Thread

1. minimaltom · 1786038220 · focus · HN ↗

   Oh yay another one lol. This one seems much more general than the prior one that needed nested page tables.

   Patch Thursday for cloud VM ppl lol

   1. tryauuum · 1786045334 · focus · HN ↗

      Doesn't this one need it as well? I see the shadow mmu

      1. minimaltom · 1786047039 · focus · HN ↗

         Right, but what x86 KVM setup is there in practice that doesnt present a mmu to its guest and hence keep its own track (shadow) of memory mappings?

         1. Veserv · 1786052010 · focus · HN ↗

            Shadow memory mappings are only needed when you do not have hardware virtualization or when doing nested virtualization.

            From the page: "it can threaten the guest-host isolation of KVM/x86 hosts that accept untrusted guests and expose nested virtualization"

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