Hi Christoffer, On Sat, Nov 8, 2014 at 1:55 AM, Christoffer Dall <christoffer.dall@xxxxxxxxxx> wrote: > Hi Anup, > > [This time to the new email] > > What are your plans in terms of follow-up on this one? Actually, I am already working on RFC v2. I will send-out RFC v2 sometime next time. This RFC v2 will be RFC v1 based upon Marc's IRQ forwarding patchset. I will try to address PMU context switching for KVM ARM in RFC v3. Does this sound OK? Regards, Anup > > 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
