KVM SnowRidge Split-lock disable
Bug #1782209 reported by
Paul Lai
This bug affects 1 person
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Incomplete
|
Wishlist
|
Unassigned | ||
qemu (Ubuntu) |
New
|
Wishlist
|
Unassigned |
Bug Description
When bit 29 is set in Test Control MSR register 0x33, a #AC execption
is generated for split locked accesses at all CPL irrespective of
CR0.AM or EFLAGS.AC.
This feature can help developers to capture memory accesses that across cachelines with #LOCK assertion. Then developers can reconstruct their program accordingly
Upstream target linux 5.3
Target Release: 19.10
affects: | xen (Ubuntu) → kvm (Ubuntu) |
description: | updated |
tags: |
added: intel-virt-19.04 removed: intel |
description: | updated |
description: | updated |
tags: |
added: intel-virt-19.10 removed: intel-virt-19.04 |
Changed in linux (Ubuntu): | |
importance: | Undecided → Wishlist |
Changed in qemu (Ubuntu): | |
importance: | Undecided → Wishlist |
description: | updated |
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Hi,
title says KVM, but the bug is only against xen so far.
Will this need an "qemu (ubuntu)" and/or "linux (ubuntu)" task as well?
- kernel 4.20 is listed so I assume the latter.
- Comments do not yet mention Qemu