sphinx.addnodesdocument)}( rawsource children]( translations
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h]h¥}hjL sbah }(h ]h ]h"]yenah$]h&]uh1hhhhKRhhhhubhsection)}(hhh](htitle)}(h+Compute Express Link Subsystem Maturity Maph]h+Compute Express Link Subsystem Maturity Map}(hjb hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj] hhhhhKubh paragraph)}(hX/ The Linux CXL subsystem tracks the dynamic `CXL specification
`_ that
continues to respond to new use cases with new features, capability
updates and fixes. At any given point some aspects of the subsystem are
more mature than others. While the periodic pull requests summarize the
`work being incorporated each merge window
`_,
those do not always convey progress relative to a starting point and a
future end goal.h](h+The Linux CXL subsystem tracks the dynamic }(hjr hhhNhNubh reference)}(hT`CXL specification
`_h]hCXL specification}(hj| hhhNhNubah }(h ]h ]h"]h$]h&]nameCXL specificationrefuri=https://computeexpresslink.org/cxl-specification-landing-pageuh1jz hjr ubhtarget)}(h@
h]h }(h ]cxl-specificationah ]h"]cxl specificationah$]h&]refurij uh1j
referencedKhjr ubh that
continues to respond to new use cases with new features, capability
updates and fixes. At any given point some aspects of the subsystem are
more mature than others. While the periodic pull requests summarize the
}(hjr hhhNhNubj{ )}(h}`work being incorporated each merge window
`_h]h)work being incorporated each merge window}(hj hhhNhNubah }(h ]h ]h"]h$]h&]name)work being incorporated each merge windowj Nhttps://lore.kernel.org/linux-cxl/?q=s%3APULL+s%3ACXL+tc%3Atorvalds+NOT+s%3AReuh1jz hjr ubj )}(hQ
h]h }(h ])work-being-incorporated-each-merge-windowah ]h"])work being incorporated each merge windowah$]h&]refurij uh1j j Khjr ubhY,
those do not always convey progress relative to a starting point and a
future end goal.}(hjr hhhNhNubeh }(h ]h ]h"]h$]h&]uh1jp hhhKhj] hhubjq )}(hWhat follows is a coarse breakdown of the subsystem's major
responsibilities along with a maturity score. The expectation is that
the change-history of this document provides an overview summary of the
subsystem maturation over time.h]hWhat follows is a coarse breakdown of the subsystem’s major
responsibilities along with a maturity score. The expectation is that
the change-history of this document provides an overview summary of the
subsystem maturation over time.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj] hhubjq )}(hThe maturity scores are:h]hThe maturity scores are:}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj] hhubh bullet_list)}(hhh](h list_item)}(h[3] Mature: Work in this area is complete and no changes on the horizon.
Note that this score can regress from one kernel release to the next
based on new test results or end user reports.
h]jq )}(h[3] Mature: Work in this area is complete and no changes on the horizon.
Note that this score can regress from one kernel release to the next
based on new test results or end user reports.h]h[3] Mature: Work in this area is complete and no changes on the horizon.
Note that this score can regress from one kernel release to the next
based on new test results or end user reports.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubj )}(h[2] Stabilizing: Major functionality operational, common cases are
mature, but known corner cases are still a work in progress.
h]jq )}(h[2] Stabilizing: Major functionality operational, common cases are
mature, but known corner cases are still a work in progress.h]h[2] Stabilizing: Major functionality operational, common cases are
mature, but known corner cases are still a work in progress.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK hj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubj )}(h[1] Initial: Capability that has exited the Proof of Concept phase, but
may still have significant gaps to close and fixes to apply as real
world testing occurs.
