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>
The logic wasn't quite right, as it wasn't detecting BAR reprogramming
when the upper part of the address was identical. For instance, a BAR
moved from 0x7fc0000000 to 0x7fd0000000 wasn't detected properly.
The logic has been updated and cleaned up to fix this issue, which was
observed when running Windows guests. This fixes the network hotplug
support as well.
Fixes#1797Fixes#1798
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
In order to avoid possible issues with Bionic Beaver (18.04) as it's
getting old, we move the CI container to Focal Fossa (20.04).
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>
With current serde_derive it is possible to #[derive(Serialize)] on
packed structures if they implement Copy. This allows the removal of the
manual equivalent code.
Signed-off-by: Rob Bradford <robert.bradford@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>
For now, memory layout on arm64 is sparse and is conflict with uefi.
Here, we do some rearrangement to let it compact and compatible with
uefi support.
Signed-off-by: Jianyong Wu <jianyong.wu@arm.com>
We now reply on the value from '/sys/kernel/mm/ksm/shared_pages' to
validate our "--memory mergeable=on|off" option. For `mergeable=on`,
we are expecting to see more 'shared_pages' reported by the kernel when
we start more VMs with this option. For `mergeable=off`, we are
expecting the 'shared_pages' value to be always 0, as we are assuming
the rest of the system (in our CI) is not using mergeable memory.
Fixes: #2138
Signed-off-by: Bo Chen <chen.bo@intel.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>
Simplify snapshot & restore code by using generics to specify helper
functions that take / make a Serialize / Deserialize struct
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Since using bzImage is now deprecated, let's update the SGX integration
test to rely on vmlinux instead.
Fixes#2476
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
This allows the return of errors which will be printed using the
existing code and removes panic()s
Fixes: #2342
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This allows the return of errors which will be printed using the
existing code and removes panic()s
Fixes: #2342
Signed-off-by: Rob Bradford <robert.bradford@intel.com>
Both changes aim to document the absence of the CPU hot-remove
functionality on Windows.
Closes#2457.
Signed-off-by: Anatol Belski <anbelski@linux.microsoft.com>
Update the Ubuntu Focal image used as the guest image. It's based on the
latest Focal image released on April 1st 2021, and customized to include
all the utilities we need. As usual, snapd and pollinate services have
been removed.
Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
