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| author | Kyung Min Park <[email protected]> | 2021-01-05 00:49:08 +0000 |
|---|---|---|
| committer | Paolo Bonzini <[email protected]> | 2021-02-04 10:27:16 +0000 |
| commit | b85a0425d8056f3bd8d0a94ecdddf2a39d32a801 (patch) | |
| tree | 4d150e857b24b4700b293da0c444bbdbd8af49a2 /tools/testing/selftests/kvm/lib/perf_test_util.c | |
| parent | x86: kvm: style: Simplify bool comparison (diff) | |
| download | kernel-b85a0425d8056f3bd8d0a94ecdddf2a39d32a801.tar.gz kernel-b85a0425d8056f3bd8d0a94ecdddf2a39d32a801.zip | |
Enumerate AVX Vector Neural Network instructions
Add AVX version of the Vector Neural Network (VNNI) Instructions.
A processor supports AVX VNNI instructions if CPUID.0x07.0x1:EAX[4] is
present. The following instructions are available when this feature is
present.
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
The only in-kernel usage of this is kvm passthrough. The CPU feature
flag is shown as "avx_vnni" in /proc/cpuinfo.
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: Kyung Min Park <[email protected]>
Signed-off-by: Yang Zhong <[email protected]>
Reviewed-by: Tony Luck <[email protected]>
Message-Id: <[email protected]>
Acked-by: Borislav Petkov <[email protected]>
Signed-off-by: Paolo Bonzini <[email protected]>
Diffstat (limited to 'tools/testing/selftests/kvm/lib/perf_test_util.c')
0 files changed, 0 insertions, 0 deletions