KVM: Expose AVX_VNNI instruction to guset

mainline inclusion
from mainline-v5.12-rc1
commit 1085a6b5
category: feature
feature: SPR New Instructions Virtualization
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5O6WB
CVE: N/A
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/


commit/?id=1085a6b5

Intel-SIG: commit 1085a6b5 ("KVM: Expose AVX_VNNI instruction to guset")

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KVM: Expose AVX_VNNI instruction to guset

Expose AVX (VEX-encoded) versions of the Vector Neural Network
Instructions to guest.

The bit definition:
CPUID.(EAX=7,ECX=1):EAX[bit 4] AVX_VNNI

The following instructions are available when this feature is
present in the guest.
  1. VPDPBUS: Multiply and Add Unsigned and Signed Bytes
  2. VPDPBUSDS: Multiply and Add Unsigned and Signed Bytes with Saturation
  3. VPDPWSSD: Multiply and Add Signed Word Integers
  4. VPDPWSSDS: Multiply and Add Signed Integers with Saturation

This instruction is currently documented in the latest "extensions"
manual (ISE). It will appear in the "main" manual (SDM) in the future.

Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Message-Id: <20210105004909.42000-3-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Aichun Shi <aichun.shi@intel.com>