Commit Graph

852 Commits

Author SHA1 Message Date
Rob Bradford
bb2e7bb942 vmm: Shutdown vCPU threads
As part of the cleanup of the VM shutdown all the vCPU threads. This is
achieved by toggling a shared atomic boolean variable which is checked
in the vCPU loop. To trigger the vCPU code to look at this boolean it is
necessary to send a signal to the vCPU which will interrupt the running
KVM_RUN ioctl.

Fixes: #229

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
8308e1bf25 vmm, tests: Disable reboot support
Being able to reboot requires us to identify all the resources we are
leaking and cleaning those up before we can enable reboot. For now if
the user requests a reboot then shutdown instead.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
ad128bf72d vmm: Give vCPU and signal handler thread useful names
Sadly only the first few characters of the thread name is preserved so
use a shorter name for the vCPU thread for now. Also give the signal
handling thread a name.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
614eb68f16 vm: Make triple-fault and i8042 reset reboot the VM
Now we have ACPI shutdown we should reboot on these reset triggers.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
5a187ee2c2 x86_64/devices: acpi: Add support for ACPI shutdown & reboot
Add an I/O port "device" to handle requests from the kernel to shutdown
or trigger a reboot, borrowing an I/O used for ACPI on the Q35 platform.
The details of this I/O port are included in the FADT
(SLEEP_STATUS_REG/SLEEP_CONTROL_REG/RESET_REG) with the details of the
value to write in the FADT for reset (RESET_VALUE) and in the DSDT for
shutdown (S5 -> 0x05)

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
ae66a44d26 vmm: Support both reset and shutdown
Add a 2nd EventFd to the VM to control resetting (rebooting) the VM this
supplements the EventFd used for managing shutdown of the VM.

The default behaviour on i8042 or triple-fault based reset is currently
unchanged i.e. it will trigger a shutdown.

In order to support restarting the VM it was necessary to make start()
function take a reference to the config.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
2610f4353d arch: acpi: Only add ACPI COM1 device if serial is turned on
Only add the ACPI PNP device for the COM1 serial port if it is not
turned off with "--serial off"

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Rob Bradford
451502b50b vm: If a VCPU thread errors out then exit the hypervisor
Currently when the VCPU thread exits on an error the VMM continues to
run with no way of shutting down the main thread.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-09-03 19:18:49 +02:00
Sebastien Boeuf
b7d3ad9063 vm-virtio: fs: Factorize vhost-user setup
This patch factorizes the existing virtio-fs code by relying onto the
common code part of the vhost_user module in the vm-virtio crate.

In details, it factorizes the vhost-user setup, and reuses the error
types defined by the module instead of defining its own types.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-31 17:33:17 +01:00
Sebastien Boeuf
56cad00f2e vm-virtio: Move fs.rs to vhost_user module
vhost-user-net introduced a new module vhost_user inside the vm-virtio
crate. Because virtio-fs is actually vhost-user-fs, it belongs to this
new module and needs to be moved there.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-31 17:33:17 +01:00
Cathy Zhang
584a2cccee vmm: Add vhost-user-net support
Update vm configuration and device initial process to add
vhost-user-net support.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2019-08-30 15:00:26 +01:00
Cathy Zhang
51306555e7 vmm: Add hugetlbfs handling support
The currently directory handling process to open tempfile by
OpenOptions with custom_flags(O_TMPFILE) is workable for tmp
filesystem, but not workable for hugetlbfs, add new directory
handling process which works fine for both tmpfs and hugetlbfs.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2019-08-30 15:00:26 +01:00
Sebastien Boeuf
0b8856d148 vmm: Add RwLock to the GuestMemoryMmap
Following the refactoring of the code allowing multiple threads to
access the same instance of the guest memory, this patch goes one step
further by adding RwLock to it. This anticipates the future need for
being able to modify the content of the guest memory at runtime.

The reasons for adding regions to an existing guest memory could be:
- Add virtio-pmem and virtio-fs regions after the guest memory was
  created.
- Support future hotplug of devices, memory, or anything that would
  require more memory at runtime.

Because most of the time, the lock will be taken as read only, using
RwLock instead of Mutex is the right approach.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-22 08:24:15 +01:00
Sebastien Boeuf
ec0b5567c8 vmm: Share the guest memory instead of cloning it
The VMM guest memory was cloned (copied) everywhere the code needed to
have ownership of it. In order to clean the code, and in anticipation
for future support of modifying this guest memory instance at runtime,
it is important that every part of the code share the same instance.