h]jq )}(h[1] Initial: Capability that has exited the Proof of Concept phase, but
may still have significant gaps to close and fixes to apply as real
world testing occurs.h]h[1] Initial: Capability that has exited the Proof of Concept phase, but
may still have significant gaps to close and fixes to apply as real
world testing occurs.}(hj! hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK hj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubj )}(hX [0] Known gap: Feature is on a medium to long term horizon to
implement. If the specification has a feature that does not even have
a '0' score in this document, there is a good chance that no one in
the linux-cxl@vger.kernel.org community has started to look at it.
h]jq )}(hX [0] Known gap: Feature is on a medium to long term horizon to
implement. If the specification has a feature that does not even have
a '0' score in this document, there is a good chance that no one in
the linux-cxl@vger.kernel.org community has started to look at it.h](h[0] Known gap: Feature is on a medium to long term horizon to
implement. If the specification has a feature that does not even have
a ‘0’ score in this document, there is a good chance that no one in
the }(hj9 hhhNhNubj{ )}(hlinux-cxl@vger.kernel.orgh]hlinux-cxl@vger.kernel.org}(hjA hhhNhNubah }(h ]h ]h"]h$]h&]refuri mailto:linux-cxl@vger.kernel.orguh1jz hj9 ubh% community has started to look at it.}(hj9 hhhNhNubeh }(h ]h ]h"]h$]h&]uh1jp hhhK$hj5 ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubj )}(hEX: Out of scope for kernel enabling, or kernel enabling not required
h]jq )}(hDX: Out of scope for kernel enabling, or kernel enabling not requiredh]hDX: Out of scope for kernel enabling, or kernel enabling not required}(hje hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK)hja ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubeh }(h ]h ]h"]h$]h&]bullet-uh1j hhhKhj] hhubj\ )}(hhh](ja )}(hFeature and Capabilitiesh]hFeature and Capabilities}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj hhhhhK,ubj\ )}(hhh](ja )}(hEnumeration / Provisioningh]hEnumeration / Provisioning}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj hhhhhK/ubjq )}(hAll of the fundamental enumeration an object model of the subsystem is
in place, but there are several corner cases that are pending closure.h]hAll of the fundamental enumeration an object model of the subsystem is
in place, but there are several corner cases that are pending closure.}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK0hj hhubj )}(hhh](j )}(h[2] CXL Window Enumeration
* [2] :ref:`Extended-linear memory-side cache `
* [0] Low Memory-hole
* [X] Hetero-interleave
h](jq )}(h[2] CXL Window Enumerationh]h[2] CXL Window Enumeration}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK4hj ubj )}(hhh](j )}(h>[2] :ref:`Extended-linear memory-side cache `h]jq )}(hj h](h[2] }(hj hhhNhNubh)}(h::ref:`Extended-linear memory-side cache `h]hinline)}(hj h]h!Extended-linear memory-side cache}(hj hhhNhNubah }(h ]h ](xrefstdstd-refeh"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]refdocdriver-api/cxl/maturity-map refdomainj reftyperef refexplicitrefwarn reftargetextended-linearuh1hhhhK6hj ubeh }(h ]h ]h"]h$]h&]uh1jp hhhK6hj ubah }(h ]h ]h"]h$]h&]uh1j hj ubj )}(h[0] Low Memory-holeh]jq )}(hj h]h[0] Low Memory-hole}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK7hj ubah }(h ]h ]h"]h$]h&]uh1j hj ubj )}(h[X] Hetero-interleave
h]jq )}(h[X] Hetero-interleaveh]h[X] Hetero-interleave}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK8hj ubah }(h ]h ]h"]h$]h&]uh1j hj ubeh }(h ]h ]h"]h$]h&]j *uh1j hhhK6hj ubeh }(h ]h ]h"]h$]h&]uh1j hj hhhNhNubj )}(hJ[2] Switch Enumeration
* [0] CXL register enumeration link-up dependency
h](jq )}(h[2] Switch Enumerationh]h[2] Switch Enumeration}(hjE hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK:hjA ubj )}(hhh]j )}(h0[0] CXL register enumeration link-up dependency
h]jq )}(h/[0] CXL register enumeration link-up dependencyh]h/[0] CXL register enumeration link-up dependency}(hjZ hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhjz ubj )}(hhh]j )}(h/[0] Decoder target and granularity constraints
h]jq )}(h.[0] Decoder target and granularity constraintsh]h.[0] Decoder target and granularity constraints}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK@hj ubah }(h ]h ]h"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]j j: uh1j hhhK@hjz ubeh }(h ]h ]h"]h$]h&]uh1j hj hhhNhNubj )}(h[2] Performance enumeration
* [3] Endpoint CDAT
* [3] Switch CDAT
* [1] CDAT to Core-mm integration
* [1] x86
* [0] Arm64
* [0] All other arch.
