Add support for vm device_attr ioctls on aarch64 #334
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kylin-wangdi
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sameo,
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roypat
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Jul 25, 2025
ShadowCurse
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thanks github, that's helpful. @kylin-wangdi could you try manually rebasing this? :o |
Add support for HAS_DEVICE_ATTR and SET_DEVICE_ATTR vm ioctls on aarch64 to support configuring SMCCC filter. Signed-off-by: kylin-wangdi <[email protected]>
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done rebasing |
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Summary of the PR
Add support for
HAS_DEVICE_ATTRandSET_DEVICE_ATTRvm ioctls onaarch64, which were introduced in linux 6.4 to support configuring SMCCC
filter. SMCCC filter could be used to forward selected SMCs or HVCs to
userspace for handling. For example, to implement vCPU hotplug/hotunplug
on aarch64, it's required to forward PSCI calls to userspace for handling.
Requirements
Before submitting your PR, please make sure you addressed the following
requirements:
git commit -s), and the commit message has max 60 characters for thesummary and max 75 characters for each description line.
test.
Release" section of CHANGELOG.md (if no such section exists, please create one).
unsafecode is properly documented.