Because VirtioDevice implementations need to have access to it from
different threads, that's why Arc must be used in this case.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-22 08:24:15 +01:00
Sebastien Boeuf
658c076eb2 linters: Fix clippy issues
Latest clippy version complains about our existing code for the
following reasons:

- trait objects without an explicit `dyn` are deprecated
- `...` range patterns are deprecated
- lint `clippy::const_static_lifetime` has been renamed to
  `clippy::redundant_static_lifetimes`
- unnecessary `unsafe` block
- unneeded return statement

All these issues have been fixed through this patch, and rustfmt has
been run to cleanup potential formatting errors due to those changes.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-15 09:10:04 -07:00
Samuel Ortiz
c52e276a5c vmm: Log debug ioport timestamps
We timestamp the VM creation time, and log the elapsed time between that
instant and the debug ioport events.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-08-15 16:06:54 +02:00
Samuel Ortiz
48a9300667 vmm: Log 0x80 IO port writes
The 0x80 IO port is typically used for BIOS debugging and testing on
bare metal x86 platforms.
We use that port and its dedicated 16 debug codes to time and track the
guest boot process.

Fixes #63

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-08-15 16:06:54 +02:00
Sebastien Boeuf
3c29c47783 vmm: Create shared memory region for virtio-fs
When the cache_size parameter from virtio-fs device is not empty, the
VMM creates a dedicated memory region where the shared files will be
memory mapped by the virtio-fs device.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-13 13:57:53 +02:00
Sebastien Boeuf
74225ab5b3 config: Add option dax and cache_size to virtio-fs
In order to support the more performant version of virtio-fs, that is
the one relying on a shared memory region between host and guest, we
introduce two new parameters to the --fs device.

The "dax" parameter allows the user to choose if he wants to use the
shared memory region with virtio-fs. By default, this parameter is "on".

The "cache_size" parameter allows the user to specify the amount of
memory that should be shared between host and guest. By default, the
value of this parameter is 8Gib as advised by virtio-fs maintainers.

Note that dax=off and cache_size are incompatible.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-13 13:57:53 +02:00
fazlamehrab
df5058ec0a vm-virtio: Implement console size config feature
One of the features of the virtio console device is its size can be
configured and updated. Our first iteration of the console device
implementation is lack of this feature. As a result, it had a
default fixed size which could not be changed. This commit implements
the console config feature and lets us change the console size from
the vmm side.

During the activation of the device, vmm reads the current terminal
size, sets the console configuration accordinly, and lets the driver
know about this configuration by sending an interrupt. Later, if
someone changes the terminal size, the vmm detects the corresponding
event, updates the configuration, and sends interrupt as before. As a
result, the console device driver, in the guest, updates the console
size.

Signed-off-by: A K M Fazla Mehrab <fazla.mehrab.akm@intel.com>
2019-08-09 13:55:43 -07:00
Rob Bradford
d9a355f85a vmm: Add new "null" serial/console output mode
Poor performance was observed when booting kernels with "console=ttyS0"
and the serial port disabled.

This change introduces a "null" console output mode and makes it the
default for the serial console. In this case the serial port
is advertised as per other output modes but there is no input and any
output is dropped.

Fixes: #163

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-08-09 09:04:48 -07:00
Rob Bradford
f910476dd7 vmm: Only send stdin input to serial/console if it can handle it
Do not send the contents of stdin to the serial or console device if
they're not in tty mode.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-08-09 09:04:48 -07:00
Rob Bradford
9caad7394d build, misc: Bump vmm-sys-util dependency
The structure of the vmm-sys-util crate has changed with lots of code
moving to submodules.

This change adjusts the use of the imported structs to reference the
submodules.

Fixes: #145

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-08-02 07:42:20 -07:00
Sebastien Boeuf
1a484a82f9 vmm: Don't break from epoll loop on EINTR
The existing code taking care of the epoll loop was too restrictive as
it was propagating the error returned from the epoll_wait() syscall, no
matter what was the error. This causes the epoll loop to be broken,
leading to the VM termination.

