Hi Anup, [This time to the new email] What are your plans in terms of follow-up on this one? Should we review these patches and reply to anup _at_ brainfaul.org or are you looking for someone else to pick them up? Thanks, -Christoffer On Tue, Aug 05, 2014 at 02:54:09PM +0530, Anup Patel wrote: > 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
