[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v1 00/13] x86/PMU: Xen PMU PV support
The following patch series adds PMU support in Xen for PV guests. There is a companion patchset for Linux kernel. In addition, another set of changes will be provided (later) for userland perf code. This version has following limitations: * For accurate profiling of dom0/Xen dom0 VCPUs should be pinned. * Hypervisor code is only profiled on processors that have running dom0 VCPUs on them. * No backtrace support. * Will fail to load under XSM: we ran out of bits in permissions vector and this needs to be fixed separately A few notes that may help reviewing: * A shared data structure (xenpmu_data_t) between each PV VPCU and hypervisor CPU is used for passing registers' values as well as PMU state at the time of PMU interrupt. * PMU interrupts are taken by hypervisor at NMI level for both HVM and PV. * Guest's interrupt handler does not read/write PMU MSRs directly. Instead, it accesses xenpmu_data_t and flushes it to HW it before returning. * PMU mode is controlled at runtime via /sys/hypervisor/pmu/pmu/{pmu_mode,pmu_flags} in addition to 'vpmu' boot option (which is preserved for back compatibility). The following modes are provided: * disable: VPMU is off * enable: VPMU is on. Guests can profile themselves, dom0 profiles itself and Xen * priv_enable: dom0 only profiling. dom0 collects samples for everyone. Sampling in guests is suspended. * /proc/xen/xensyms file exports hypervisor's symbols to dom0 (similar to /proc/kallsyms) * VPMU infrastructure is now used for both HVM and PV and therefore has been moved up from hvm subtree Boris Ostrovsky (13): Export hypervisor symbols Set VCPU's is_running flag closer to when the VCPU is dispatched x86/PMU: Stop AMD counters when called from vpmu_save_force() x86/VPMU: Minor VPMU cleanup intel/VPMU: Clean up Intel VPMU code x86/PMU: Add public xenpmu.h x86/PMU: Make vpmu not HVM-specific x86/PMU: Interface for setting PMU mode and flags x86/PMU: Initialize PMU for PV guests x86/PMU: Add support for PMU registes handling on PV guests x86/PMU: Handle PMU interrupts for PV guests x86/PMU: Save VPMU state for PV guests during context switch x86/PMU: Move vpmu files up from hvm directory xen/arch/x86/Makefile | 9 +- xen/arch/x86/apic.c | 13 - xen/arch/x86/domain.c | 18 +- xen/arch/x86/hvm/Makefile | 1 - xen/arch/x86/hvm/svm/Makefile | 1 - xen/arch/x86/hvm/svm/entry.S | 2 + xen/arch/x86/hvm/svm/vpmu.c | 494 ------------- xen/arch/x86/hvm/vmx/Makefile | 1 - xen/arch/x86/hvm/vmx/entry.S | 1 + xen/arch/x86/hvm/vmx/vmcs.c | 59 ++ xen/arch/x86/hvm/vmx/vpmu_core2.c | 894 ----------------------- xen/arch/x86/hvm/vpmu.c | 266 ------- xen/arch/x86/oprofile/op_model_ppro.c | 3 +- xen/arch/x86/platform_hypercall.c | 14 + xen/arch/x86/traps.c | 38 +- xen/arch/x86/vpmu.c | 545 ++++++++++++++ xen/arch/x86/vpmu_amd.c | 486 +++++++++++++ xen/arch/x86/vpmu_intel.c | 938 +++++++++++++++++++++++++ xen/arch/x86/x86_64/asm-offsets.c | 1 + xen/arch/x86/x86_64/compat/entry.S | 4 + xen/arch/x86/x86_64/entry.S | 4 + xen/arch/x86/x86_64/platform_hypercall.c | 2 +- xen/common/event_channel.c | 1 + xen/common/schedule.c | 10 +- xen/common/symbols-dummy.c | 1 + xen/common/symbols.c | 78 +- xen/include/asm-x86/domain.h | 3 + xen/include/asm-x86/hvm/vcpu.h | 3 - xen/include/asm-x86/hvm/vmx/vmcs.h | 3 +- xen/include/asm-x86/hvm/vmx/vpmu_core2.h | 51 -- xen/include/asm-x86/hvm/vpmu.h | 104 --- xen/include/asm-x86/irq.h | 1 - xen/include/asm-x86/mach-default/irq_vectors.h | 1 - xen/include/asm-x86/vpmu.h | 97 +++ xen/include/public/platform.h | 21 + xen/include/public/xen.h | 2 + xen/include/public/xenpmu.h | 138 ++++ xen/include/xen/hypercall.h | 4 + xen/include/xen/softirq.h | 1 + xen/include/xen/symbols.h | 4 + xen/tools/symbols.c | 4 + 41 files changed, 2465 insertions(+), 1856 deletions(-) delete mode 100644 xen/arch/x86/hvm/svm/vpmu.c delete mode 100644 xen/arch/x86/hvm/vmx/vpmu_core2.c delete mode 100644 xen/arch/x86/hvm/vpmu.c create mode 100644 xen/arch/x86/vpmu.c create mode 100644 xen/arch/x86/vpmu_amd.c create mode 100644 xen/arch/x86/vpmu_intel.c delete mode 100644 xen/include/asm-x86/hvm/vmx/vpmu_core2.h delete mode 100644 xen/include/asm-x86/hvm/vpmu.h create mode 100644 xen/include/asm-x86/vpmu.h create mode 100644 xen/include/public/xenpmu.h -- 1.8.1.4 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
|
Lists.xenproject.org is hosted with RackSpace, monitoring our |