This patch enforces the parsing of the returned error and prevent from
the error propagation in case it is EINTR, which stands for Interrupted.
In case the epoll loop is interrupted, it is appropriate to retry.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-02 08:37:34 +01:00
Sebastien Boeuf
532f6a96f3 vmm: Factorize VM related information into a structure
In order to fix the clippy error complaining about the number of
arguments passed to a function exceeding the maximum of 7 arguments,
this patch factorizes those parameters into a more global one called
VmInfo.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-02 08:35:16 +01:00
Sebastien Boeuf
c0756c429d vmm: Increase memory slot from virtio-pmem
Since virtio-pmem uses a KVM user memory region, it needs to increment
the slot index in use to prevent from any conflict with further VFIO
allocations (used for mapping mappable memory BARs).

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-08-02 08:35:16 +01:00
Samuel Ortiz
fa41ddd94f arch: Add a Reserved memory region to the memory hole
We add a Reserved region type at the end of the memory hole to prevent
32-bit devices allocations to overlap with architectural address ranges
like IOAPIC, TSS or APIC ones.

Eventually we should remove that reserved range by allocating all the
architectural ranges before letting 32-bit devices use the memory hole.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-07-25 11:45:38 +01:00
Samuel Ortiz
299d887856 arch: Add SubRegion memory type
We want to be able to differentiate between memory regions that must be
managed separately from the main address space (e.g. the 32-bit memory
hole) and ones that are reserved (i.e. from which we don't want to allow
the VMM to allocate address ranges.

We are going to use a reserved memory region for restricting the 32-bit
memory hole from expanding beyond the IOAPIC and TSS addresses.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-07-25 11:45:38 +01:00
Sebastien Boeuf
d92d797896 vfio: Update memory slot index to support multiple VFIO devices
In order to correctly support multiple VFIO devices, we need to
increment the memory slot index every time it is being used to set some
user memory region through KVM. That's why the mem_slot parameter is
made mutable.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-25 11:45:38 +01:00
Sebastien Boeuf
b9f677c46c vmm: Fix the memory slot index
The memory slot index provided to the DeviceManager was wrong since
only the RAM memory regions are set as user memory regions to KVM.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-25 11:45:38 +01:00
Sebastien Boeuf
b5eab43aa5 vfio: Create a global KVM VFIO device for all VFIO devices
KVM does not support multiple KVM VFIO devices to be created when
trying to support multiple VFIO devices. This commit creates one
global KVM VFIO device being shared with every VFIO device, which
makes possible the support for passing several devices through the
VM.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-25 11:45:38 +01:00
Samuel Ortiz
4d16ca8ae7 vmm: Support direct device assignment
With the VFIO crate, we can now support directly assigned PCI devices
into cloud-hypervisor guests.

We support assigning multiple host devices, through the --device command
line parameter. This parameter takes the host device sysfs path.

Fixes: #60

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-07-24 11:55:08 +02:00
Samuel Ortiz
4e48309660 vm: Factorize all virtio devices creation routines
Our DeviceManager::new() routine is reaching north of 250 lines.
For simplicity and readbility sake, extract all virtio devices creation
code into their own routines.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-07-23 08:41:37 +01:00
fazlamehrab
24438e0390 vm-virtio: Enable the vmm support for virtio-console
To use the implemented virtio console device, the users can select one
of the three options ("off", "tty" or "file=/path/to/the/file") with
the command line argument "--console". By default, the console is
enabled as a device named "hvc0" (option: tty). When "off" option is
used, the console device is not added to the VM configuration at all.

Signed-off-by: A K M Fazla Mehrab <fazla.mehrab.akm@intel.com>
2019-07-22 23:08:56 +01:00
Sebastien Boeuf
f98a69f42e vm-allocator: Introduce an MMIO hole address allocator
With this new AddressAllocator as part of the SystemAllocator, the
VMM can now decide with finer granularity where to place memory.

By allocating the RAM and the hole into the MMIO address space, we
ensure that no memory will be allocated by accident where the RAM or
where the hole is.
And by creating the new MMIO hole address space, we create a subset
of the entire MMIO address space where we can place 32 bits BARs for
example.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-22 09:51:16 -07:00
Samuel Ortiz
0a04a950a1 vm-allocator: Expand the IRQ allocation API to support GSI
GSI (Global System Interrupt) is an extension of just a linear array of
IRQs. It takes IOAPICs into account for example.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-07-22 09:51:16 -07:00
Chao Peng
96fb38a5aa vm-allocator: Align address at allocation time
There is alignment support for AddressAllocator but there are occations
that the alignment is known only when we call allocate(). One example
is PCI BAR which is natually aligned, means for which we have to align
the base address to its size.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
2019-07-22 09:51:16 -07:00
Chao Peng
af7cd74e04 vm-allocator: Make port IO non optional
This is only for allocating the port IO address range.
If a platform does not have PIO devices at all, the address
range will simply be unused.
So, simplify the vm-allocator data structure by making both
MMIO and PIO mandatory.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
2019-07-22 09:51:16 -07:00
Sebastien Boeuf
1268165040 pci: Allow for registering IO and Memory BAR
This patch adds the support for both IO and Memory BARs by expecting
the function allocate_bars() to identify the type of each BAR.
Based on the type, register_mapping() insert the address range on the
appropriate bus (PIO or MMIO).

