, that means some specific MSRs will be
set by the guest. These MSRs must be saved in order to properly restore
the VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The watchdog device is created through the "--watchdog" parameter. At
most a single watchdog can be created per VM.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Before Virtio-mmio was removed, we passed an optional PCI space address
parameter to AArch64 code for generating FDT. The address is none if the
transport is MMIO.
Now Virtio-PCI is the only option, the parameter is mandatory.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
Virtio-mmio is removed, now virtio-pci is the only option for virtio
transport layer. We use MSI for PCI device interrupt. While GICv2, the
legacy interrupt controller, doesn't support MSI. So GICv2 is not very
practical for Cloud-hypervisor, we can remove it.
Signed-off-by: Michael Zhao <michael.zhao@arm.com>
When shutting down a VM using VFIO, the following error has been
detected:
vfio-ioctls/src/vfio_device.rs:312 -- Could not delete VFIO group:
KvmSetDeviceAttr(Error(9))
After some investigation, it appears the KVM device file descriptor used
for removing a VFIO group was already closed. This is coming from the
Rust sequence of Drop, from the DeviceManager all the way down to
VfioDevice.
Because the DeviceManager owns passthrough_device, which is effectively
a KVM device file descriptor, when the DeviceManager is dropped, the
passthrough_device follows, with the effect of closing the KVM device
file descriptor. Problem is, VfioDevice has not been dropped yet and it
still needs a valid KVM device file descriptor.
That's why the simple way to fix this issue coming from Rust dropping
all resources is to make Linux accountable for it by duplicating the
file descriptor. This way, even when the passthrough_device is dropped,
the KVM file descriptor is closed, but a duplicated instance is still
valid and owned by the VfioContainer.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We turn on that emulation for Windows. Windows does not have KVM's PV
clock, so calling notify_guest_clock_paused results in an error.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
If the user specified a maximum physical bits value through the
`max_phys_bits` option from `--cpus` parameter, the guest CPUID
will be patched accordingly to ensure the guest will find the
right amount of physical bits.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If the user provided a maximum physical bits value for the vCPUs, the
memory manager will adapt the guest physical address space accordingly
so that devices are not placed further than the specified value.
It's important to note that if the number exceed what is available on
the host, the smaller number will be picked.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to let the user choose maximum address space size, this patch
introduces a new option `max_phys_bits` to the `--cpus` parameter.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The 'GuestAddress::unchecked_add' function has undefined behavior when
an overflow occurs. Its alternative 'checked_add' requires use to handle
the overflow explicitly.
Signed-off-by: Bo Chen <chen.bo@intel.com>
We are now reserving a 256M gap in the guest address space each time
when hotplugging memory with ACPI, which prevents users from hotplugging
memory to the maximum size they requested. We confirm that there is no
need to reserve this gap.
This patch removes the 'reserved gaps'. It also refactors the
'MemoryManager::start_addr' so that it is rounding-up to 128M alignment
when hotplugged memory is allowed with ACPI.
Signed-off-by: Bo Chen <chen.bo@intel.com>
We now try to create a ram region of size 0 when the requested memory
size is the same as current memory size. It results in an error of
`GuestMemoryRegion(Mmap(Os { code: 22, kind: InvalidInput, message:
"Invalid argument" }))`. This error is not meaningful to users and we
should not report it.
Signed-off-by: Bo Chen <chen.bo@intel.com>
This is a new clippy check introduced in 1.47 which requires the use of
the matches!() macro for simple match blocks that return a boolean.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The OneRegister literally means "one (arbitrary) register". Just call it
"Register" instead. There is no need to inherit KVM's naming scheme in
the hypervisor agnostic code.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
Small patch creating a dedicated `block_io_uring_is_supported()`
function for the non-io_uring case, so that we can simplify the
code in the DeviceManager.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Without the unlink(2) syscall being allowed, Cloud-Hypervisor crashes
when we remove a virtio-vsock device that has been previously added.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Because of the PCI refactoring that happened in the previous commit
d793cc4da3, the ability to fully remove a
PCI device was altered.
