This patchset enables PMU virtualization in KVM ARM64. The Guest can now directly use PMU available on the host HW. The virtual PMU IRQ injection for Guest VCPUs is managed by small piece of code shared between KVM ARM and KVM ARM64. The virtual PMU IRQ number will be based on Guest machine model and user space will provide it using set device address vm ioctl. The second last patch of this series implements full context switch of PMU registers which will context switch all PMU registers on every KVM world-switch. The last patch implements a lazy context switch of PMU registers which is very similar to lazy debug context switch. (Refer, http://lists.infradead.org/pipermail/linux-arm-kernel/2014-July/271040.html) Also, we reserve last PMU event counter for EL2 mode which will not be accessible from Host and Guest EL1 mode. This reserved EL2 mode PMU event counter can be used for profiling KVM world-switch and other EL2 mode functions. All testing have been done using KVMTOOL on X-Gene Mustang and Foundation v8 Model for both Aarch32 and Aarch64 guest. Anup Patel (6): ARM64: Move PMU register related defines to asm/pmu.h ARM64: perf: Re-enable overflow interrupt from interrupt handler ARM: perf: Re-enable overflow interrupt from interrupt handler ARM/ARM64: KVM: Add common code PMU IRQ routing ARM64: KVM: Implement full context switch of PMU registers ARM64: KVM: Upgrade to lazy context switch of PMU registers arch/arm/include/asm/kvm_host.h | 9 + arch/arm/include/uapi/asm/kvm.h | 1 + arch/arm/kernel/perf_event_v7.c | 8 + arch/arm/kvm/arm.c | 6 + arch/arm/kvm/reset.c | 4 + arch/arm64/include/asm/kvm_asm.h | 39 +++- arch/arm64/include/asm/kvm_host.h | 12 ++ arch/arm64/include/asm/pmu.h | 44 +++++ arch/arm64/include/uapi/asm/kvm.h | 1 + arch/arm64/kernel/asm-offsets.c | 2 + arch/arm64/kernel/perf_event.c | 40 +--- arch/arm64/kvm/Kconfig | 7 + arch/arm64/kvm/Makefile | 1 + arch/arm64/kvm/hyp-init.S | 15 ++ arch/arm64/kvm/hyp.S | 209 +++++++++++++++++++- arch/arm64/kvm/reset.c | 4 + arch/arm64/kvm/sys_regs.c | 385 +++++++++++++++++++++++++++++++++---- include/kvm/arm_pmu.h | 52 +++++ virt/kvm/arm/pmu.c | 105 ++++++++++ 19 files changed, 870 insertions(+), 74 deletions(-) create mode 100644 include/kvm/arm_pmu.h create mode 100644 virt/kvm/arm/pmu.c -- 1.7.9.5 -- 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
