linux-kernel - [PATCH v2 0/3] Use static_call for kvm_x86

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Message-Id: <cover.1610680941.git.jbaron@akamai.com>
Date:   Thu, 14 Jan 2021 22:27:53 -0500
From:   Jason Baron <jbaron@...mai.com>
To:     pbonzini@...hat.com, seanjc@...gle.com
Cc:     kvm@...r.kernel.org, x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/3] Use static_call for kvm_x86_ops

Hi,

Convert kvm_x86_ops to use static_call. Shows good performance
gains for cpuid loop micro-benchmark (results in patch 3/3).

Thanks,

-Jason


Changes from v1:
-Introduce kvm-x86-ops header with eye towards using this to define
 svm_x86_ops and vmx_x86_ops in follow on patches (Paolo, Sean)
-add new patch (1/3), that adds a vmx/svm prefix to help facilitate
 svm_x86_ops and vmx_x86_ops future conversions.
-added amd perf numbres to description of patch 3/3

Jason Baron (3):
  KVM: X86: append vmx/svm prefix to additional kvm_x86_ops functions
  KVM: x86: introduce definitions to support static calls for kvm_x86_ops
  KVM: x86: use static calls to reduce kvm_x86_ops overhead

 arch/x86/include/asm/kvm-x86-ops.h | 127 +++++++++++++++
 arch/x86/include/asm/kvm_host.h    |  21 ++-
 arch/x86/kvm/cpuid.c               |   2 +-
 arch/x86/kvm/hyperv.c              |   4 +-
 arch/x86/kvm/irq.c                 |   3 +-
 arch/x86/kvm/kvm_cache_regs.h      |  10 +-
 arch/x86/kvm/lapic.c               |  30 ++--
 arch/x86/kvm/mmu.h                 |   6 +-
 arch/x86/kvm/mmu/mmu.c             |  15 +-
 arch/x86/kvm/mmu/spte.c            |   2 +-
 arch/x86/kvm/pmu.c                 |   2 +-
 arch/x86/kvm/svm/svm.c             |  20 +--
 arch/x86/kvm/trace.h               |   4 +-
 arch/x86/kvm/vmx/nested.c          |   2 +-
 arch/x86/kvm/vmx/vmx.c             |  30 ++--
 arch/x86/kvm/vmx/vmx.h             |   2 +-
 arch/x86/kvm/x86.c                 | 307 +++++++++++++++++++------------------
 arch/x86/kvm/x86.h                 |   6 +-
 18 files changed, 369 insertions(+), 224 deletions(-)
 create mode 100644 arch/x86/include/asm/kvm-x86-ops.h

-- 
2.7.4