The refactoring was correct, but the usage of a generic function to pass
the same reference for both BusDevice, PciDevice and Any + Send + Sync
causes the Arc::ptr_eq() function to behave differently than expected,
as it does not match the references later in the code. That means we
were not able to remove the device reference from the MMIO and/or PIO
buses, which was leading to some bus range overlapping error once we
were trying to add a device again to the previous range that should have
been removed.
Fixes#1802
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Run loop in hypervisor needs a callback mechanism to access resources
like guest memory, mmio, pio etc.
VmmOps trait is introduced here, which is implemented by vmm module.
While handling vcpuexits in run loop, this trait allows hypervisor
module access to the above mentioned resources via callbacks.
Signed-off-by: Praveen Paladugu <prapal@microsoft.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
A new version of vm-memory was released upstream which resulted in some
components pulling in that new version. Update the version number used
to point to the latest version but continue to use our patched version
due to the fix for #1258
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The PMEM support has an option called "discard_writes" which when true
will prevent changes to the device from hitting the backing file. This
is trying to be the equivalent of "readonly" support of the block
device.
Previously the memory of the device was marked as KVM_READONLY. This
resulted in a trap when the guest attempted to write to it resulting a
VM exit (and recently a warning). This has a very detrimental effect on
the performance so instead make "discard_writes" truly CoW by mapping
the memory as `PROT_READ | PROT_WRITE` and using `MAP_PRIVATE` to
establish the CoW mapping.
Fixes: #1795
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The virtio-balloon change the memory size is asynchronous.
VirtioBalloonConfig.actual of balloon device show current balloon size.
This commit add memory_actual_size to vm.info to show memory actual size.
Signed-off-by: Hui Zhu <teawater@antfin.com>
Write to the exit_evt EventFD which will trigger all the devices and
vCPUs to exit. This is slightly cleaner than just exiting the process as
any temporary files will be removed.
Fixes: #1242
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This patch adds the missing the `iommu` and `id` option for
`VmAddDevice` in the openApi yaml to respect the internal data structure
in the code base. Also, setting the `id` explicitly for VFIO device
hotplug is required for VFIO device unplug through openAPI calls.
Signed-off-by: Bo Chen <chen.bo@intel.com>
According to openAPI specification [1], the format for `integer` types
can be only `int32` or `int64`, unsigned and 8-bits integers are not
supported.
This patch replaces `uint64` with `int64`, `uint32` with `int32` and
`uint8` with `int32`.
[1]: https://swagger.io/specification/#data-types
Signed-off-by: Julio Montes <julio.montes@intel.com>
MsiInterruptGroup doesn't need to know the internal field names of
InterruptRoute. Introduce two helper functions to eliminate references
to irq_fd. This is done similarly to the enable and disable helper
functions.
Also drop the pub keyword from InterruptRoute fields. It is not needed
anymore.
No functional change.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
According to openAPI specification[1], the format for `integer` types
can be only `int32` or `int64`, unsigned integers are not supported.
This patch replaces `uint64` with `int64`.
[1]: https://swagger.io/specification/#data-types
Signed-off-by: Julio Montes <julio.montes@intel.com>
There is no point in manually dropping the lock for gsi_msi_routes then
instantly grabbing it again in set_gsi_routes.
Make set_gsi_routes take a reference to the routing hashmap instead.
No functional change intended.
Signed-off-by: Wei Liu <liuwe@microsoft.com>
The MTRR feature was missing from the CPUID, which is causing the guest
to ignore the MTRR settings exposed through dedicated MSRs.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since Cloud-Hypervisor currently support one single PCI bus, we must
reflect this through the MCFG table, as it advertises the first bus and
the last bus available. In this case both are bus 0.
This patch saves quite some time during guest kernel boot, as it
prevents from checking each bus for available devices.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The states of GIC should be part of the VM states. This commit
enables the AArch64 VM states save/restore by adding save/restore
of GIC states.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
The definition of libc::SYS_ftruncate on AArch64 is different
from that on x86_64. This commit unifies the previously hard-coded
syscall number for AArch64.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
`KVM_GET_REG_LIST` ioctl is needed in save/restore AArch64 vCPU.