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-22 09:50:10 -07:00
Rob Bradford
cb81f8be5b vmm: Make serial port controllable via command line
Add a "--serial" command line that takes as input either "off", "tty"
(default and current behaviour) and "file=/path/to/file".

When "--serial off" is used the serial device is not added to the VM
configuration at all.

Integration tests added that check for interrupts present (or not) and
that when sending to a file the file contains the expected serial
output.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-07-11 12:17:58 +01:00
Samuel Ortiz
7ed073805d config: Fix default memory size parameter
We need to give it a suffix.

Fixes: #96

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-07-10 08:35:10 +02:00
Sebastien Boeuf
d9ce29117e vmm: Flag --disk should be optional
Now that cloud-hypervisor VMM supports virtio-pmem, it can directly
boot a VM from an image exposed as a persistent memory block device.

That's why there is no need to force the --disk option as being
mandatory.

Fixes #90

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-09 21:58:02 +02:00
Sebastien Boeuf
f0a76ad424 vmm: Add support for multiple virtio-net devices
Until now, the VMM was only accepting a single instance of virtio-net
device. This commit extends the virtio-net support by allowing several
devices to be created for a single VM.

Fixes #71

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-09 18:55:30 +01:00
Sebastien Boeuf
a2947f9a9f cli: Accept K,M,G suffixes for size parameters
For every parameter dealing with a size as option, such as memory or
virtio-pmem, the CLI can now parse sizes with the suffixes K, M or G.

Fixes #70

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-09 15:22:26 +01:00
Jing Liu
2bb0b22cc1 pci: Refine pci topology
PciConfigIo is a legacy pci bus dispatcher, which manages all pci
devices including a pci root bridge. However, it is unnecessary to
design a complex hierarchy which redirects every access by PciRoot.

Since pci root bridge is also a pci device instance, and only contains
easy config space read/write, and PciConfigIo actually acts as a pci bus
to dispatch resource based resolving when VMExit, we re-arrange to make
the pci hierarchy clean.

Signed-off-by: Jing Liu <jing2.liu@linux.intel.com>
2019-07-09 10:01:18 +02:00
Rob Bradford
49d6b495d5 vmm: Remove println! from debugging
Remove println! left over from virtio-fs development.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-07-02 13:50:50 +02:00
Sebastien Boeuf
34e09923a5 vmm: Add support for multiple virtio-pmem devices
Until now, the VMM was only accepting a single instance of virtio-pmem
device. This commit extend the virtio-pmem support by allowing several
devices to be created for a single VM.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-01 14:38:55 +01:00
Sebastien Boeuf
294c26bfb7 vmm: Add virtio-pmem support to cloud-hypervisor
This patch plumbs the virtio-pmem device to the VMM. By adding a new
command line option "--pmem", we can now expose some persistent memory
to the guest OS, backed by the provided source.

The point of having such support in cloud-hypervisor is to be able to
share some memory between the host and the guest as DAXable.
One interesting use case is to boot directly from an image passed
through virtio-pmem, instead of going through virtio-blk. This can
allow good performances while avoiding the guest cache, which would
prevent the VM memory footprint from growing too much.

