linux

iv/linux

History

Kyung Min Park b85a0425d8 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 <kyung.min.park@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Message-Id: <20210105004909.42000-2-yang.zhong@intel.com>
Acked-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

2021-02-04 05:27:16 -05:00

alpha

local64.h: make <asm/local64.h> mandatory

2020-12-29 15:36:49 -08:00

arc

ARC: [hsdk]: Enable FPU_SAVE_RESTORE

2021-01-08 13:46:58 -08:00

arm

ARM: SoC fixes for v5.11

2021-01-08 14:13:54 -08:00

arm64

KVM/arm64 fixes for 5.11, take #3