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>
These fields allow you to expose the component part of an existing
buffer, such as a resource template as a new field which is required to
expose the memory CRS details.
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>
The current virtio-fs-dev branch from the official repo is breaking the
build on our Azure VMs because the glibc wrapper for renameat2() syscall
does not exist. This branch fixes the problem while the maintainers are
fixing the issue upstream.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
With the latest version of virtiofsd, some changes have been made
to the socket path parameter. This needs to be updated in the cloud
hypervisor codebase, so that our CI keeps running correctly.
Fixes#611
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The From and Display traits were not handling some of the enum
definitions. We no longer have a default case for Display so any future
misses will fail at build time.
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Everytime we use VFIO with cloud-hypervisor, we get the following error:
ERROR:vfio/src/vfio_device.rs:440 -- Could not get region #8 info
But this is not an error per se, and should be considered as a simple
warning.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The current code was always considering 0xffffffff being written to the
register as a sign it was expecting to get the size, hence the BAR
reprogramming detection was stating this case was not a reprogramming
case.
Problem is, if the value 0xffffffff is directed at a 64bits BAR, this
might be the high or low part of a 64bits address which is meant to be
the new address of the BAR, which means we would miss the detection of
the BAR being reprogrammed here.
This commit improves the code using finer granularity checks in order to
detect this corner case correctly.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The expansion ROM BAR reprogramming was being triggered for the wrong
reason and was causing the following error to be reported:
ERROR:pci/src/bus.rs:207 -- Failed moving device BAR: failed allocating
new 32 bits MMIO range
Following the PCI specification, here is what is defined:
Device independent configuration software can determine how much address
space the device requires by writing a value of all 1's to the address
portion of the register and then reading the value back.
This means we cannot expect 0xffffffff to be written, as the address
portion corresponds to the bits 31-11. That's why whenever the size of
this special BAR is being asked for, the value being written is
0xfffff800.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The way the code is currently implemented, only by writing to STDIN a
user can trigger some input to reach the VM through virtio-console. But
in case, there were not enough virtio descriptors to process what was
retrieved from STDIN, the remaining bits would be transferred only if
STDIN was triggered again. The missing part is that when some
descriptors are made available from the guest, the virtio-console device
should try to send any possible remaining bits.
By triggering the function process_input_queue() whenever the guest
notifies the host that some new descriptors are ready for the receive
queue, this patch allows to fill the implementation void that was left.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In case the virtio descriptor is pulled out of the Queue iterator, it
is important to fill it and tag it as used. This is already done from
the successful code path, but in case there's an error during the
filling, we should make sure to put the descriptor back in the list of
available descriptors. This way, when the error occurs, we don't loose
a descriptor, and it could be used later.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
The existing code was a bit too complex and it was introducing a bug
when trying to paste long lines directly to the console. By simplifying
the code, and by doing proper usage of the drain() function, the bug is
fixed by this commit.
Here is the similar output one could have gotten from time to time, when
pasting important amounts of bytes:
ERROR:vm-virtio/src/console.rs:104 -- Failed to write slice:
InvalidGuestAddress(GuestAddress(1040617472))
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
