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Subject[PATCH 0/9] KVM in-guest performance monitoring
Date
This patchset exposes an emulated version 2 architectural performance
monitoring unit to KVM guests. The PMU is emulated using perf_events,
so the host kernel can multiplex host-wide, host-user, and the
guest on available resources.

The patches should be applied on top of KVM patches from the patch series
"[PATCH v2 0/9] perf support for x86 guest/host-only bits" [1]

If you want to try running perf in a guest you need to apply the patch
below to qemu-kvm and use -cpu host on qemu command line. But DO NOT
TRY those patches without applying [2][3] to the host kernel first.
Don't tell me I didn't warn you!

[1] https://lkml.org/lkml/2011/10/5/153
[2] https://lkml.org/lkml/2011/10/18/390
[3] https://lkml.org/lkml/2011/10/23/163

Avi Kivity (8):
KVM: Expose kvm_lapic_local_deliver()
KVM: Expose a version 2 architectural PMU to a guests
KVM: Add generic RDPMC support
KVM: SVM: Intercept RDPMC
KVM: VMX: Intercept RDPMC
KVM: Expose the architectural performance monitoring CPUID leaf
KVM: x86 emulator: fix RDPMC privilege check
KVM: x86 emulator: implement RDPMC (0F 33)

Gleb Natapov (1):
perf: expose perf capability to other modules.

arch/x86/include/asm/kvm_emulate.h | 1 +
arch/x86/include/asm/kvm_host.h | 44 +++
arch/x86/include/asm/perf_event.h | 11 +
arch/x86/kernel/cpu/perf_event.c | 11 +
arch/x86/kernel/cpu/perf_event.h | 2 +
arch/x86/kernel/cpu/perf_event_intel.c | 3 +
arch/x86/kvm/Makefile | 2 +-
arch/x86/kvm/emulate.c | 13 +-
arch/x86/kvm/lapic.c | 2 +-
arch/x86/kvm/lapic.h | 1 +
arch/x86/kvm/pmu.c | 513 ++++++++++++++++++++++++++++++++
arch/x86/kvm/svm.c | 15 +
arch/x86/kvm/vmx.c | 15 +-
arch/x86/kvm/x86.c | 65 ++++-
include/linux/kvm_host.h | 1 +
15 files changed, 686 insertions(+), 13 deletions(-)
create mode 100644 arch/x86/kvm/pmu.c

diff --git a/target-i386/cpuid.c b/target-i386/cpuid.c
index f179999..ff2a0ca 100644
--- a/target-i386/cpuid.c
+++ b/target-i386/cpuid.c
@@ -1178,11 +1178,20 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
*edx = 0;
break;
case 0xA:
- /* Architectural Performance Monitoring Leaf */
- *eax = 0;
- *ebx = 0;
- *ecx = 0;
- *edx = 0;
+ if (kvm_enabled()) {
+ KVMState *s = env->kvm_state;
+
+ *eax = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EAX);
+ *ebx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EBX);
+ *ecx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_ECX);
+ *edx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EDX);
+ } else {
+ /* Architectural Performance Monitoring Leaf */
+ *eax = 0; //0x07280402;
+ *ebx = 0;
+ *ecx = 0;
+ *edx = 0; //0x00000503;
+ }
break;
case 0xD:
/* Processor Extended State */
--
1.7.5.3


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