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>
