Bug 2008 - Backport Notify VM exit patches from Linux kernel
Summary: Backport Notify VM exit patches from Linux kernel
Status: NEW
Alias: None
Product: ANCK 5.10 Dev
Classification: ANCK
Component: virt (show other bugs) virt
Version: unspecified
Hardware: x86_64 Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: maqiao
QA Contact: shuming
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Reported: 2022-08-30 11:18 UTC by tristone
Modified: 2022-08-30 11:18 UTC (History)
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Description tristone intel_group 2022-08-30 11:18:52 UTC 
Description of problem:
There are cases that malicious virtual machines can cause CPU stuck (due
to event windows don't open up), e.g., infinite loop in microcode when
nested #AC (CVE-2015-5307). No event window means no event (NMI, SMI and
IRQ) can be delivered. It leads the CPU to be unavailable to host or
other VMs.

VMM can enable notify VM exit that a VM exit generated if no event
window occurs in VM non-root mode for a specified amount of time (notify
window).


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