The persistent memory will be hotplugged via DeviceManager and saved in
the config for later use.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Split it into a method that creates a single device which is called by
the multiple device version so this can be used when dynamically adding
a device.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit adds new option hotplug_method to memory config.
It can set the hotplug method to "acpi" or "virtio-mem".
Signed-off-by: Hui Zhu <teawater@antfin.com>
The persistent memory will be hotplugged via DeviceManager and saved in
the config for later use.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Split it into a method that creates a single device which is called by
the multiple device version so this can be used when dynamically adding
a device.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Split it into a method that creates a single device which is called by
the multiple device version so this can be used when dynamically adding
a device.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Whenever the VM memory is resized, DeviceManager needs to be notified
so that it can subsequently notify each virtio devices about it.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This separates the filters used between the VMM and API threads, so that
we can apply different rules for each thread.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit introduces the application of the seccomp filter to the VMM
thread. The filter is empty for now (SeccompLevel::None).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Based on the seccomp crate, we create a new vmm module responsible for
creating a seccomp filter that will be applied to the VMM main thread.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The seccomp crate from Firecracker is nicely implemented, documented and
tested, which is a good reason for relying on it to create and apply
seccomp filters.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This opens the backing file read-only, makes the pages in the mmap()
read-only and also makes the KVM mapping read-only. The file is also
mapped with MAP_PRIVATE to make the changes local to this process only.
This is functional alternative to having support for making a
virtio-pmem device readonly. Unfortunately there is no concept of
readonly virtio-pmem (or any type of NVDIMM/PMEM) in the Linux kernel so
to be able to have a block device that is appears readonly in the guest
requires significant specification and kernel changes.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Use this boolean to turn on the KVM_MEM_READONLY flag to indicate that
this memory mapping should not be writable by the VM.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
According to `asm-generic/termios.h`, the `struct winsize` should be:
struct winsize {
unsigned short ws_row;
unsigned short ws_col;
unsigned short ws_xpixel;
unsigned short ws_ypixel;
};
The ioctl of TIOCGWINSZ will trigger a segfault on aarch64.
Signed-off-by: Qiu Wenbo <qiuwenbo@phytium.com.cn>
This feature is stable and there is no need for this to be behind a
flag. This will also reduce the time needed to run the integration test
as we will not be running them all again under the flag.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This table currently contains only all the VFIO devices and it should
really contain all the PCI devices.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Previously this was only returned if the device had an IOMMU mapping and
whether the device should be added to the virtio-iommu. This was already
captured earlier as part of creating the device so use that information
instead.
Always returning the B/D/F is helpful as it facilitates virtio PCI
device hotplug.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
I spent a few minutes trying to understand why we were unconditionally
updating the VM config memory size, even if the guest memory resizing
did not happen.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
The IORT table for virtio-iommu use was removed and replaced with a
purely virtio based solution. Although the table construction was
removed these structures were left behind.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Use a new feature called "pvh_boot" to enable using the PVH boot
protocol if the guest kernel supports it. The feature can be enabled
by building with:
cargo build [--release] --features "pvh_boot"
Once performance has been evaluated, this can be made part of the
default set of features so that any guest that supports it boots
using PVH as the preferred option as is the case in QEMU.
Signed-off-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
Fill the hvm_start_info and related memory map structures as
specified in the PVH boot protocol. Write the data structures
to guest memory at the GPA that will be stored in %rbx when
the guest starts.
Signed-off-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
In order to properly initialize the kvm regs/sregs structs for
the guest, the load_kernel() return type must specify which
boot protocol to use with the entry point address it returns.
Make load_kernel() return an EntryPoint struct containing the
required information. This structure will later be used
in the vCPU configuration methods to setup the appropriate
initial conditions for the guest.
Signed-off-by: Alejandro Jimenez <alejandro.j.jimenez@oracle.com>
When using "--disk" with a vhost socket and not using self spawning then
it is not necessary or helpful to specify the path.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
By using a Vec to hold the list of devices on the PciBus, there's a
problem when we use unplug. Indeed, the vector of devices gets reduced
and if the unplugged device was not the last one from the list, every
other device after this one is shifted on the bus.
To solve this problem, a HashMap is used. This allows to keep track of
the exact place where each device stands on the bus.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The option desired_ram is in byte, make larger the amount of memory to
add.
Signed-off-by: Jose Carlos Venegas Munoz <jose.carlos.venegas.munoz@intel.com>
With some of the factorization that happened to be able to support VFIO
hotplug, one mistake was made. In case a vIOMMU is created through a
virtio-iommu device, and no matter the "iommu" option value from the
VFIO device parameter, the VFIO device was always placed behind the
virtual IOMMU.
This commit fixes this wrong behavior by making sure the device
configuration is taken into account to decide if it should be attached
or not to the virtual IOMMU.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Add a new id option to the VFIO hotplug command so that it matches the
VFIO coldplug semantic.
