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i386: Add new CPU model SapphireRapids

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The new CPU model mostly inherits features from Icelake-Server, while
adding new features:
 - AMX (Advance Matrix eXtensions)
 - Bus Lock Debug Exception
and new instructions:
 - AVX VNNI (Vector Neural Network Instruction):
    - VPDPBUS: Multiply and Add Unsigned and Signed Bytes
    - VPDPBUSDS: Multiply and Add Unsigned and Signed Bytes with Saturation
    - VPDPWSSD: Multiply and Add Signed Word Integers
    - VPDPWSSDS: Multiply and Add Signed Integers with Saturation
 - FP16: Replicates existing AVX512 computational SP (FP32) instructions
   using FP16 instead of FP32 for ~2X performance gain
 - SERIALIZE: Provide software with a simple way to force the processor to
   complete all modifications, faster, allowed in all privilege levels and
   not causing an unconditional VM exit
 - TSX Suspend Load Address Tracking: Allows programmers to choose which
   memory accesses do not need to be tracked in the TSX read set
 - AVX512_BF16: Vector Neural Network Instructions supporting BFLOAT16
   inputs and conversion instructions from IEEE single precision
 - fast zero-length MOVSB (KVM doesn't support yet)
 - fast short STOSB (KVM doesn't support yet)
 - fast short CMPSB, SCASB (KVM doesn't support yet)

Features that may be added in future versions:
 - CET (virtualization support hasn't been merged)

Signed-off-by: Wang, Lei <lei4.wang@intel.com>
Reviewed-by: Robert Hoo <robert.hu@linux.intel.com>
Message-Id: <20220812055751.14553-1-lei4.wang@intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Wang, Lei 2022-08-11 22:57:51 -07:00 • committed by Paolo Bonzini
parent 3023c9b4d1
commit 7eb061b06e
2 changed files with 135 additions and 2 deletions
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4
target/i386/cpu.h
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@ -881,10 +881,14 @@ uint64_t x86_cpu_get_supported_feature_word(FeatureWord w,
#define CPUID_7_0_EDX_TSX_LDTRK (1U << 16)
/* Architectural LBRs */
#define CPUID_7_0_EDX_ARCH_LBR (1U << 19)
/* AMX_BF16 instruction */
#define CPUID_7_0_EDX_AMX_BF16 (1U << 22)
/* AVX512_FP16 instruction */
#define CPUID_7_0_EDX_AVX512_FP16 (1U << 23)
/* AMX tile (two-dimensional register) */
#define CPUID_7_0_EDX_AMX_TILE (1U << 24)
/* AMX_INT8 instruction */
#define CPUID_7_0_EDX_AMX_INT8 (1U << 25)
/* Speculation Control */
#define CPUID_7_0_EDX_SPEC_CTRL (1U << 26)
/* Single Thread Indirect Branch Predictors */