On 16/05/18 09:37, John Wang wrote: > > Hi: > > 64 bit PV guest can attack hypervisor by SP3 >
Yes. > whether it still can attack others 64 bit PV guest by SP3? > Meltdown attacks only operate within a single address space. You can't attack a separate address space with it. That said, the VM => VM attack with Meltdown is due to the fact that other VMs are mapped into Xen's directmap, so available by attacking the hypervisor. ~Andrew
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