Fixes #68

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-07-01 14:38:55 +01:00
Sebastien Boeuf
1cb2378499 vmm: Add support for multiple virtio-fs devices
Until now, the VMM was only accepting a single instance of a virtio-fs
device. This commit extend the virtio-fs support by allowing several
devices to be created for a single VM.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-27 21:46:00 +02:00
Sebastien Boeuf
53085c7ccc memory: Allow memory to be backed by a file
In the context of vhost-user, we need the guest RAM to be backed by
a file in order to be accessed by an external process. This patch
adds the new flag "file=" to the "--memory" option so that we can
specify from the command line if the memory needs to be backed, and
by which specific file.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-27 21:46:00 +02:00
Sebastien Boeuf
2ede30b6d3 vmm: Add virtio-fs support to the VMM
The user can now share some files and directories with the guest by
providing the corresponding vhost-user socket. The virtiofsd daemon
should be started by the user before to start the VM.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-27 21:46:00 +02:00
Jing Liu
30266a41be vm-memory usage: vm-memory latest codes rename MmapError to Error
Signed-off-by: Jing Liu <jing2.liu@linux.intel.com>
2019-06-26 08:33:46 -07:00
Jing Liu
9da2343cb7 device: Improvement for BusDevice trait and PciDevice trait
BusDevice includes two methods which are only for PCI devices, which should
be as members of PciDevice trait for a better clean high level APIs.

Signed-off-by: Jing Liu <jing2.liu@linux.intel.com>
2019-06-25 06:17:30 -07:00
Sebastien Boeuf
5e803ab18f vmm: Integrate userspace IOAPIC
The previous commit introduced a userspace implementation of an IOAPIC
and this commits aims to plumb it into the cloud-hypervisor VMM.

Here is the list of new things brought by this patch:
- Update the rust-vmm/kvm-ioctls dependency to benefit from latest
  patches including the support for split irqchip, and the vector
  being returned when a VM exit is caused by an EOI.
- Enable the split irqchip (which means no IOAPIC or PIC is emulated
  in kernel). This is done conditionally based on the support of the
  TSC_DEADLINE_TIMER from both KVM and the underlying CPU. The
  dependency on TSC_DEADLINE_TIMER is related to KVM which does not
  support creating the in kernel PIT if it has a split irqchip.
- Rely on callbacks to handle the following use cases:
  - in kernel IOAPIC + serial IRQ (pin based)
  - in kernel IOAPIC + virtio-pci MSI-X
  - in kernel IOAPIC + virtio-pci IRQ (pin based)
  - userspace IOAPIC + serial IRQ (pin based)
  - userspace IOAPIC + virtio-pci MSI-X
  - userspace IOAPIC + virtio-pci IRQ (pin based)

Fixes #13

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-21 10:09:34 +02:00
Sebastien Boeuf
c8c4a4d444 devices: Create Interrupt trait to abstract interrupt delivery
This commit anticipate the future need from having support for both
in kernel and userspace IOAPIC. The way to signal an interrupt from
the serial device will vary depending on the use case, but this should
be independent from the serial implementation itself.

That's why this patch provides a generic trait for the serial device
to call from, so that it can trigger interrupts independently from the
IOAPIC type chosen (in kernel vs userspace).

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-21 10:09:34 +02:00
Cathy Zhang
429b53a672 vmm: Add bzimage loader support
VMM may load different format kernel image to start guest, we currently
only have elf loader support, so add bzimage loader support in case
that VMM would like to load bzimage.

Signed-off-by: Cathy Zhang <cathy.zhang@intel.com>
2019-06-13 11:28:20 +01:00
Chao Peng
0f54429848 vmm: Move all the CPUID related code to CpuidPatch
As more CPUID handling and CpuidPatch common code being added, it's
reasonable to move all the common code to the same place and in the
future we may consider move it to individual file when neccesary.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
2019-06-13 07:06:44 +02:00
Chao Peng
a0f4376eb0 vmm: Set the APIC ID in the extended topology
KVM exposes CPUID 0BH when host supports that, but the APIC ID that KVM
provides is the host APIC ID so we need replace that with ours.

Without this Linux guest reports something like:
[Firmware Bug]: CPU1: APIC id mismatch. Firmware: 1 APIC: 21

Fixes #42

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
2019-06-13 07:06:44 +02:00
Sebastien Boeuf
0d0d19e223 vmm: Enable TSC_DEADLINE_TIMER allows for PIT emulation removal
As mentioned in the KVM documentation, TSC_DEADLINE_TIMER feature
needs some special checks to validate that it is supported as the
cpuid will always report it as disabled.

We need to use the KVM_CHECK_EXTENSION ioctl to request the value
of KVM_CAP_TSC_DEADLINE_TIMER. In case it is supported through
the local APIC emulation provided by the CREATE_IRQCHIP in KVM,
we have to set manually this feature by patching the cpuid.