This is done by refactoring the existing code for VFIO hotplug, where
VmAddDeviceData structure is replaced by DeviceConfig. This structure is
the one used whenever a VFIO device is coldplugged, which is why it
makes sense to reuse it for the hotplug codepath.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Add the ability to specify the "id" associated with a device, by adding
an extra option to the parameter --device.
This new option is not mandatory, and by default, the VMM will take care
of finding a unique identifier.
If the identifier provided by the user through this new option is not
unique, an error will be thrown and the VM won't be started.
Fixes#881
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The 32 bits MMIO address space is handled separately from the 64 bits
one. For this reason, we need to invoke the appropriate freeing function
to remove a range from this address space.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that PciDevice trait has a dedicated function to remove the bars,
the DeviceManager can invoke this function whenever a PCI device is
unplugged from the VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Upon removal of a PCI device, make sure we don't hold onto the device ID
as it could be reused for another device later.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to handle the case where devices are very often plugged and
unplugged from a VM, we need to handle the PCI device ID allocation
better.
Any PCI device could be removed, which means we cannot simply rely on
the vector size to give the next available PCI device ID.
That's why this patch stores in memory the information about the 32
slots availability. Based on this information, whenever a new slot is
needed, the code can correctly provide an available ID, or simply return
an error because all slots are taken.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit ensures that when a VFIO device is hot-unplugged from the
VM, it is also removed from the VmConfig. This prevents a potential
reboot from creating the device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Add a new field to the DeviceConfig, allowing the VMM to allocate a name
to the VFIO devices.
By identifying a VFIO device with a unique name, we can make sure a user
can properly unplug it at any time.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit introduces the new command "remove-device" that will let a
user hot-unplug a VFIO PCI device from an already running VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit implements the eject function so that a VFIO device will be
removed from any bus it might sit on, and from any list it might be
stored in.
The idea is to reach a point where there is no reference of the device
anywhere in the code, so that the Drop implementation will be invoked
and so that the device will be fully removed from the VMM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When the guest OS is done removing a PCI device, it will invoke the _EJ0
method from ACPI, associated with the device. This will trigger a port
IO write to a region known by the VMM. Upon this writing, the VMM will
trap the VM exit and retrieve the written value.
Based on the value, the VMM will invoke its eject_device() method to
finalize the removal of the device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
As we try to keep track of every PCI device related to the VM, we don't
want to have separate lists depending on the concrete type associated
with the PciDevice trait. Also, we want to be able to cast the actual
type into any trait or concrete type.
The most efficient way to solve all these issues is to store every
device as an Arc<dyn Any + Send + Sync>. This gives the ability to
downcast into the appropriate concrete type, and then to cast back into
any trait that we might need.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Add a new list storing the device names across the entire codebase. VFIO
devices are added to the list whenever a new one is created. By default,
each VFIO device is given a name "vfioX" where X is the first available
integer.
Along with this new list of names, another list is created, grouping PCI
device's name with its associated b/d/f. This will be useful to keep
track of the created devices so that we can implement unplug
functionality.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The Vm structure was used to store a strong reference to the IO bus.
This is not needed anymore since the AddressManager is logically the
one holding this strong reference. This has been made possible by the
introduction of Weak references on the Bus structure itself.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that the BusDevice devices are stored as Weak references by the
IO and MMIO buses, there's no need to use Weak references from the
DeviceManager anymore.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that the BusDevice devices are stored as Weak references by the
IO and MMIO buses, there's no need to use Weak references from the
CpuManager anymore.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that the BusDevice devices are stored as Weak references by the IO
and MMIO buses, there's no need to use Weak references from the PciBus
anymore.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The point is to make sure the DeviceManager holds a strong reference of
each BusDevice inserted on the IO and MMIO buses. This will allow these
buses to hold Weak references onto the BusDevice devices.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The method add_vfio_device() from the DeviceManager needs to be mutable
if we want later to be able to update some internal fields from the
DeviceManager from this same function.
This commit simply takes care of making the necessary changes to change
this function as mutable.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
It's more logical to name the field referring to the DeviceManager as
"device_manager" instead of "devices".
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By inserting the DeviceManager on the IO bus, we introduced some cyclic
dependency:
DeviceManager ---> AddressManager ---> Bus ---> BusDevice
^ |
| |
+---------------------------------------------+
This cycle needs to be broken by inserting a Weak reference instead of
an Arc (considered as a strong reference).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Ensures the configuration is updated after a new device has been
hotplugged. In the event of a reboot, this means the new VM will be
started with the new device that had been previously hotplugged.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit finalizes the VFIO PCI hotplug support, based on all the
previous commits preparing for it.