Therefore we whitelist this ioctl in seccomp.
Also this commit unifies the `SYS_FTRUNCATE` syscall for x86_64
and AArch64.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Similarly as the VM booting process, on AArch64 systems,
the vCPUs should be created before the creation of GIC. This
commit refactors the vCPU save/restore code to achieve the
above-mentioned restoring order.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Since calling `KVM_GET_ONE_REG` before `KVM_VCPU_INIT` will
result in an error: Exec format error (os error 8). This commit
decouples the vCPU init process from `configure_vcpus`. Therefore
in the process of restoring the vCPUs, these vCPUs can be
initialized separately before started.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
The construction of `GICR_TYPER` register will need vCPU states.
Therefore this commit adds methods to extract saved vCPU states
from the cpu manager.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Unlike x86_64, the "interrupt_controller" in the device manager
for AArch64 is only a `Gic` object that implements the
`InterruptController` to provide the interrupt delivery service.
This is not the real GIC device so that we do not need to save
its states. Also, we do not need to insert it to the device_tree.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
The value of GIC register `GICR_TYPER` is needed in restoring
the GIC states. This commit adds a field in the GIC device struct
and a method to construct its value.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
In AArch64 systems, the state of GIC device can only be
retrieved from `KVM_GET_DEVICE_ATTR` ioctl. Therefore to implement
saving/restoring the GIC states, we need to make sure that the
GIC object (either the file descriptor or the device itself) can
be extracted after the VM is started.
This commit refactors the code of GIC creation by adding a new
field `gic_device_entity` in device manager and methods to set/get
this field. The GIC object can be therefore saved in the device
manager after calling `arch::configure_system`.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit adds a function which allows to save RDIST pending
tables to the guest RAM, as well as unit test case for it.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit adds the unit test cases for getting/setting the GIC
distributor, redistributor and ICC registers.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Adds 3 more unit test cases for AArch64:
*save_restore_core_regs
*save_restore_system_regs
*get_set_mpstate
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
This commit ports code from firecracker and refactors the existing
AArch64 code as the preparation for implementing save/restore
AArch64 vCPU, including:
1. Modification of `arm64_core_reg` macro to retrive the index of
arm64 core register and implemention of a helper to determine if
a register is a system register.
2. Move some macros and helpers in `arch` crate to the `hypervisor`
crate.
3. Added related unit tests for above functions and macros.
Signed-off-by: Henry Wang <Henry.Wang@arm.com>
Misspellings were identified by https://github.com/marketplace/actions/check-spelling
* Initial corrections suggested by Google Sheets
* Additional corrections by Google Chrome auto-suggest
* Some manual corrections
Signed-off-by: Josh Soref <jsoref@users.noreply.github.com>
virtio-mem device would use 'VIRTIO_MEM_F_ACPI_PXM' to add memory to NUMA
node, which MUST be existed, otherwise it will be assigned to node id 0,
even if user specify different node id.
According ACPI spec about Memory Affinity Structure, system hardware
supports hot-add memory region using 'Hot Pluggable | Enabled' flags.
Signed-off-by: Jiangbo Wu <jiangbo.wu@intel.com>
Use zone.host_numa_node to create memory zone, so that memory zone
can apply memory policy in according with host numa node ID
Signed-off-by: Jiangbo Wu <jiangbo.wu@intel.com>
If after the creation of the self-spawned backend, the VMM cannot create
the corresponding vhost-user frontend, the VMM must kill the freshly
spawned process in order to ensure the error propagation can happen.
In case the child process would still be around, the VMM cannot return
the error as it waits onto the child to terminate.
This should help us identify when self-spawned failures are caused by a
connection being refused between the VMM and the backend.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When the VMM is terminated by receiving a SIGTERM signal, the signal
handler thread must be able to invoke ioctl(TCGETS) and ioctl(TCSETS)
without error.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on all the preparatory work achieved through previous commits,
this patch updates the 'hotplugged_size' field for both MemoryConfig and
MemoryZoneConfig structures when either the whole memory is resized, or
simply when a memory zone is resized.
