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[$] Direct host system calls from KVM
Friday July 29, 2022. 04:27 PM , from LWN.net
As a general rule, virtualization mechanisms are designed to provide strong
isolation between a host and the guest systems that it runs. The guests are not trusted, and their ability to access or influence anything outside of their virtual machines must be tightly controlled. So a patch series allowing guests to execute arbitrary system calls in the host context might be expected to be the cause of significantly elevated eyebrows across the net. Andrei Vagin has posted such a series with the expected results.
https://lwn.net/Articles/902585/
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