Here quoted from the KVM documentation:
```
The TSC deadline timer feature (CPUID leaf 1, ecx[24]) is always
returned as false, since the feature depends on KVM_CREATE_IRQCHIP
for local APIC support. Instead it is reported via

  ioctl(KVM_CHECK_EXTENSION, KVM_CAP_TSC_DEADLINE_TIMER)

if that returns true and you use KVM_CREATE_IRQCHIP, or if you
emulate the feature in userspace, then you can enable the feature
for KVM_SET_CPUID2.
```
This patch implements the behavior described above, and this allows
the VMM to remove the emulated Programmable Interval Timer (PIT) when
the TSC_DEADLINE_TIMER feature can be enabled.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-10 09:11:47 -07:00
Sebastien Boeuf
24dbe7003a irq: Fix pin based interrupt for virtio-pci
When the KVM capability KVM_CAP_SIGNAL_MSI is not present, the VMM
falls back from MSI-X onto pin based interrupts. Unfortunately, this
was not working as expected because the VirtioPciDevice object was
always creating an MSI-X capability structure in the PCI configuration
space. This was causing the guest drivers to expect MSI-X interrupts
instead of the pin based generated ones.

This patch takes care of avoiding the creation of a dedicated MSI-X
capability structure when MSI is not supported by KVM.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-07 18:19:52 +01:00
Sebastien Boeuf
47a4065aaf interrupt: Use a single closure to describe pin based and MSI-X
In order to factorize the complexity brought by closures, this commit
merges IrqClosure and MsixClosure into a generic InterruptDelivery one.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-06 15:27:35 +01:00
Sebastien Boeuf
8df05b72dc vmm: Add MSI-X support to virtio-pci devices
In order to allow virtio-pci devices to use MSI-X messages instead
of legacy pin based interrupts, this patch implements the MSI-X
support for cloud-hypervisor. The VMM code and virtio-pci bits have
been modified based on the "msix" module previously added to the pci
crate.

Fixes #12

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-06 15:27:35 +01:00
Sebastien Boeuf
13a065d2cd dep: Rely on latest kvm-ioctls crate
In order to have access to the newly added signal_msi() function
from the kvm-ioctls crate, this commit updates the version of the
kvm-ioctls to the latest one.

Because set_user_memory_region() has been swtiched to "unsafe", we
also need to handle this small change in our cloud-hypervisor code
directly.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-06 15:27:35 +01:00
Sebastien Boeuf
d3c7b45542 interrupt: Make IRQ delivery generic
Because we cannot always assume the irq fd will be the way to send
an IRQ to the guest, this means we cannot make the assumption that
every virtio device implementation should expect an EventFd to
trigger an IRQ.

This commit organizes the code related to virtio devices so that it
now expects a Rust closure instead of a known EventFd. This lets the
caller decide what should be done whenever a device needs to trigger
an interrupt to the guest.

The closure will allow for other type of interrupt mechanism such as
MSI to be implemented. From the device perspective, it could be a
pin based interrupt or an MSI, it does not matter since the device
will simply call into the provided callback, passing the appropriate
Queue as a reference. This design keeps the device model generic.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-06-06 15:27:35 +01:00
Rob Bradford
f63d4a7418 vm: Disable stdin and terminal reconfiguration when headless
When not running on a tty (tested with libc's isatty()) disable stdin
and do not reconfigure the terminal.

This is required to ensure that the VM responds correctly when running
in a headless environment such as Jenkins.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-06-06 11:03:13 +01:00
Rob Bradford
425841a4fe vm: Do not explictly exit on reset
Instead return from the control_loop() and calling function cleanly.
This is helpful for the testing framework as that means we can launch
multiple VMs in a row.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-06-06 11:03:13 +01:00
Sebastien Boeuf
e5e651895b config: Reorganize command line parsing
The command line parsing of the user input was not properly
abstracted from the vmm specific code. In the case of --net,
the parsing was done when the device manager was adding devices.

In order to fix this confusion, this patch introduces a new
module "config" dedicated to the translation of a VmParams
structure into a VmCfg structure. The former is built based
on the input provided by the user, while the latter is the
result of the parsing of every options.

VmCfg is meant to be consumed by the vmm specific code, and
it is also a fully public structure so that it can directly
be built from a testing environment.