This fixes the lack of support for rebooting a VM with the right amount
of memory plugged in.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adding a new field to VirtioMemZone structure, as it lets us associate
with a particular virtio-mem region the amount of memory that should be
plugged in at boot.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This patch simplifies the code as we have one single Option for the
VirtioMemZone. This also prepares for storing additional information
related to the virtio-mem region.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Add the new option 'hotplugged_size' to both --memory-zone and --memory
parameters so that we can let the user specify a certain amount of
memory being plugged at boot.
This is also part of making sure we can store the virtio-mem size over a
reboot of the VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit gives the possibility to create a virtio-mem device with
some memory already plugged into it. This is preliminary work to be
able to reboot a VM with the virtio-mem region being already resized.
Signed-off-by: Hui Zhu <teawater@antfin.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that e820 tables are created from the 'boot_guest_memory', we can
simplify the memory manager code by adding the virtio-mem regions when
they are created. There's no need to wait for the first hotplug to
insert these regions.
This also anticipates the need for starting a VM with some memory
already plugged into the virtio-mem region.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to differentiate the 'boot' memory regions from the virtio-mem
regions, we store what we call 'boot_guest_memory'. This is useful to
provide the adequate list of regions to the configure_system() function
as it expects only the list of regions that should be exposed through
the e820 table.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The virtio-mem driver is generating some warnings regarding both size
and alignment of the virtio-mem region if not based on 128MiB:
The alignment of the physical start address can make some memory
unusable.
The alignment of the physical end address can make some memory
unusable.
For these reasons, the current patch enforces virtio-mem regions to be
128MiB aligned and checks the size provided by the user is a multiple of
128MiB.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that virtio-mem device accept a guest NUMA node as parameter, we
retrieve this information from the list of NUMA nodes. Based on the
memory zone associated with the virtio-mem device, we obtain the NUMA
node identifier, which we provide to the virtio-mem device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Implement support for associating a virtio-mem device with a specific
guest NUMA node, based on the ACPI proximity domain identifier.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
For more consistency and help reading the code better, this commit
renames all 'virtiomem*' variables into 'virtio_mem*'.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Implement a new VM action called 'resize-zone' allowing the user to
resize one specific memory zone at a time. This relies on all the
preliminary work from the previous commits to resize each virtio-mem
device independently from each others.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By adding a new parameter 'id' to the virtiomem_resize() function, we
prepare this function to be usable for both global memory resizing and
memory zone resizing.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
It's important to return the region covered by virtio-mem the first time
it is inserted as the device manager must update all devices with this
information.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the previous code changes, we can now update the MemoryManager
code to create one virtio-mem region and resizing handler per memory
zone. This will naturally create one virtio-mem device per memory zone
from the DeviceManager's code which has been previously updated as well.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for resizing support of an individual memory zone,
this commit introduces a new option 'hotplug_size' to '--memory-zone'
parameter. This defines the amount of memory that can be added through
each specific memory zone.
Because memory zone resize is tied to virtio-mem, make sure the user
selects 'virtio-mem' hotplug method, otherwise return an error.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Both MemoryManager and DeviceManager are updated through this commit to
handle the creation of multiple virtio-mem devices if needed. For now,
only the framework is in place, but the behavior remains the same, which
means only the memory zone created from '--memory' generates a
virtio-mem region that can be used for resize.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to anticipate the need for storing memory regions along with
virtio-mem information for each memory zone, we create a new structure
MemoryZone that will replace Vec<Arc<GuestRegionMmap>> in the hash map
MemoryZones.
This makes thing more logical as MemoryZones becomes a list of
MemoryZone sorted by their identifier.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Inject CPUID leaves for advertising KVM HyperV support when the
"kvm_hyperv" toggle is enabled. Currently we only enable a selection of
features required to boot.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Currently we don't need to do anything to service these exits but when
the synthetic interrupt controller is active an exit will be triggered
to notify the VMM of details of the synthetic interrupt page.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Some of the io_uring setup happens upon activation of the virtio-blk
device, which is initially triggered through an MMIO VM exit. That's why
the vCPU threads must authorize io_uring related syscalls.
