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arch: Add compatibility check for CPUID.0x7.0x1:EDX

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Register EDX of CPUID leaf 0x7 sub-leaf 0x1 (Structured Extended Feature
Enumeration Sub-leaf) is currently not checked, but it should be.

KVM supports several of the features enumerated by this value when they
are supported by the host, such as AVX-VNNI-INT8, AMX-COMPLEX, AVX10
and more.

The migration destination needs to support any such feature exposed to
the guest from the migration source.

Signed-off-by: Oliver Anderson <oliver.anderson@cyberus-technology.de>
On-behalf-of: SAP oliver.anderson@sap.com
This commit is contained in:
Oliver Anderson
2026-07-29 15:06:03 +02:00
committed by Rob Bradford
parent c22b42d2de
commit 193e99c23a
1 changed files with 6 additions and 0 deletions
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6
arch/src/x86_64/mod.rs
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@@ -457,6 +457,12 @@ impl CpuidFeatureEntry {
feature_reg: CpuidReg::ECX, feature_reg: CpuidReg::ECX,
compatible_check: CpuidCompatibleCheck::BitwiseSubset, compatible_check: CpuidCompatibleCheck::BitwiseSubset,
}, },
CpuidFeatureEntry {
function: 7,
index: 1,
feature_reg: CpuidReg::EDX,
compatible_check: CpuidCompatibleCheck::BitwiseSubset,
},
// Leaf 0x8000_0001, ECX/EDX, CPUID features bits // Leaf 0x8000_0001, ECX/EDX, CPUID features bits
CpuidFeatureEntry { CpuidFeatureEntry {
function: 0x8000_0001, function: 0x8000_0001,