[PATCH V3 0/4] KVM vPMU support for AMD CPUs

[Wei Huang <wei@redhat.com>]

Currently KVM only supports vPMU for Intel CPUs. This patchset enables
KVM vPMU support for AMD platform by creating a common PMU interface for
x86. By refractoring, PMU related MSR accesses from guest VMs are dispatched
to corresponding functions defined in arch specific files.

V3:
  * Rebase the code to the latest of KVM tree (queue branch);
  * Branch out the Intel specific code from pmu.c to pmu_intel.c, in order
    to reflect the change history more accurately;
  * Name the parameters/variables more consistently (use msr, idx, 
    pmc_idx) across files;
  * Fix issues (whitespaces, macro names, ...) based on Radim's V2 comments;
  * Fix the MSR_K7_PERFCTRn and MSR_K7_EVNTSELn access code (in patch 4);

V2:
  * Create a generic pmu.c file which is shared by Intel and AMD CPUs;
  * pmu.c code becomes part of kvm.ko module. Similarly pmu_intel.c and
    pmu_amd.c are linked to kvm-intel.ko and kvm-amd.ko respectively;
  * Re-define kvm_pmu_ops function pointers. Per Radim Krcmar's comments,
    a large portion of Intel vPMU code are now consolidated and moved to
    pmu.c;
  * Polish pmu_amd.c code to comply with new definition of kvm_pmu_ops;

V1:
  * Adopt the file layout suggested by Radim Krcmar
  * Link arch module with its specific PMU file

RFC:
  * Initial version for RFC

Wei Huang (4):
  KVM: x86/vPMU: Define kvm_pmu_ops to support vPMU function dispatch
  KVM: x86/vPMU: Create vPMU interface for VMX and SVM
  KVM: x86/vPMU: Implement AMD vPMU code for KVM
  KVM: x86/vPMU: Enable PMU handling for AMD PERFCTRn and EVNTSELn MSRs

 arch/x86/include/asm/kvm_host.h |  37 ++-
 arch/x86/kvm/Makefile           |   4 +-
 arch/x86/kvm/cpuid.c            |   3 +-
 arch/x86/kvm/pmu.c              | 557 +++++++++++-----------------------------
 arch/x86/kvm/pmu.h              |  98 +++++++
 arch/x86/kvm/pmu_amd.c          | 207 +++++++++++++++
 arch/x86/kvm/pmu_intel.c        | 359 ++++++++++++++++++++++++++
 arch/x86/kvm/svm.c              |   8 +
 arch/x86/kvm/vmx.c              |   8 +
 arch/x86/kvm/x86.c              |  47 ++--
 10 files changed, 891 insertions(+), 437 deletions(-)
 create mode 100644 arch/x86/kvm/pmu.h
 create mode 100644 arch/x86/kvm/pmu_amd.c
 create mode 100644 arch/x86/kvm/pmu_intel.c

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1.8.3.1