Davidlohr Bueso 88ac457c88 hw/cxl: Support type3 HDM-DB ...

Add basic plumbing for memory expander devices that support Back
Invalidation. This introduces a 'hdm-db=on|off' parameter and
exposes the relevant BI RT/Decoder component cachemem registers.

Some noteworthy properties:
 - Devices require enabling Flit mode across the CXL topology.
 - Explicit BI-ID commit is required.
 - HDM decoder support both host and dev coherency models.

Tested-by: Dongjoo Seo <dongjoo.seo1@samsung.com>
Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20260204170936.43959-7-Jonathan.Cameron@huawei.com>

2026-02-20 13:04:45 -05:00

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about

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devel

docs/devel: fix bash-ism warning for configure

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interop

docs/interop/firmware: Add 'uefi-vars' member for FirmwareMappingMemory

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specs

docs/specs/acpi_cpu_hotplug: Remove legacy cpu hotplug descriptions

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sphinx

scripts/kerneldoc: Switch to the Python kernel-doc script

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sphinx-static

treewide: remove unnessary "coding" header

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spin

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system

hw/cxl: Support type3 HDM-DB

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tools

qemu-img info: Add cache mode option

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user

linux-user: Drop deprecated -p option

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block-replication.txt

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conf.py

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glossary.rst

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igd-assign.txt

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image-fuzzer.txt

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index.rst

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memory-hotplug.txt

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meson.build

docs/interop: Add test to keep vhost-user.json sane

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multi-thread-compression.txt

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pci_expander_bridge.txt

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pcie_sriov.txt

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pcie.txt

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qcow2-cache.txt

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qdev-device-use.txt

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rdma.txt

docs tests: Fix use of migrate_set_parameter

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requirements.txt

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throttle.txt

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