* [0] Shared link
h](jq )}(h[2] Performance enumerationh]h[2] Performance enumeration}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKBhj ubj )}(hhh](j )}(h[3] Endpoint CDATh]jq )}(hj h]h[3] Endpoint CDAT}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKDhj ubah }(h ]h ]h"]h$]h&]uh1j hj ubj )}(h[3] Switch CDATh]jq )}(hj h]h[3] Switch CDAT}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKEhj ubah }(h ]h ]h"]h$]h&]uh1j hj ubj )}(hM[1] CDAT to Core-mm integration
* [1] x86
* [0] Arm64
* [0] All other arch.
h](jq )}(h [1] CDAT to Core-mm integrationh]h [1] CDAT to Core-mm integration}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKFhj ubj )}(hhh](j )}(h[1] x86h]jq )}(hj
h]h[1] x86}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKHhj ubah }(h ]h ]h"]h$]h&]uh1j hj ubj )}(h [0] Arm64h]jq )}(hj$ h]h [0] Arm64}(hj& hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKIhj" ubah }(h ]h ]h"]h$]h&]uh1j hj ubj )}(h[0] All other arch.
h]jq )}(h[0] All other arch.h]h[0] All other arch.}(hj= hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKJhj9 ubah }(h ]h ]h"]h$]h&]uh1j hj ubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhKHhj ubeh }(h ]h ]h"]h$]h&]uh1j hj ubj )}(h[0] Shared link
h]jq )}(h[0] Shared linkh]h[0] Shared link}(hja hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKLhj] ubah }(h ]h ]h"]h$]h&]uh1j hj ubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhKDhj ubeh }(h ]h ]h"]h$]h&]uh1j hj hhhNhNubj )}(hO[2] Hotplug
(see CXL Window Enumeration)
* [0] Handle Soft Reserved conflicts
h](jq )}(h([2] Hotplug
(see CXL Window Enumeration)h]h([2] Hotplug
(see CXL Window Enumeration)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKNhj ubj )}(hhh]j )}(h#[0] Handle Soft Reserved conflicts
h]jq )}(h"[0] Handle Soft Reserved conflictsh]h"[0] Handle Soft Reserved conflicts}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKQhj ubah }(h ]h ]h"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]j j: uh1j hhhKQhj ubeh }(h ]h ]h"]h$]h&]uh1j hj hhhNhNubj )}(h,[0] :ref:`RCH link status `h]jq )}(hj h](h[0] }(hj hhhNhNubh)}(h(:ref:`RCH link status `h]j )}(hj h]hRCH link status}(hj hhhNhNubah }(h ]h ](j stdstd-refeh"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]refdocj refdomainj reftyperef refexplicitrefwarnj rch-link-statusuh1hhhhKShj ubeh }(h ]h ]h"]h$]h&]uh1jp hhhKShj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubj )}(h [0] Fabrics / G-FAM (chapter 7)h]jq )}(hj h]h [0] Fabrics / G-FAM (chapter 7)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKThj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubj )}(h [0] Global Access Endpoint
h]jq )}(h[0] Global Access Endpointh]h[0] Global Access Endpoint}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKUhj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhK4hj hhubeh }(h ]enumeration-provisioningah ]h"]enumeration / provisioningah$]h&]uh1j[ hj hhhhhK/ubj\ )}(hhh](ja )}(hRASh]hRAS}(hj1 hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj. hhhhhKYubjq )}(hIn many ways CXL can be seen as a standardization of what would normally
be handled by custom EDAC drivers. The open development here is
mainly caused by the enumeration corner cases above.h]hIn many ways CXL can be seen as a standardization of what would normally
be handled by custom EDAC drivers. The open development here is
