Hmm, linux-kernel address is broken. Sorry about that. Just drop it when replying please. The patchset is mostly interesting to kvm developers anyway. On Sun, Oct 30, 2011 at 06:53:35PM +0200, Gleb Natapov wrote: > 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 > > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- Gleb. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