One thing to notice, this does not support vIOMMU yet. This means we can
hotplug VFIO PCI devices, but we cannot attach them to an existing or a
new virtio-iommu device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This factorization is very important as it will allow both the standard
codepath and the VFIO PCI hotplug codepath to rely on the same function
to perform the addition of a new VFIO PCI device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Whenever the user wants to hotplug a new VFIO PCI device, the VMM will
have to trigger a hotplug notification through the GED device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit introduces the new command "add-device" that will let a user
hotplug a VFIO PCI device to an already running VM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Through the BusDevice implementation from the DeviceManager, and by
inserting the DeviceManager on the IO bus for a specific IO port range,
the VMM now has the ability to handle PCI device hotplug.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation of inserting the DeviceManager on the IO/MMIO buses,
the DeviceManager must implement the BusDevice trait.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Create a small method that will perform both hotplug of all the devices
identified by PCIU bitmap, and then perform the hotunplug of all the
devices identified by the PCID bitmap.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The _EJ0 method provides the guest OS a way to notify the VMM that the
device has been properly ejected from the guest OS. Only after this
point, the VMM can fully remove the device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This new PHPR device in the DSDT table introduces some specific
operation regions and the associated fields.
PCIU stands for "PCI up", which identifies PCI devices that must be
added.
PCID stands for "PCI down", which identifies PCI devices that must be
removed.
B0EJ stands for "Bus 0 eject", which identifies which device on the bus
has been ejected by the guest OS.
Thanks to these fields, the VMM and the guest OS can communicate while
performing hotplug/hotunplug operations.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Adds the DVNT method to the PCI0 device in the DSDT table. This new
method is responsible for checking each slot and notify the guest OS if
one of the slots is supposed to be added or removed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit introduces the ACPI support for describing the 32 device
slots attached to the main PCI host bridge.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In anticipation of the support for device hotplug, this commit moves the
DeviceManager object into an Arc<Mutex<>> when the DeviceManager is
being created. The reason is, we need the DeviceManager to implement the
BusDevice trait and then provide it to the IO bus, so that IO accesses
related to device hotplug can be handled correctly.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We want to prevent from losing interrupts while they are masked. The
way they can be lost is due to the internals of how they are connected
through KVM. An eventfd is registered to a specific GSI, and then a
route is associated with this same GSI.
The current code adds/removes a route whenever a mask/unmask action
happens. Problem with this approach, KVM will consume the eventfd but
it won't be able to find an associated route and eventually it won't
be able to deliver the interrupt.
That's why this patch introduces a different way of masking/unmasking
the interrupts, simply by registering/unregistering the eventfd with the
GSI. This way, when the vector is masked, the eventfd is going to be
written but nothing will happen because KVM won't consume the event.
Whenever the unmask happens, the eventfd will be registered with a
specific GSI, and if there's some pending events, KVM will trigger them,
based on the route associated with the GSI.
Suggested-by: Liu Jiang <gerry@linux.alibaba.com>
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Recently, vhost_user_block gained the ability of actively polling the
queue, a feature that can be disabled with the poll_queue property.
This change adds this property to DiskConfig, so it can be used
through the "disk" argument.
For the moment, it can only be used when vhost_user=true, but this
will change once virtio-block gets the poll_queue feature too.
Fixes: #787
Signed-off-by: Sergio Lopez <slp@redhat.com>
Fix "readonly" and "wce" defaults in cloud-hypervisor.yaml to match
their respective defaults in config.rs:DiskConfig.
Signed-off-by: Sergio Lopez <slp@redhat.com>
It's missing a few knobs (readonly, vhost, wce) that should be exposed
through the rest API.
Fixes: #790
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
The kernel does not adhere to the ACPI specification (probably to work
around broken hardware) and rather than busy looping after requesting an
ACPI reset it will attempt to reset by other mechanisms (such as i8042
reset.)
In order to trigger a reset the devices write to an EventFd (called
reset_evt.) This is used by the VMM to identify if a reset is requested
and make the VM reboot. As the reset_evt is part of the VMM and reused
for both the old and new VM it is possible for the newly booted VM to
immediately get reset as there is an old event sitting in the EventFd.
The simplest solution is to "drain" the reset_evt EventFd on reboot to
make sure that there is no spurious events in the EventFd.
Fixes: #783
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Relying on the latest vm-memory version, including the freshly
introduced structure GuestMemoryAtomic, this patch replaces every
occurrence of Arc<ArcSwap<GuestMemoryMmap> with
GuestMemoryAtomic<GuestMemoryMmap>.
The point is to rely on the common RCU-like implementation from
vm-memory so that we don't have to do it from Cloud-Hypervisor.
Fixes#735
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If no socket is supplied when enabling "vhost_user=true" on "--disk"
follow the "exe" path in the /proc entry for this process and launch the
network backend (via the vmm_path field.)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When a virtio-fs device is created with a dedicated shared region, by
default the region should be mapped as PROT_NONE so that no pages can be
faulted in.