mainly caused by the enumeration corner cases above.}(hj? hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKZhj. hhubj )}(hhh](j )}(h[3] Component events (OS)h]jq )}(hjR h]h[3] Component events (OS)}(hjT hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK^hjP ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h[2] Component events (FFM)h]jq )}(hji h]h[2] Component events (FFM)}(hjk hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK_hjg ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h![1] Endpoint protocol errors (OS)h]jq )}(hj h]h![1] Endpoint protocol errors (OS)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK`hj~ ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h"[1] Endpoint protocol errors (FFM)h]jq )}(hj h]h"[1] Endpoint protocol errors (FFM)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKahj ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h [0] Switch protocol errors (OS)h]jq )}(hj h]h [0] Switch protocol errors (OS)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKbhj ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h [1] Switch protocol errors (FFM)h]jq )}(hj h]h [1] Switch protocol errors (FFM)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKchj ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(hf[2] DPA->HPA Address translation
* [1] XOR Interleave translation
(see CXL Window Enumeration)
h](jq )}(h [2] DPA->HPA Address translationh]h [2] DPA->HPA Address translation}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKdhj ubh block_quote)}(h@* [1] XOR Interleave translation
(see CXL Window Enumeration)
h]j )}(hhh]j )}(h<[1] XOR Interleave translation
(see CXL Window Enumeration)
h]jq )}(h;[1] XOR Interleave translation
(see CXL Window Enumeration)h]h;[1] XOR Interleave translation
(see CXL Window Enumeration)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKfhj ubah }(h ]h ]h"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]j j: uh1j hhhKfhj ubah }(h ]h ]h"]h$]h&]uh1j hhhKfhj ubeh }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h [1] Memory Failure coordinationh]jq )}(hj!
h]h [1] Memory Failure coordination}(hj#
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKihj
ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h[0] Scrub controlh]jq )}(hj8
h]h[0] Scrub control}(hj:
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKjhj6
ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(hB[2] ACPI error injection EINJ
* [0] EINJ v2
* [X] Compliance DOE
h](jq )}(h [2] ACPI error injection EINJh]h [2] ACPI error injection EINJ}(hjQ
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKkhjM
ubj )}(hhh](j )}(h [0] EINJ v2h]jq )}(hjd
h]h [0] EINJ v2}(hjf
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKmhjb
ubah }(h ]h ]h"]h$]h&]uh1j hj_
ubj )}(h[X] Compliance DOE
h]jq )}(h[X] Compliance DOEh]h[X] Compliance DOE}(hj}
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKnhjy
ubah }(h ]h ]h"]h$]h&]uh1j hj_
ubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhKmhjM
ubeh }(h ]h ]h"]h$]h&]uh1j hjM hhhNhNubj )}(h[2] Native error injectionh]jq )}(hj
h]h[2] Native error injection}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKphj
ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h[3] RCH error handlingh]jq )}(hj
h]h[3] RCH error handling}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKqhj
ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h[1] VH error handlingh]jq )}(hj
h]h[1] VH error handling}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKrhj
ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h[0] PPRh]jq )}(hj
h]h[0] PPR}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKshj
ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h [0] Sparingh]jq )}(hj
h]h [0] Sparing}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKthj
ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubj )}(h[0] Device built in test
h]jq )}(h[0] Device built in testh]h[0] Device built in test}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKuhj ubah }(h ]h ]h"]h$]h&]uh1j hjM hhhhhNubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhK^hj. hhubeh }(h ]rasah ]h"]rasah$]h&]uh1j[ hj hhhhhKYubj\ )}(hhh](ja )}(hMailbox commandsh]hMailbox commands}(hj9 hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj6 hhhhhKyubj )}(hhh](j )}(h[3] Firmware updateh]jq )}(hjL h]h[3] Firmware update}(hjN hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK{hjJ ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h[3] Health / Alertsh]jq )}(hjc h]h[3] Health / Alerts}(hje hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK|hja ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h4[1] :ref:`Background commands `h]jq )}(hjz h](h[1] }(hj| hhhNhNubh)}(h0:ref:`Background commands `h]j )}(hj h]hBackground commands}(hj hhhNhNubah }(h ]h ](j stdstd-refeh"]h$]h&]uh1j hj ubah }(h ]h ]h"]h$]h&]refdocj refdomainj reftyperef refexplicitrefwarnj background-commandsuh1hhhhK}hj| ubeh }(h ]h ]h"]h$]h&]uh1jp hhhK}hjx ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h[3] Sanitizationh]jq )}(hj h]h[3] Sanitization}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhK~hj ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h[3] Security commandsh]jq )}(hj h]h[3] Security commands}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h![3] RAW Command Debug Passthroughh]jq )}(hj h]h![3] RAW Command Debug Passthrough}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h#[0] CEL-only-validation Passthroughh]jq )}(hj h]h#[0] CEL-only-validation Passthrough}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h[0] Switch CCIh]jq )}(hj
h]h[0] Switch CCI}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h
[3] Timestamph]jq )}(hj$ h]h
[3] Timestamp}(hj& hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj" ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h[1] PMEM labelsh]jq )}(hj; h]h[1] PMEM labels}(hj= hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj9 ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h [3] PMEM GPF / Dirty Shutdownh]jq )}(hjR h]h [3] PMEM GPF / Dirty Shutdown}(hjT hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhjP ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubj )}(h[0] Scan Media
h]jq )}(h[0] Scan Mediah]h[0] Scan Media}(hjk hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhjg ubah }(h ]h ]h"]h$]h&]uh1j hjG hhhhhNubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhK{hj6 hhubeh }(h ]mailbox-commandsah ]h"]mailbox commandsah$]h&]uh1j[ hj hhhhhKyubj\ )}(hhh](ja )}(hPMUh]hPMU}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj hhhhhKubj )}(hhh](j )}(h[1] Type 3 PMUh]jq )}(hj h]h[1] Type 3 PMU}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubj )}(h [0] Switch USP/ DSP, Root Port
h]jq )}(h [0] Switch USP/ DSP, Root Porth]h [0] Switch USP/ DSP, Root Port}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhKhj hhubeh }(h ]pmuah ]h"]pmuah$]h&]uh1j[ hj hhhhhKubj\ )}(hhh](ja )}(hSecurityh]hSecurity}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj hhhhhKubj )}(hhh](j )}(h=[X] CXL Trusted Execution Environment Security Protocol (TSP)h]jq )}(hj h]h=[X] CXL Trusted Execution Environment Security Protocol (TSP)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubj )}(h [X] CXL IDE (subsumed by TSP)
