linux-kernel - [PATCH 0/6] x86: KVM: Expose CPUID to guest for new Intel platform instructions

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Date:   Wed, 19 Oct 2022 16:47:28 +0800
From:   Jiaxi Chen <jiaxi.chen@...ux.intel.com>
To:     kvm@...r.kernel.org
Cc:     tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
        dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
        seanjc@...gle.com, pbonzini@...hat.com, ndesaulniers@...gle.com,
        alexandre.belloni@...tlin.com, peterz@...radead.org,
        jiaxi.chen@...ux.intel.com, jpoimboe@...nel.org,
        chang.seok.bae@...el.com, pawan.kumar.gupta@...ux.intel.com,
        babu.moger@....com, jmattson@...gle.com, sandipan.das@....com,
        tony.luck@...el.com, sathyanarayanan.kuppuswamy@...ux.intel.com,
        fenghua.yu@...el.com, keescook@...omium.org,
        jane.malalane@...rix.com, nathan@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH 0/6] x86: KVM: Expose CPUID to guest for new Intel platform instructions

Latest Intel platform Granite Rapids/Sierra Forest has introduced below
new instructions and CPUIDs:

 - CMPccXADD CPUID.(EAX=7,ECX=1):EAX[bit 7]
 - AMX-FP16 CPUID.(EAX=7,ECX=1):EAX[bit 21]
 - AVX-IFMA CPUID.(EAX=7,ECX=1):EAX[bit 23]
 - AVX-VNNI-INT8 CPUID.(EAX=7,ECX=1):EDX[bit 4]
 - AVX-NE-CONVERT CPUID.(EAX=7,ECX=1):EDX[bit 5]
 - PREFETCHITI CPUID.(EAX=7,ECX=1):EDX[bit 14]

Details can be found in recent Intel ISE (Instruction Set
Extensions)[1].

This series enables related CPUID bit in the kernel feature bits and
expose them to KVM guest OS.

[1] Intel ISE: https://cdrdv2.intel.com/v1/dl/getContent/671368

Chang S. Bae (1):
  x86: KVM: Enable AMX-FP16 CPUID and expose it to guest

Jiaxi Chen (5):
  x86: KVM: Enable CMPccXADD CPUID and expose it to guest
  x86: KVM: Enable AVX-IFMA CPUID and expose it to guest
  x86: KVM: Enable AVX-VNNI-INT8 CPUID and expose it to guest
  x86: KVM: Enable AVX-NE-CONVERT CPUID and expose it to guest
  x86: KVM: Enable PREFETCHIT0/1 CPUID and expose it to guest

 arch/x86/include/asm/cpufeature.h        |  7 +++++--
 arch/x86/include/asm/cpufeatures.h       | 10 +++++++++-
 arch/x86/include/asm/disabled-features.h |  3 ++-
 arch/x86/include/asm/required-features.h |  3 ++-
 arch/x86/kernel/cpu/common.c             |  1 +
 arch/x86/kvm/cpuid.c                     |  8 ++++++--
 arch/x86/kvm/reverse_cpuid.h             |  1 +
 7 files changed, 26 insertions(+), 7 deletions(-)


base-commit: e18d6152ff0f41b7f01f9817372022df04e0d354
-- 
2.27.0