Fixes #31

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-05-24 17:08:52 +01:00
Rob Bradford
a09f918adc main, vmm: Add support for multiple --disk options
Store the list of disks in a Vec<PathBuf> and then iterate over that
when creating the block devices.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
2019-05-22 17:46:59 +01:00
Samuel Ortiz
8bb71fad76 vmm: Simplify the vcpu run switch
Use a catchall case for all reasons that we do not handle, and
move the vCPU run switch into its own function.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-21 07:56:17 -07:00
Sebastien Boeuf
c1f1fe713f vm: Propagate errors appropriately
In order to get meaningful error messages, we want to make sure all
errors are passed up the call stack. This patch fixes this previous
limitation by separating errors related to the DeviceManager from
errors related to the Vm.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-05-14 05:34:35 +01:00
Chao Peng
6ecdd98634 virtio: Enable qcow support for virtio-block
With this enabled, one can pass a QCOW format disk
image with '--disk' switch.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
2019-05-13 22:08:29 +01:00
Samuel Ortiz
2c94529660 vmm: Propagate boot_kernel errors properly
So that our error traces are more meaningful.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-10 16:32:39 +02:00
Samuel Ortiz
83dadb818f vmm: Remove useless memory setting log
We don't really need to tell everyone where the host and guest memory
address is...

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-10 16:32:39 +02:00
Samuel Ortiz
3f38b42f05 vmm: Fix the Error enum comment
Our error handling is no longer only related to KVM ioctls.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-10 16:32:39 +02:00
Samuel Ortiz
cacce5f7c4 vmm: Use random local MAC address as the default one
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-10 16:32:39 +02:00
Sebastien Boeuf
5934f30fde vmm: Add support for letting the VMM create the TAP interface
Until now, the only way to get some networking with cloud-hypervisor
was to let the user create a TAP interface first, and then to provide
the name of this interface to the VMM.

This patch extend the previous behavior by adding the support for the
creation of a brand new TAP interface from the VMM itself. In case no
interface name is provided through "tap=<if_name>", we will assume
the user wants the VMM to create and set the interface on its behalf,
no matter the value of other parameters (ip, mask, and mac).
In this same scenario, because the user expects the VMM to create the
TAP interface, he can also provide the associated IP address and subnet
mask associated with it. In case those values are not provided, some
default ones will be picked.

No matter the value of "tap", the MAC address will always be set, and
if no value is provided, the VMM will come up with a default value for
it.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-05-10 16:32:39 +02:00
Chao Peng
8e7579b20e vm-virtio: Add virtio-rng implementation
Most of the code is taken from crosvm(bbd24c5) but is modified to
be adapted to the current VirtioDevice definition and epoll
implementation.

A new command option '--rng' is provided and it gives one the option
to override the entropy source which is /dev/urandom by default.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
2019-05-10 16:32:39 +02:00
Chao Peng
97865b605f vmm: Provide a common method to build a virtio PCI device
Since more virtio devices will be added and this code can be reused
for any type of virtio device.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
2019-05-10 16:32:39 +02:00
Sebastien Boeuf
c0be6642ad vmm: Leverage virtio-net to provide connectivity
This patch expand the device registration to add a new virtio-net
device in case the user provide the appropriate flag --net from the
command line.

If the flag is provided, the code will parse the TAP interface name
and the expected MAC address from the command line. The VM will be
connected to the provided TAP interface, and it will communicate the
MAC address to the virtio-net driver.

If the flag is not provided, the VM will not register any virtio-net
device, therefore it will not have any connectivity with the host.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-05-10 16:32:39 +02:00
Samuel Ortiz
040ea5432d cloud-hypervisor: Add proper licensing
Add the BSD and Apache license.
Make all crosvm references point to the BSD license.
Add the right copyrights and identifier to our VMM code.
Add Intel copyright to the vm-virtio and pci crates.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-09 15:44:17 +02:00
Samuel Ortiz
8f05773eae vmm: Fix build warning
Use the VM vcpus vector instead of creating a mutable one.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-09 15:44:17 +02:00
Sebastien Boeuf
5c9fc816de serial: Set terminal in raw mode
In order to have proper output from the serial, we need to setup the
terminal in raw mode. When the VM is shutting down, it is also the
VMM responsibility to set the terminal back into canonical mode if we
don't want to get any weird behavior from the shell.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-05-09 15:44:17 +02:00
Sebastien Boeuf
112418d928 main: Add kernel command line support
In order to let the user choose which kernel parameters to append, the
kernel boot parameters can be now specified from the command line.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-05-09 15:44:01 +02:00
Sebastien Boeuf
1270d09301 cloud-hypervisor: Add --disk option to provide VM rootfs
Based on the new virtio-blk support, this commit allows any user to
specify a --disk option in order to select the rootfs it wants to
use for the VM.