h]jq )}(h [X] CXL IDE (subsumed by TSP)h]h [X] CXL IDE (subsumed by TSP)}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj
ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhKhj hhubeh }(h ]securityah ]h"]securityah$]h&]uh1j[ hj hhhhhKubj\ )}(hhh](ja )}(hMemory-poolingh]hMemory-pooling}(hj2
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj/
hhhhhKubj )}(hhh](j )}(h$[1] Hotplug of LDs (via PCI hotplug)h]jq )}(hjE
h]h$[1] Hotplug of LDs (via PCI hotplug)}(hjG
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhjC
ubah }(h ]h ]h"]h$]h&]uh1j hj@
hhhhhNubj )}(h*[0] Dynamic Capacity Device (DCD) Support
h]jq )}(h)[0] Dynamic Capacity Device (DCD) Supporth]h)[0] Dynamic Capacity Device (DCD) Support}(hj^
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhjZ
ubah }(h ]h ]h"]h$]h&]uh1j hj@
hhhhhNubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhKhj/
hhubeh }(h ]memory-poolingah ]h"]memory-poolingah$]h&]uh1j[ hj hhhhhKubj\ )}(hhh](ja )}(hMulti-host sharingh]hMulti-host sharing}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj
hhhhhKubj )}(hhh](j )}(h#[0] Hardware coherent shared memoryh]jq )}(hj
h]h#[0] Hardware coherent shared memory}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj
ubah }(h ]h ]h"]h$]h&]uh1j hj
hhhhhNubj )}(h-[0] Software managed coherency shared memory
h]jq )}(h,[0] Software managed coherency shared memoryh]h,[0] Software managed coherency shared memory}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj
ubah }(h ]h ]h"]h$]h&]uh1j hj
hhhhhNubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhKhj
hhubeh }(h ]multi-host-sharingah ]h"]multi-host sharingah$]h&]uh1j[ hj hhhhhKubj\ )}(hhh](ja )}(hMulti-host memoryh]hMulti-host memory}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj
hhhhhKubj )}(hhh](j )}(h#[0] Dynamic Capacity Device Supporth]jq )}(hj
h]h#[0] Dynamic Capacity Device Support}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj
ubah }(h ]h ]h"]h$]h&]uh1j hj
hhhhhNubj )}(h [0] Sharing
h]jq )}(h [0] Sharingh]h [0] Sharing}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj
ubah }(h ]h ]h"]h$]h&]uh1j hj
hhhhhNubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhKhj
hhubeh }(h ]multi-host-memoryah ]h"]multi-host memoryah$]h&]uh1j[ hj hhhhhKubj\ )}(hhh](ja )}(h Acceleratorh]h Accelerator}(hj% hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj" hhhhhKubj )}(hhh](j )}(h=[0] Accelerator memory enumeration HDM-D (CXL 1.1/2.0 Type-2)h]jq )}(hj8 h]h=[0] Accelerator memory enumeration HDM-D (CXL 1.1/2.0 Type-2)}(hj: hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj6 ubah }(h ]h ]h"]h$]h&]uh1j hj3 hhhhhNubj )}(h:[0] Accelerator memory enumeration HDM-DB (CXL 3.0 Type-2)h]jq )}(hjO h]h:[0] Accelerator memory enumeration HDM-DB (CXL 3.0 Type-2)}(hjQ hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhjM ubah }(h ]h ]h"]h$]h&]uh1j hj3 hhhhhNubj )}(h[0] CXL.cache 68b (CXL 2.0)h]jq )}(hjf h]h[0] CXL.cache 68b (CXL 2.0)}(hjh hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhjd ubah }(h ]h ]h"]h$]h&]uh1j hj3 hhhhhNubj )}(h'[0] CXL.cache 256b Cache IDs (CXL 3.0)
h]jq )}(h&[0] CXL.cache 256b Cache IDs (CXL 3.0)h]h&[0] CXL.cache 256b Cache IDs (CXL 3.0)}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj{ ubah }(h ]h ]h"]h$]h&]uh1j hj3 hhhhhNubeh }(h ]h ]h"]h$]h&]j j: uh1j hhhKhj" hhubeh }(h ] acceleratorah ]h"] acceleratorah$]h&]uh1j[ hj hhhhhKubj\ )}(hhh](ja )}(hUser Flow Supporth]hUser Flow Support}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj hhhhhKubj )}(hhh]j )}(h+[2] Inject & clear poison by region offset
