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.
V4:
* Change vPMU API function names to further clarify their functionality
* Small fix for switch statement index in EVNTSELn and PERFCTRn (patch 4)
* Add Tested-by and Reviewed-by
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 | 50 ++--
arch/x86/kvm/Makefile | 4 +-
arch/x86/kvm/cpuid.c | 3 +-
arch/x86/kvm/pmu.c | 557 +++++++++++-----------------------------
arch/x86/kvm/pmu.h | 99 +++++++
arch/x86/kvm/pmu_amd.c | 207 +++++++++++++++
arch/x86/kvm/pmu_intel.c | 360 ++++++++++++++++++++++++++
arch/x86/kvm/svm.c | 8 +
arch/x86/kvm/vmx.c | 8 +
arch/x86/kvm/x86.c | 76 ++----
10 files changed, 896 insertions(+), 476 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
--
1.8.3.1
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