Yes, sounds good. I will review RFC v2 then. -Christoffer On Sat, Nov 8, 2014 at 10:36 AM, Anup Patel <anup@xxxxxxxxxxxxxx> wrote: > 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
