Maintaining processor resources during architectural events

A processor, comprising:

• an execution logic to support a virtual machine monitor (VMM) to provide an abstraction of one or more virtual machines (VMs) to a plurality of guests running on the one or more VMs, each of the plurality of guests to include an operating system (OS) and software, the VMM to provide access to each of the one or more VMs to a set of physical resources including processor resources, memory, and input/output (IO) devices,
• a translation lookaside buffer (TLB) having a plurality of page table entries (PTEs) to translate virtual addresses to physical addresses of memory pages, each PTE including:
• an address space identifier (ASID) to identify an address space associated with the PTE,
• a thread identifier (ID) to identify a thread associated with the PTE,
• a valid bit;
• and
• a current ASID register to store a current ASID that is to be updated to switch to a different address space,
• wherein the execution logic, in response to a context switch, is to either not invalidate any PTEs of the TLB or to selectively invalidate one or more PTEs of the TLB based on ASIDs of the PTEs and the current ASID stored in the current ASID register.