This bug was fixed in the package linux - 4.15.0-70.79
---
linux (4.15.0-70.79) bionic; urgency=medium
* Ubuntu-5.0.0-33.35 introduces KVM regression with old Intel CPUs and Linux
guests (LP: #1851709)
- Revert "KVM: x86: Manually calculate reserved bits when loading
This bug was fixed in the package linux - 5.0.0-36.39
---
linux (5.0.0-36.39) disco; urgency=medium
* Ubuntu-5.0.0-33.35 introduces KVM regression with old Intel CPUs and Linux
guests (LP: #1851709)
- Revert "KVM: x86: Manually calculate reserved bits when loading PDPTRS"
Patch submitted to the list was tested on disco as well. It fixed the
problem and no new regressions were found compared to previous tests.
Cascardo.
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** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1851709
Title:
Ubuntu-5.0.0-33.35 introduces KVM
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => High
** Changed in: linux (Ubuntu Disco)
Status: In Progress => Fix Committed
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** Description changed:
+ [Impact]
+ On CPUs with no EPT support, or when disabling kvm-intel ept support by use
of ept=0 module parameter, users are not able to launch a linux VM.
+
+ [Test case]
+ # modprobe kvm-intel ept=0
+ # cat /sys/module/kvm_intel/parameters/ept
+ N
+ #
** Changed in: linux (Ubuntu Disco)
Importance: Undecided => High
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https://bugs.launchpad.net/bugs/1851709
Title:
Ubuntu-5.0.0-33.35 introduces KVM regression with old
** Changed in: linux (Ubuntu Bionic)
Assignee: (unassigned) => Thadeu Lima de Souza Cascardo (cascardo)
** Changed in: linux (Ubuntu Disco)
Assignee: (unassigned) => Thadeu Lima de Souza Cascardo (cascardo)
** Changed in: linux (Ubuntu)
Status: Confirmed => Invalid
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You
** Also affects: linux (Ubuntu Disco)
Importance: Undecided
Status: New
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
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https://lore.kernel.org/lkml/68d02406-b9cc-2fc1-848c-
5d272d9a3...@proxmox.com/ contains upstream discussion, with mention of
a backported fix for 4.14 and 4.19..
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https://lore.kernel.org/lkml/2019225423.29309-1-sean.j.christopher...@intel.com/
is the fix for 4.19
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https://bugs.launchpad.net/bugs/1851709
Title:
Ubuntu-5.0.0-33.35
Thanks Mr. Kernel Bot but I really do not think that this bug misses
logs :)
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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