For now it assumes the partition 3 /dev/vd3 is the one where we can
find the rootfs.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-05-08 08:55:09 +02:00
Sebastien Boeuf
b67e0b3dad vmm: Use virtio-blk to support booting from disk image
After the virtio-blk device support has been introduced in the
previous commit, the vmm need to rely on this new device to boot
from disk images instead of initrd built into the kernel.

In order to achieve the proper support of virtio-blk, this commit
had to handle a few things:

  - Register an ioevent fd for each virtqueue. This important to be
    notified from the virtio driver that something has been written
    on the queue.

  - Fix the retrieval of 64bits BAR address. This is needed to provide
    the right address which need to be registered as the notification
    address from the virtio driver.

  - Fix the write_bar and read_bar functions. They were both assuming
    to be provided with an address, from which they were trying to
    find the associated offset. But the reality is that the offset is
    directly provided by the Bus layer.

  - Register a new virtio-blk device as a virtio-pci device from the
    vm.rs code. When the VM is started, it expects a block device to
    be created, using this block device as the VM rootfs.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-05-08 08:55:09 +02:00
Chao Peng
2a539ab176 vmm: Expose Hypervisor CPUID bit
This is required at least for kvm-clock.

Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
2019-05-08 08:55:06 +02:00
Samuel Ortiz
0adc3481df vmm: Add PCI root
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-08 08:55:06 +02:00
Sebastien Boeuf
342bdc3619 devices: Add support for i8042 reset device
Introduce emulation of i8042 device to allow the guest to stop the
VM by issuing a reset event.

The device has been copied over from the Crosvm code base, relying on
the commit 0268e26e1ac9e09aa51d733482c5df139cd8d588.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-05-08 08:55:00 +02:00
Sebastien Boeuf
29b90a8aee vmm: Create and handle an exit event
An exit event is required to be created and handled for the purpose
of letting the guest kernel stop the VM.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-05-08 08:40:42 +02:00
Sebastien Boeuf
afbf824a48 vmm: Handle stdin from a generic epoll loop
Instead of handling stdin in its own separate loop, we use a generic
one that can be reused for other events handling.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
2019-05-08 08:40:42 +02:00
Samuel Ortiz
a7bdf5ee48 vmm: Register an irqfd for our serial device
And get console input working.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-08 08:40:42 +02:00
Samuel Ortiz
c6c5e10a04 vmm: Add a basic stdin loop
After starting all vCPUs, we loop for STDIN input.
We need a more scalable eventfd control loop, obviously.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-08 08:40:42 +02:00
Samuel Ortiz
0b6ec34505 vmm: Retry running a CPU when getting EAGAIN or EINTR from the run ioctl
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-08 08:40:42 +02:00
Samuel Ortiz
25f4063da6 cloud-hypervisor: Add the --memory option
You guessed it: To specify the amount of memory for the VM.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-08 08:40:42 +02:00
Samuel Ortiz
59b5e53c40 cloud-hypervisor: Add the --cpus option
You guessed it: To specify the number of vcpus.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-08 08:40:42 +02:00
Samuel Ortiz
1853b350ee cloud-hypervisor: Add devices crate
Based on the Firecracker devices crate from commit 9cdb5b2.

It is a trimmed down version compared to the Firecracker one, to remove
a bunch of pulled dependencies (logger, metrics, rate limiter, etc...).

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-08 08:40:42 +02:00
Samuel Ortiz
7e2d1aca2d vmm: Boot kernel
Our command line was not copied properly since we were not allocating
enough space for it.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-08 08:40:42 +02:00
Samuel Ortiz
044f664135 vmm: Set CPUID
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-08 08:40:42 +02:00
Samuel Ortiz
0921cfb8f8 vmm: Basic Vcpu implementation
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-08 08:40:38 +02:00
Samuel Ortiz
539367b58c cloud-hypervisor: Initial kernel booting implementation
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-07 18:49:51 +02:00
Samuel Ortiz
a0da3deb5e cloud-hypervisor: Call into the test_vm() routine
test_vm is a dummy VM workload, we use it to test our initial VMM
settings.

Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-07 16:06:21 +02:00
Samuel Ortiz
16f2bedbb7 cloud-hypervisor: Add a vmm crate
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2019-05-07 16:03:24 +02:00