It's only when the guest performs the mount of the virtiofs filesystem
that we can expect the VMM, on behalf of the backend, to perform some
new mappings in the reserved shared window, using PROT_READ and/or
PROT_WRITE.
Fixes#763
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
If no socket is supplied when enabling "vhost_user=true" on "--net"
follow the "exe" path in the /proc entry for this process and launch the
network backend (via the vmm_path field.)
Currently this only supports creating a new tap interface as the network
backend also only supports that.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
It is necessary to do this at the start of the VMM execution rather than
later as it must be done in the main thread in order to satisfy the
checks required by PTRACE_MODE_READ_FSCREDS (see proc(5) and
ptrace(2))
The alternative is to run as CAP_SYS_PTRACE but that has its
disadvantages.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If the ioctl syscall KVM_CREATE_VM gets interrupted while creating the
VM, it is expected that we should retry since EINTR should not be
considered a standard error.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Having the InterruptManager trait depend on an InterruptType forces
implementations into supporting potentially very different kind of
interrupts from the same code base. What we're defining through the
current, interrupt type based create_group() method is a need for having
different interrupt managers for different kind of interrupts.
By associating the InterruptManager trait to an interrupt group
configuration type, we create a cleaner design to support that need as
we're basically saying that one interrupt manager should have the single
responsibility of supporting one kind of interrupt (defined through its
configuration).
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
We create 2 different interrupt managers for separately handling
creation of legacy and MSI interrupt groups.
Doing so allows us to have a cleaner interrupt manager and IOAPIC
initialization path. It also prepares for an InterruptManager trait
design improvement where we remove the interrupt source type dependency
by associating an interrupt configuration type to the trait.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
A reference to the VmFd is stored on the AddressManager so it is not
necessary to pass in the VmInfo into all methods that need it as it can
be obtained from the AddressManager.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The DeviceManager has a reference to the MemoryManager so use that to
get the GuestMemoryMmap rather than the version stored in the VmInfo
struct.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Remove the use of vm_info in methods to get the config and instead use
the config stored on the DeviceManager itself.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Remove some in/out parameters and instead rely on them as members of the
&mut self parameter. This prepares the way to more easily store state on
the DeviceManager.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Remove some in/out parameters and instead rely on them as members of the
&mut self parameter. A follow-up commit will change the callee functions
that create the devices themselves.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Modify these functions to take an &mut self and become methods on
DeviceManager. This allows the removal of some in/out parameters and
leads the way to further refactoring and simplification.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The MemoryManager should only be included on the I/O bus when doing ACPI
builds as that is the only time it will be interrogated.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Currently the MemoryManager is only used on the ACPI code paths after
the DeviceManager has been created. This will change in a future commit
as part of the refactoring so for now always include it but name it with
underscore prefix to indicate it might not always be used.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Now that devices attached to the virtual IOMMU are described through
virtio configuration, there is no need for the DeviceManager to store
the list of IDs for all these devices. Instead, things are handled
locally when PCI devices are being added.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Instead of relying on the ACPI tables to describe the devices attached
to the virtual IOMMU, let's use the virtio topology, as the ACPI support
is getting deprecated.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Add a socket and vhost_user parameter to this option so that the same
configuration option can be used for both virtio-block and
vhost-user-block. For now it is necessary to specify both vhost_user
and socket parameters as auto activation is not yet implemented. The wce
parameter for supporting "Write Cache Enabling" is also added to the
disk configuration.
The original command line parameter is still supported for now and will
be removed in a future release.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add a socket and vhost_user parameter to this option so that the same
configuration option can be used for both virtio-net and vhost-user-net.
For now it is necessary to specify both vhost_user and socket parameters
as auto activation is not yet implemented. The original command line
parameter is still supported for now.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit improves the existing virtio-blk implementation, allowing
for better I/O performance. The cost for the end user is to accept
allocating more vCPUs to the virtual machine, so that multiple I/O
threads can run in parallel.
One thing to notice, the amount of vCPUs must be egal or superior to the
amount of queues dedicated to the virtio-blk device.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The number of queues and the size of each queue were not configurable.
In anticipation for adding multiqueue support, this commit introduces
some new parameters to let the user decide about the number of queues
and the queue size.
Note that the default values for each of these parameters are identical
to the default values used for vhost-user-blk, that is 1 for the number
of queues and 128 for the queue size.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Devices like virtio-pmem and virtio-fs require some dedicated memory
region to be mapped. The memory mapping from the DeviceManager is being
replaced by the usage of MmapRegion from the vm-memory crate.
The unmap will happen automatically when the MmapRegion will be dropped,
which should happen when the DeviceManager gets dropped.