h]jq )}(h*[2] Inject & clear poison by region offseth]h*[2] Inject & clear poison by region offset}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1jp hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubah }(h ]h ]h"]h$]h&]j j: uh1j hhhKhj hhubeh }(h ]user-flow-supportah ]h"]user flow supportah$]h&]uh1j[ hj hhhhhKubeh }(h ]feature-and-capabilitiesah ]h"]feature and capabilitiesah$]h&]uh1j[ hj] hhhhhK,ubj\ )}(hhh](ja )}(hDetailsh]hDetails}(hj hhhNhNubah }(h ]h ]h"]h$]h&]uh1j` hj hhhhhKubj )}(h.. _extended-linear:h]h }(h ]h ]h"]h$]h&]refidextended-linearuh1j hM hj hhhhubj )}(hhh]j )}(hX3 **Extended-linear memory-side cache**: An HMAT proposal to enumerate the presence of a
memory-side cache where the cache capacity extends the SRAT address
range capacity. `See the ECN
`_
for more details:
h]jq )}(hX2 **Extended-linear memory-side cache**: An HMAT proposal to enumerate the presence of a
memory-side cache where the cache capacity extends the SRAT address
range capacity. `See the ECN
`_
for more details:h](hstrong)}(h%**Extended-linear memory-side cache**h]h!Extended-linear memory-side cache}(hj
hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hj ubh: An HMAT proposal to enumerate the presence of a
memory-side cache where the cache capacity extends the SRAT address
range capacity. }(hj hhhNhNubj{ )}(hu`See the ECN
`_h]h See the ECN}(hj hhhNhNubah }(h ]h ]h"]h$]h&]name See the ECNj dhttps://lore.kernel.org/linux-cxl/6650e4f835a0e_195e294a8@dwillia2-mobl3.amr.corp.intel.com.notmuch/uh1jz hj ubj )}(hg
h]h }(h ] see-the-ecnah ]h"] see the ecnah$]h&]refurij/ uh1j j Khj ubh
for more details:}(hj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1jp hhhKhj ubah }(h ]h ]h"]h$]h&]uh1j hj hhhhhNubah }(h ]j ah ]h"]extended-linearah$]h&]j j: uh1j hhhKhj hhexpect_referenced_by_name}jQ j sexpect_referenced_by_id}j j subj )}(h.. _rch-link-status:h]h }(h ]h ]h"]h$]h&]j rch-link-statusuh1j hMhj hhhhubj )}(hhh]j )}(h**RCH Link Status**: RCH (Restricted CXL Host) topologies, end up
hiding some standard registers like PCIe Link Status / Capabilities in
the CXL RCRB (Root Complex Register Block).
h]jq )}(h**RCH Link Status**: RCH (Restricted CXL Host) topologies, end up
hiding some standard registers like PCIe Link Status / Capabilities in
the CXL RCRB (Root Complex Register Block).h](j )}(h**RCH Link Status**h]hRCH Link Status}(hjn hhhNhNubah }(h ]h ]h"]h$]h&]uh1j hjj ubh: RCH (Restricted CXL Host) topologies, end up
hiding some standard registers like PCIe Link Status / Capabilities in
the CXL RCRB (Root Complex Register Block).}(hjj hhhNhNubeh }(h ]h ]h"]h$]h&]uh1jp hhhKhjf ubah }(h ]h ]h"]h$]h&]uh1j hjc hhhhhNubah }(h ]jb ah ]h"]rch-link-statusah$]h&]j j: uh1j hhhKhj hhjT }j jX sjV }jb jX subj )}(h.. _background-commands:h]h }(h ]h ]h"]h$]h&]j background-commandsuh1j hMhj hhhhubj )}(hhh]j )}(hXc **Background commands**: The CXL background command mechanism is
awkward as the single slot is monopolized potentially indefinitely by
various commands. A `cancel on conflict
`_
facility is needed to make sure the kernel can ensure forward progress
of priority commands.h]jq )}(hXc **Background commands**: The CXL background command mechanism is
awkward as the single slot is monopolized potentially indefinitely by
various commands. A `cancel on conflict
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