This commit ensures the virtio-blk io_uring implementation can be used
along with the seccomp filters enabled.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Extract common code for adding devices to the PCI bus into its own
function from the VFIO and VIRTIO code paths.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This removes the dependency of the pci crate on the devices crate which
now only contains the device implementations themselves.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The goal of this commit is to rename the existing NUMA option 'id' with
'guest_numa_id'. This is done without any modification to the way this
option behaves.
The reason for the rename is caused by the observation that all other
parameters with an option called 'id' expect a string to be provided.
Because in this particular case we expect a u32 representing a proximity
domain from the ACPI specification, it's better to name it with a more
explicit name.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The way to describe guest NUMA nodes has been updated through previous
commits, letting the user describe the full NUMA topology through the
--numa parameter (or NumaConfig).
That's why we can remove the deprecated and unused 'guest_numa_node'
option.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the previous changes introducing new options for both memory
zones and NUMA configuration, this patch changes the behavior of the
NUMA node definition. Instead of relying on the memory zones to define
the guest NUMA nodes, everything goes through the --numa parameter. This
allows for defining NUMA nodes without associating any particular memory
range to it. And in case one wants to associate one or multiple memory
ranges to it, the expectation is to describe a list of memory zone
through the --numa parameter.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This new option provides a new way to describe the memory associated
with a NUMA node. This is the first step before we can remove the
'guest_numa_node' option from the --memory-zone parameter.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that we have an identifier per memory zone, and in order to keep
track of the memory regions associated with the memory zones, we create
and store a map referencing list of memory regions per memory zone ID.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation for allowing memory zones to be removed, but also in
anticipation for refactoring NUMA parameter, we introduce a mandatory
'id' option to the --memory-zone parameter.
This forces the user to provide a unique identifier for each memory zone
so that we can refer to these.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By introducing the SLIT (System Locality Distance Information Table), we
provide the guest with the distance between each node. This lets the
user describe the NUMA topology with a lot of details so that slower
memory backing the VM can be exposed as being further away from other
nodes.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the NumaConfig which now provides distance information, we can
internally update the list of NUMA nodes with the exact distances they
should be located from other nodes.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By introducing 'distances' option, we let the user describe a list of
destination NUMA nodes with their associated distances compared to the
current node (defined through 'id').
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the list of CPUs related to each NUMA node, Processor Local
x2APIC Affinity structures are created and included into the SRAT table.
This describes which CPUs are part of each node.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Relying on the list of CPUs defined through the NumaConfig, this patch
will update the internal list of CPUs attached to each NUMA node.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Through this new parameter, we give users the opportunity to specify a
set of CPUs attached to a NUMA node that has been previously created
from the --memory-zone parameter.
This parameter will be extended in the future to describe the distance
between multiple nodes.
For instance, if a user wants to attach CPUs 0, 1, 2 and 6 to a NUMA
node, here are two different ways of doing so:
Either
./cloud-hypervisor ... --numa id=0,cpus=0-2:6
Or
./cloud-hypervisor ... --numa id=0,cpus=0:1:2:6
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The SRAT table (System Resource Affinity Table) is needed to describe
NUMA nodes and how memory ranges and CPUs are attached to them.
For now it simply attaches a list of Memory Affinity structures based on
the list of NUMA nodes created from the VMM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the 'guest_numa_node' option, we create and store a list of
NUMA nodes in the MemoryManager. The point being to associate a list of
memory regions to each node, so that we can later create the ACPI tables
with the proper memory range information.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
With the introduction of this new option, the user will be able to
describe if a particular memory zone should belong to a specific NUMA
node from a guest perspective.
For instance, using '--memory-zone size=1G,guest_numa_node=2' would let
the user describe that a memory zone of 1G in the guest should be
exposed as being associated with the NUMA node 2.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Given that ACPI uses u32 as the type for the Proximity Domain, we can
use u32 instead of u64 as the type for 'host_numa_node' option.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