Fixes#240
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Move GED device reporting of required device type to scan into an MMIO
region rather than an I/O port.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Rather than have the MemoryManager device sit on the I/O bus allocate
space for MMIO and add it to the MMIO bus.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit relies on the interrupt manager and the resulting interrupt
source group to abstract the knowledge about KVM and how interrupts are
updated and delivered.
This allows the entire "devices" crate to be freed from kvm_ioctls and
kvm_bindings dependencies.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The interrupt manager is passed to the IOAPIC creation, and the IOAPIC
now creates an InterruptSourceGroup for MSI interrupts based on it.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By introducing a new InterruptManager dedicated to the IOAPIC, we don't
have to solve the chicken and eggs problem about which of the
InterruptManager or the Ioapic should be created first. It's also
totally fine to have two interrupt manager instances as they both share
the same list of GSI routes and the same allocator.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
vhost_user_blk already has it, so it's only fair to give it to
virtio-blk too. Extend DiskConfig with a 'direct' property, honor
it while opening the file backing the disk image, and pass it to
vm_virtio::RawFile.
Fixes#631
Signed-off-by: Sergio Lopez <slp@redhat.com>
vhost_user_blk already has it, so it's only fair to give it to
virtio-blk too. Extend DiskConfig with a 'readonly' properly, and pass
it to vm_virtio::Block.
Signed-off-by: Sergio Lopez <slp@redhat.com>
The build is run against "--all-features", "pci,acpi", "pci" and "mmio"
separately. The clippy validation must be run against the same set of
features in order to validate the code is correct.
Because of these new checks, this commit includes multiple fixes
related to the errors generated when manually running the checks.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
There's no need for assign_irq() or assign_msix() functions from the
PciDevice trait, as we can see it's never used anywhere in the codebase.
That's why it's better to remove these methods from the trait, and
slightly adapt the existing code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since the InterruptManager is never stored into any structure, it should
be passed as a reference instead of being cloned.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit replaces the way legacy interrupts were handled with the
brand new implementation of the legacy InterruptSourceGroup for KVM.
Additionally, since it removes the last bit relying on the Interrupt
trait, the trait and its implementation can be removed from the
codebase.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit replaces the way legacy interrupts were handled with the
brand new implementation of the legacy InterruptSourceGroup for KVM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit replaces the way legacy interrupts were handled with the
brand new implementation of the legacy InterruptSourceGroup for KVM.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Relying on the previous commits, the legacy interrupt implementation can
be completed. The IOAPIC handler is used to deliver the interrupt that
will be triggered through the trigger() method.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
By having a reference to the IOAPIC, the KvmInterruptManager is going
to be able to initialize properly the legacy interrupt source group.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to be able to use the InterruptManager abstraction with
virtio-mmio devices, this commit introduces InterruptSourceGroup's
skeleton for legacy interrupts.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When KvmInterruptManager initializes a new InterruptSourceGroup, it's
only for PCI_MSI_IRQ case that it needs to allocate the GSI and create a
new InterruptRoute. That's why this commit moves the general code into
the specific use case.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
When the base InterruptIndex is different from 0, the loop allocating
GSI and HashMap entries won't work as expected. The for loop needs to
start from base, but the limit must be base+count so that we allocate
a number of "count" entries.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to let the InterruptManager be shared across both PCI and MMIO
devices, this commit moves the initialization earlier in the code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
After refactoring a common function is used to setup these slots and
that function takes care of allocating a new slot so it is not necessary
to reserve the initial region slots.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Based on all the previous changes, we can at this point replace the
entire interrupt management with the implementation of InterruptManager
and InterruptSourceGroup traits.
By using KvmInterruptManager from the DeviceManager, we can provide both
VirtioPciDevice and VfioPciDevice a way to pick the kind of
InterruptSourceGroup they want to create. Because they choose the type
of interrupt to be MSI/MSI-X, they will be given a MsiInterruptGroup.
Both MsixConfig and MsiConfig are responsible for the update of the GSI
routes, which is why, by passing the MsiInterruptGroup to them, they can
still perform the GSI route management without knowing implementation
details. That's where the InterruptSourceGroup is powerful, as it
provides a generic way to manage interrupt, no matter the type of
interrupt and no matter which hypervisor might be in use.
Once the full replacement has been achieved, both SystemAllocator and
KVM specific dependencies can be removed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
After the skeleton of InterruptManager and InterruptSourceGroup traits
have been implemented, this new commit takes care of fully implementing
the content of KvmInterruptManager (InterruptManager trait) and
MsiInterruptGroup (InterruptSourceGroup).
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This commit introduces an empty implementation of both InterruptManager
and InterruptSourceGroup traits, as a proper basis for further
implementation.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Callbacks are not the most Rust idiomatic way of programming. The right
way is to use a Trait to provide multiple implementation of the same
interface.
Additionally, a Trait will allow for multiple functions to be defined
while using callbacks means that a new callback must be introduced for
each new function we want to add.
