Re: [PATCH v5 3/3] i386: Add notify VM exit support

2022-09-12 Thread Chenyi Qiang
On 9/10/2022 12:25 AM, Peter Xu wrote: On Wed, Aug 17, 2022 at 10:08:45AM +0800, Chenyi Qiang wrote: There are cases that malicious virtual machine 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

Re: [PATCH v5 3/3] i386: Add notify VM exit support

2022-09-09 Thread Peter Xu
On Wed, Aug 17, 2022 at 10:08:45AM +0800, Chenyi Qiang wrote: > There are cases that malicious virtual machine 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

Re: [PATCH v5 3/3] i386: Add notify VM exit support

2022-09-04 Thread Chenyi Qiang
Hi Paolo, Any comment on patch 2-3? Thanks Chenyi On 8/17/2022 10:08 AM, Chenyi Qiang wrote: There are cases that malicious virtual machine 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

[PATCH v5 3/3] i386: Add notify VM exit support

2022-08-16 Thread Chenyi Qiang
There are cases that malicious virtual machine 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.