** Information type changed from Proprietary to Public
** Also affects: ubuntu
Importance: Undecided
Status: New
** Description changed:
Description:
Accelerator Interface Architecture introduces new instructions (AiA).
ENQCMD in particular uses a per-thread MSR to retrieve the PASID that kernel
IOMMU code setup during a call to intel_svm_bind_mm(). If a fork were to
happen, these PASID's aren't migrate-able since the cr3 for the new process is
different.
we would need to make sure that the new process doesn't copy the context bits.
fpu__copy() needs to ensure we don't move over bits that are pre-thread and
requires special dup() to rebind a new PASID if required. For now keeping it
cleared will ensure a future call to enqcmd() will #GP if new PASID mappings
aren't established.
Target Kernel:TBD
- Target Release: 18.10
+ Target Release: 19.04
** Tags removed: intel-kernel-18.10
** Tags added: intel-kernel-19.04
** Information type changed from Public to Private
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1730784
Title:
[Feature][IOMMU]SIOV: XSAVES bits will need to be cleared during a
fork
To manage notifications about this bug go to:
https://bugs.launchpad.net/intel/+bug/1730784/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