For these two reasons, the current commit modifies the existing
VirtioInterrupt callback into a Trait of the same name.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Because MsixConfig will be responsible for updating KVM GSI routes at
some point, it is necessary that it can access the list of routes
contained by gsi_msi_routes.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Because MsixConfig will be responsible for updating the KVM GSI routes
at some point, it must have access to the VmFd to invoke the KVM ioctl
KVM_SET_GSI_ROUTING.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The point here is to let MsixConfig take care of the GSI allocation,
which means the SystemAllocator must be passed from the vmm crate all
the way down to the pci crate.
Once this is done, the GSI allocation and irq_fd creation is performed
by MsixConfig directly.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Because we will need to share the same list of GSI routes across
multiple PCI devices (virtio-pci, VFIO), this commit moves the creation
of such list to a higher level location in the code.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Use RawFile as backend instead of File. This allows us to abstract
the access to the actual image with a specialized layer, so we have a
place where we can deal with the low-level peculiarities.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Doing I/O on an image opened with O_DIRECT requires to adhere to
certain restrictions, requiring the following elements to be aligned:
- Address of the source/destination memory buffer.
- File offset.
- Length of the data to be read/written.
The actual alignment value depends on various elements, and according
to open(2) "(...) there is currently no filesystem-independent
interface for an application to discover these restrictions (...)".
To discover such value, we iterate through a list of alignments
(currently, 512 and 4096) calling pread() with each one and checking
if the operation succeeded.
We also extend RawFile so it can be used as a backend for QcowFile,
so the later can be easily adapted to support O_DIRECT too.
Signed-off-by: Sergio Lopez <slp@redhat.com>
Update the common part in net_util.rs under vm-virtio to add mq
support, meanwhile enable mq for virtio-net device, vhost-user-net
device and vhost-user-net backend. Multiple threads will be created,
one thread will be responsible to handle one queue pair separately.
To gain the better performance, it requires to have the same amount
of vcpus as queue pair numbers defined for the net device, due to
the cpu affinity.
Multiple thread support is not added for vhost-user-net backend
currently, it will be added in future.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Add num_queues and queue_size for virtio-net device to make them configurable,
while add the associated options in command line.
Update cloud-hypervisor.yaml with the new options for NetConfig.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Add support to allow VMMs to open the same tap device many times, it will
create multiple file descriptors meanwhile.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Since the common parts are put into net_util.rs under vm-virtio,
refactoring code for virtio-net device, vhost-user-net device
and backend to shrink the code size and improve readability
meanwhile.
Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
Use independent bits for storing whether there is a CPU or memory device
changed when reporting changes via ACPI GED interrupt. This prevents a
later notification squashing an earlier one and ensure that hotplugging
both CPU and memory at the same time succeeds.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If a new amount of RAM is requested in the VmResize command try and
hotplug if it an increase (MemoryManager::Resize() silently ignores
decreases.)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If there is a GED interrupt and the field indicates that the memory
device has changed triggers a scan of the memory devices.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Generate and expose the DSDT table entries required to support memory
hotplug. The AML methods call into the MemoryManager via I/O ports
exposed as fields.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Expose the details of hotplug RAM slots via an I/O port. This will be
consumed by the ACPI DSDT tables to report the hotplug memory details to
the guest.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Add a "resize()" method on MemoryManager which will create a new memory
allocation based on the difference between the desired RAM amount and
the amount already in use. After allocating the added RAM using the same
backing method as the boot RAM store the details in a vector and update
the KVM map and create a new GuestMemoryMmap and replace all the users.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
For now the new memory size is only used after a reboot but support for
hotplugging memory will be added in a later commit.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When the value is read from the I/O port via the ACPI AML functions to
determine what has been triggered the notifiction value is reset
preventing a second read from exposing the value. If we need support
multiple types of GED notification (such as memory hotplug) then we
should avoid reading the value multiple times.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This specifies how much address space should be reserved for hotplugging
of RAM. This space is reserved by adding move the start of the device
area by the desired amount.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to be able to support resizing either vCPUs or memory or both
make the fields in the resize command optional.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Make the GuestMemoryMmap from a Vec<Arc<GuestRegionMmap>> by using this
method we can persist a set of regions in the MemoryManager and then
extend this set with a newly created region. Ultimately that will allow
the hotplug of memory.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
If neither PCI or MMIO are built in, we should not bother creating any
virtio devices at all.
When building a minimal VMM made of a kernel with an initramfs and a
serial console, the RNG virtio device is still created even though there
is no way it can ever get probed.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Because virtio-iommu is still evolving (as it's only partly upstream),
some pieces like the ACPI declaration of the different nodes and devices
attached to the virtual IOMMU are changing.
