EPT (Extended Page Tables)
E653442
EPT (Extended Page Tables) is an Intel hardware-assisted memory virtualization technology that allows virtual machines to manage guest-physical to host-physical address translations more efficiently, reducing overhead and improving performance.
All labels observed (3)
| Label | Occurrences |
|---|---|
| EPT (Extended Page Tables) canonical | 1 |
| Extended Page Table | 1 |
| Extended Page Tables | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T7278732 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: EPT (Extended Page Tables) Context triple: [Intel VT-x, hasFeature, EPT (Extended Page Tables)]
-
A.
ECPT
ECPT is the commonly used abbreviation for the European Convention for the Prevention of Torture and Inhuman or Degrading Treatment or Punishment, a key Council of Europe treaty aimed at safeguarding individuals in detention.
-
B.
Intel VT-x
Intel VT-x is Intel's hardware-assisted virtualization technology that enables more efficient and secure running of multiple operating systems on x86 processors.
-
C.
Intel VT-x or AMD-V
Intel VT-x or AMD-V are hardware-assisted virtualization technologies built into modern Intel and AMD processors that enable efficient and secure running of virtual machines.
-
D.
XD bit (Execute Disable Bit)
XD bit (Execute Disable Bit) is a hardware-based security feature in modern processors that helps prevent certain types of malicious code execution by marking specific areas of memory as non-executable.
-
E.
MMU
MMU is a large public university in Manchester, England, known for its diverse academic programs and strong links with industry and the creative sectors.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: EPT (Extended Page Tables) Target entity description: EPT (Extended Page Tables) is an Intel hardware-assisted memory virtualization technology that allows virtual machines to manage guest-physical to host-physical address translations more efficiently, reducing overhead and improving performance.
-
A.
ECPT
ECPT is the commonly used abbreviation for the European Convention for the Prevention of Torture and Inhuman or Degrading Treatment or Punishment, a key Council of Europe treaty aimed at safeguarding individuals in detention.
-
B.
Intel VT-x
Intel VT-x is Intel's hardware-assisted virtualization technology that enables more efficient and secure running of multiple operating systems on x86 processors.
-
C.
Intel VT-x or AMD-V
Intel VT-x or AMD-V are hardware-assisted virtualization technologies built into modern Intel and AMD processors that enable efficient and secure running of virtual machines.
-
D.
XD bit (Execute Disable Bit)
XD bit (Execute Disable Bit) is a hardware-based security feature in modern processors that helps prevent certain types of malicious code execution by marking specific areas of memory as non-executable.
-
E.
MMU
MMU is a large public university in Manchester, England, known for its diverse academic programs and strong links with industry and the creative sectors.
- F. None of above. chosen
Statements (49)
| Predicate | Object |
|---|---|
| instanceOf |
hardware-assisted memory virtualization technology
ⓘ
second-level address translation mechanism ⓘ |
| allows |
guest OS to manage its own page tables
ⓘ
hypervisor to maintain separate EPT structures ⓘ |
| alsoKnownAs |
Extended Page Table
ⓘ
linked to:
EPT (Extended Page Tables)
Intel EPT ⓘ
linked to:
Intel VT-x
|
| benefits |
better scalability with many virtual machines
ⓘ
more efficient context switching between VMs ⓘ reduced VM exit frequency for memory operations ⓘ |
| category | virtualization technology ⓘ |
| configuredBy | hypervisor software ⓘ |
| developedBy |
Intel
ⓘ
linked to:
Intel Corporation
|
| documentedIn | Intel 64 and IA-32 Architectures Software Developer’s Manual ⓘ |
| enables | guest-physical to host-physical address translation ⓘ |
| fullName |
Extended Page Tables
ⓘ
linked to:
EPT (Extended Page Tables)
|
| granularity | page-level control of guest-physical memory mappings ⓘ |
| implementedAs | set of page tables managed by the hypervisor ⓘ |
| improves |
performance of memory-intensive workloads in VMs
ⓘ
virtual machine performance ⓘ |
| introducedBy |
Intel VT-x with EPT extensions
ⓘ
linked to:
Intel VT-x
|
| operatesAt | second level of address translation ⓘ |
| partOf | Intel VT-x ⓘ |
| purpose |
to accelerate memory virtualization
ⓘ
to reduce virtualization overhead for memory translations ⓘ |
| reduces | overhead of shadow page tables ⓘ |
| relatedTo |
AMD Nested Page Tables
ⓘ
AMD RVI ⓘ Intel VT-d ⓘ Intel VT-x ⓘ |
| replaces | shadow page tables in many hypervisor implementations ⓘ |
| requires |
BIOS or firmware support to enable VT-x and EPT
ⓘ
processor support for Intel VT-x ⓘ |
| scope | applies only when Intel VT-x is active ⓘ |
| securityConsideration |
can be used by hypervisors to enforce memory isolation between VMs
ⓘ
has been involved in some side-channel and EPT-based attack research ⓘ |
| supports | hardware-assisted paging for virtual machines ⓘ |
| supportsFeature |
execute permissions per page
ⓘ
execute-disable for pages ⓘ large pages ⓘ nested paging ⓘ read permissions per page ⓘ write permissions per page ⓘ |
| usedBy |
KVM hypervisor on Intel processors
ⓘ
Microsoft Hyper-V on Intel processors ⓘ
linked to:
Hyper-V
VMware ESXi on Intel processors ⓘ Xen hypervisor on Intel processors ⓘ
linked to:
Xen
|
| usedIn |
hypervisors
ⓘ
server virtualization platforms ⓘ virtual machine monitors ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: EPT (Extended Page Tables) Description of subject: EPT (Extended Page Tables) is an Intel hardware-assisted memory virtualization technology that allows virtual machines to manage guest-physical to host-physical address translations more efficiently, reducing overhead and improving performance.
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.
subject linked to:
EPT (Extended Page Tables)
linked to: EPT (Extended Page Tables)
subject linked to:
EPT (Extended Page Tables)
linked to: EPT (Extended Page Tables)