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A patch queued for Linux 7.1 adds support for advertising AVX-512 BMM (Bit Matrix Multiply) instructions to KVM guest VMs. AVX-512 BMM is a new ISA feature in AMD's upcoming Zen 6 processors, enabling bit matrix multiply and bit reversal operations. The KVM change is minimal — it only needs to expose the relevant CPUID feature bits to guests, with no additional intercept controls required. The patch has been queued into kvm-x86 and is expected to be submitted during the Linux 7.1 merge window later in April 2026.

Linux 7.1 To Expose AMD Zen 6's AVX-512 BMM For Guest VMs