This patch introduces a new ACPI table called VIOT, standing as the high
level table overseeing the IORT table and associated subtables.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This allows us to change the memory map that is being used by the
devices via an atomic swap (by replacing the map with another one). The
ArcSwap provides the mechanism for atomically swapping from to another
whilst still giving good read performace. It is inside an Arc so that we
can use a single ArcSwap for all users.
Not covered by this change is replacing the GuestMemoryMmap itself.
This change also removes some vertical whitespace from use blocks in the
files that this commit also changed. Vertical whitespace was being used
inconsistently and broke rustfmt's behaviour of ordering the imports as
it would only do it within the block.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This function will be useful for other parts of the VMM that also
estabilish their own mappings.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This removes the need to handle a mutable integer and also centralises
the allocation of these slot numbers.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The memory manager is responsible for setting up the guest memory and in
the long term will also handle addition of guest memory.
In this commit move code for creating the backing memory and populating
the allocator into the new implementation trying to make as minimal
changes to other code as possible.
Follow on commits will further reduce some of the duplicated code.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
To reflect updated clippy rules:
error: `if` chain can be rewritten with `match`
--> vmm/src/device_manager.rs:1508:25
|
1508 | / if ret > 0 {
1509 | | debug!("MSI message successfully delivered");
1510 | | } else if ret == 0 {
1511 | | warn!("failed to deliver MSI message, blocked by guest");
1512 | | }
| |_________________________^
|
= note: `-D clippy::comparison-chain` implied by `-D warnings`
= help: Consider rewriting the `if` chain to use `cmp` and `match`.
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#comparison_chain
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Address updated clippy errors:
error: redundant clone
--> vmm/src/device_manager.rs:699:32
|
699 | .insert(acpi_device.clone(), 0x3c0, 0x4)
| ^^^^^^^^ help: remove this
|
= note: `-D clippy::redundant-clone` implied by `-D warnings`
note: this value is dropped without further use
--> vmm/src/device_manager.rs:699:21
|
699 | .insert(acpi_device.clone(), 0x3c0, 0x4)
| ^^^^^^^^^^^
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_clone
error: redundant clone
--> vmm/src/device_manager.rs:737:26
|
737 | .insert(i8042.clone(), 0x61, 0x4)
| ^^^^^^^^ help: remove this
|
note: this value is dropped without further use
--> vmm/src/device_manager.rs:737:21
|
737 | .insert(i8042.clone(), 0x61, 0x4)
| ^^^^^
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_clone
error: redundant clone
--> vmm/src/device_manager.rs:754:29
|
754 | .insert(cmos.clone(), 0x70, 0x2)
| ^^^^^^^^ help: remove this
|
note: this value is dropped without further use
--> vmm/src/device_manager.rs:754:25
|
754 | .insert(cmos.clone(), 0x70, 0x2)
| ^^^^
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#redundant_clone
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When the running OS has been told that a CPU should be removed it will
shutdown the CPU and then signal to the hypervisor via the "_EJ0" method
on the device that ultimately writes into an I/O port than the vCPU
should be shutdown. Upon notification the hypervisor signals to the
individual thread that it should shutdown and waits for that thread to
end.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Allow the resizing of the number of vCPUs to less than the current
active vCPUs. This does not currently remove them from the system but
the kernel will take them offline.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When we add a vCPU set an "inserting" boolean that is exposed as an ACPI
field that will be checked for and reset when the ACPI GED notification
for CPU devices happens.
This change is a precursor for CPU unplug.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Continue to notify on all vCPUs but instead separate the notification
functionality into two methods, CSCN that walks through all the CPUs
and CTFY which notifies based on the numerical CPU id. This is an
interim step towards only notifying on changed CPUs and ultimately CPU
removal.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In anticipation for the writing of unit tests comparing two VmConfig
structures, this commit derives the PartialEq trait for VmConfig and
all embedded structures.
This patch also derives the Debug trait for the same set of structures
so that we can print them to facilitate debugging.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The OpenAPI should not have to provide a command line since the CLI
considers the command line as an empty string if nothing is provided.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This brings more modularity to the code, which will be helpful when we
will later test the CLI and OpenAPI generate the same VmConfig output.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Since the Snapshotable placeholder and Migratable traits are provided as
well, the DeviceManager object and all its objects are now Migratable.
All Migratable devices are tracked as Arc<Mutex<dyn Migratable>>
references.
Keeping track of all migratable devices allows for implementing the
Migratable trait for the DeviceManager structure, making the whole
device model potentially migratable.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Migratable devices can be virtio or legacy devices.
In any case, they can potentially be tracked through one of the IO bus
as an Arc<Mutex<dyn BusDevice>>. In order for the DeviceManager to also
keep track of such devices as Migratable trait objects, they must be
shared as mutable atomic references, i.e. Arc<Mutex<T>>. That forces all
Migratable objects to be tracked as Arc<Mutex<dyn Migratable>>.
