Bug 19064 - x86/cpu: Add CWF CPU models and related ISAs.
Summary: x86/cpu: Add CWF CPU models and related ISAs.
Status: NEW
Alias: None
Product: ANCK 5.10 Dev
Classification: ANCK
Component: X86 (show other bugs) X86
Version: unspecified
Hardware: All Linux
: P3-Medium S3-normal
Target Milestone: ---
Assignee: Guanjun
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Reported: 2025-02-26 19:10 UTC by quanxian
Modified: 2025-03-06 10:48 UTC (History)
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Description quanxian intel_group 2025-02-26 19:10:12 UTC 
Description of problem:
Add CWF CPU models and related ISAs.
CPU:
x86/cpu: Add model number for Intel Clearwater Forest processor
Server product based on the Atom Darkmont core.


ISAs:latest Intel platform Clearwater Forest has introduced new instructions
enumerated by CPUIDs of SHA512, SM3, SM4 and AVX-VNNI-INT16. Advertise
these CPUIDs to userspace so that guests can query them directly.

SHA512, SM3 and SM4 are on an expected-dense CPUID leaf and some other
bits on this leaf have kernel usages. Considering they have not truly
kernel usages, hide them in /proc/cpuinfo.

These new instructions only operate in xmm, ymm registers and have no new
VMX controls, so there is no additional host enabling required for guests
to use these instructions, i.e. advertising these CPUIDs to userspace is
safe.



Version-Release number of selected component (if applicable):


How reproducible:


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Additional info:
Comment 1 小龙 admin 2025-02-28 16:06:58 UTC 
The PR Link: https://gitee.com/anolis/cloud-kernel/pulls/4722
Comment 2 小龙 admin 2025-03-06 10:45:04 UTC 
The PR Link: https://gitee.com/anolis/intel-cloud-kernel/pulls/33
Comment 3 小龙 admin 2025-03-06 10:48:34 UTC 
The PR Link: https://gitee.com/anolis/cloud-kernel/pulls/4778