Virtio devices are typically migratable, and thus for them to be
referenced by the DeviceManager, they now should be built as
Arc<Mutex<VirtioDevice>>.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
The FsConfig structure has been recently adjusted so that the default
value matches between OpenAPI and CLI. Unfortunately, with the current
description, there is no way from the OpenAPI to describe a cache_size
value "None", so that DAX does not get enabled. Usually, using a Rust
"Option" works because the default value is None. But in this case, the
default value is Some(8G), which means we cannot describe a None.
This commit tackles the problem, introducing an explicit parameter
"dax", and leaving "cache_size" as a simple u64 integer.
This way, the default value is dax=true and cache_size=8G, but it lets
the opportunity to disable DAX entirely with dax=false, which will
simply ignore the cache_size value.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to let the CLI and the HTTP API behave the same regarding the
VhostUserBlkConfig structure, this patch defines some default values
for num_queues, queue_size and wce.
num_queues is 1, queue_size is 128 and wce is true.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to let the CLI and the HTTP API behave the same regarding the
VhostUserNetConfig structure, this patch defines some default values
for num_queues, queue_size and mac.
num_queues is 2 since that's a pair of TX/RX queues, queue_size is 256
and mac is a randomly generated value.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
We want to set different default configurations for vhost-user-net and
vhost-user-blk, which is the reason why the common part corresponding to
the number of queues and the queue size cannot be embedded.
This prepares for the following commit, matching API and CLI behaviors.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
A simple patch making sure the field "file" is provisioned with the same
default value through CLI and OpenAPI.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Just making sure we have a serde default for the field "file" since it
is not a required field in the OpenAPI definition.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
All structures match between the OpenAPI definition and the internal
configuration code, that's why CpuConfig is being renamed into
CpusConfig.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The signal handling for vCPU signals has changed in the latest release
so switch to the new API.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
In order to let the CLI and the HTTP API behave the same regarding the
FsConfig structure, this patch defines some default values for
num_queues, queue_size and the cache_size.
num_queues is set to 1, queue_size is set to 1024, and cache_size is set
to Some(8G) which means that DAX is enabled by default with a shared
region of 8GiB.
Fixes#508
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to let the CLI and the HTTP API behave the same regarding the
NetConfig structure, this patch defines some default values for tap, ip,
mask, mac and iommu.
tap is None, ip is 192.168.249.1, mask is 255.255.255.0, mac is a
randomly generated value, and iommu is false.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Now that the GED device does not use a hardcoded IRQ number the starting
IRQ number can be restored (needed for the hardcoded serial port IRQ.)
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Remove the previously hardcoded IRQ number used for the GED device.
Instead allocate the IRQ using the allocator and use that value in the
definition in the ACPI device.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Move the code for handling the creation of the DSDT entries for devices
into the DeviceManager.
This will make it easier to handle device hotplug and also in the future
remove some hardcoded ACPI constants.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Move the code for generating the MADT (APIC) table and the DSDT
generation for CPU related functionality into the CpuManager.
There is no functional change just code rearrangement.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
When consumer of the HTTP API try to interact with cloud-hypervisor,
they have to provide the equivalent of the config structure related to
each component they need. Problem is, the Rust enum type "Option" cannot
be obtained from the OpenAPI YAML definition.
This patch intends to fix this inconsistency between what is possible
through the CLI and what's possible through the HTTP API by using simple
types bool and int64 instead of Option<u64>.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Previously the device setup code assumed that if no IOAPIC was passed in
then the device should be added to the kernel irqchip. As an earlier
change meant that there was always a userspace IOAPIC this kernel based
code can be removed.
The accessor still returns an Option type to leave scope for
implementing a situation without an IOAPIC (no serial or GED device).
This change does not add support no-IOAPIC mode as the original code did
not either.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Update the configuration after a resize to ensure that after a reboot
the added vCPUs are preserved.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This was causing issues when the kernel was trying to reset the
interrupt and making the reboot fail.
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
The tty mode remains raw mode when cloud-hypervisor is terminted by
SIGTERM or SIGINT. The terminal is unusable due to echoing is
disabled which is really annoying.
Signed-off-by: Qiu Wenbo <qiuwenbo@phytium.com.cn>
Some physical address bits may become reserved in page table when SME
is enabled on AMD platform. Guest will trigger a reserved bit
violation page fault in this case due to write these reserved bits to 1
in page table. We need reduce the reserved bits to get the right
physical address range.
Signed-off-by: Qiu Wenbo <qiuwenbo@phytium.com.cn>
The KVM_SET_GSI_ROUTING ioctl is very simple, it overrides the previous
routes configuration with the new ones being applied. This means the
caller, in this case cloud-hypervisor, needs to maintain the list of all
interrupts which needs to be active at all times. This allows to
correctly support multiple devices to be passed through the VM and being
functional at the same time.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
